from typing import List, Optional
from pathlib import Path

from fastapi import APIRouter, HTTPException
from loguru import logger
from pydantic import BaseModel

from api.podcast_service import (
    PodcastGenerationRequest,
    PodcastGenerationResponse,
    PodcastService,
)
from open_notebook.domain.podcast import PodcastEpisode

router = APIRouter()


class PodcastEpisodeResponse(BaseModel):
    id: str
    name: str
    episode_profile: dict
    speaker_profile: dict
    briefing: str
    audio_file: Optional[str] = None
    transcript: Optional[dict] = None
    outline: Optional[dict] = None
    created: Optional[str] = None
    job_status: Optional[str] = None


@router.post("/podcasts/generate", response_model=PodcastGenerationResponse)
async def generate_podcast(request: PodcastGenerationRequest):
    """
    Generate a podcast episode using Episode Profiles.
    Returns immediately with job ID for status tracking.
    """
    try:
        job_id = await PodcastService.submit_generation_job(
            episode_profile_name=request.episode_profile,
            speaker_profile_name=request.speaker_profile,
            episode_name=request.episode_name,
            notebook_id=request.notebook_id,
            content=request.content,
            briefing_suffix=request.briefing_suffix,
        )

        return PodcastGenerationResponse(
            job_id=job_id,
            status="submitted",
            message=f"Podcast generation started for episode '{request.episode_name}'",
            episode_profile=request.episode_profile,
            episode_name=request.episode_name,
        )

    except Exception as e:
        logger.error(f"Error generating podcast: {str(e)}")
        raise HTTPException(
            status_code=500, detail=f"Failed to generate podcast: {str(e)}"
        )


@router.get("/podcasts/jobs/{job_id}")
async def get_podcast_job_status(job_id: str):
    """Get the status of a podcast generation job"""
    try:
        status_data = await PodcastService.get_job_status(job_id)
        return status_data

    except Exception as e:
        logger.error(f"Error fetching podcast job status: {str(e)}")
        raise HTTPException(
            status_code=500, detail=f"Failed to fetch job status: {str(e)}"
        )


@router.get("/podcasts/episodes", response_model=List[PodcastEpisodeResponse])
async def list_podcast_episodes():
    """List all podcast episodes"""
    try:
        episodes = await PodcastService.list_episodes()

        response_episodes = []
        for episode in episodes:
            # Skip incomplete episodes without command or audio
            if not episode.command and not episode.audio_file:
                continue
            
            # Get job status if available
            job_status = None
            if episode.command:
                try:
                    job_status = await episode.get_job_status()
                except:
                    job_status = "unknown"
            else:
                # No command but has audio file = completed import
                job_status = "completed"

            response_episodes.append(
                PodcastEpisodeResponse(
                    id=str(episode.id),
                    name=episode.name,
                    episode_profile=episode.episode_profile,
                    speaker_profile=episode.speaker_profile,
                    briefing=episode.briefing,
                    audio_file=episode.audio_file,
                    transcript=episode.transcript,
                    outline=episode.outline,
                    created=str(episode.created) if episode.created else None,
                    job_status=job_status,
                )
            )

        return response_episodes

    except Exception as e:
        logger.error(f"Error listing podcast episodes: {str(e)}")
        raise HTTPException(
            status_code=500, detail=f"Failed to list podcast episodes: {str(e)}"
        )


@router.get("/podcasts/episodes/{episode_id}", response_model=PodcastEpisodeResponse)
async def get_podcast_episode(episode_id: str):
    """Get a specific podcast episode"""
    try:
        episode = await PodcastService.get_episode(episode_id)

        # Get job status if available
        job_status = None
        if episode.command:
            try:
                job_status = await episode.get_job_status()
            except:
                job_status = "unknown"
        else:
            # No command but has audio file = completed import
            job_status = "completed" if episode.audio_file else "unknown"

        return PodcastEpisodeResponse(
            id=str(episode.id),
            name=episode.name,
            episode_profile=episode.episode_profile,
            speaker_profile=episode.speaker_profile,
            briefing=episode.briefing,
            audio_file=episode.audio_file,
            transcript=episode.transcript,
            outline=episode.outline,
            created=str(episode.created) if episode.created else None,
            job_status=job_status,
        )

    except Exception as e:
        logger.error(f"Error fetching podcast episode: {str(e)}")
        raise HTTPException(status_code=404, detail=f"Episode not found: {str(e)}")


@router.delete("/podcasts/episodes/{episode_id}")
async def delete_podcast_episode(episode_id: str):
    """Delete a podcast episode and its associated audio file"""
    try:
        # Get the episode first to check if it exists and get the audio file path
        episode = await PodcastService.get_episode(episode_id)
        
        # Delete the physical audio file if it exists
        if episode.audio_file:
            audio_path = Path(episode.audio_file)
            if audio_path.exists():
                try:
                    audio_path.unlink()
                    logger.info(f"Deleted audio file: {audio_path}")
                except Exception as e:
                    logger.warning(f"Failed to delete audio file {audio_path}: {e}")
        
        # Delete the episode from the database
        await episode.delete()
        
        logger.info(f"Deleted podcast episode: {episode_id}")
        return {"message": "Episode deleted successfully", "episode_id": episode_id}
        
    except Exception as e:
        logger.error(f"Error deleting podcast episode: {str(e)}")
        raise HTTPException(status_code=500, detail=f"Failed to delete episode: {str(e)}")