from pathlib import Path
from typing import Optional, Tuple
from xml.dom import minidom

from app.runtime.settings import RuntimeSettingsCompat

settings = RuntimeSettingsCompat()
from app.domain.context import MediaInfo
from app.domain.meta.metabase import MetaBase
from app.schemas.types import MediaType
from app.foundation.dom import DomUtils
from app.modules.themoviedb.tmdbapi import TmdbApi


class TmdbScraper:
    _meta_tmdb = None
    _img_tmdb = None

    @property
    def default_tmdb(self):
        """
        获取元数据TMDB Api
        """
        if not self._meta_tmdb:
            self._meta_tmdb = TmdbApi(language=settings.TMDB_LOCALE)
        return self._meta_tmdb

    def original_tmdb(self, mediainfo: Optional[MediaInfo] = None):
        """
        获取图片TMDB Api
        """
        if settings.TMDB_SCRAP_ORIGINAL_IMAGE and mediainfo:
            return TmdbApi(language=mediainfo.original_language)
        return self.default_tmdb

    def get_metadata_nfo(
        self,
        meta: MetaBase,
        mediainfo: MediaInfo,
        season: Optional[int] = None,
        episode: Optional[int] = None,
    ) -> Optional[str]:
        """
        获取NFO文件内容文本
        :param meta: 元数据
        :param mediainfo: 媒体信息
        :param season: 季号
        :param episode: 集号
        """
        if mediainfo.type == MediaType.MOVIE:
            # 电影元数据文件
            doc = self.__gen_movie_nfo_file(mediainfo=mediainfo)
        else:
            if season is not None:
                # 查询季信息
                if mediainfo.episode_group:
                    seasoninfo = self.default_tmdb.get_tv_group_detail(
                        mediainfo.episode_group, season=season
                    )
                else:
                    seasoninfo = self.default_tmdb.get_tv_season_detail(
                        mediainfo.tmdb_id, season=season
                    )
                if episode:
                    # 集元数据文件
                    episodeinfo = self.__get_episode_detail(
                        seasoninfo, meta.begin_episode
                    )
                    doc = self.__gen_tv_episode_nfo_file(
                        episodeinfo=episodeinfo,
                        tmdbid=mediainfo.tmdb_id,
                        season=season,
                        episode=episode,
                    )
                else:
                    # 季元数据文件
                    doc = self.__gen_tv_season_nfo_file(
                        seasoninfo=seasoninfo, season=season
                    )
            else:
                # 电视剧元数据文件
                doc = self.__gen_tv_nfo_file(mediainfo=mediainfo)
        if doc:
            return doc.toprettyxml(indent="  ", encoding="utf-8")  # noqa

        return None

    def get_metadata_img(
        self,
        mediainfo: MediaInfo,
        season: Optional[int] = None,
        episode: Optional[int] = None,
    ) -> dict:
        """
        获取图片名称和url
        :param mediainfo: 媒体信息
        :param season: 季号
        :param episode: 集号
        """
        images = {}
        if season is not None:
            # 只需要季集的图片
            if episode:
                # 集的图片
                if mediainfo.episode_group:
                    seasoninfo = self.original_tmdb(mediainfo).get_tv_group_detail(
                        mediainfo.episode_group, season
                    )
                else:
                    seasoninfo = self.original_tmdb(mediainfo).get_tv_season_detail(
                        mediainfo.tmdb_id, season
                    )
                if seasoninfo:
                    episodeinfo = self.__get_episode_detail(seasoninfo, episode)
                    if still_path := episodeinfo.get("still_path"):
                        # TMDB集still图片
                        ext = Path(still_path).suffix
                        still_name = f"episode-thumb{ext}"
                        still_url = settings.TMDB_IMAGE_URL(still_path)
                        images[still_name] = still_url
            else:
                # 季的图片
                seasoninfo = self.original_tmdb(mediainfo).get_tv_season_detail(
                    mediainfo.tmdb_id, season
                )
                if seasoninfo:
                    # TMDB季poster图片
                    poster_name, poster_url = self.get_season_poster(seasoninfo, season)
                    if poster_name and poster_url:
                        images[poster_name] = poster_url
        else:
            self.__ensure_main_images(mediainfo)
            # 获取媒体信息中原有图片
            for attr_name, attr_value in vars(mediainfo).items():
                if (
                    attr_value
                    and attr_name.endswith("_path")
                    and isinstance(attr_value, str)
                    and attr_value.startswith("http")
                ):
                    image_name = (
                        attr_name.replace("_path", "") + Path(attr_value).suffix
                    )
                    images[image_name] = attr_value

            # 替换原语言Poster
            if settings.TMDB_SCRAP_ORIGINAL_IMAGE:
                _mediainfo = self.original_tmdb(mediainfo).get_info(
                    mediainfo.type, mediainfo.tmdb_id
                )
                if _mediainfo:
                    for attr_name, attr_value in _mediainfo.items():
                        if attr_name.endswith("_path") and attr_value is not None:
                            image_url = settings.TMDB_IMAGE_URL(attr_value)
                            image_name = (
                                attr_name.replace("_path", "") + Path(image_url).suffix
                            )
                            images[image_name] = image_url
        return images

    def __ensure_main_images(self, mediainfo: MediaInfo) -> None:
        """
        主媒体图片缺失时从 TMDB images 接口回填，避免当前语言没有图时只生成 NFO。
        """
        if not mediainfo or not mediainfo.tmdb_id:
            return
        if mediainfo.poster_path and mediainfo.backdrop_path:
            return
        if mediainfo.type == MediaType.MOVIE:
            image_info = self.default_tmdb.get_movie_images(
                mediainfo.tmdb_id,
                original_language=mediainfo.original_language,
            )
        else:
            image_info = self.default_tmdb.get_tv_images(
                mediainfo.tmdb_id,
                original_language=mediainfo.original_language,
            )
        if not image_info:
            return
        if not mediainfo.poster_path:
            poster_path = self.__pick_best_image_path(image_info.get("posters"))
            if poster_path:
                mediainfo.poster_path = settings.TMDB_IMAGE_URL(poster_path)
        if not mediainfo.backdrop_path:
            backdrop_path = self.__pick_best_image_path(image_info.get("backdrops"))
            if backdrop_path:
                mediainfo.backdrop_path = settings.TMDB_IMAGE_URL(backdrop_path)

    @staticmethod
    def __pick_best_image_path(images: list) -> Optional[str]:
        """
        从 TMDB 图片列表中选择评分和投票数最高的一张。
        """
        if not images:
            return None
        images = sorted(
            images,
            key=lambda item: (
                item.get("vote_average") or 0,
                item.get("vote_count") or 0,
            ),
            reverse=True,
        )
        return images[0].get("file_path")

    @staticmethod
    def get_season_poster(seasoninfo: dict, season: int) -> Tuple[str, str]:
        """
        获取季的海报
        """
        # TMDB季poster图片
        sea_seq = str(season).rjust(2, "0")
        if poster_path := seasoninfo.get("poster_path"):
            # 后缀
            ext = Path(poster_path).suffix
            # URL
            url = settings.TMDB_IMAGE_URL(poster_path)
            # S0海报格式不同
            if season == 0:
                image_name = f"season-specials-poster{ext}"
            else:
                image_name = f"season{sea_seq}-poster{ext}"
            return image_name, url
        return "", ""

    @staticmethod
    def __get_episode_detail(seasoninfo: dict, episode: int) -> dict:
        """
        根据季信息获取集的信息
        """
        for _episode_info in seasoninfo.get("episodes") or []:
            if _episode_info.get("episode_number") == episode:
                return _episode_info
        return {}

    @staticmethod
    def __gen_common_nfo(
        mediainfo: MediaInfo, doc: minidom.Document, root: minidom.Element
    ):
        """
        生成公共NFO
        """
        # TMDB
        DomUtils.add_node(doc, root, "tmdbid", mediainfo.tmdb_id or "")
        uniqueid_tmdb = DomUtils.add_node(
            doc, root, "uniqueid", mediainfo.tmdb_id or ""
        )
        uniqueid_tmdb.setAttribute("type", "tmdb")
        uniqueid_tmdb.setAttribute("default", "true")
        # TVDB
        if mediainfo.tvdb_id:
            DomUtils.add_node(doc, root, "tvdbid", str(mediainfo.tvdb_id))
            uniqueid_tvdb = DomUtils.add_node(
                doc, root, "uniqueid", str(mediainfo.tvdb_id)
            )
            uniqueid_tvdb.setAttribute("type", "tvdb")
        # IMDB
        if mediainfo.imdb_id:
            DomUtils.add_node(doc, root, "imdbid", mediainfo.imdb_id)
            uniqueid_imdb = DomUtils.add_node(doc, root, "uniqueid", mediainfo.imdb_id)
            uniqueid_imdb.setAttribute("type", "imdb")
            uniqueid_imdb.setAttribute("default", "true")
            uniqueid_tmdb.setAttribute("default", "false")

        # 简介
        xplot = DomUtils.add_node(doc, root, "plot")
        xplot.appendChild(doc.createCDATASection(mediainfo.overview or ""))
        xoutline = DomUtils.add_node(doc, root, "outline")
        xoutline.appendChild(doc.createCDATASection(mediainfo.overview or ""))
        # 导演
        for director in mediainfo.directors:
            xdirector = DomUtils.add_node(
                doc, root, "director", director.get("name") or ""
            )
            xdirector.setAttribute("tmdbid", str(director.get("id") or ""))
        # 演员
        for actor in mediainfo.actors:
            # 获取中文名
            xactor = DomUtils.add_node(doc, root, "actor")
            DomUtils.add_node(doc, xactor, "name", actor.get("name") or "")
            DomUtils.add_node(doc, xactor, "type", "Actor")
            DomUtils.add_node(
                doc, xactor, "role", actor.get("character") or actor.get("role") or ""
            )
            DomUtils.add_node(doc, xactor, "tmdbid", actor.get("id") or "")
            if profile_path := actor.get("profile_path"):
                DomUtils.add_node(
                    doc, xactor, "thumb", settings.TMDB_IMAGE_URL(profile_path)
                )
            DomUtils.add_node(
                doc,
                xactor,
                "profile",
                f"https://www.themoviedb.org/person/{actor.get('id')}",
            )
        # 风格
        genres = mediainfo.genres or []
        for genre in genres:
            DomUtils.add_node(doc, root, "genre", genre.get("name") or "")
        # 评分
        DomUtils.add_node(doc, root, "rating", mediainfo.vote_average or "0")
        # 内容分级
        if content_rating := mediainfo.content_rating:
            DomUtils.add_node(doc, root, "mpaa", content_rating)
        # 制作公司
        for company in mediainfo.production_companies or []:
            if company.get("name"):
                DomUtils.add_node(doc, root, "studio", company.get("name"))
        # 制作国家
        for country in mediainfo.production_countries or []:
            if country.get("name"):
                DomUtils.add_node(doc, root, "country", country.get("name"))
        # 时长
        if mediainfo.runtime:
            DomUtils.add_node(doc, root, "runtime", str(mediainfo.runtime))

        return doc

    def __gen_movie_nfo_file(self, mediainfo: MediaInfo) -> minidom.Document:
        """
        生成电影的NFO描述文件
        :param mediainfo: 识别后的媒体信息
        """
        # 开始生成XML
        doc = minidom.Document()
        root = DomUtils.add_node(doc, doc, "movie")
        # 公共部分
        doc = self.__gen_common_nfo(mediainfo=mediainfo, doc=doc, root=root)
        # 标题
        DomUtils.add_node(doc, root, "title", mediainfo.title or "")
        DomUtils.add_node(doc, root, "originaltitle", mediainfo.original_title or "")
        # 发布日期
        DomUtils.add_node(doc, root, "premiered", mediainfo.release_date or "")
        # 年份
        DomUtils.add_node(doc, root, "year", mediainfo.year or "")
        return doc

    def __gen_tv_nfo_file(self, mediainfo: MediaInfo) -> minidom.Document:
        """
        生成电视剧的NFO描述文件
        :param mediainfo: 媒体信息
        """
        # 开始生成XML
        doc = minidom.Document()
        root = DomUtils.add_node(doc, doc, "tvshow")
        # 公共部分
        doc = self.__gen_common_nfo(mediainfo=mediainfo, doc=doc, root=root)
        # 标题
        DomUtils.add_node(doc, root, "title", mediainfo.title or "")
        DomUtils.add_node(doc, root, "originaltitle", mediainfo.original_title or "")
        # 发布日期
        DomUtils.add_node(doc, root, "premiered", mediainfo.release_date or "")
        # 年份
        DomUtils.add_node(doc, root, "year", mediainfo.year or "")
        DomUtils.add_node(doc, root, "season", "-1")
        DomUtils.add_node(doc, root, "episode", "-1")

        return doc

    @staticmethod
    def __gen_tv_season_nfo_file(seasoninfo: dict, season: int) -> minidom.Document:
        """
        生成电视剧季的NFO描述文件
        :param seasoninfo: TMDB季媒体信息
        :param season: 季号
        """
        doc = minidom.Document()
        root = DomUtils.add_node(doc, doc, "season")
        # 简介
        xplot = DomUtils.add_node(doc, root, "plot")
        xplot.appendChild(doc.createCDATASection(seasoninfo.get("overview") or ""))
        xoutline = DomUtils.add_node(doc, root, "outline")
        xoutline.appendChild(doc.createCDATASection(seasoninfo.get("overview") or ""))
        # 标题
        DomUtils.add_node(
            doc, root, "title", seasoninfo.get("name") or "季 %s" % season
        )
        # 发行日期
        DomUtils.add_node(doc, root, "premiered", seasoninfo.get("air_date") or "")
        DomUtils.add_node(doc, root, "releasedate", seasoninfo.get("air_date") or "")
        # 发行年份
        DomUtils.add_node(
            doc,
            root,
            "year",
            seasoninfo.get("air_date")[:4] if seasoninfo.get("air_date") else "",
        )
        # seasonnumber
        DomUtils.add_node(doc, root, "seasonnumber", str(season))
        return doc

    @staticmethod
    def __gen_tv_episode_nfo_file(
        tmdbid: int, episodeinfo: dict, season: int, episode: int
    ) -> minidom.Document:
        """
        生成电视剧集的NFO描述文件
        :param tmdbid: TMDBID
        :param episodeinfo: 集TMDB元数据
        :param season: 季号
        :param episode: 集号
        """
        # 开始生成集的信息
        doc = minidom.Document()
        root = DomUtils.add_node(doc, doc, "episodedetails")
        # TMDBID
        uniqueid = DomUtils.add_node(doc, root, "uniqueid", str(episodeinfo.get("id")))
        uniqueid.setAttribute("type", "tmdb")
        uniqueid.setAttribute("default", "true")
        # tmdbid
        # 应与uniqueid一致 使用剧集id 否则jellyfin/emby会将此id覆盖上面的uniqueid
        DomUtils.add_node(doc, root, "tmdbid", str(episodeinfo.get("id")))
        # 标题
        DomUtils.add_node(
            doc, root, "title", episodeinfo.get("name") or "第 %s 集" % episode
        )
        # 简介
        xplot = DomUtils.add_node(doc, root, "plot")
        xplot.appendChild(doc.createCDATASection(episodeinfo.get("overview") or ""))
        xoutline = DomUtils.add_node(doc, root, "outline")
        xoutline.appendChild(doc.createCDATASection(episodeinfo.get("overview") or ""))
        # 发布日期
        DomUtils.add_node(doc, root, "aired", episodeinfo.get("air_date") or "")
        # 年份
        DomUtils.add_node(
            doc,
            root,
            "year",
            episodeinfo.get("air_date")[:4] if episodeinfo.get("air_date") else "",
        )
        # 季
        DomUtils.add_node(doc, root, "season", str(season))
        # 集
        DomUtils.add_node(doc, root, "episode", str(episode))
        # 评分
        DomUtils.add_node(doc, root, "rating", episodeinfo.get("vote_average") or "0")
        # 导演
        directors = episodeinfo.get("crew") or []
        for director in directors:
            if director.get("known_for_department") == "Directing":
                xdirector = DomUtils.add_node(
                    doc, root, "director", director.get("name") or ""
                )
                xdirector.setAttribute("tmdbid", str(director.get("id") or ""))
        # 演员
        actors = episodeinfo.get("guest_stars") or []
        for actor in actors:
            if actor.get("known_for_department") == "Acting":
                xactor = DomUtils.add_node(doc, root, "actor")
                DomUtils.add_node(doc, xactor, "name", actor.get("name") or "")
                DomUtils.add_node(doc, xactor, "type", "Actor")
                DomUtils.add_node(doc, xactor, "tmdbid", actor.get("id") or "")
                if profile_path := actor.get("profile_path"):
                    DomUtils.add_node(
                        doc, xactor, "thumb", settings.TMDB_IMAGE_URL(profile_path)
                    )
                DomUtils.add_node(
                    doc,
                    xactor,
                    "profile",
                    f"https://www.themoviedb.org/person/{actor.get('id')}",
                )
        return doc