import json
import uuid
from abc import ABC, abstractmethod
from typing import Any, Dict, Optional

from loguru import logger

from ...media import is_base64_audio, is_base64_image, save_base64_audio, save_base64_image
from ...schema import TaskResponse
from ..file_service import FileService
from ..inference import DistributedInferenceService


class BaseGenerationService(ABC):
    def __init__(self, file_service: FileService, inference_service: DistributedInferenceService):
        self.file_service = file_service
        self.inference_service = inference_service

    @abstractmethod
    def get_output_extension(self) -> str:
        pass

    @abstractmethod
    def get_task_type(self) -> str:
        pass

    def _is_target_task_type(self) -> bool:
        if self.inference_service.worker and self.inference_service.worker.runner:
            task_type = self.inference_service.worker.runner.config.get("task", "t2v")
            return task_type in self.get_task_type().split(",")
        return False

    async def _process_image_path(self, image_path: str, task_data: Dict[str, Any]) -> None:
        if not image_path:
            return

        if image_path.startswith("http"):
            downloaded_path = await self.file_service.download_image(image_path)
            task_data["image_path"] = str(downloaded_path)
        elif is_base64_image(image_path):
            saved_path = save_base64_image(image_path, str(self.file_service.input_image_dir))
            task_data["image_path"] = str(saved_path)
        else:
            task_data["image_path"] = image_path

    async def _process_audio_path(self, audio_path: str, task_data: Dict[str, Any]) -> None:
        if not audio_path:
            return

        if audio_path.startswith("http"):
            downloaded_path = await self.file_service.download_audio(audio_path)
            task_data["audio_path"] = str(downloaded_path)
        elif is_base64_audio(audio_path):
            saved_path = save_base64_audio(audio_path, str(self.file_service.input_audio_dir))
            task_data["audio_path"] = str(saved_path)
        else:
            task_data["audio_path"] = audio_path

    async def _process_talk_objects(self, talk_objects: list, task_data: Dict[str, Any]) -> None:
        if not talk_objects:
            return

        task_data["talk_objects"] = [{} for _ in range(len(talk_objects))]

        for index, talk_object in enumerate(talk_objects):
            if talk_object.audio.startswith("http"):
                audio_path = await self.file_service.download_audio(talk_object.audio)
                task_data["talk_objects"][index]["audio"] = str(audio_path)
            elif is_base64_audio(talk_object.audio):
                audio_path = save_base64_audio(talk_object.audio, str(self.file_service.input_audio_dir))
                task_data["talk_objects"][index]["audio"] = str(audio_path)
            else:
                task_data["talk_objects"][index]["audio"] = talk_object.audio

            if talk_object.mask.startswith("http"):
                mask_path = await self.file_service.download_image(talk_object.mask)
                task_data["talk_objects"][index]["mask"] = str(mask_path)
            elif is_base64_image(talk_object.mask):
                mask_path = save_base64_image(talk_object.mask, str(self.file_service.input_image_dir))
                task_data["talk_objects"][index]["mask"] = str(mask_path)
            else:
                task_data["talk_objects"][index]["mask"] = talk_object.mask

        temp_path = self.file_service.cache_dir / uuid.uuid4().hex[:8]
        temp_path.mkdir(parents=True, exist_ok=True)
        task_data["audio_path"] = str(temp_path)

        config_path = temp_path / "config.json"
        with open(config_path, "w") as f:
            json.dump({"talk_objects": task_data["talk_objects"]}, f)

    def _prepare_output_path(self, save_result_path: str, task_data: Dict[str, Any]) -> None:
        actual_save_path = self.file_service.get_output_path(save_result_path)
        if not actual_save_path.suffix:
            actual_save_path = actual_save_path.with_suffix(self.get_output_extension())
        task_data["save_result_path"] = str(actual_save_path)
        task_data["video_path"] = actual_save_path.name

    async def generate_with_stop_event(self, message: Any, stop_event) -> Optional[Any]:
        try:
            task_data = {field: getattr(message, field) for field in message.model_fields_set if field != "task_id"}
            task_data["task_id"] = message.task_id

            if stop_event.is_set():
                logger.info(f"Task {message.task_id} cancelled before processing")
                return None

            if hasattr(message, "image_path") and message.image_path:
                await self._process_image_path(message.image_path, task_data)
                logger.info(f"Task {message.task_id} image path: {task_data.get('image_path')}")

            if hasattr(message, "audio_path") and message.audio_path:
                await self._process_audio_path(message.audio_path, task_data)
                logger.info(f"Task {message.task_id} audio path: {task_data.get('audio_path')}")

            if hasattr(message, "talk_objects") and message.talk_objects:
                await self._process_talk_objects(message.talk_objects, task_data)

            self._prepare_output_path(message.save_result_path, task_data)
            task_data["seed"] = message.seed

            result = await self.inference_service.submit_task_async(task_data)

            if result is None:
                if stop_event.is_set():
                    logger.info(f"Task {message.task_id} cancelled during processing")
                    return None
                raise RuntimeError("Task processing failed")

            if result.get("status") == "success":
                actual_save_path = self.file_service.get_output_path(message.save_result_path)
                if not actual_save_path.suffix:
                    actual_save_path = actual_save_path.with_suffix(self.get_output_extension())
                return TaskResponse(
                    task_id=message.task_id,
                    task_status="completed",
                    save_result_path=actual_save_path.name,
                )
            else:
                error_msg = result.get("error", "Inference failed")
                raise RuntimeError(error_msg)

        except Exception as e:
            logger.exception(f"Task {message.task_id} processing failed: {str(e)}")
            raise