#!/usr/bin/env python3
# SPDX-FileCopyrightText: Copyright (c) 2025-2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
# SPDX-License-Identifier: Apache-2.0

"""
Dynamo System Information Checker

Diagnostic tool that displays system configuration and Dynamo project status
in a hierarchical tree format. This script checks for:

- System resources (OS, CPU, memory, GPU)
- Container/host context (execution context, /dev/shm sizing, selected env)
- Development tools (Cargo/Rust, Maturin, Python)
- LLM frameworks (vllm, sglang, tensorrt_llm)
- Dynamo runtime and framework components
- File system (permissions and disk space, more detail with --thorough-check)
- HuggingFace model cache (more detail with --thorough-check)
- Installation status and component availability

IMPORTANT: This script is STANDALONE and uses only Python stdlib (no Dynamo components).

Why: Must work before Dynamo is built/installed (CI, fresh containers, build failures).
This tool is for pre-deployment validation; dynamo.common.config_dump is for runtime.

Hard-coded paths: Uses defaults (e.g., ~/.cache/huggingface/hub) for predictable
behavior even when environment variables are misconfigured. See class docs for details.

The output uses status indicators:
- ✅ Component found and working
- ❌ Component missing or error
- ⚠️ Warning condition
- ❓ Component not found (for optional items)

By default, the tool runs quickly by checking only directory permissions and skipping
size calculations. Use --thorough-check for detailed file-level permission analysis,
directory size information, disk space checking, ulimit information, and DYN_* env.

`--json-output` prints a minified JSON tree (terse subset) for copy/paste into issues.

Exit codes:
- 0: All critical components are present
- 1: One or more errors detected (❌ status)

Example output (default mode):

System info (hostname=jensen-linux, IP=10.111.122.133)
├─ OS Ubuntu 24.04.1 LTS (Noble Numbat) (Linux 6.11.0-28-generic x86_64), Memory=26.7/125.5 GiB, Cores=32
│  ├─ Execution context: container
│  ├─ DYNAMO_COMMIT_SHA: <sha or "not set">
│  └─ Shared memory (/dev/shm): <used/total/avail>
├─ User info: user=ubuntu, uid=1000, gid=1000
├─ ✅ NVIDIA GPU NVIDIA RTX 6000 Ada Generation, driver 570.133.07, CUDA 12.8, Power=26.14/300.00 W, Memory=289/49140 MiB
├─ 🤖Framework
│  ├─ ✅ vLLM: 0.10.1.1, module=/opt/vllm/vllm/__init__.py, exec=/opt/dynamo/venv/bin/vllm
│  └─ ✅ Sglang: 0.3.0, module=/opt/sglang/sglang/__init__.py
├─ File System
│  ├─ ✅ Dynamo workspace ($HOME/dynamo) writable
│  ├─ ✅ Dynamo .git directory writable
│  ├─ ✅ Rustup home ($HOME/.rustup) writable
│  ├─ ✅ Cargo home ($HOME/.cargo) writable
│  ├─ ✅ Cargo target ($HOME/dynamo/.build/target) writable
│  └─ ✅ Python site-packages ($HOME/dynamo/venv/lib/python3.12/site-packages) writable
├─ ✅ Hugging Face Cache 3 models in ~/.cache/huggingface/hub
├─ ✅ Cargo $HOME/.cargo/bin/cargo, cargo 1.89.0 (c24e10642 2025-06-23)
│  ├─ Cargo home directory CARGO_HOME=$HOME/.cargo
│  └─ Cargo target directory CARGO_TARGET_DIR=$HOME/dynamo/.build/target
│     ├─ Debug $HOME/dynamo/.build/target/debug, modified=2025-08-30 16:26:49 PDT
│     ├─ Release $HOME/dynamo/.build/target/release, modified=2025-08-30 18:21:12 PDT
│     └─ Binary $HOME/dynamo/.build/target/debug/libdynamo_llm_capi.so, modified=2025-08-30 16:25:37 PDT
├─ ✅ Maturin /opt/dynamo/venv/bin/maturin, maturin 1.9.3
├─ ✅ Python 3.12.3, /opt/dynamo/venv/bin/python
│  ├─ ✅ PyTorch 2.7.1+cu128, ✅torch.cuda.is_available
│  └─ PYTHONPATH not set
└─ Dynamo $HOME/dynamo
   ├─ Git HEAD: a03d29066, branch=main, Date: 2025-08-30 16:22:29 PDT
   ├─ ✅ Runtime components ai-dynamo-runtime 0.4.1
   │  │  /opt/dynamo/venv/lib/python3.12/site-packages/ai_dynamo_runtime-0.4.1.dist-info: created=2025-08-30 19:14:29 PDT
   │  │  /opt/dynamo/venv/lib/python3.12/site-packages/ai_dynamo_runtime.pth: modified=2025-08-30 19:14:29 PDT
   │  │  └─ →: $HOME/dynamo/lib/bindings/python/src
   │  ├─ ✅ dynamo._core             $HOME/dynamo/lib/bindings/python/src/dynamo/_core.cpython-312-x86_64-linux-gnu.so, modified=2025-08-30 19:14:29 PDT
   │  ├─ ✅ dynamo.logits_processing $HOME/dynamo/lib/bindings/python/src/dynamo/logits_processing/__init__.py
   │  ├─ ✅ dynamo.nixl_connect      $HOME/dynamo/lib/bindings/python/src/dynamo/nixl_connect/__init__.py
   │  ├─ ✅ dynamo.llm               $HOME/dynamo/lib/bindings/python/src/dynamo/llm/__init__.py
   │  └─ ✅ dynamo.runtime           $HOME/dynamo/lib/bindings/python/src/dynamo/runtime/__init__.py
   └─ ✅ Framework components ai-dynamo 0.5.0
      │  /opt/dynamo/venv/lib/python3.12/site-packages/ai_dynamo-0.5.0.dist-info: created=2025-09-05 16:20:35 PDT
      ├─ ✅ dynamo.frontend  $HOME/dynamo/components/src/dynamo/frontend/__init__.py
      ├─ ✅ dynamo.llama_cpp $HOME/dynamo/components/src/dynamo/llama_cpp/__init__.py
      ├─ ✅ dynamo.mocker    $HOME/dynamo/components/src/dynamo/mocker/__init__.py
      ├─ ✅ dynamo.planner   $HOME/dynamo/components/src/dynamo/planner/__init__.py
      ├─ ✅ dynamo.sglang    $HOME/dynamo/components/src/dynamo/sglang/__init__.py
      ├─ ✅ dynamo.trtllm    $HOME/dynamo/components/src/dynamo/trtllm/__init__.py
      └─ ✅ dynamo.vllm      $HOME/dynamo/components/src/dynamo/vllm/__init__.py

Usage:
    python deploy/sanity_check.py [--thorough-check] [--terse] [--runtime-check] [--json-output]

Options:
    --thorough-check  Enable thorough checking (file permissions, directory sizes, disk space, ulimits, DYN_* env, HuggingFace model details)
    --terse           Enable terse output mode (show only essential info and errors)
    --json-output     Output a JSON representation (terse subset) suitable for copy/paste
    --runtime-check   Skip compile-time dependency checks (Rust, Cargo, Maturin) for runtime containers
                      and validate ai-dynamo packages (ai-dynamo-runtime and ai-dynamo)
    --no-gpu-check    Skip GPU detection and information collection (useful for environments without GPU access)
    --no-framework-check Skip LLM framework package checks (vllm, sglang, tensorrt_llm)
"""

import datetime
import glob
import json
import logging
import os
import platform
import resource
import shutil
import subprocess
import sys
from dataclasses import dataclass, field
from enum import Enum
from typing import Any, Dict, List, Optional, Tuple

# Path constants
DYNAMO_RUNTIME_SRC_PATH = "lib/bindings/python/src/dynamo"


# ANSI color constants
class Colors:
    """ANSI color escape sequences for terminal output."""

    RESET = "\033[0m"
    BRIGHT_RED = "\033[38;5;196m"


class NodeStatus(Enum):
    """Status of a tree node"""

    OK = "ok"  # ✅ Success/available
    ERROR = "error"  # ❌ Error/not found
    WARNING = "warn"  # ⚠️ Warning
    INFO = "info"  # No symbol, just information
    NONE = "none"  # No status indicator
    UNKNOWN = "unknown"  # ❓ Unknown/not found


@dataclass
class NodeInfo:
    """Base class for all information nodes in the tree structure"""

    # Core properties
    label: str  # Main text/description
    desc: Optional[str] = None  # Primary value/description
    status: NodeStatus = NodeStatus.NONE  # Status indicator

    # Additional metadata as key-value pairs
    metadata: Dict[str, Any] = field(default_factory=dict)

    # Tree structure
    children: List["NodeInfo"] = field(default_factory=list)

    # Display control
    show_symbol: bool = True  # Whether to show status symbol

    def add_child(self, child: "NodeInfo") -> "NodeInfo":
        """Add a child node and return it for chaining"""
        self.children.append(child)
        return child

    def add_metadata(self, key: str, value: str) -> "NodeInfo":
        """Add metadata key-value pair"""
        self.metadata[key] = value
        return self

    def render(
        self, prefix: str = "", is_last: bool = True, is_root: bool = True
    ) -> List[str]:
        """Render the tree node and its children as a list of strings"""
        lines = []

        # Determine the connector
        if not is_root:
            # Check if this is a sub-category item
            if self.metadata and self.metadata.get("part_of_previous"):
                connector = "│"
            else:
                connector = "└─" if is_last else "├─"
            current_prefix = prefix + connector + " "
        else:
            current_prefix = ""

        # Build the line content
        line_parts = []

        # Add status symbol
        if self.show_symbol and self.status != NodeStatus.NONE:
            if self.status == NodeStatus.OK:
                line_parts.append("✅")
            elif self.status == NodeStatus.ERROR:
                line_parts.append("❌")
            elif self.status == NodeStatus.WARNING:
                line_parts.append("⚠️")
            elif self.status == NodeStatus.UNKNOWN:
                line_parts.append("❓")

        # Add label and value
        if self.desc:
            line_parts.append(f"{self.label}: {self.desc}")
        else:
            line_parts.append(self.label)

        # Add metadata inline - consistent format for all
        if self.metadata:
            metadata_items = []
            for k, v in self.metadata.items():
                # Skip internal metadata that shouldn't be displayed
                if k != "part_of_previous":
                    # Format all metadata consistently as "key=value"
                    metadata_items.append(f"{k}={v}")

            if metadata_items:
                # Use consistent separator (comma) for all metadata
                metadata_str = ", ".join(metadata_items)
                line_parts[-1] += f", {metadata_str}"

        # Construct the full line
        line_content = " ".join(line_parts)
        if current_prefix or line_content:
            lines.append(current_prefix + line_content)

        # Render children
        for i, child in enumerate(self.children):
            is_last_child = i == len(self.children) - 1
            if is_root:
                child_prefix = ""
            else:
                child_prefix = prefix + ("   " if is_last else "│  ")
            lines.extend(child.render(child_prefix, is_last_child, False))

        return lines

    def print_tree(self) -> None:
        """Print the tree to console"""
        for line in self.render():
            print(line)

    def to_json_obj(self) -> Dict[str, Any]:
        """
        Convert this node into a JSON-serializable object.

        Why: `--json-output` needs a copy/pasteable representation of the tree without
        relying on terminal formatting characters or emojis.
        """

        def _clean_json_text(text: str) -> str:
            # Why: tree output uses emojis and padding for human readability. In
            # JSON mode we have explicit `status`, so we strip UI-only prefixes.
            text = text.strip()
            for prefix in ("✅", "❌", "⚠️", "❓"):
                if text.startswith(prefix):
                    text = text[len(prefix) :].lstrip()
                    break
            if text.startswith("🤖"):
                text = text[len("🤖") :].lstrip()
            return text.strip()

        obj: Dict[str, Any] = {"label": _clean_json_text(self.label)}
        if self.desc is not None:
            obj["desc"] = _clean_json_text(self.desc)

        # Keep status stable and machine-friendly.
        # NOTE: `NodeStatus.INFO` exists but typically doesn't render a symbol.
        if self.status != NodeStatus.NONE:
            obj["status"] = self.status.value

        if self.metadata:
            # Exclude internal metadata keys used for rendering.
            metadata = {
                k: v for k, v in self.metadata.items() if k != "part_of_previous"
            }
            if metadata:
                obj["meta"] = metadata

        if self.children:
            obj["children"] = [child.to_json_obj() for child in self.children]

        return obj

    def has_errors(self) -> bool:
        """Check if this node or any of its children have errors"""
        # Check if this node has an error
        if self.status == NodeStatus.ERROR:
            return True

        # Recursively check all children
        for child in self.children:
            if child.has_errors():
                return True

        return False

    def _replace_home_with_var(self, path: str) -> str:
        """Replace home directory with $HOME in path."""
        home = os.path.expanduser("~")
        if path.startswith(home):
            return path.replace(home, "$HOME", 1)
        return path

    def _is_inside_container(self) -> bool:
        """Check if we're running inside a container."""
        # Check for common container indicators
        container_indicators = [
            # Docker
            os.path.exists("/.dockerenv"),
            # Podman/containerd
            os.path.exists("/run/.containerenv"),
            # Check if cgroup contains docker/containerd
            self._check_cgroup_for_container(),
            # Check environment variables
            os.environ.get("container") is not None,
            os.environ.get("DOCKER_CONTAINER") is not None,
        ]
        return any(container_indicators)

    def _check_cgroup_for_container(self) -> bool:
        """Check cgroup for container indicators."""
        try:
            with open("/proc/1/cgroup", "r") as f:
                content = f.read()
                return any(
                    indicator in content.lower()
                    for indicator in ["docker", "containerd", "podman", "lxc"]
                )
        except Exception:
            return False

    def _get_gpu_container_remedies(self) -> str:
        """Get remedies for GPU issues when running inside a container."""
        return "maybe try a docker restart?"

    def _format_timestamp_pdt(self, timestamp: float) -> str:
        """Format timestamp as PDT time string."""
        dt_utc = datetime.datetime.fromtimestamp(timestamp, tz=datetime.timezone.utc)
        # Convert to PDT (UTC-7)
        dt_pdt = dt_utc - datetime.timedelta(hours=7)
        return dt_pdt.strftime("%Y-%m-%d %H:%M:%S PDT")


class SystemInfo(NodeInfo):
    """Root node for system information"""

    def __init__(
        self,
        hostname: Optional[str] = None,
        thorough_check: bool = False,
        terse: bool = False,
        runtime_check: bool = False,
        no_gpu_check: bool = False,
        no_framework_check: bool = False,
    ):
        self.thorough_check = thorough_check
        self.terse = terse
        self.runtime_check = runtime_check
        self.no_gpu_check = no_gpu_check
        self.no_framework_check = no_framework_check
        if hostname is None:
            hostname = platform.node()

        # Get IP address
        ip_address = self._get_ip_address()

        # Format label with hostname and IP
        if ip_address:
            label = f"System info (hostname={hostname}, IP={ip_address})"
        else:
            label = f"System info (hostname={hostname})"

        super().__init__(label=label, status=NodeStatus.INFO)

        # Suppress Prometheus endpoint warnings from planner module
        self._suppress_planner_warnings()

        # Collect and add all system information
        # Always show: OS, User, GPU, Framework, Dynamo
        os_info = OSInfo()
        # Put execution context and build SHA directly under OS for quick triage when
        # scanning logs.
        os_info.add_child(
            NodeInfo(
                label="Execution context",
                desc="container"
                if self._is_inside_container()
                else "host (non-docker)",
                status=NodeStatus.INFO,
            )
        )
        dynamo_commit_sha = os.environ.get("DYNAMO_COMMIT_SHA")
        os_info.add_child(
            NodeInfo(
                label="DYNAMO_COMMIT_SHA",
                desc=dynamo_commit_sha.strip() if dynamo_commit_sha else "not set",
                status=NodeStatus.INFO,
            )
        )
        # Attach host/container context directly under OS (no wrapper node), so it is
        # visible near the top when copy/pasting logs.
        os_info.add_child(self._dev_shm_info_node())
        indicators = self._container_indicators_node()
        if indicators is not None:
            os_info.add_child(indicators)
        selected_env = self._selected_env_node()
        if selected_env is not None:
            os_info.add_child(selected_env)
        if self.thorough_check:
            dyn_env = self._dyn_env_node()
            if dyn_env is not None:
                os_info.add_child(dyn_env)
            os_info.add_child(self._ulimit_info_node())

        self.add_child(os_info)
        self.add_child(UserInfo())

        # Add GPU info (always show, even if not found) unless --no-gpu-check
        if not self.no_gpu_check:
            gpu_info = GPUInfo()
            self.add_child(gpu_info)

        # Add Framework info (vllm, sglang, tensorrt_llm)
        self.add_child(FrameworkInfo(no_framework_check=self.no_framework_check))

        # In terse mode, only add other components if they have errors
        if not self.terse:
            # Add file permissions check
            self.add_child(
                FilePermissionsInfo(
                    thorough_check=self.thorough_check, runtime_check=self.runtime_check
                )
            )

            # Add HuggingFace cache check
            self.add_child(HuggingFaceInfo(thorough_check=self.thorough_check))

            # Skip compile-time dependencies in runtime-check mode
            if not self.runtime_check:
                # Add Cargo (always show, even if not found)
                self.add_child(CargoInfo(thorough_check=self.thorough_check))

                # Add Maturin (Python-Rust build tool)
                self.add_child(MaturinInfo())

            # Add Python info
            self.add_child(PythonInfo(runtime_check=self.runtime_check))
        else:
            # In terse mode, only add components that have errors
            self._add_error_only_components()

        # Add Dynamo workspace info (always show, even if not found)
        self.add_child(
            DynamoInfo(
                thorough_check=self.thorough_check, runtime_check=self.runtime_check
            )
        )

    def _dev_shm_info_node(self) -> NodeInfo:
        """Report /dev/shm sizing and mount options (common source of container issues)."""
        path = "/dev/shm"
        if not os.path.exists(path):
            return NodeInfo(
                label="Shared memory (/dev/shm)",
                desc="not present",
                status=NodeStatus.WARNING,
            )

        status = NodeStatus.INFO
        desc = path
        try:
            st = os.statvfs(path)
            total = st.f_frsize * st.f_blocks
            avail = st.f_frsize * st.f_bavail
            used = max(total - avail, 0)

            def _fmt_gib(n: int) -> str:
                return f"{(n / (1024**3)):.2f} GiB"

            desc = f"{_fmt_gib(used)}/{_fmt_gib(total)} used (avail {_fmt_gib(avail)})"

            # Heuristic: small /dev/shm is a common default in Docker and can break
            # shared-memory heavy workloads.
            if total < 1 * 1024**3:
                status = NodeStatus.WARNING
        except Exception:
            desc = "unable to statvfs"
            status = NodeStatus.WARNING

        node = NodeInfo(label="Shared memory (/dev/shm)", desc=desc, status=status)
        node.add_metadata("writable", str(os.access(path, os.W_OK)).lower())

        # Best-effort mount info from /proc/mounts (stdlib only).
        try:
            with open("/proc/mounts", "r") as f:
                for line in f:
                    parts = line.split()
                    if len(parts) >= 4 and parts[1] == path:
                        node.add_metadata("fstype", parts[2])
                        node.add_metadata("opts", parts[3])
                        break
        except Exception:
            pass

        return node

    def _container_indicators_node(self) -> Optional[NodeInfo]:
        """Return a node describing container indicators, or None if none are present."""
        indicators = NodeInfo(label="Container indicators", status=NodeStatus.INFO)
        if os.path.exists("/.dockerenv"):
            indicators.add_metadata("dockerenv", "true")
        if os.path.exists("/run/.containerenv"):
            indicators.add_metadata("containerenv", "true")

        container_env = os.environ.get("container")
        if container_env is not None and container_env != "":
            indicators.add_metadata("container", container_env)

        docker_container_env = os.environ.get("DOCKER_CONTAINER")
        if docker_container_env is not None and docker_container_env != "":
            indicators.add_metadata("DOCKER_CONTAINER", docker_container_env)

        if not indicators.metadata:
            return None
        return indicators

    def _selected_env_node(self) -> Optional[NodeInfo]:
        """Return a small set of env vars that are often relevant for debugging."""
        env_node = NodeInfo(label="Selected env", status=NodeStatus.INFO)
        for k in [
            "DYNAMO_HOME",
            "CUDA_VISIBLE_DEVICES",
            "NVIDIA_VISIBLE_DEVICES",
            "NVIDIA_DRIVER_CAPABILITIES",
            "DYN_SYSTEM_PORT",
        ]:
            v = os.environ.get(k)
            if v is not None and v != "":
                env_node.add_metadata(k, v)
        if not env_node.metadata:
            return None
        return env_node

    def _dyn_env_node(self) -> Optional[NodeInfo]:
        """Return all DYN_* env vars, one per line, or None if none are set."""
        dyn_env = {k: v for k, v in os.environ.items() if k.startswith("DYN_")}
        if not dyn_env:
            return None
        dyn_env_node = NodeInfo(
            label="DYN_* env",
            desc=f"{len(dyn_env)} variables",
            status=NodeStatus.INFO,
        )
        for k in sorted(dyn_env.keys()):
            v = dyn_env.get(k)
            if v is None:
                continue
            dyn_env_node.add_child(NodeInfo(label=k, desc=v, status=NodeStatus.INFO))
        return dyn_env_node

    def _ulimit_info_node(self) -> NodeInfo:
        """Summarize key RLIMITs (similar to `ulimit`) using stdlib only."""
        node = NodeInfo(label="Ulimits", status=NodeStatus.INFO)

        def _fmt_limit(value: int) -> str:
            # resource.RLIM_INFINITY is typically a very large integer.
            if value == resource.RLIM_INFINITY:
                return "unlimited"
            return str(value)

        # Keep this list small and high-signal for serving workloads.
        limits: List[Tuple[str, int]] = [
            ("nofile", resource.RLIMIT_NOFILE),
            ("nproc", resource.RLIMIT_NPROC),
            ("memlock", resource.RLIMIT_MEMLOCK),
            ("stack", resource.RLIMIT_STACK),
            ("core", resource.RLIMIT_CORE),
        ]

        for name, rlim in limits:
            try:
                soft, hard = resource.getrlimit(rlim)
                node.add_metadata(name, f"{_fmt_limit(soft)}:{_fmt_limit(hard)}")
            except Exception:
                # Avoid failing sanity_check on platforms/containers that restrict access.
                pass

        return node

    def _get_ip_address(self) -> Optional[str]:
        """Get the primary IP address of the system."""
        try:
            import socket

            # Get hostname
            hostname = socket.gethostname()
            # Get IP address
            ip_address = socket.gethostbyname(hostname)
            # Filter out localhost
            if ip_address.startswith("127."):
                # Try to get external IP by connecting to a public DNS
                s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
                try:
                    # Connect to Google DNS (doesn't actually send data)
                    s.connect(("8.8.8.8", 80))
                    ip_address = s.getsockname()[0]
                finally:
                    s.close()
            return ip_address
        except Exception:
            return None

    def _suppress_planner_warnings(self) -> None:
        """Suppress Prometheus endpoint warnings from planner module during import testing."""
        # The planner module logs a warning about Prometheus endpoint when imported
        # outside of a Kubernetes cluster. Suppress this for cleaner output.
        planner_logger = logging.getLogger("dynamo.planner.defaults")
        planner_logger.setLevel(logging.ERROR)
        # Also suppress the defaults._get_default_prometheus_endpoint logger
        defaults_logger = logging.getLogger("defaults._get_default_prometheus_endpoint")
        defaults_logger.setLevel(logging.ERROR)

    def _add_error_only_components(self) -> None:
        """In terse mode, only add components that have errors"""
        # Create components and check their status
        components_to_check = [
            (
                "File System",
                FilePermissionsInfo(
                    thorough_check=self.thorough_check, runtime_check=self.runtime_check
                ),
            ),
            ("Python", PythonInfo(runtime_check=self.runtime_check)),
        ]

        # Skip compile-time dependencies in runtime-check mode
        if not self.runtime_check:
            components_to_check.extend(
                [
                    ("Cargo", CargoInfo(thorough_check=self.thorough_check)),
                    ("Maturin", MaturinInfo()),
                ]
            )

        for name, component in components_to_check:
            # Only add if the component has an error status
            if component.status == NodeStatus.ERROR:
                self.add_child(component)


class UserInfo(NodeInfo):
    """User information"""

    def __init__(self):
        # Get user info
        username = os.getenv("USER") or os.getenv("LOGNAME") or "unknown"
        if username == "unknown":
            try:
                import pwd

                username = pwd.getpwuid(os.getuid()).pw_name
            except Exception:
                try:
                    import subprocess

                    result = subprocess.run(
                        ["whoami"], capture_output=True, text=True, timeout=5
                    )
                    if result.returncode == 0:
                        username = result.stdout.strip()
                except Exception:
                    pass
        uid = os.getuid()
        gid = os.getgid()

        desc = f"user={username}, uid={uid}, gid={gid}"

        # Add warning if running as root
        status = NodeStatus.WARNING if uid == 0 else NodeStatus.INFO
        if uid == 0:
            desc += " ⚠️"

        super().__init__(label="User info", desc=desc, status=status)


class OSInfo(NodeInfo):
    """Operating system information"""

    def __init__(self):
        # Collect OS information
        uname = platform.uname()

        # Try to get distribution info
        distro = ""
        version = ""
        try:
            if os.path.exists("/etc/os-release"):
                with open("/etc/os-release", "r") as f:
                    for line in f:
                        if line.startswith("NAME="):
                            distro = line.split("=", 1)[1].strip().strip('"')
                        elif line.startswith("VERSION="):
                            version = line.split("=", 1)[1].strip().strip('"')
        except Exception:
            pass

        # Get memory info
        mem_used_gb = None
        mem_total_gb = None
        try:
            with open("/proc/meminfo", "r") as f:
                meminfo = {}
                for line in f:
                    if ":" in line:
                        k, v = line.split(":", 1)
                        meminfo[k.strip()] = v.strip()

                if "MemTotal" in meminfo and "MemAvailable" in meminfo:
                    total_kb = float(meminfo["MemTotal"].split()[0])
                    avail_kb = float(meminfo["MemAvailable"].split()[0])
                    mem_used_gb = (total_kb - avail_kb) / (1024 * 1024)
                    mem_total_gb = total_kb / (1024 * 1024)
        except Exception:
            pass

        # Get CPU cores
        cores = os.cpu_count()

        # Build the value string
        if distro:
            value = f"{distro} {version} ({uname.system} {uname.release} {uname.machine})".strip()
        else:
            value = f"{uname.system} {uname.release} {uname.machine}"

        super().__init__(label="OS", desc=value, status=NodeStatus.INFO)

        # Add memory and cores as metadata
        if mem_used_gb is not None and mem_total_gb is not None:
            self.add_metadata("Memory", f"{mem_used_gb:.1f}/{mem_total_gb:.1f} GiB")
            if mem_total_gb > 0 and (mem_used_gb / mem_total_gb) >= 0.9:
                self.status = NodeStatus.WARNING
        if cores:
            self.add_metadata("Cores", str(cores))


class GPUInfo(NodeInfo):
    """NVIDIA GPU information"""

    def __init__(self):
        # Find nvidia-smi executable (check multiple paths)
        nvidia_smi = shutil.which("nvidia-smi")
        if not nvidia_smi:
            # Check common paths if `which` fails
            for candidate in [
                "/usr/bin/nvidia-smi",
                "/usr/local/bin/nvidia-smi",
                "/usr/local/nvidia/bin/nvidia-smi",
            ]:
                if os.path.exists(candidate) and os.access(candidate, os.X_OK):
                    nvidia_smi = candidate
                    break

        if not nvidia_smi:
            super().__init__(
                label="NVIDIA GPU", desc="nvidia-smi not found", status=NodeStatus.ERROR
            )
            return

        try:
            # Get GPU list
            result = subprocess.run(
                [nvidia_smi, "-L"], capture_output=True, text=True, timeout=10
            )

            if result.returncode != 0:
                # Extract and process error message from stderr or stdout
                error_msg = "nvidia-smi failed"

                # Try stderr first, then stdout
                for output in [result.stderr, result.stdout]:
                    if output and output.strip():
                        error_lines = output.strip().splitlines()
                        if error_lines:
                            error_msg = error_lines[0].strip()
                            break

                # Handle NVML-specific errors
                if "Failed to initialize NVML" in error_msg:
                    error_msg = "No NVIDIA GPU detected (NVML initialization failed)"
                    # Add docker restart suggestion specifically for NVML failures in containers
                    if self._is_inside_container():
                        error_msg += " - maybe try a docker restart?"

                super().__init__(
                    label="NVIDIA GPU", desc=error_msg, status=NodeStatus.ERROR
                )
                return

            # Parse GPU names
            gpu_names = []
            lines = result.stdout.strip().splitlines()
            for line in lines:
                # Example: "GPU 0: NVIDIA A100-SXM4-40GB (UUID: GPU-...)"
                if ":" in line:
                    gpu_name = line.split(":", 1)[1].split("(")[0].strip()
                    gpu_names.append(gpu_name)

            # Check for zero GPUs
            if not gpu_names:
                # Get driver and CUDA even for zero GPUs
                driver, cuda = self._get_driver_cuda_versions(nvidia_smi)
                driver_cuda_str = ""
                if driver or cuda:
                    parts = []
                    if driver:
                        parts.append(f"driver {driver}")
                    if cuda:
                        parts.append(f"CUDA {cuda}")
                    driver_cuda_str = f", {', '.join(parts)}"
                super().__init__(
                    label="NVIDIA GPU",
                    desc=f"not detected{driver_cuda_str}",
                    status=NodeStatus.ERROR,
                )
                return

            # Get driver and CUDA versions
            driver, cuda = self._get_driver_cuda_versions(nvidia_smi)

            # Handle single vs multiple GPUs
            if len(gpu_names) == 1:
                # Single GPU - concise format
                value = gpu_names[0]
                if driver or cuda:
                    driver_cuda = []
                    if driver:
                        driver_cuda.append(f"driver {driver}")
                    if cuda:
                        driver_cuda.append(f"CUDA {cuda}")
                    value += f", {', '.join(driver_cuda)}"

                super().__init__(label="NVIDIA GPU", desc=value, status=NodeStatus.OK)

                # Add power and memory metadata for single GPU
                self._add_power_memory_info(nvidia_smi, 0)
            else:
                # Multiple GPUs - show count in main label
                value = f"{len(gpu_names)} GPUs"
                if driver or cuda:
                    driver_cuda = []
                    if driver:
                        driver_cuda.append(f"driver {driver}")
                    if cuda:
                        driver_cuda.append(f"CUDA {cuda}")
                    value += f", {', '.join(driver_cuda)}"

                super().__init__(label="NVIDIA GPU", desc=value, status=NodeStatus.OK)

                # Add each GPU as a child node
                for i, name in enumerate(gpu_names):
                    gpu_child = NodeInfo(
                        label=f"GPU {i}", desc=name, status=NodeStatus.OK
                    )
                    # Add power and memory for this specific GPU
                    power_mem = self._get_power_memory_string(nvidia_smi, i)
                    if power_mem:
                        gpu_child.add_metadata("Stats", power_mem)
                    self.add_child(gpu_child)

        except Exception:
            super().__init__(
                label="NVIDIA GPU", desc="detection failed", status=NodeStatus.ERROR
            )

    def _get_driver_cuda_versions(
        self, nvidia_smi: str
    ) -> Tuple[Optional[str], Optional[str]]:
        """Get NVIDIA driver and CUDA versions using query method."""
        driver, cuda = None, None
        try:
            # Use query method for more reliable detection
            result = subprocess.run(
                [nvidia_smi, "--query-gpu=driver_version", "--format=csv,noheader"],
                capture_output=True,
                text=True,
                timeout=10,
            )
            if result.returncode == 0 and result.stdout.strip():
                driver = result.stdout.strip().splitlines()[0].strip()

            # Try to get CUDA version from nvidia-smi output
            result = subprocess.run(
                [nvidia_smi], capture_output=True, text=True, timeout=10
            )
            if result.returncode == 0:
                import re

                m = re.search(r"CUDA Version:\s*([0-9.]+)", result.stdout)
                if m:
                    cuda = m.group(1)
        except Exception:
            pass
        return driver, cuda

    def _add_power_memory_info(self, nvidia_smi: str, gpu_index: int = 0):
        """Add power and memory metadata for a specific GPU."""
        power_mem = self._get_power_memory_string(nvidia_smi, gpu_index)
        if power_mem:
            # Split into Power and Memory parts
            if "; " in power_mem:
                parts = power_mem.split("; ")
                for part in parts:
                    if part.startswith("Power:"):
                        self.add_metadata("Power", part.replace("Power: ", ""))
                    elif part.startswith("Memory:"):
                        self.add_metadata("Memory", part.replace("Memory: ", ""))

    def _get_power_memory_string(
        self, nvidia_smi: str, gpu_index: int = 0
    ) -> Optional[str]:
        """Get power and memory info string for a specific GPU."""
        try:
            result = subprocess.run(
                [
                    nvidia_smi,
                    "--query-gpu=power.draw,power.limit,memory.used,memory.total",
                    "--format=csv,noheader,nounits",
                ],
                capture_output=True,
                text=True,
                timeout=10,
            )
            if result.returncode == 0 and result.stdout.strip():
                lines = result.stdout.strip().splitlines()
                if gpu_index < len(lines):
                    parts = lines[gpu_index].split(",")
                    if len(parts) >= 4:
                        power_draw = parts[0].strip()
                        power_limit = parts[1].strip()
                        mem_used = parts[2].strip()
                        mem_total = parts[3].strip()

                        info_parts = []
                        if power_draw and power_limit:
                            info_parts.append(f"Power: {power_draw}/{power_limit} W")

                        if mem_used and mem_total:
                            # Add warning if memory usage is 90% or higher
                            warning = ""
                            try:
                                if float(mem_used) / float(mem_total) >= 0.9:
                                    warning = " ⚠️"
                            except Exception:
                                pass
                            info_parts.append(
                                f"Memory: {mem_used}/{mem_total} MiB{warning}"
                            )

                        if info_parts:
                            return "; ".join(info_parts)
        except Exception:
            pass
        return None


class FilePermissionsInfo(NodeInfo):
    """File system check for development environment directories

    Checks writability of critical directories needed for:
    - Dynamo development (top-level dynamo directory)
    - Rust development (Cargo target directory + all files, RUSTUP_HOME, CARGO_HOME) - skipped in runtime_check mode
    - Python development (site-packages)

    In thorough mode, also checks disk space for the dynamo working directory
    and shows a warning if less than 10% free space is available.

    In fast mode, skips recursive file checking in Cargo target directory
    for improved performance on large target directories.

    In runtime_check mode, skips Rust/Cargo toolchain checks.
    """

    def __init__(self, thorough_check: bool = False, runtime_check: bool = False):
        super().__init__(label="File System", status=NodeStatus.INFO)
        self.thorough_check = thorough_check
        self.runtime_check = runtime_check

        # Check top-level dynamo directory
        self._check_dynamo_directory_permissions()

        # Skip Rust toolchain checks in runtime-check mode
        if not self.runtime_check:
            # Check Rust toolchain directories (RUSTUP_HOME and CARGO_HOME)
            self._check_rust_toolchain_permissions()

            # Check Cargo target directory (with optional recursive file checking)
            self._check_cargo_target_permissions()

        # Check Python site-packages directory
        self._check_site_packages_permissions()

    def _check_permissions_unified(
        self,
        candidate_paths: List[str],
        label_prefix: str,
        recursive: bool = False,
        exclude_files: Optional[List[str]] = None,
    ) -> List[NodeInfo]:
        """Unified permission checking function

        Args:
            candidate_paths: List of paths to check, uses first available one
            label_prefix: Prefix for the node label
            recursive: If True, check all files recursively; if False, check directory only
            exclude_files: List of filenames to exclude from file checking (e.g., ['.git'])

        Returns:
            List of NodeInfo objects for the results
        """
        exclude_files = exclude_files or []
        results = []

        # Find first available path
        selected_path = None
        for path in candidate_paths:
            expanded_path = os.path.expanduser(path)
            if os.path.exists(expanded_path):
                selected_path = expanded_path
                break

        if not selected_path:
            # No paths exist
            path_list = ", ".join(candidate_paths)
            results.append(
                NodeInfo(
                    label=f"{label_prefix} (tried: {path_list})",
                    desc="No candidate paths exist",
                    status=NodeStatus.ERROR,
                )
            )
            return results

        try:
            # Check if it's actually a directory
            if not os.path.isdir(selected_path):
                results.append(
                    NodeInfo(
                        label=f"{label_prefix} ({self._replace_home_with_var(selected_path)})",
                        desc="Path is not a directory",
                        status=NodeStatus.ERROR,
                    )
                )
                return results

            # Check if directory is effectively writable
            if not self._is_effectively_writable(selected_path):
                results.append(
                    NodeInfo(
                        label=f"{label_prefix} ({self._replace_home_with_var(selected_path)})",
                        desc="Directory not writable",
                        status=NodeStatus.ERROR,
                    )
                )
                return results

            if not recursive:
                # Just check directory writability
                # Check if running as root but directory is not owned by root
                is_root = os.getuid() == 0
                is_root_owned = False
                warning_symbol = ""
                desc_text = "writable"
                owner_name = None

                if is_root:
                    try:
                        stat_info = os.stat(selected_path)
                        is_root_owned = stat_info.st_uid == 0
                        if not is_root_owned:
                            warning_symbol = " ⚠️"
                            # Get the owner name
                            try:
                                import pwd

                                owner_name = pwd.getpwuid(stat_info.st_uid).pw_name
                            except Exception:
                                owner_name = f"uid={stat_info.st_uid}"
                        desc_text = f"writable (owned by {owner_name or 'root'})"
                    except Exception:
                        desc_text = "writable (owned by unknown)"

                # Add disk space info in thorough mode
                status = NodeStatus.OK  # Default status
                if self.thorough_check:
                    disk_space, disk_warning = self._format_disk_space(selected_path)
                    desc_text += disk_space
                    # Override status if disk space is low
                    if disk_warning:
                        status = disk_warning

                results.append(
                    NodeInfo(
                        label=f"{label_prefix} ({self._replace_home_with_var(selected_path)}){warning_symbol}",
                        desc=desc_text,
                        status=status,
                    )
                )
            else:
                # Check files recursively
                (
                    total_files,
                    non_writable_files,
                    non_writable_list,
                ) = self._count_writable_files(
                    selected_path, recursive=True, exclude_files=exclude_files
                )

                # Create description based on results
                desc, status = self._create_file_count_description(
                    total_files, non_writable_files, "files"
                )

                # Check if running as root but directory is not owned by root
                is_root = os.getuid() == 0
                is_root_owned = False
                warning_symbol = ""
                owner_name = None

                if is_root:
                    try:
                        stat_info = os.stat(selected_path)
                        is_root_owned = stat_info.st_uid == 0
                        if not is_root_owned:
                            warning_symbol = " ⚠️"
                            # Get the owner name
                            try:
                                import pwd

                                owner_name = pwd.getpwuid(stat_info.st_uid).pw_name
                            except Exception:
                                owner_name = f"uid={stat_info.st_uid}"
                        # Modify description to indicate ownership
                        if "writable" in desc:
                            desc = desc.replace(
                                "writable",
                                f"writable (owned by {owner_name or 'root'})",
                            )
                    except Exception:
                        # Modify description to indicate ownership
                        if "writable" in desc:
                            desc = desc.replace(
                                "writable", "writable (owned by unknown)"
                            )

                # Add disk space info in thorough mode
                if self.thorough_check:
                    disk_space, disk_warning = self._format_disk_space(selected_path)
                    desc += disk_space
                    # Override status if disk space is low
                    if disk_warning:
                        status = disk_warning

                results.append(
                    NodeInfo(
                        label=f"{label_prefix} ({self._replace_home_with_var(selected_path)}){warning_symbol}",
                        desc=desc,
                        status=status,
                    )
                )

                # Add details for non-writable files if there are any (limit to first 10)
                if non_writable_files > 0:
                    details_label = (
                        f"Non-writable files (showing first 10 of {non_writable_files})"
                    )
                    if non_writable_files <= 10:
                        details_label = f"Non-writable files ({non_writable_files})"

                    details_node = NodeInfo(
                        label=details_label,
                        desc="; ".join(non_writable_list[:10]),
                        status=NodeStatus.WARNING,
                    )
                    results.append(details_node)

        except Exception as e:
            results.append(
                NodeInfo(
                    label=f"{label_prefix} ({self._replace_home_with_var(selected_path)})",
                    desc=f"Permission check failed: {str(e)}",
                    status=NodeStatus.ERROR,
                )
            )

        return results

    def _is_effectively_writable(self, file_path: str) -> bool:
        """Check if a file is effectively writable

        A file is considered effectively writable if:
        1. It's already writable (os.access check)
        2. We own the file (can chmod it)
        3. We are root (can do anything) - but only if os.access confirms write access
           Note: Root may still be denied write access on NFS mounts due to root squashing
        """
        try:
            # First check if it's already writable - this works for all cases including NFS
            if os.access(file_path, os.W_OK):
                return True

            # Check if we own the file (and can therefore chmod it)
            stat_info = os.stat(file_path)
            if stat_info.st_uid == os.getuid():
                return True

            # For root, we still need to respect the os.access result
            # Root privileges don't guarantee write access on NFS mounts
            # If os.access(W_OK) returned False above, respect that even for root
            return False
        except Exception:
            # If we can't stat the file, assume it's not writable
            return False

    def _count_writable_files(
        self,
        directory: str,
        recursive: bool = False,
        exclude_files: Optional[List[str]] = None,
    ) -> Tuple[int, int, List[str]]:
        """Count total files and non-writable files in directory

        Returns:
            Tuple of (total_files, non_writable_files, non_writable_list)
        """
        exclude_files = exclude_files or []
        total_files = 0
        non_writable_files = 0
        non_writable_list = []

        if recursive:
            # Walk through all files in the directory tree recursively
            for root, dirs, files in os.walk(directory):
                for file in files:
                    file_path = os.path.join(root, file)
                    # Skip symbolic links
                    if os.path.islink(file_path):
                        continue
                    total_files += 1
                    if not self._is_effectively_writable(file_path):
                        non_writable_files += 1
                        rel_path = os.path.relpath(file_path, directory)
                        non_writable_list.append(rel_path)
        else:
            # Only check files in the immediate directory (non-recursive)
            for item in os.listdir(directory):
                if item in exclude_files:
                    continue
                item_path = os.path.join(directory, item)
                # Skip symbolic links and only check regular files
                if os.path.isfile(item_path) and not os.path.islink(item_path):
                    total_files += 1
                    try:
                        if not self._is_effectively_writable(item_path):
                            non_writable_files += 1
                            non_writable_list.append(item)
                    except Exception:
                        non_writable_files += 1
                        non_writable_list.append(item)

        return total_files, non_writable_files, non_writable_list

    def _create_file_count_description(
        self, total_files: int, non_writable_files: int, context: str = "files"
    ) -> Tuple[str, NodeStatus]:
        """Create description and status for file count results"""
        if total_files == 0:
            return f"writable, no {context} found", NodeStatus.INFO
        elif non_writable_files == 0:
            return f"writable, all {total_files} {context} writable", NodeStatus.OK
        else:
            return (
                f"writable, {non_writable_files} of {total_files} {context} not writable",
                NodeStatus.WARNING,
            )

    def _get_cargo_target_path_candidates(self) -> List[str]:
        """Get candidate paths for cargo target directory"""
        candidates = []

        # Try to get target directory from cargo metadata (most accurate)
        try:
            result = subprocess.run(
                ["cargo", "metadata", "--format-version=1", "--no-deps"],
                capture_output=True,
                text=True,
                timeout=10,
                cwd=".",
            )
            if result.returncode == 0:
                import json

                metadata = json.loads(result.stdout)
                target_path = metadata.get("target_directory")
                if target_path:
                    candidates.append(target_path)
        except Exception:
            pass

        # Add fallback candidates
        cargo_target = os.environ.get("CARGO_TARGET_DIR")
        if cargo_target:
            candidates.append(cargo_target)

        candidates.append("~/.cargo/target")
        return candidates

    def _check_dynamo_directory_permissions(self):
        """Check top-level dynamo directory and key files writability"""
        # Use the existing workspace detection logic
        dynamo_root = DynamoInfo.find_workspace()

        if not dynamo_root:
            # In runtime check mode, workspace not being found is expected
            if self.runtime_check:
                self.add_child(
                    NodeInfo(
                        label="Dynamo workspace",
                        desc="workspace not found (runtime check does not require a checkout)",
                        status=NodeStatus.WARNING,
                    )
                )
            else:
                self.add_child(
                    NodeInfo(
                        label="Dynamo workspace",
                        desc="workspace not found",
                        status=NodeStatus.ERROR,
                    )
                )
            return

        if not DynamoInfo.is_dynamo_workspace(dynamo_root):
            if self.runtime_check:
                self.add_child(
                    NodeInfo(
                        label="Dynamo workspace",
                        desc="not a valid dynamo workspace (runtime check does not require a checkout)",
                        status=NodeStatus.WARNING,
                    )
                )
                return
            self.add_child(
                NodeInfo(
                    label="Dynamo workspace",
                    desc="not a valid dynamo workspace",
                    status=NodeStatus.ERROR,
                )
            )
            return

        # Check dynamo root directory and files (exclude .git)
        recursive = self.thorough_check
        results = self._check_permissions_unified(
            [dynamo_root],
            "Dynamo workspace",
            recursive=recursive,
            exclude_files=[".git"],
        )
        for result in results:
            if self.runtime_check and result.status == NodeStatus.ERROR:
                result.status = NodeStatus.WARNING
            self.add_child(result)

        # Check .git directory separately
        git_dir = os.path.join(dynamo_root, ".git")
        if os.path.exists(git_dir):
            git_results = self._check_permissions_unified(
                [git_dir], "Dynamo .git directory", recursive=recursive
            )
            for result in git_results:
                if self.runtime_check and result.status == NodeStatus.ERROR:
                    result.status = NodeStatus.WARNING
                self.add_child(result)
        else:
            self.add_child(
                NodeInfo(
                    label="Dynamo .git directory",
                    desc="not available",
                    status=NodeStatus.WARNING,
                )
            )

    def _check_site_packages_permissions(self):
        """Check site-packages directory writability

        Logic:
        - If running in a virtualenv and its site-packages is writable: PASS
          (system site-packages being read-only is expected and shown as WARNING)
        - If no virtualenv and no writable site-packages: ERROR
          (can't install packages anywhere)
        """
        try:
            import site

            # Get all candidate site-packages directories
            site_packages_dirs = site.getsitepackages()
            user_site = site.getusersitepackages()
            if user_site:
                site_packages_dirs.append(user_site)

            # First pass: check which directories are writable
            writable_dirs = []
            all_results = []
            recursive = self.thorough_check

            for site_dir in site_packages_dirs:
                if os.path.exists(site_dir):
                    results = self._check_permissions_unified(
                        [site_dir], "site-packages", recursive=recursive
                    )
                    all_results.append((site_dir, results))

                    # Check if this directory is writable
                    if results and results[0].status == NodeStatus.OK:
                        writable_dirs.append(site_dir)

            # Determine if we have at least one writable site-packages
            has_writable_site_packages = len(writable_dirs) > 0

            # Second pass: add results with adjusted status
            for site_dir, results in all_results:
                for result in results:
                    # If we have at least one writable site-packages,
                    # downgrade ERROR to WARNING for non-writable ones
                    if (
                        has_writable_site_packages or self.runtime_check
                    ) and result.status == NodeStatus.ERROR:
                        result.status = NodeStatus.WARNING
                    self.add_child(result)

        except Exception as e:
            status = NodeStatus.WARNING if self.runtime_check else NodeStatus.ERROR
            self.add_child(
                NodeInfo(
                    label="Python site-packages",
                    desc=f"Permission check failed: {str(e)}",
                    status=status,
                )
            )

    def _check_cargo_target_permissions(self):
        """Check Cargo target directory writability and file permissions"""
        candidates = self._get_cargo_target_path_candidates()
        recursive = self.thorough_check
        results = self._check_permissions_unified(
            candidates, "Cargo target", recursive=recursive
        )

        if not results or (
            len(results) == 1
            and results[0].status == NodeStatus.ERROR
            and results[0].desc is not None
            and "No candidate paths exist" in results[0].desc
        ):
            # No paths exist - show warning instead of error
            self.add_child(
                NodeInfo(
                    label="Cargo target",
                    desc="Path does not exist",
                    status=NodeStatus.WARNING,
                )
            )
        else:
            for result in results:
                self.add_child(result)

    def _check_rust_toolchain_permissions(self):
        """Check RUSTUP_HOME and CARGO_HOME directory writability

        These directories need recursive checking because:
        - RUSTUP_HOME: rustup needs to write toolchain files, documentation, etc.
        - CARGO_HOME: cargo needs to write registry cache, git repos, binaries, etc.
        """
        # Check RUSTUP_HOME
        rustup_env = os.environ.get("RUSTUP_HOME")
        rustup_candidates = [rustup_env] if rustup_env is not None else []
        rustup_candidates.append("~/.rustup")

        recursive = self.thorough_check
        rustup_results = self._check_permissions_unified(
            rustup_candidates, "Rustup home", recursive=recursive
        )
        for result in rustup_results:
            self.add_child(result)

        # Check CARGO_HOME
        cargo_env = os.environ.get("CARGO_HOME")
        cargo_candidates = [cargo_env] if cargo_env is not None else []
        cargo_candidates.append("~/.cargo")

        cargo_results = self._check_permissions_unified(
            cargo_candidates, "Cargo home", recursive=recursive
        )
        for result in cargo_results:
            self.add_child(result)

    def _format_disk_space(self, path: str) -> Tuple[str, Optional[NodeStatus]]:
        """Format disk space information for a given path

        Returns:
            Tuple of (formatted_string, warning_status_if_low_space)
        """
        try:
            # Get disk usage statistics
            statvfs = os.statvfs(path)

            # Calculate sizes in bytes
            total_bytes = statvfs.f_frsize * statvfs.f_blocks
            free_bytes = statvfs.f_frsize * statvfs.f_bavail
            used_bytes = total_bytes - free_bytes

            # Convert to human readable format
            def format_bytes(bytes_val):
                """Convert bytes to human readable format"""
                for unit in ["B", "KB", "MB", "GB", "TB"]:
                    if bytes_val < 1024.0:
                        return f"{bytes_val:.1f} {unit}"
                    bytes_val /= 1024.0
                return f"{bytes_val:.1f} PB"

            # Calculate percentage used
            percent_used = (used_bytes / total_bytes) * 100
            percent_free = 100 - percent_used

            formatted_string = f", {format_bytes(used_bytes)}/{format_bytes(total_bytes)} ({percent_used:.1f}% used)"

            # Return warning status if less than 10% free space
            warning_status = NodeStatus.WARNING if percent_free < 10 else None

            return formatted_string, warning_status

        except Exception:
            return "", None


class HuggingFaceInfo(NodeInfo):
    """Hugging Face models cache information (follows standalone requirement)

    HARD-CODED PATH: ~/.cache/huggingface/hub

    ENV VARIABLES (checked by HuggingFace transformers library, not this tool):
    - HF_HOME: Base directory for Hugging Face cache
    - HUGGINGFACE_HUB_CACHE: Direct path to hub cache
    - HF_TOKEN: Authentication token (checked and displayed if set)

    This class directly uses ~/.cache/huggingface/hub instead of reading environment
    variables because this tool must work reliably in all environments, including when
    environment variables are misconfigured or not set. For dynamic configuration that
    respects all HF environment variables, use dynamo.common.config_dump at runtime.
    """

    def __init__(self, thorough_check: bool = False):
        # HARD-CODED PATH: ~/.cache/huggingface/hub (not reading HF_HOME or HUGGINGFACE_HUB_CACHE)
        hf_cache_path = os.path.expanduser("~/.cache/huggingface/hub")

        if os.path.exists(hf_cache_path):
            models = self._get_cached_models(
                hf_cache_path, compute_sizes=thorough_check
            )
            if models:
                self._init_with_models(hf_cache_path, models, thorough_check)
            else:
                self._init_no_models_found(hf_cache_path)
        else:
            self._init_cache_not_available()

        # Add HF_TOKEN info if set (common to all cases)
        self._add_hf_token_info()

    def _init_with_models(
        self, hf_cache_path: str, models: List[tuple], thorough_check: bool
    ):
        """Initialize when models are found in cache."""
        model_count = len(models)
        display_path = self._replace_home_with_var(hf_cache_path)
        super().__init__(
            label="Hugging Face Cache",
            desc=f"{model_count} models in {display_path}",
            status=NodeStatus.OK,
        )

        # Only show detailed model list in thorough mode
        if thorough_check:
            self._add_model_details(models)

    def _init_no_models_found(self, hf_cache_path: str):
        """Initialize when cache exists but no models found."""
        display_path = self._replace_home_with_var(hf_cache_path)
        super().__init__(
            label="Hugging Face Cache",
            desc=f"directory exists but no models found in {display_path}",
            status=NodeStatus.WARNING,
        )

    def _init_cache_not_available(self):
        """Initialize when cache directory doesn't exist."""
        super().__init__(
            label="Hugging Face Cache",
            desc="~/.cache/huggingface/hub not available",
            status=NodeStatus.WARNING,
        )

    def _add_model_details(self, models: List[tuple]):
        """Add detailed model information as child nodes."""
        # Add all models as children (no limit)
        for i, model_info in enumerate(models):
            model_name, download_date, size_str = model_info
            model_node = NodeInfo(
                label=f"Model {i+1}",
                desc=f"{model_name}, downloaded={download_date}, size={size_str}",
                status=NodeStatus.INFO,
            )
            self.add_child(model_node)

    def _add_hf_token_info(self):
        """Add HF_TOKEN information if the environment variable is set."""
        if os.environ.get("HF_TOKEN"):
            token_node = NodeInfo(
                label="HF_TOKEN",
                desc="<set>",
                status=NodeStatus.INFO,
            )
            self.add_child(token_node)

    def _get_cached_models(self, cache_path: str, compute_sizes: bool) -> List[tuple]:
        """Get list of cached Hugging Face models with metadata.

        Args:
            cache_path: Path to HuggingFace cache directory
            compute_sizes: Whether to compute directory sizes (slow operation)

        Returns:
            List of tuples: (model_name, download_date, size_str)
        """
        models = []
        try:
            if os.path.exists(cache_path):
                for item in os.listdir(cache_path):
                    item_path = os.path.join(cache_path, item)
                    # Only count model repos; ignore datasets--, spaces--, blobs, etc.
                    if not (os.path.isdir(item_path) and item.startswith("models--")):
                        continue
                    # Convert "models--org--repo-name" to "org/repo-name"
                    parts = item.split("--")
                    if len(parts) >= 3:
                        org = parts[1]
                        model_name = "--".join(parts[2:])  # Preserve dashes
                        display_name = f"{org}/{model_name}"
                    else:
                        display_name = item  # Fallback to raw dir name

                    # Get download date (directory creation/modification time)
                    try:
                        stat_info = os.stat(item_path)
                        # Use the earlier of creation time or modification time
                        download_time = min(stat_info.st_ctime, stat_info.st_mtime)
                        download_date = self._format_timestamp_pdt(download_time)
                    except Exception:
                        download_date = "unknown"

                    # Get directory size (only when requested)
                    size_str = "-"
                    if compute_sizes:
                        try:
                            size_bytes = self._get_directory_size_bytes(item_path)
                            size_str = self._format_size(size_bytes)
                        except Exception:
                            size_str = "unknown"

                    models.append((display_name, download_date, size_str))
        except Exception:
            pass

        # Sort by model name
        return sorted(models, key=lambda x: x[0])

    def _get_directory_size_bytes(self, directory: str) -> int:
        """Get the total size of a directory in bytes."""
        total_size = 0
        try:
            for dirpath, dirnames, filenames in os.walk(directory):
                for filename in filenames:
                    filepath = os.path.join(dirpath, filename)
                    try:
                        if not os.path.islink(filepath):  # Skip symbolic links
                            total_size += os.path.getsize(filepath)
                    except (OSError, FileNotFoundError):
                        pass  # Skip files that can't be accessed
        except Exception:
            pass
        return total_size

    def _format_size(self, size_bytes: int) -> str:
        """Format size in bytes to human readable format."""
        if size_bytes == 0:
            return "0 B"

        units = ["B", "KB", "MB", "GB", "TB"]
        size = float(size_bytes)
        unit_index = 0

        while size >= 1024.0 and unit_index < len(units) - 1:
            size /= 1024.0
            unit_index += 1

        # Format with appropriate precision
        if unit_index == 0:  # Bytes
            return f"{int(size)} {units[unit_index]}"
        elif size >= 100:
            return f"{size:.0f} {units[unit_index]}"
        elif size >= 10:
            return f"{size:.1f} {units[unit_index]}"
        else:
            return f"{size:.2f} {units[unit_index]}"


class CargoInfo(NodeInfo):
    """Cargo tool information"""

    def __init__(self, thorough_check: bool = False):
        self.thorough_check = thorough_check
        cargo_path = shutil.which("cargo")
        cargo_version = None

        # Get cargo version
        if cargo_path:
            try:
                result = subprocess.run(
                    ["cargo", "--version"], capture_output=True, text=True, timeout=5
                )
                if result.returncode == 0:
                    cargo_version = result.stdout.strip()
            except Exception:
                pass

        if not cargo_path and not cargo_version:
            super().__init__(
                label="Cargo",
                desc="not found, install Rust toolchain to see cargo target directory",
                status=NodeStatus.ERROR,
            )
            return

        # Initialize with cargo path and version
        value = ""
        if cargo_path:
            value = self._replace_home_with_var(cargo_path)
        if cargo_version:
            value += f", {cargo_version}" if value else cargo_version

        super().__init__(label="Cargo", desc=value, status=NodeStatus.OK)

        # Get cargo home directory from the environment (may not exist, which is OK)
        cargo_home_env = os.environ.get("CARGO_HOME")
        if cargo_home_env:
            cargo_home = cargo_home_env
            home_value = f"CARGO_HOME={self._replace_home_with_var(cargo_home)}"
        else:
            cargo_home = os.path.expanduser("~/.cargo")
            home_value = (
                f"CARGO_HOME=<not set>, using {self._replace_home_with_var(cargo_home)}"
            )

        if cargo_home and os.path.exists(cargo_home):
            status = NodeStatus.INFO
        else:
            home_value += " (directory does not exist)"
            status = NodeStatus.WARNING

        home_node = NodeInfo(
            label="Cargo home directory", desc=home_value, status=status
        )
        self.add_child(home_node)

        # Get cargo target directory
        cargo_target_env = os.environ.get("CARGO_TARGET_DIR")
        cargo_target = self._get_cargo_target_directory()

        # Calculate total directory size (only if thorough check and directory exists)
        size_str = ""
        if cargo_target and os.path.exists(cargo_target) and self.thorough_check:
            total_size_gb = self._get_directory_size_gb(cargo_target)
            size_str = f", {total_size_gb:.1f} GB" if total_size_gb is not None else ""

        # Format the display value
        if cargo_target_env:
            display_cargo_target = (
                self._replace_home_with_var(cargo_target) if cargo_target else "unknown"
            )
            target_value = f"CARGO_TARGET_DIR={display_cargo_target}{size_str}"
        else:
            display_cargo_target = (
                self._replace_home_with_var(cargo_target) if cargo_target else "unknown"
            )
            target_value = (
                f"CARGO_TARGET_DIR=<not set>, using {display_cargo_target}{size_str}"
            )

        # Check directory existence and set status
        if cargo_target and os.path.exists(cargo_target):
            status = NodeStatus.INFO
            target_node = NodeInfo(
                label="Cargo target directory",
                desc=target_value,
                status=status,
            )
            self.add_child(target_node)
            # Add debug/release/binary info as children of target directory
            self._add_build_info(target_node, cargo_target)
        else:
            target_value += " (directory does not exist)"
            status = NodeStatus.WARNING if cargo_target_env else NodeStatus.INFO
            target_node = NodeInfo(
                label="Cargo target directory",
                desc=target_value,
                status=status,
            )
            self.add_child(target_node)

    def _get_directory_size_gb(self, directory: str) -> Optional[float]:
        """Get the size of a directory in GB."""
        try:
            # Use du command to get directory size in bytes
            result = subprocess.run(
                ["du", "-sb", directory], capture_output=True, text=True, timeout=30
            )
            if result.returncode == 0:
                # Parse output: "size_in_bytes\tdirectory_path"
                size_bytes = int(result.stdout.split()[0])
                # Convert to GB
                size_gb = size_bytes / (1024**3)
                return size_gb
        except Exception:
            pass
        return None

    def _get_cargo_target_directory(self) -> Optional[str]:
        """Get cargo target directory using cargo metadata."""
        try:
            # Use DynamoInfo's static method to find workspace
            workspace_dir = DynamoInfo.find_workspace()

            # Run cargo metadata command to get target directory
            cmd_args = ["cargo", "metadata", "--format-version=1", "--no-deps"]
            kwargs: Dict[str, Any] = {
                "capture_output": True,
                "text": True,
                "timeout": 10,
            }

            # Add cwd if workspace_dir was found
            if workspace_dir and os.path.isdir(workspace_dir):
                kwargs["cwd"] = workspace_dir

            result = subprocess.run(cmd_args, **kwargs)

            if result.returncode == 0:
                # Parse JSON output to extract target_directory
                metadata = json.loads(result.stdout)
                return metadata.get("target_directory")
        except Exception:
            pass
        return None

    def _add_build_info(self, parent_node: NodeInfo, cargo_target: str):
        """Add debug/release/binary information as children of target directory."""
        debug_dir = os.path.join(cargo_target, "debug")
        release_dir = os.path.join(cargo_target, "release")

        # Check debug directory
        if os.path.exists(debug_dir):
            display_debug = self._replace_home_with_var(debug_dir)
            debug_value = display_debug

            # Add size (only if thorough check)
            if self.thorough_check:
                debug_size_gb = self._get_directory_size_gb(debug_dir)
                if debug_size_gb is not None:
                    debug_value += f", {debug_size_gb:.1f} GB"

            try:
                debug_mtime = os.path.getmtime(debug_dir)
                debug_time = self._format_timestamp_pdt(debug_mtime)
                debug_value += f", modified={debug_time}"
            except Exception:
                debug_value += " (unable to read timestamp)"

            debug_node = NodeInfo(
                label="Debug", desc=debug_value, status=NodeStatus.INFO
            )
            parent_node.add_child(debug_node)

        # Check release directory
        if os.path.exists(release_dir):
            display_release = self._replace_home_with_var(release_dir)
            release_value = display_release

            # Add size (only if thorough check)
            if self.thorough_check:
                release_size_gb = self._get_directory_size_gb(release_dir)
                if release_size_gb is not None:
                    release_value += f", {release_size_gb:.1f} GB"

            try:
                release_mtime = os.path.getmtime(release_dir)
                release_time = self._format_timestamp_pdt(release_mtime)
                release_value += f", modified={release_time}"
            except Exception:
                release_value += " (unable to read timestamp)"

            release_node = NodeInfo(
                label="Release", desc=release_value, status=NodeStatus.INFO
            )
            parent_node.add_child(release_node)

        # Find *.so file
        so_file = self._find_so_file(cargo_target)
        if so_file:
            display_so = self._replace_home_with_var(so_file)
            so_value = display_so

            # Add file size (only if thorough check)
            if self.thorough_check:
                try:
                    file_size_bytes = os.path.getsize(so_file)
                    file_size_mb = file_size_bytes / (1024**2)
                    so_value += f", {file_size_mb:.1f} MB"
                except Exception:
                    pass

            try:
                so_mtime = os.path.getmtime(so_file)
                so_time = self._format_timestamp_pdt(so_mtime)
                so_value += f", modified={so_time}"
            except Exception:
                so_value += " (unable to read timestamp)"

            binary_node = NodeInfo(
                label="Binary", desc=so_value, status=NodeStatus.INFO
            )
            parent_node.add_child(binary_node)

    def _find_so_file(self, target_directory: str) -> Optional[str]:
        """Find the compiled *.so file in target directory."""
        # Check common locations for .so files
        search_dirs = [
            os.path.join(target_directory, "debug"),
            os.path.join(target_directory, "release"),
            target_directory,
        ]

        for search_dir in search_dirs:
            if not os.path.exists(search_dir):
                continue

            # Walk through directory looking for .so files
            try:
                for root, dirs, files in os.walk(search_dir):
                    for file in files:
                        if file.endswith(".so"):
                            return os.path.join(root, file)
                    # Don't recurse too deep
                    if root.count(os.sep) - search_dir.count(os.sep) > 2:
                        dirs[:] = []  # Stop recursion
            except Exception:
                pass

        return None


class MaturinInfo(NodeInfo):
    """Maturin tool information (Python-Rust build tool)"""

    def __init__(self):
        maturin_path = shutil.which("maturin")
        if not maturin_path:
            super().__init__(label="Maturin", desc="not found", status=NodeStatus.ERROR)
            # Add installation hint as a child node
            install_hint = NodeInfo(
                label="Install with",
                desc="uv pip install maturin[patchelf]",
                status=NodeStatus.INFO,
            )
            self.add_child(install_hint)
            return

        try:
            result = subprocess.run(
                ["maturin", "--version"], capture_output=True, text=True, timeout=5
            )
            if result.returncode == 0:
                version = result.stdout.strip()
                # Include the maturin binary path like Cargo and Git do
                display_maturin_path = self._replace_home_with_var(maturin_path)
                super().__init__(
                    label="Maturin",
                    desc=f"{display_maturin_path}, {version}",
                    status=NodeStatus.OK,
                )
                return
        except Exception:
            pass

        super().__init__(label="Maturin", desc="not found", status=NodeStatus.ERROR)


class PythonInfo(NodeInfo):
    """Python installation information.

    In `--runtime-check` mode, Python is still useful to report, but failures should not
    block the container sanity check, so missing/broken Python is downgraded to WARNING.
    """

    def __init__(self, runtime_check: bool = False):
        self.runtime_check = runtime_check
        py_version = platform.python_version()
        py_exec = sys.executable or "python"
        display_py_exec = self._replace_home_with_var(py_exec)

        if os.path.exists(py_exec):
            status = NodeStatus.OK
        else:
            status = NodeStatus.WARNING if self.runtime_check else NodeStatus.ERROR

        super().__init__(
            label="Python",
            desc=f"{py_version}, {display_py_exec}",
            status=status,
        )

        # Check for PyTorch (optional)
        try:
            torch = __import__("torch")
            version = getattr(torch, "__version__", "installed")

            # Check CUDA availability
            cuda_status = None
            if hasattr(torch, "cuda"):
                try:
                    cuda_available = torch.cuda.is_available()
                    cuda_status = (
                        "✅torch.cuda.is_available"
                        if cuda_available
                        else "❌torch.cuda.is_available"
                    )
                except Exception:
                    pass

            # Get installation path
            install_path = None
            if hasattr(torch, "__file__") and torch.__file__:
                file_path = torch.__file__
                if "site-packages" in file_path:
                    parts = file_path.split(os.sep)
                    for i, part in enumerate(parts):
                        if part == "site-packages":
                            install_path = os.sep.join(parts[: i + 1])
                            break
                elif file_path:
                    install_path = os.path.dirname(file_path)

                if install_path:
                    install_path = self._replace_home_with_var(install_path)

            package_info = PythonPackageInfo(
                package_name="PyTorch",
                version=version,
                cuda_status=cuda_status,
                install_path=install_path,
                is_framework=False,
            )
            self.add_child(package_info)
        except ImportError:
            pass  # PyTorch is optional, don't show if not installed

        # Add PYTHONPATH
        pythonpath = os.environ.get("PYTHONPATH", "")
        self.add_child(PythonPathInfo(pythonpath))


class FrameworkInfo(NodeInfo):
    """LLM Framework information"""

    def __init__(self, no_framework_check: bool = False):
        super().__init__(label="🤖Framework", status=NodeStatus.INFO)

        if no_framework_check:
            # Why: In some environments (CI, minimal runtime containers) we may want to
            # validate the Dynamo install without requiring a framework/engine package
            # (vllm/sglang/tensorrt_llm) to be present.
            self.desc = "skipped (--no-framework-check)"
            return

        # Check for framework packages (mandatory to show)
        frameworks_to_check = [
            ("vllm", "vLLM"),
            ("sglang", "Sglang"),
            ("tensorrt_llm", "tensorRT LLM"),
        ]

        frameworks_found = 0
        gpu_dependent_found = 0

        for module_name, display_name in frameworks_to_check:
            # First check if module exists without importing (for GPU-dependent modules)
            import importlib.metadata
            import importlib.util

            spec = importlib.util.find_spec(module_name)
            if not spec:
                # Module not installed at all
                continue

            # Module exists, try to get version from metadata (doesn't require import)
            version = None
            try:
                version = importlib.metadata.version(module_name)
            except Exception:
                # Try alternative package names
                alt_names = {
                    "tensorrt_llm": "tensorrt-llm",
                    "sglang": "sglang",
                    "vllm": "vllm",
                }
                if module_name in alt_names:
                    try:
                        version = importlib.metadata.version(alt_names[module_name])
                    except Exception:
                        pass

            # Get module path from spec
            module_path = None
            if spec.origin:
                module_path = self._replace_home_with_var(spec.origin)

            # Get executable path (special handling for each framework)
            exec_path = None
            exec_names = {
                "vllm": "vllm",
                "sglang": "sglang",
                "tensorrt_llm": "trtllm-build",
            }
            if module_name in exec_names:
                exec_path_raw = shutil.which(exec_names[module_name])
                if exec_path_raw:
                    exec_path = self._replace_home_with_var(exec_path_raw)

            # Now try to import to get runtime version if needed
            gpu_required = False
            try:
                module = __import__(module_name)
                # Get version from module if not already found
                if not version:
                    version = getattr(module, "__version__", "installed")
            except ImportError as e:
                # Check if it's a GPU-related error
                error_msg = str(e).lower()
                if "libcuda" in error_msg or "cuda" in error_msg:
                    gpu_required = True
                    gpu_dependent_found += 1
            except Exception:
                pass

            # If we found the module (either importable or just installed)
            if spec:
                frameworks_found += 1
                if not version:
                    version = "installed"

                # Add status indicator to version for GPU-dependent modules
                if gpu_required:
                    version = f"{version} (requires GPU)"

                package_info = PythonPackageInfo(
                    package_name=display_name,
                    version=version,
                    module_path=module_path,
                    exec_path=exec_path,
                    is_framework=True,
                    is_installed=True,
                )
                self.add_child(package_info)

        # If no frameworks found, set status to ERROR (X) and show what's missing
        if frameworks_found == 0:
            self.status = NodeStatus.ERROR
            # List all the frameworks that were checked but not found
            missing_frameworks = []
            for module_name, display_name in frameworks_to_check:
                missing_frameworks.append(f"no {module_name}")
            missing_text = ", ".join(missing_frameworks)
            self.desc = missing_text
        elif gpu_dependent_found > 0:
            # At least one framework needs GPU
            self.status = NodeStatus.WARNING


class PythonPackageInfo(NodeInfo):
    """Python package information"""

    def __init__(
        self,
        package_name: str,
        version: str,
        cuda_status: Optional[str] = None,
        module_path: Optional[str] = None,
        exec_path: Optional[str] = None,
        install_path: Optional[str] = None,
        is_framework: bool = False,
        is_installed: bool = True,
    ):
        # Build display value
        display_value = version

        # Determine status based on whether package is installed
        if not is_installed or version == "-":
            # Framework not found - show with "-" and use UNKNOWN status for ❓ symbol
            display_value = "-"
            status = NodeStatus.UNKNOWN  # Show ❓ for not found frameworks
        else:
            status = NodeStatus.OK

            # Add CUDA status for PyTorch
            if cuda_status:
                display_value = f"{version}, {cuda_status}"
                # Don't add install path for PyTorch with CUDA status
            # For frameworks, add module and exec paths
            elif is_framework and (module_path or exec_path):
                parts = [version]
                if module_path:
                    parts.append(f"module={module_path}")
                if exec_path:
                    parts.append(f"exec={exec_path}")
                display_value = ", ".join(parts)
            # For regular packages, add install path
            elif install_path:
                display_value = f"{version} ({install_path})"

        super().__init__(label=package_name, desc=display_value, status=status)


class PythonPathInfo(NodeInfo):
    """PYTHONPATH environment variable information"""

    def __init__(self, pythonpath: str):
        if pythonpath:
            # Split by colon and replace home in each path
            paths = pythonpath.split(":")
            display_paths = []
            has_invalid_paths = False

            for p in paths:
                display_path = self._replace_home_with_var(p)
                # Check if path exists and is accessible
                if not os.path.exists(p) or not os.access(p, os.R_OK):
                    display_paths.append(
                        f"{Colors.BRIGHT_RED}{display_path}{Colors.RESET}"
                    )  # Bright red path
                    has_invalid_paths = True
                else:
                    display_paths.append(display_path)

            display_pythonpath = ":".join(display_paths)
            status = NodeStatus.WARNING if has_invalid_paths else NodeStatus.INFO
        else:
            display_pythonpath = "not set"
            status = (
                NodeStatus.INFO
            )  # PYTHONPATH not set is fine with editable installs

        super().__init__(label="PYTHONPATH", desc=display_pythonpath, status=status)


class DynamoRuntimeInfo(NodeInfo):
    """Dynamo runtime components information"""

    def __init__(
        self,
        workspace_dir: Optional[str],
        thorough_check: bool = False,
        runtime_check: bool = False,
    ):
        self.thorough_check = thorough_check
        self.runtime_check = runtime_check
        # Try to get package version
        import importlib.metadata

        try:
            version = importlib.metadata.version("ai-dynamo-runtime")
            runtime_value = f"ai-dynamo-runtime {version}"
            is_installed = True
        except Exception:
            runtime_value = "ai-dynamo-runtime - Not installed"
            is_installed = False

        super().__init__(
            label="Runtime components",
            desc=runtime_value,
            status=NodeStatus.INFO,  # Will update based on components found
        )

        # Add package info if installed
        if is_installed:
            # Add dist-info directory
            dist_info = self._find_dist_info()
            if dist_info:
                self.add_child(dist_info)

            # Add .pth file
            pth_file = self._find_pth_file()
            if pth_file:
                self.add_child(pth_file)

        # Check for multiple _core*.so files (only if workspace exists)
        if workspace_dir:
            multiple_so_warning = self._check_multiple_core_so(workspace_dir)
            if multiple_so_warning:
                self.add_child(multiple_so_warning)

        # Discover runtime components from source
        components = self._discover_runtime_components(workspace_dir)

        # For runtime check, always try to import the core modules
        if self.runtime_check:
            # Force check of essential runtime modules
            essential_components = ["dynamo._core", "dynamo.runtime"]
            for comp in essential_components:
                if comp not in components:
                    components.append(comp)

        # Find where each component actually is and add them
        if components:
            # Calculate max width for alignment
            max_len = max(len(comp) for comp in components)

            components_found = False
            import_failures = []
            for component in components:
                try:
                    # Try to import to find actual location
                    module = __import__(component, fromlist=[""])
                    module_path = getattr(module, "__file__", None)

                    if module_path:
                        # Add timestamp for .so files
                        timestamp_str = ""
                        if module_path.endswith(".so"):
                            try:
                                stat = os.stat(module_path)
                                timestamp = self._format_timestamp_pdt(stat.st_mtime)
                                timestamp_str = f", modified={timestamp}"
                            except Exception:
                                pass

                        display_path = self._replace_home_with_var(module_path)
                        padded_name = f"{component:<{max_len}}"
                        module_node = NodeInfo(
                            label=f"✅ {padded_name}",
                            desc=f"{display_path}{timestamp_str}",
                            status=NodeStatus.NONE,
                        )
                        self.add_child(module_node)
                        components_found = True
                except ImportError as e:
                    # Module not importable - show as error
                    padded_name = f"{component:<{max_len}}"
                    error_msg = str(e) if str(e) else "Import failed"
                    module_node = NodeInfo(
                        label=padded_name, desc=error_msg, status=NodeStatus.ERROR
                    )
                    self.add_child(module_node)
                    import_failures.append(component)
                    # Don't set components_found to True for failed imports

            # Update status and value based on whether we found components
            if components_found:
                # For runtime check, fail if any essential component failed to import
                if self.runtime_check and import_failures:
                    essential_failed = any(
                        comp in import_failures
                        for comp in ["dynamo._core", "dynamo.runtime"]
                    )
                    if essential_failed:
                        self.status = NodeStatus.ERROR
                        self.desc = "ai-dynamo-runtime - FAILED (essential modules not importable)"
                    else:
                        self.status = NodeStatus.OK
                else:
                    self.status = NodeStatus.OK
                # If not installed but components work via PYTHONPATH, update the message
                if not is_installed and self.status == NodeStatus.OK:
                    self.desc = "ai-dynamo-runtime (via PYTHONPATH)"
            else:
                self.status = NodeStatus.ERROR
                if self.runtime_check:
                    self.desc = "ai-dynamo-runtime - FAILED (no components found)"
        else:
            # No components discovered at all
            self.status = NodeStatus.ERROR

        # Final check: if no children at all (no components found), ensure it's an error
        if not self.children:
            self.status = NodeStatus.ERROR

    def _check_multiple_core_so(self, workspace_dir: str) -> Optional[NodeInfo]:
        """Check for multiple _core*.so files and return warning if found.

        Multiple _core*.so files are problematic because:
        - Python's import system picks up the first matching file it finds
        - This can lead to loading the wrong/outdated binary module
        - Different naming patterns (_core.abi3.so vs _core.cpython-312-x86_64-linux-gnu.so)
          indicate different build configurations which shouldn't coexist
        - Can cause confusing import errors when the wrong .so is loaded
        - Typically occurs when switching between maturin build modes or Python versions

        Returns:
            NodeInfo with warning if multiple .so files found, None otherwise
        """
        if not workspace_dir:
            return None

        core_dir = os.path.join(workspace_dir, DYNAMO_RUNTIME_SRC_PATH)
        if not os.path.exists(core_dir):
            return None

        try:
            # Find all _core*.so files
            so_files = glob.glob(os.path.join(core_dir, "_core*.so"))

            if len(so_files) > 1:
                # Multiple .so files found - create warning
                so_file_names = [os.path.basename(f) for f in so_files]
                warning_desc = (
                    f"Found {len(so_files)} files: {', '.join(so_file_names)}. "
                    f"Python may load the wrong version causing import errors. "
                    f"You may need to remove old *.so files and/or rebuild via 'maturin develop'."
                )
                return NodeInfo(
                    label="Multiple _core*.so files detected",
                    desc=warning_desc,
                    status=NodeStatus.WARNING,
                )
        except Exception:
            pass

        return None

    def _discover_runtime_components(self, workspace_dir: Optional[str]) -> list:
        """Discover ai-dynamo-runtime components from filesystem.

        Returns:
            List of runtime component module names
            Example: ['dynamo._core', 'dynamo.nixl_connect', 'dynamo.llm', 'dynamo.runtime']

        Note: Always includes 'dynamo._core' (compiled Rust module), then scans
              DYNAMO_RUNTIME_SRC_PATH for additional components.
        """
        components = ["dynamo._core"]  # Always include compiled Rust module

        if not workspace_dir:
            return components

        # Scan runtime components (llm, runtime, nixl_connect, etc.)
        runtime_path = os.path.join(workspace_dir, DYNAMO_RUNTIME_SRC_PATH)
        if not os.path.exists(runtime_path):
            return components

        for item in os.listdir(runtime_path):
            item_path = os.path.join(runtime_path, item)
            if os.path.isdir(item_path) and os.path.exists(
                os.path.join(item_path, "__init__.py")
            ):
                components.append(f"dynamo.{item}")

        return components

    def _find_dist_info(self) -> Optional[NodeInfo]:
        """Find the dist-info directory for ai-dynamo-runtime."""
        import site

        for site_dir in site.getsitepackages():
            pattern = os.path.join(site_dir, "ai_dynamo_runtime*.dist-info")
            matches = glob.glob(pattern)
            if matches:
                path = matches[0]
                display_path = self._replace_home_with_var(path)
                try:
                    stat = os.stat(path)
                    timestamp = self._format_timestamp_pdt(stat.st_ctime)
                    return NodeInfo(
                        label=f" {display_path}",
                        desc=f"created={timestamp}",
                        status=NodeStatus.INFO,
                        metadata={"part_of_previous": True},
                    )
                except Exception:
                    return NodeInfo(
                        label=f" {display_path}",
                        status=NodeStatus.INFO,
                        metadata={"part_of_previous": True},
                    )
        return None

    def _find_pth_file(self) -> Optional[NodeInfo]:
        """Find the .pth file for ai-dynamo-runtime."""
        import site

        for site_dir in site.getsitepackages():
            pth_path = os.path.join(site_dir, "ai_dynamo_runtime.pth")
            if os.path.exists(pth_path):
                display_path = self._replace_home_with_var(pth_path)
                try:
                    stat = os.stat(pth_path)
                    timestamp = self._format_timestamp_pdt(stat.st_mtime)
                    node = NodeInfo(
                        label=f" {display_path}",
                        desc=f"modified={timestamp}",
                        status=NodeStatus.INFO,
                        metadata={"part_of_previous": True},
                    )

                    # Read where it points to
                    with open(pth_path, "r") as f:
                        content = f.read().strip()
                        if content:
                            display_content = self._replace_home_with_var(content)
                            points_to = NodeInfo(
                                label="→", desc=display_content, status=NodeStatus.INFO
                            )
                            node.add_child(points_to)

                    return node
                except Exception:
                    return NodeInfo(label=display_path, status=NodeStatus.INFO)
        return None


class DynamoFrameworkInfo(NodeInfo):
    """Dynamo framework components information"""

    def __init__(
        self,
        workspace_dir: Optional[str],
        thorough_check: bool = False,
        runtime_check: bool = False,
    ):
        self.thorough_check = thorough_check
        self.runtime_check = runtime_check
        # Try to get package version
        import importlib.metadata

        try:
            version = importlib.metadata.version("ai-dynamo")
            framework_value = f"ai-dynamo {version}"
            is_installed = True
        except Exception:
            framework_value = "ai-dynamo - Not installed"
            is_installed = False

        super().__init__(
            label="Framework components",
            desc=framework_value,
            status=NodeStatus.INFO,  # Will update based on components found
        )

        # Add package info if installed
        if is_installed:
            import glob
            import site

            for site_dir in site.getsitepackages():
                # Look specifically for ai_dynamo (not ai_dynamo_runtime)
                dist_pattern = os.path.join(site_dir, "ai_dynamo-*.dist-info")
                matches = glob.glob(dist_pattern)
                if matches:
                    path = matches[0]
                    display_path = self._replace_home_with_var(path)
                    try:
                        stat = os.stat(path)
                        timestamp = self._format_timestamp_pdt(stat.st_ctime)
                        dist_node = NodeInfo(
                            label=f" {display_path}",
                            desc=f"created={timestamp}",
                            status=NodeStatus.INFO,
                            metadata={"part_of_previous": True},
                        )
                        self.add_child(dist_node)
                    except Exception:
                        dist_node = NodeInfo(
                            label=f" {display_path}",
                            status=NodeStatus.INFO,
                            metadata={"part_of_previous": True},
                        )
                        self.add_child(dist_node)
                    break

        # Discover framework components from source
        components = self._discover_framework_components(workspace_dir)

        # For runtime check, always try to import at least one framework component
        if self.runtime_check and not components:
            # Try common framework components even if not discovered
            components = [
                "dynamo.frontend",
                "dynamo.vllm",
                "dynamo.sglang",
                "dynamo.trtllm",
            ]

        # Find where each component actually is and add them
        if components:
            # Sort components for consistent output
            components.sort()

            # Calculate max width for alignment
            max_len = max(len(comp) for comp in components)

            components_found = False
            import_failures = []
            for component in components:
                try:
                    # Try to import to find actual location
                    module = __import__(component, fromlist=[""])
                    module_path = getattr(module, "__file__", None)

                    if module_path:
                        display_path = self._replace_home_with_var(module_path)
                        padded_name = f"{component:<{max_len}}"
                        component_node = NodeInfo(
                            label=f"✅ {padded_name}",
                            desc=display_path,
                            status=NodeStatus.NONE,
                        )
                        self.add_child(component_node)
                        components_found = True
                except ImportError as e:
                    # Module not importable - show as error
                    padded_name = f"{component:<{max_len}}"
                    error_msg = str(e) if str(e) else "Import failed"
                    component_node = NodeInfo(
                        label=padded_name, desc=error_msg, status=NodeStatus.ERROR
                    )
                    self.add_child(component_node)
                    import_failures.append(component)
                    # Don't set components_found to True for failed imports

            # Update status and value based on whether we found components
            if components_found:
                # For runtime check, we need at least one component to work
                if self.runtime_check and len(import_failures) == len(components):
                    self.status = NodeStatus.ERROR
                    self.desc = "ai-dynamo - FAILED (no components importable)"
                else:
                    self.status = NodeStatus.OK
                # If not installed but components work via PYTHONPATH, update the message
                if not is_installed and self.status == NodeStatus.OK:
                    self.desc = "ai-dynamo (via PYTHONPATH)"
            else:
                self.status = NodeStatus.ERROR
                if self.runtime_check:
                    self.desc = "ai-dynamo - FAILED (no components found)"
        else:
            # No components discovered at all
            self.status = NodeStatus.ERROR

    def _discover_framework_components(self, workspace_dir: Optional[str]) -> list:
        """Discover ai-dynamo framework components from filesystem.

        Returns:
            List of framework component module names
            Example: ['dynamo.frontend', 'dynamo.planner', 'dynamo.vllm', 'dynamo.sglang']

        Note: Scans components/src/dynamo/... directory for modules with __init__.py files.
        """
        components: List[str] = []

        if not workspace_dir:
            return components

        # Scan the components/src/dynamo/... Python directory for __init__.py files
        components_path = os.path.join(workspace_dir, "components", "src", "dynamo")
        if os.path.exists(components_path):
            for item in os.listdir(components_path):
                item_path = os.path.join(components_path, item)
                if os.path.isdir(item_path):
                    # Check for dynamo module in src
                    module_path = os.path.join(item_path, "__init__.py")
                    if os.path.exists(module_path):
                        components.append(f"dynamo.{item}")

        return components


class DynamoInfo(NodeInfo):
    """Dynamo workspace information"""

    def __init__(self, thorough_check: bool = False, runtime_check: bool = False):
        self.thorough_check = thorough_check
        self.runtime_check = runtime_check

        # Find workspace directory
        workspace_dir = DynamoInfo.find_workspace()

        # For runtime check, we don't need a workspace - just check packages
        if self.runtime_check and not workspace_dir:
            super().__init__(
                label="Dynamo",
                desc="workspace not found (runtime container) - checking installed packages",
                status=NodeStatus.WARNING,
            )
            # Check runtime components even without workspace
            runtime_info = DynamoRuntimeInfo(
                None,
                thorough_check=self.thorough_check,
                runtime_check=self.runtime_check,
            )
            self.add_child(runtime_info)

            # Check framework components even without workspace
            framework_info = DynamoFrameworkInfo(
                None,
                thorough_check=self.thorough_check,
                runtime_check=self.runtime_check,
            )
            self.add_child(framework_info)
            return

        if not workspace_dir:
            # Show error when workspace is not found
            super().__init__(
                label="Dynamo",
                desc="workspace not found - cannot detect Runtime and Framework components",
                status=NodeStatus.ERROR,
            )
            # Add helpful information about where we looked
            search_paths = NodeInfo(
                label="Searched in",
                desc="current dir, ~/dynamo, DYNAMO_HOME, /workspace",
                status=NodeStatus.INFO,
            )
            self.add_child(search_paths)
            hint = NodeInfo(
                label="Hint",
                desc="Run from a Dynamo workspace directory or set DYNAMO_HOME",
                status=NodeStatus.INFO,
            )
            self.add_child(hint)
            return

        # Build main label
        display_workspace = self._replace_home_with_var(workspace_dir)
        super().__init__(label="Dynamo", desc=display_workspace, status=NodeStatus.INFO)

        # Add explicit git info as a child so it's always visible and can clearly say
        # "not a git directory" when unavailable.
        git_sha, git_date, git_branch, git_msg = self._get_git_info(workspace_dir)
        if git_sha:
            parts = [git_sha]
            if git_branch:
                parts.append(f"branch={git_branch}")
            if git_date:
                parts.append(f"Date: {git_date}")
            git_desc = ", ".join(parts)
        else:
            git_desc = git_msg
        self.add_child(
            NodeInfo(label="Git HEAD", desc=git_desc, status=NodeStatus.INFO)
        )

        # Always add runtime components
        runtime_info = DynamoRuntimeInfo(
            workspace_dir,
            thorough_check=self.thorough_check,
            runtime_check=self.runtime_check,
        )
        self.add_child(runtime_info)

        # Always add framework components
        framework_info = DynamoFrameworkInfo(
            workspace_dir,
            thorough_check=self.thorough_check,
            runtime_check=self.runtime_check,
        )
        self.add_child(framework_info)

    def _get_git_info(
        self, workspace_dir: str
    ) -> Tuple[Optional[str], Optional[str], Optional[str], str]:
        """Get git SHA, date, and branch for the workspace (or a clear message when unavailable)."""
        git_bin = shutil.which("git")
        if not git_bin:
            return None, None, None, "git not found"

        try:
            # First, detect whether we're inside a git work tree.
            result = subprocess.run(
                [git_bin, "rev-parse", "--is-inside-work-tree"],
                capture_output=True,
                text=True,
                cwd=workspace_dir,
                timeout=5,
            )
            if result.returncode != 0 or result.stdout.strip().lower() != "true":
                return None, None, None, "not in a git directory"

            # Get short SHA
            result = subprocess.run(
                [git_bin, "rev-parse", "--short", "HEAD"],
                capture_output=True,
                text=True,
                cwd=workspace_dir,
                timeout=5,
            )
            sha = result.stdout.strip() if result.returncode == 0 else None

            # Get branch name (best-effort). In detached HEAD this returns "HEAD".
            branch: Optional[str] = None
            try:
                result = subprocess.run(
                    [git_bin, "rev-parse", "--abbrev-ref", "HEAD"],
                    capture_output=True,
                    text=True,
                    cwd=workspace_dir,
                    timeout=5,
                )
                if result.returncode == 0:
                    candidate = result.stdout.strip()
                    if candidate and candidate != "HEAD":
                        branch = candidate
                    elif candidate == "HEAD":
                        branch = "detached"
            except Exception:
                branch = None

            # Get commit date
            result = subprocess.run(
                [git_bin, "show", "-s", "--format=%ci", "HEAD"],
                capture_output=True,
                text=True,
                cwd=workspace_dir,
                timeout=5,
            )
            if result.returncode == 0 and result.stdout.strip():
                # Convert to PDT format
                date_str = result.stdout.strip()
                # Parse and format as PDT
                try:
                    # Parse the git date (format: 2025-08-30 23:22:29 +0000)
                    import datetime as dt_module

                    # Split off timezone info
                    date_part = date_str.rsplit(" ", 1)[0]
                    dt = dt_module.datetime.strptime(date_part, "%Y-%m-%d %H:%M:%S")
                    # Convert to PDT (UTC-7)
                    dt_pdt = dt - dt_module.timedelta(hours=7)
                    date = dt_pdt.strftime("%Y-%m-%d %H:%M:%S PDT")
                except Exception:
                    date = date_str
            else:
                date = None

            if sha:
                return sha, date, branch, ""
            return None, None, None, "not in a git directory"
        except Exception:
            return None, None, None, "not in a git directory"

    @staticmethod
    def find_workspace() -> Optional[str]:
        """Find dynamo workspace directory."""
        candidates = []

        # Check DYNAMO_HOME environment variable first
        dynamo_home = os.environ.get("DYNAMO_HOME")
        if dynamo_home:
            candidates.append(os.path.expanduser(dynamo_home))

        # Then check common locations
        candidates.extend(
            [
                ".",  # Current directory
                os.path.expanduser("~/dynamo"),
                "/workspace",
            ]
        )

        for candidate in candidates:
            if DynamoInfo.is_dynamo_workspace(candidate):
                return os.path.abspath(candidate)
        return None

    @staticmethod
    def is_dynamo_workspace(path: str) -> bool:
        """Check if directory is a dynamo workspace."""
        if not os.path.exists(path):
            return False

        # Check for indicators of a dynamo workspace
        indicators = [
            "README.md",
            "components",
            "lib/bindings/python",
            "lib/runtime",
            "Cargo.toml",
        ]

        # Require at least 3 indicators to be confident
        found = 0
        for indicator in indicators:
            check_path = os.path.join(path, indicator)
            if os.path.exists(check_path):
                found += 1

        return found >= 3


def has_framework_errors(tree: NodeInfo) -> bool:
    """Check if there are framework component errors in the tree"""
    # Find the Dynamo node
    for child in tree.children:
        if child.label and "Dynamo" in child.label:
            # Find the Framework components node
            for dynamo_child in child.children:
                if dynamo_child.label and "Framework components" in dynamo_child.label:
                    # Use the has_errors() method to check the entire subtree
                    return dynamo_child.has_errors()
    return False


def show_installation_recommendation():
    """Show installation recommendations for missing components."""
    print("\nTo install missing components for development (not production):")
    print("  Runtime:   (cd lib/bindings/python && maturin develop)")
    print("  Framework: uv pip install -e .")
    print("             or export PYTHONPATH=$DYNAMO_HOME/components/src\n")


def get_installation_recommendation_lines() -> List[str]:
    """
    Get installation recommendations for missing components.

    Why: `--json-output` must keep stdout JSON-only. We return structured lines that
    can be embedded in JSON instead of printing free-form text.
    """
    return [
        "To install missing components for development (not production):",
        "  Runtime:   (cd lib/bindings/python && maturin develop)",
        "  Framework: uv pip install -e .",
        "             or export PYTHONPATH=$DYNAMO_HOME/components/src",
    ]


def main():
    """Main function - collect and display system information"""
    import argparse
    import sys

    # Parse command line arguments
    parser = argparse.ArgumentParser(
        description="Display system information for Dynamo project"
    )
    parser.add_argument(
        "--thorough-check",
        action="store_true",
        help="Enable thorough checking (file permissions, directory sizes, disk space, etc.)",
    )
    parser.add_argument(
        "--terse",
        action="store_true",
        help="Show only essential information (OS, User, GPU, Framework, Dynamo) and errors",
    )
    parser.add_argument(
        "--json",
        "--json-output",
        dest="json_output",
        action="store_true",
        help="Output a JSON representation (terse subset) suitable for copy/paste",
    )
    parser.add_argument(
        "--runtime-check",
        "--runtime",
        action="store_true",
        help="Skip compile-time dependency checks (Rust, Cargo, Maturin) for runtime containers and validate ai-dynamo packages",
    )
    parser.add_argument(
        "--no-gpu-check",
        action="store_true",
        help="Skip GPU detection and information collection (useful for CI environments without GPU access)",
    )
    parser.add_argument(
        "--no-framework-check",
        dest="no_framework_check",
        action="store_true",
        help="Skip LLM framework package checks (vllm, sglang, tensorrt_llm)",
    )
    args = parser.parse_args()

    # Validate mutual exclusion
    if args.thorough_check and args.terse:
        parser.error("--thorough-check and --terse cannot be used together")
    if args.json_output and args.thorough_check:
        parser.error("--json-output and --thorough-check cannot be used together")
    if args.json_output and args.terse:
        parser.error(
            "--json-output and --terse cannot be used together (json-output is already terse)"
        )
    # Keep `--json-output` output JSON-only for copy/paste (no Python warnings noise).
    if args.json_output:
        import warnings

        warnings.filterwarnings("ignore")

    # Simply create a SystemInfo instance - it collects everything in its constructor
    tree = SystemInfo(
        thorough_check=args.thorough_check,
        terse=args.terse or args.json_output,
        runtime_check=args.runtime_check,
        no_gpu_check=args.no_gpu_check,
        no_framework_check=args.no_framework_check,
    )

    framework_errors = has_framework_errors(tree)

    if args.json_output:
        out = tree.to_json_obj()
        if framework_errors:
            out["install_recommendation"] = get_installation_recommendation_lines()
        print(
            json.dumps(out, separators=(",", ":"), sort_keys=True, ensure_ascii=False)
        )
    else:
        tree.print_tree()

    # Check if there are framework component errors and show installation recommendation
    if framework_errors and not args.json_output:
        show_installation_recommendation()

    # Exit with non-zero status if there are any errors
    if tree.has_errors():
        sys.exit(1)
    else:
        sys.exit(0)


if __name__ == "__main__":
    main()
