import asyncio
import tempfile
import os
import logging
import glob
import json
import requests
from typing import Optional

from mutagen.easyid3 import EasyID3
from mutagen.id3 import ID3, APIC, error

logger = logging.getLogger(__name__)


async def get_video_info(url: str) -> dict:
    """Получает информацию о видео через yt-dlp"""
    try:
        process = await asyncio.create_subprocess_exec(
            "yt-dlp",
            "--dump-json",
            "--no-playlist",
            "--cookies",
            "/addons/download_mp3_to_youtube/cookies.txt",
            url,
            stdout=asyncio.subprocess.PIPE,
            stderr=asyncio.subprocess.PIPE,
        )

        stdout, stderr = await process.communicate()
        if process.returncode == 0:
            return json.loads(stdout.decode())
    except Exception as e:
        logger.warning(f"Не удалось получить информацию о видео: {e}")
    return None


async def download_thumbnail(
    thumbnail_url: str,
) -> tuple[Optional[bytes], Optional[str]]:
    """Скачивает обложку видео и возвращает данные и MIME тип"""
    try:
        response = requests.get(thumbnail_url, timeout=10)
        if response.status_code == 200:
            if "jpeg" in thumbnail_url or "jpg" in thumbnail_url:
                mime_type = "image/jpeg"
            elif "png" in thumbnail_url:
                mime_type = "image/png"
            else:
                mime_type = response.headers.get("Content-Type", "image/jpeg")
            return response.content, mime_type
    except Exception as e:
        logger.warning(f"Не удалось скачать обложку: {e}")
    return None, None


def apply_metadata(mp3_path: str, metadata: dict):
    """Прописывает ID3-теги и обложку в MP3"""
    try:
        try:
            audio = EasyID3(mp3_path)
        except error:
            audio = EasyID3()
            audio.save(mp3_path)

        audio["title"] = metadata.get("title", "Unknown Title")
        audio["artist"] = metadata.get("performer", "Unknown Artist")
        audio.save(mp3_path)

        if metadata.get("thumbnail_data"):
            audio = ID3(mp3_path)
            audio.add(
                APIC(
                    encoding=3,
                    mime=metadata.get("thumbnail_mime", "image/jpeg"),
                    type=3,  # front cover
                    desc="Cover",
                    data=metadata["thumbnail_data"],
                )
            )
            audio.save(mp3_path)
            logger.info("Обложка добавлена в MP3")
    except Exception as e:
        logger.warning(f"Не удалось прописать метаданные: {e}")


async def download_mp3_isolated(url: str) -> tuple[str, dict]:
    """Скачивает MP3, добавляет метаданные и возвращает путь к файлу и метаданные"""

    with tempfile.TemporaryDirectory() as temp_dir:
        output_template = os.path.join(temp_dir, "audio.%(ext)s")

        try:
            logger.info(f"Запускаю yt-dlp для: {url}")

            video_info = await get_video_info(url)
            title = "Unknown Title"
            uploader = "Unknown Artist"
            thumbnail_url = None
            duration = 0

            if video_info:
                title = video_info.get("title", "Unknown Title")
                uploader = video_info.get("uploader", "Unknown Artist")
                thumbnail_url = video_info.get("thumbnail")
                if not thumbnail_url and video_info.get("thumbnails"):
                    thumbnails = video_info.get("thumbnails", [])
                    if thumbnails:
                        thumbnail_url = thumbnails[-1].get("url")
                duration = video_info.get("duration", 0)
                logger.info(f"Получена информация о видео: {title}")

            process = await asyncio.create_subprocess_exec(
                "yt-dlp",
                "-x",
                "--audio-format",
                "mp3",
                "--cookies",
                "/addons/download_mp3_to_youtube/cookies.txt",
                "--audio-quality",
                "320K",
                "--no-playlist",
                "-o",
                output_template,
                "--ignore-errors",
                url,
                stdout=asyncio.subprocess.PIPE,
                stderr=asyncio.subprocess.PIPE,
            )

            stdout, stderr = await asyncio.wait_for(process.communicate(), timeout=300)

            mp3_files = glob.glob(os.path.join(temp_dir, "*.mp3"))
            if mp3_files:
                actual_file = mp3_files[0]
                if os.path.getsize(actual_file) > 1000:
                    with tempfile.NamedTemporaryFile(
                        suffix=".mp3", delete=False
                    ) as final_file:
                        final_filename = final_file.name

                    with (
                        open(actual_file, "rb") as src,
                        open(final_filename, "wb") as dst,
                    ):
                        dst.write(src.read())

                    thumbnail_data, mime_type = None, None
                    if thumbnail_url:
                        thumbnail_data, mime_type = await download_thumbnail(
                            thumbnail_url
                        )
                        if thumbnail_data:
                            logger.info(f"Обложка скачана: {thumbnail_url}")

                    metadata = {
                        "title": title,
                        "performer": uploader,
                        "duration": duration,
                        "thumbnail_data": thumbnail_data,
                        "thumbnail_mime": mime_type,
                    }

                    # Прописываем теги в MP3
                    apply_metadata(final_filename, metadata)

                    logger.info(f"Успешно скачан и обновлён тегами: {final_filename}")
                    return final_filename, metadata

            error_msg = stderr.decode() or stdout.decode() or "Файл не создан"
            raise Exception(f"Ошибка загрузки: {error_msg}")

        except asyncio.TimeoutError:
            raise Exception("Таймаут загрузки (5 минут)")
        except Exception as e:
            raise e