from __future__ import unicode_literals

import os
import traceback
import tempfile
from glob import glob
from datetime import datetime
from threading import Thread
from enum import Enum
from typing import Optional, Dict, List, Any, Tuple, Union

import shutil as celery_shutil
from .setup import P

logger = P.logger
ModelSetting = P.ModelSetting

# yt-dlp 패키지 설정 (기본값 index 1)
package_idx: str = ModelSetting.get("youtube_dl_package")
if not package_idx:
    package_idx = "1"
youtube_dl_package: str = P.youtube_dl_packages[int(package_idx)].replace("-", "_")


class Status(Enum):
    READY = 0
    START = 1
    DOWNLOADING = 2
    ERROR = 3
    FINISHED = 4
    STOP = 5
    COMPLETED = 6

    def __str__(self) -> str:
        str_list: List[str] = ["준비", "분석중", "다운로드중", "실패", "변환중", "중지", "완료"]
        return str_list[self.value]


class MyYoutubeDL:
    DEFAULT_FILENAME: str = "%(title)s-%(id)s.%(ext)s"

    _index: int = 0

    def __init__(
        self,
        plugin: str,
        type_name: str,
        url: str,
        filename: str,
        temp_path: str,
        save_path: Optional[str] = None,
        opts: Optional[Dict[str, Any]] = None,
        dateafter: Optional[str] = None,
        datebefore: Optional[str] = None,
    ):
        # yt-dlp/youtube-dl의 utils 모듈에서 DateRange 임포트
        DateRange = __import__(
            f"{youtube_dl_package}.utils", fromlist=["DateRange"]
        ).DateRange

        if save_path is None:
            save_path = temp_path
        if opts is None:
            opts = {}
        
        self.plugin: str = plugin
        self.type: str = type_name
        self.url: str = url
        self.filename: str = filename
        
        # 임시 폴더 생성
        if not os.path.isdir(temp_path):
            os.makedirs(temp_path)
        self.temp_path: str = tempfile.mkdtemp(prefix="youtube-dl_", dir=temp_path)
        
        # 저장 폴더 생성
        if not os.path.isdir(save_path):
            os.makedirs(save_path)
        self.save_path: str = save_path
        
        self.opts: Dict[str, Any] = opts
        if dateafter or datebefore:
            self.opts["daterange"] = DateRange(start=dateafter, end=datebefore)
            
        self.index: int = MyYoutubeDL._index
        MyYoutubeDL._index += 1
        
        self._status: Status = Status.READY
        self._thread: Optional[Thread] = None
        self.key: Optional[str] = None
        self.start_time: Optional[datetime] = None
        self.end_time: Optional[datetime] = None
        
        # 비디오 정보
        self.info_dict: Dict[str, Optional[str]] = {
            "extractor": None,
            "title": None,
            "uploader": None,
            "uploader_url": None,
        }
        
        # 진행률 정보
        self.progress_hooks: Dict[str, Optional[Union[int, float, str]]] = {
            "downloaded_bytes": None,
            "total_bytes": None,
            "eta": None,
            "speed": None,
        }

    def start(self) -> bool:
        """다운로드 스레드 시작"""
        if self.status != Status.READY:
            return False
        self._thread = Thread(target=self.run)
        self._thread.start()
        return True

    def run(self) -> None:
        """다운로드 실행 본체"""
        youtube_dl = __import__(youtube_dl_package)

        try:
            self.start_time = datetime.now()
            self.status = Status.START
            
            # 정보 추출
            info_dict = MyYoutubeDL.get_info_dict(
                self.url,
                self.opts.get("proxy"),
                self.opts.get("cookiefile"),
                self.opts.get("http_headers"),
                self.opts.get("cookiesfrombrowser"),
            )
            
            if info_dict is None:
                self.status = Status.ERROR
                return
                
            self.info_dict["extractor"] = info_dict.get("extractor", "unknown")
            self.info_dict["title"] = info_dict.get("title", info_dict.get("id", "unknown"))
            self.info_dict["uploader"] = info_dict.get("uploader", "")
            self.info_dict["uploader_url"] = info_dict.get("uploader_url", "")
            
            ydl_opts: Dict[str, Any] = {
                "logger": MyLogger(),
                "progress_hooks": [self.my_hook],
                "outtmpl": os.path.join(self.temp_path, self.filename),
                "ignoreerrors": True,
                "cachedir": False,
                "nocheckcertificate": True,
            }
            
            # yt-dlp 전용 성능 향상 옵션
            if youtube_dl_package == "yt_dlp":
                ydl_opts.update({
                    "concurrent_fragment_downloads": 5,
                    "retries": 10,
                })

            ydl_opts.update(self.opts)
            
            with youtube_dl.YoutubeDL(ydl_opts) as ydl:
                logger.debug(f"다운로드 시작: {self.url}")
                error_code: int = ydl.download([self.url])
                logger.debug(f"다운로드 종료 (코드: {error_code})")
                
            if self.status in (Status.START, Status.FINISHED, Status.DOWNLOADING):
                # 임시 폴더의 파일을 실제 저장 경로로 이동
                for i in glob(self.temp_path + "/**/*", recursive=True):
                    path: str = i.replace(self.temp_path, self.save_path, 1)
                    if os.path.isdir(i):
                        if not os.path.isdir(path):
                            os.mkdir(path)
                        continue
                    celery_shutil.move(i, path)
                self.status = Status.COMPLETED
        except Exception as error:
            self.status = Status.ERROR
            logger.error(f"실행 중 예외 발생: {error}")
            logger.error(traceback.format_exc())
        finally:
            if os.path.exists(self.temp_path):
                celery_shutil.rmtree(self.temp_path)
            if self.status != Status.STOP:
                self.end_time = datetime.now()

    def stop(self) -> bool:
        """다운로드 중지"""
        if self.status in (Status.ERROR, Status.STOP, Status.COMPLETED):
            return False
        self.status = Status.STOP
        self.end_time = datetime.now()
        return True

    @staticmethod
    def get_preview_url(url: str) -> Optional[str]:
        """미리보기용 직접 재생 가능한 URL 추출"""
        youtube_dl = __import__(youtube_dl_package)
        try:
            # 미리보기를 위해 다양한 포맷 시도 (mp4, hls 등)
            ydl_opts: Dict[str, Any] = {
                "format": "best[ext=mp4]/bestvideo[ext=mp4]+bestaudio[ext=m4a]/best",
                "logger": MyLogger(),
                "nocheckcertificate": True,
                "quiet": True,
                "js_runtimes": {"node": {"path": "/Users/yommi/.local/state/fnm_multishells/53824_1769161399333/bin/node"}},
            }
            with youtube_dl.YoutubeDL(ydl_opts) as ydl:
                info: Dict[str, Any] = ydl.extract_info(url, download=False)
                
                # 1. HLS 매니페스트 우선 (가장 안정적으로 오디오+비디오 제공)
                if info.get("manifest_url"):
                    return info["manifest_url"]
                
                # 2. 직접 URL (ydl_opts에서 지정한 best[ext=mp4] 결과)
                if info.get("url"):
                    return info["url"]
                
                # 3. 포맷 목록에서 적절한 것 찾기
                formats = info.get("formats", [])
                # 오디오와 비디오가 모두 있는 포맷 찾기
                combined_formats = [f for f in formats if f.get("vcodec") != "none" and f.get("acodec") != "none"]
                if combined_formats:
                    # 가장 좋은 화질의 결합 포맷 선택
                    return combined_formats[-1].get("url")
                
                return None
        except Exception as error:
            logger.error(f"미리보기 URL 추출 중 예외 발생: {error}")
            return None

    @staticmethod
    def get_version() -> str:
        """라이브러리 버전 확인"""
        __version__: str = __import__(
            f"{youtube_dl_package}.version", fromlist=["__version__"]
        ).__version__
        return __version__

    @staticmethod
    def get_info_dict(
        url: str, 
        proxy: Optional[str] = None, 
        cookiefile: Optional[str] = None, 
        http_headers: Optional[Dict[str, str]] = None, 
        cookiesfrombrowser: Optional[str] = None,
        **extra_opts
    ) -> Optional[Dict[str, Any]]:
        """비디오 메타데이터 정보 추출"""
        youtube_dl = __import__(youtube_dl_package)

        try:
            ydl_opts: Dict[str, Any] = {
                "logger": MyLogger(),
                "nocheckcertificate": True,
                "quiet": True,
                # JS 런타임 수동 지정 (유저 시스템 환경 반영)
                "js_runtimes": {"node": {"path": "/Users/yommi/.local/state/fnm_multishells/53824_1769161399333/bin/node"}},
            }
            # 기본값으로 extract_flat 적용 (명시적으로 override 가능)
            if "extract_flat" not in extra_opts:
                ydl_opts["extract_flat"] = True  # True = 모든 추출기에 적용
            
            if proxy:
                ydl_opts["proxy"] = proxy
            if cookiefile:
                ydl_opts["cookiefile"] = cookiefile
            if http_headers:
                ydl_opts["http_headers"] = http_headers
            if cookiesfrombrowser:
                ydl_opts["cookiesfrombrowser"] = (cookiesfrombrowser, None, None, None)
            
            # 추가 옵션 반영 (playliststart, playlistend 등)
            ydl_opts.update(extra_opts)
                
            with youtube_dl.YoutubeDL(ydl_opts) as ydl:
                info: Dict[str, Any] = ydl.extract_info(url, download=False)
        except Exception as error:
            logger.error(f"정보 추출 중 예외 발생: {error}")
            logger.error(traceback.format_exc())
            return None
        return ydl.sanitize_info(info)

    def my_hook(self, data: Dict[str, Any]) -> None:
        """진행률 업데이트 훅"""
        if self.status != Status.STOP:
            if data["status"] == "downloading":
                self.status = Status.DOWNLOADING
            elif data["status"] == "error":
                self.status = Status.ERROR
            elif data["status"] == "finished":
                self.status = Status.FINISHED
                
        if data["status"] != "error":
            self.filename = os.path.basename(data.get("filename", self.filename))
            self.progress_hooks["downloaded_bytes"] = data.get("downloaded_bytes")
            self.progress_hooks["total_bytes"] = data.get("total_bytes") or data.get("total_bytes_estimate")
            self.progress_hooks["eta"] = data.get("eta")
            self.progress_hooks["speed"] = data.get("speed")

    @property
    def status(self) -> Status:
        return self._status

    @status.setter
    def status(self, value: Status) -> None:
        self._status = value
        # Socket.IO를 통한 상태 업데이트 전송
        try:
            basic_module = P.get_module('basic')
            if basic_module:
                basic_module.socketio_emit("status", self)
        except Exception as e:
            logger.error(f"SocketIO 전송 에러: {e}")


class MyLogger:
    """yt-dlp의 로그를 가로채서 처리하는 클래성"""
    def debug(self, msg: str) -> None:
        # 진행 상황 관련 로그는 걸러냄
        if " ETA " in msg or "at" in msg and "B/s" in msg:
            return
        logger.debug(msg)

    def warning(self, msg: str) -> None:
        logger.warning(msg)

    def error(self, msg: str) -> None:
        logger.error(msg)