from fastapi import (
    Depends,
    FastAPI,
    HTTPException,
    status,
    Request,
    UploadFile,
    File,
    Form,
)


from datetime import datetime, timedelta
from typing import List, Union, Optional
from pathlib import Path

from fastapi import APIRouter
from fastapi.responses import StreamingResponse, JSONResponse, FileResponse

from pydantic import BaseModel
import json

from apps.webui.internal.db import get_db
from apps.webui.models.files import (
    Files,
    FileForm,
    FileModel,
    FileModelResponse,
)
from utils.utils import get_verified_user, get_admin_user
from constants import ERROR_MESSAGES

from importlib import util
import os
import uuid
import os, shutil, logging, re


from config import SRC_LOG_LEVELS, UPLOAD_DIR


log = logging.getLogger(__name__)
log.setLevel(SRC_LOG_LEVELS["MODELS"])


router = APIRouter()

############################
# Upload File
############################


@router.post("/")
def upload_file(
    file: UploadFile = File(...),
    user=Depends(get_verified_user),
    db=Depends(get_db)
):
    log.info(f"file.content_type: {file.content_type}")
    try:
        unsanitized_filename = file.filename
        filename = os.path.basename(unsanitized_filename)

        # replace filename with uuid
        id = str(uuid.uuid4())
        filename = f"{id}_{filename}"
        file_path = f"{UPLOAD_DIR}/{filename}"

        contents = file.file.read()
        with open(file_path, "wb") as f:
            f.write(contents)
            f.close()

        file = Files.insert_new_file(
            db,
            user.id,
            FileForm(
                **{
                    "id": id,
                    "filename": filename,
                    "meta": {
                        "content_type": file.content_type,
                        "size": len(contents),
                        "path": file_path,
                    },
                }
            ),
        )

        if file:
            return file
        else:
            raise HTTPException(
                status_code=status.HTTP_400_BAD_REQUEST,
                detail=ERROR_MESSAGES.DEFAULT("Error uploading file"),
            )

    except Exception as e:
        log.exception(e)
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail=ERROR_MESSAGES.DEFAULT(e),
        )


############################
# List Files
############################


@router.get("/", response_model=List[FileModel])
async def list_files(user=Depends(get_verified_user), db=Depends(get_db)):
    files = Files.get_files(db)
    return files


############################
# Delete All Files
############################


@router.delete("/all")
async def delete_all_files(user=Depends(get_admin_user), db=Depends(get_db)):
    result = Files.delete_all_files(db)

    if result:
        folder = f"{UPLOAD_DIR}"
        try:
            # Check if the directory exists
            if os.path.exists(folder):
                # Iterate over all the files and directories in the specified directory
                for filename in os.listdir(folder):
                    file_path = os.path.join(folder, filename)
                    try:
                        if os.path.isfile(file_path) or os.path.islink(file_path):
                            os.unlink(file_path)  # Remove the file or link
                        elif os.path.isdir(file_path):
                            shutil.rmtree(file_path)  # Remove the directory
                    except Exception as e:
                        print(f"Failed to delete {file_path}. Reason: {e}")
            else:
                print(f"The directory {folder} does not exist")
        except Exception as e:
            print(f"Failed to process the directory {folder}. Reason: {e}")

        return {"message": "All files deleted successfully"}
    else:
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail=ERROR_MESSAGES.DEFAULT("Error deleting files"),
        )


############################
# Get File By Id
############################


@router.get("/{id}", response_model=Optional[FileModel])
async def get_file_by_id(id: str, user=Depends(get_verified_user), db=Depends(get_db)):
    file = Files.get_file_by_id(db, id)

    if file:
        return file
    else:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail=ERROR_MESSAGES.NOT_FOUND,
        )


############################
# Get File Content By Id
############################


@router.get("/{id}/content", response_model=Optional[FileModel])
async def get_file_content_by_id(id: str, user=Depends(get_verified_user), db=Depends(get_db)):
    file = Files.get_file_by_id(db, id)

    if file:
        file_path = Path(file.meta["path"])

        # Check if the file already exists in the cache
        if file_path.is_file():
            print(f"file_path: {file_path}")
            return FileResponse(file_path)
        else:
            raise HTTPException(
                status_code=status.HTTP_404_NOT_FOUND,
                detail=ERROR_MESSAGES.NOT_FOUND,
            )
    else:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail=ERROR_MESSAGES.NOT_FOUND,
        )


@router.get("/{id}/content/{file_name}", response_model=Optional[FileModel])
async def get_file_content_by_id(id: str, user=Depends(get_verified_user)):
    file = Files.get_file_by_id(id)

    if file:
        file_path = Path(file.meta["path"])

        # Check if the file already exists in the cache
        if file_path.is_file():
            print(f"file_path: {file_path}")
            return FileResponse(file_path)
        else:
            raise HTTPException(
                status_code=status.HTTP_404_NOT_FOUND,
                detail=ERROR_MESSAGES.NOT_FOUND,
            )
    else:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail=ERROR_MESSAGES.NOT_FOUND,
        )


############################
# Delete File By Id
############################


@router.delete("/{id}")
async def delete_file_by_id(id: str, user=Depends(get_verified_user), db=Depends(get_db)):
    file = Files.get_file_by_id(db, id)

    if file:
        result = Files.delete_file_by_id(db, id)
        if result:
            return {"message": "File deleted successfully"}
        else:
            raise HTTPException(
                status_code=status.HTTP_400_BAD_REQUEST,
                detail=ERROR_MESSAGES.DEFAULT("Error deleting file"),
            )
    else:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail=ERROR_MESSAGES.NOT_FOUND,
        )
