from pathlib import Path

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

from database.database import DbSession
from download.download_service import downloadAsync
from model.video import Video
from stream.stream_service import streamAndSave

router = APIRouter(prefix="/videos")


@router.post("/{videoId}/download")
def download(videoId: int, db: DbSession, maxHeight: int = 1080):
    video = Video.getById(db, videoId)
    if not video:
        raise HTTPException(404, "Video nicht gefunden")
    if video.filePath:
        return {"status": "already_downloaded"}

    downloadAsync(videoId, video.youtubeUrl, maxHeight)
    return {"status": "download_started"}


@router.get("/{videoId}/stream")
def stream(videoId: int, db: DbSession, maxHeight: int = 1080):
    video = Video.getById(db, videoId)
    if not video:
        raise HTTPException(404, "Video nicht gefunden")

    if not video.filePath:
        return StreamingResponse(streamAndSave(videoId, video.youtubeUrl, maxHeight), media_type="video/mp4")

    path = Path(video.filePath)
    if not path.exists():
        raise HTTPException(404, "Videodatei nicht gefunden")
    return FileResponse(path, media_type="video/mp4")


@router.get("/{videoId}/file")
def getFile(videoId: int, db: DbSession):
    path, video = Video.getValidPath(db, videoId)
    if not path:
        raise HTTPException(404, "Video noch nicht heruntergeladen")
    return FileResponse(path, media_type="video/mp4", filename=f"{video.title}.mp4")


@router.delete("/{videoId}/file")
def deleteFile(videoId: int, db: DbSession):
    if not Video.deleteServerFile(db, videoId):
        raise HTTPException(404, "Video nicht gefunden")
    return {"status": "deleted"}