"""
媒体识别管线 混入类。

从 ChainBase 拆出的识别域：原生模块识别路由、识别缓存回填、共享识别、
插件补充识别。方法经 MRO 解析，依赖 ChainBase 实例的 run_module/eventmanager
等协作对象。
"""
import copy
import threading
from dataclasses import dataclass
from enum import Enum, auto
from typing import Any, ClassVar, Generator, Optional, Protocol, TypeVar, cast

from app.application.configuration import get_configured_system_config
from app.application.music.observation import music_recognition_needs_confirmation
from app.chain._contracts import ChainRuntimeMixinHost
from app.domain.context import (
    MediaInfo,
    MusicAlbumInfo,
    MusicArtistInfo,
    MusicInfo,
)
from app.domain.meta.metabase import MetaBase
from app.domain.meta.metamusic import MetaMusic
from app.domain.music import (
    music_album_matches,
    music_artist_matches,
    music_title_matches,
    music_version_matches,
    music_year_matches,
)
from app.runtime.cache import async_fresh, fresh
from app.runtime.events import Event
from app.runtime.execution import run_in_threadpool
from app.runtime.log import logger
from app.schemas.category import ClassificationSelection
from app.schemas.media import normalize_media_source, resolve_media_identity
from app.schemas.types import ChainEventType, MediaSource, MediaType, SystemConfigKey

_ClassificationSubjectT = TypeVar(
    "_ClassificationSubjectT",
    MediaInfo,
    MusicInfo,
    MusicAlbumInfo,
    MusicArtistInfo,
)


class RecognitionSharePort(Protocol):
    """
    媒体识别链访问共享识别服务所需的最小端口。
    """

    def report_recognize_share(
            self,
            meta: Optional[MetaBase],
            mediainfo: Optional[MediaInfo | MusicInfo],
            keyword_meta: Optional[MetaBase] = None,
    ) -> bool:
        """
        同步上报共享识别结果。

        :param meta: 本地解析元数据，None 时由实现判断是否足够形成共享请求
        :param mediainfo: 准备上报的识别结果，None 或缺少有效身份时不形成有效上报
        :param keyword_meta: 原始标题线索，None 时使用 meta 中的线索
        :return: 服务端确认上报成功时为 True，无有效载荷或上报未成功时为 False
        """
        ...

    async def async_report_recognize_share(
            self,
            meta: Optional[MetaBase],
            mediainfo: Optional[MediaInfo | MusicInfo],
            keyword_meta: Optional[MetaBase] = None,
    ) -> bool:
        """
        异步上报共享识别结果。

        :param meta: 本地解析元数据，None 时由实现判断是否足够形成共享请求
        :param mediainfo: 准备上报的识别结果，None 或缺少有效身份时不形成有效上报
        :param keyword_meta: 原始标题线索，None 时使用 meta 中的线索
        :return: 服务端确认上报成功时为 True，无有效载荷或上报未成功时为 False
        """
        ...

    def query_recognize_share(
            self,
            meta: Optional[MetaBase],
            mtype: Optional[MediaType] = None,
            keyword_meta: Optional[MetaBase] = None,
            music_type: Optional[str] = None,
    ) -> Optional[dict[str, Any]]:
        """
        同步查询共享识别结果。

        :param meta: 用于构造查询线索的本地元数据，None 表示未提供
        :param mtype: 限定的媒体类型，None 时由元数据推断
        :param keyword_meta: 未被本地修正覆盖的原始标题线索，None 时使用 meta
        :param music_type: 限定音乐实体类型，None 时按元数据或服务默认规则选择
        :return: 共享服务返回的媒体身份字典，查询无有效结果时为 None
        """
        ...

    async def async_query_recognize_share(
            self,
            meta: Optional[MetaBase],
            mtype: Optional[MediaType] = None,
            keyword_meta: Optional[MetaBase] = None,
            music_type: Optional[str] = None,
    ) -> Optional[dict[str, Any]]:
        """
        异步查询共享识别结果。

        :param meta: 用于构造查询线索的本地元数据，None 表示未提供
        :param mtype: 限定的媒体类型，None 时由元数据推断
        :param keyword_meta: 未被本地修正覆盖的原始标题线索，None 时使用 meta
        :param music_type: 限定音乐实体类型，None 时按元数据或服务默认规则选择
        :return: 共享服务返回的媒体身份字典，查询无有效结果时为 None
        """
        ...

    def to_recognize_params(
            self,
            item: Optional[dict[str, Any]],
    ) -> Optional[dict[str, Any]]:
        """
        把共享结果转换为本地识别参数。

        :param item: 共享服务返回的媒体身份字典，允许为 None
        :return: 包含类型、来源、媒体标识与季号的本地参数，无有效来源或标识时为 None
        """
        ...


class _SystemConfigCounter(Protocol):
    """
    共享识别命中统计所需的最小原子计数端口。
    """

    def increment(self, key: SystemConfigKey, step: int = 1) -> int:
        """
        原子递增指定系统配置计数。

        :param key: 需要原子更新的系统配置计数键
        :param step: 本次增加的计数值，默认加一
        :return: 递增后的最新计数
        """
        ...


_recognition_share_lock = threading.RLock()
_recognition_share_port: Optional[RecognitionSharePort] = None


def configure_recognition_share_port(
        port: RecognitionSharePort,
) -> Optional[RecognitionSharePort]:
    """
    装配共享识别端口，并返回旧实现供隔离环境恢复。
    """
    global _recognition_share_port
    with _recognition_share_lock:
        previous = _recognition_share_port
        _recognition_share_port = port
    return previous


def reset_recognition_share_port(
        port: Optional[RecognitionSharePort] = None,
) -> None:
    """
    恢复指定共享识别端口；省略参数时回到未装配状态。
    """
    global _recognition_share_port
    with _recognition_share_lock:
        _recognition_share_port = port


def _recognition_share_snapshot() -> RecognitionSharePort:
    """
    获取当前共享识别端口，未装配时稳定失败。
    """
    with _recognition_share_lock:
        port = _recognition_share_port
    if port is None:
        raise RuntimeError("共享识别端口尚未由启动组合根装配")
    return port


@dataclass(frozen=True, slots=True)
class _RecognitionPlan:
    """
    冻结一次媒体识别请求的规范身份、模块参数和共享查询上下文。

    :param meta: 实际交给识别模块的解析元数据，None 表示未提供
    :param mtype: 限定的媒体类型，None 时由识别输入决定
    :param media_source: 规范化的媒体来源，None 表示未指定
    :param media_id: 对应来源的原生媒体标识，None 表示未指定
    :param episode_group: 电视剧剧集组标识，None 表示未指定
    :param cache: 是否允许复用识别缓存
    :param share_meta: 保留原始查询线索的共享识别元数据，None 时未单独提供
    :param music_type: 音乐实体类型，None 时沿用模块默认规则
    :param identity_valid: 显式媒体身份是否完整有效，无效时拒绝继续识别
    """

    meta: Optional[MetaBase]
    mtype: Optional[MediaType]
    media_source: Optional[MediaSource | str]
    media_id: Optional[str]
    episode_group: Optional[str]
    cache: bool
    share_meta: Optional[MetaBase]
    music_type: Optional[str]
    identity_valid: bool

    def module_kwargs(self) -> dict[str, Any]:
        """
        生成原生模块识别所需的稳定参数。
        """
        kwargs: dict[str, Any] = {
            "meta": self.meta,
            "mtype": self.mtype,
            "media_source": self.media_source,
            "media_id": self.media_id,
            "episode_group": self.episode_group,
            "cache": self.cache,
        }
        if self.music_type is not None:
            kwargs["music_type"] = self.music_type
        return kwargs

    def share_query_kwargs(self) -> dict[str, Any]:
        """
        生成共享识别查询参数，保持原始关键字与规范媒体类型。
        """
        kwargs: dict[str, Any] = {
            "meta": self.meta,
            "mtype": self.mtype,
            "keyword_meta": self.share_meta,
        }
        if self.music_type is not None:
            kwargs["music_type"] = self.music_type
        return kwargs

    def shared_module_kwargs(
            self,
            shared_params: dict[str, Any],
    ) -> dict[str, Any]:
        """
        把共享识别身份投影为第二次原生模块识别参数。
        """
        kwargs: dict[str, Any] = {
            "meta": self.meta,
            "mtype": shared_params.get("mtype") or self.mtype,
            "media_source": shared_params.get("media_source"),
            "media_id": shared_params.get("media_id"),
            "episode_group": self.episode_group,
            "cache": self.cache,
        }
        shared_music_type = shared_params.get("music_type") or self.music_type
        if shared_music_type is not None:
            kwargs["music_type"] = shared_music_type
        return kwargs


@dataclass(frozen=True, slots=True)
class _RecognitionOutcome:
    """
    表达候选结果是否终结识别，以及应保留的无身份回退结果。

    :param candidate: 本次识别候选，未获得结果时为 None
    :param fallback: 最早保留的无完整远端身份结果，无可用回退时为 None
    :param has_identity: 当前候选是否具备规范化来源和媒体标识
    """

    candidate: Optional[MediaInfo | MusicInfo]
    fallback: Optional[MediaInfo | MusicInfo]
    has_identity: bool

    @classmethod
    def decide(
            cls,
            candidate: Optional[MediaInfo | MusicInfo],
            fallback: Optional[MediaInfo | MusicInfo] = None,
    ) -> "_RecognitionOutcome":
        """
        按规范媒体身份决定终态，并稳定保留最早的有效回退结果。
        """
        media_source, media_id = resolve_media_identity(media=candidate)
        has_identity = bool(media_source and media_id)
        return cls(
            candidate=candidate,
            fallback=fallback or (candidate if candidate and not has_identity else None),
            has_identity=has_identity,
        )

    @property
    def result(self) -> Optional[MediaInfo | MusicInfo]:
        """
        返回已识别终态，未命中远端身份时返回保留的回退结果。
        """
        return self.candidate if self.has_identity else self.fallback

    @property
    def should_report(self) -> bool:
        """
        判断原生或插件终态是否需要上报共享识别。
        """
        return bool(
            self.has_identity
            and self.candidate
            and not getattr(self.candidate, "recognize_cache_hit", False)
        )


def _shared_music_candidate_matches(
        plan: _RecognitionPlan,
        candidate: Optional[MediaInfo | MusicInfo],
) -> bool:
    """
    共享音乐身份必须与本地文本证据一致，避免同名曲目跨艺人污染。

    共享服务只提供远端身份，第二次原生查询能够证明这个身份存在，却不能
    证明它属于当前文件。影视共享命中仍保持原有行为；音乐录音则至少核验
    文件标签或目录上下文提供的艺人、曲名和录音版本。
    """
    if not isinstance(plan.meta, MetaMusic) or not isinstance(candidate, MusicInfo):
        return True
    if plan.meta.artists and not music_artist_matches(candidate, plan.meta.artists):
        return False
    if plan.meta.title and not music_title_matches(candidate, plan.meta.title):
        return False
    if plan.meta.album and candidate.album and not music_album_matches(candidate, plan.meta.album):
        return False
    return music_version_matches(candidate, plan.meta) and music_year_matches(candidate, plan.meta)


def _validate_shared_music_candidate(
        plan: _RecognitionPlan,
        candidate: Optional[MediaInfo | MusicInfo],
) -> Optional[MediaInfo | MusicInfo]:
    """
    校验共享音乐候选；冲突时记录原因并回退到本地识别结果。
    """
    if _shared_music_candidate_matches(plan, candidate):
        return candidate
    logger.warning(
        "共享音乐识别候选与本地艺人、曲名或版本证据冲突，已忽略："
        f"{getattr(candidate, 'artist', None)} - {getattr(candidate, 'title', None)}"
    )
    return None


class _RecognitionAction(Enum):
    """
    标识媒体识别纯状态机请求同步或异步外壳执行的 I/O 动作。
    """

    # 调用内置模块识别媒体。
    NATIVE = auto()
    # 通过插件辅助事件补充识别。
    SUPPLEMENT = auto()
    # 向共享服务上报有效识别结果。
    REPORT = auto()
    # 查询共享服务中的媒体身份线索。
    QUERY_SHARE = auto()
    # 回填已确认的识别结果缓存。
    UPDATE_CACHE = auto()
    # 累计共享识别命中次数。
    RECORD_SHARE_HIT = auto()


@dataclass(frozen=True, slots=True)
class _RecognitionStep:
    """
    描述媒体识别状态机的一次 I/O 请求及其稳定调用参数。

    :param action: 需要同步或异步执行的识别、上报或缓存动作
    :param kwargs: 对应动作的命名调用参数
    :param cache: 调用原生识别时是否复用缓存，默认启用
    """

    action: _RecognitionAction
    kwargs: dict[str, Any]
    cache: bool = True


@dataclass(frozen=True, slots=True)
class _PluginRecognitionPlan:
    """
    冻结插件补充识别的事件类型、载荷与结果解析上下文。

    :param payload: 交给插件辅助识别事件的媒体上下文
    :param fallback: 插件未产生有效身份时保留的原始候选，允许为 None
    :param is_music: 是否按音乐事件和结果协议解析
    :param mtype: 原始请求限定的媒体类型，None 表示未限定
    :param music_type: 音乐实体类型，None 表示未指定
    """

    payload: dict[str, Any]
    fallback: Optional[MediaInfo | MusicInfo]
    is_music: bool
    mtype: Optional[MediaType]
    music_type: Optional[str]


class _RecognitionFinalizationOwner:
    """
    隔离完整识别结果的同步与异步分类收口。
    """

    def _finalize_recognition_result(
        self,
        mediainfo: Optional[_ClassificationSubjectT],
        *,
        effective_override: ClassificationSelection | None = None,
        refresh: bool = False,
        allow_enrichment: bool = True,
    ) -> Optional[_ClassificationSubjectT]:
        """
        统一复制并分类结果，离线整理可禁止外部补充而不绕过用户分类规则。
        """
        if mediainfo is None:
            return None
        service = getattr(cast(ChainRuntimeMixinHost, self), "classification_service", None)
        if service is None:
            return mediainfo
        return cast(
            _ClassificationSubjectT,
            service.finalize(
                mediainfo,
                effective_override=effective_override,
                refresh=refresh,
                **({"allow_enrichment": False} if not allow_enrichment else {}),
            ),
        )

    async def _async_finalize_recognition_result(
        self,
        mediainfo: Optional[_ClassificationSubjectT],
        *,
        effective_override: ClassificationSelection | None = None,
        refresh: bool = False,
        allow_enrichment: bool = True,
    ) -> Optional[_ClassificationSubjectT]:
        """
        异步复制并分类结果，保留调用方禁止外部补充的离线约束。
        """
        if mediainfo is None:
            return None
        service = getattr(cast(ChainRuntimeMixinHost, self), "classification_service", None)
        if service is None:
            return mediainfo
        return cast(
            _ClassificationSubjectT,
            await service.async_finalize(
                mediainfo,
                effective_override=effective_override,
                refresh=refresh,
                **({"allow_enrichment": False} if not allow_enrichment else {}),
            ),
        )


class _RecognitionPlanningMixin:
    """
    封装识别计划构建及宿主协议收窄。
    """

    __mixin_host_protocol__: ClassVar[Any] = ChainRuntimeMixinHost
    eventmanager: Any
    _finalize_recognition_result = cast(Any, _RecognitionFinalizationOwner._finalize_recognition_result)
    _async_finalize_recognition_result = cast(Any, _RecognitionFinalizationOwner._async_finalize_recognition_result)

    def _runtime_host(self) -> ChainRuntimeMixinHost:
        """
        把 MRO 注入的宿主能力收窄为识别混入类的静态协议。
        """
        return cast(ChainRuntimeMixinHost, self)

    @staticmethod
    def _build_recognition_plan(
            meta: Optional[MetaBase],
            mtype: Optional[MediaType],
            media_source: Optional[MediaSource | str],
            media_id: Optional[str],
            episode_group: Optional[str],
            cache: bool,
            share_meta: Optional[MetaBase],
            music_type: Optional[str],
    ) -> _RecognitionPlan:
        """
        规范请求级来源和显式身份，并生成同步、异步共用的识别计划。
        """
        explicit_identity = media_id is not None
        requested_source = normalize_media_source(media_source) or media_source
        resolved_source, resolved_id = resolve_media_identity(
            media=meta,
            media_source=media_source,
            media_id=media_id,
        )
        identity_valid = not explicit_identity or bool(resolved_source and resolved_id)
        planned_source: Optional[MediaSource | str] = resolved_source
        if not resolved_id and requested_source is not None:
            planned_source = requested_source
            meta_source, meta_id = resolve_media_identity(media=meta)
            if meta_id and meta_source == requested_source:
                planned_source, resolved_id = meta_source, meta_id
        planned_episode_group = episode_group
        if not planned_episode_group and meta is not None:
            planned_episode_group = getattr(meta, "episode_group", None)
        planned_type = mtype
        if (
                not planned_type
                and not (planned_source and resolved_id)
                and meta
                and meta.type in (MediaType.TV, MediaType.MOVIE, MediaType.MUSIC)
        ):
            planned_type = meta.type
        return _RecognitionPlan(
            meta=meta,
            mtype=planned_type,
            media_source=planned_source,
            media_id=resolved_id,
            episode_group=planned_episode_group,
            cache=cache,
            share_meta=share_meta or meta,
            music_type=music_type,
            identity_valid=identity_valid,
        )


class RecognitionMixin:
    """
    为媒体 Chain 提供本地识别、共享识别和插件补充识别流程。
    """

    __mixin_host_protocol__: ClassVar[Any] = ChainRuntimeMixinHost
    eventmanager: Any
    _finalize_recognition_result = cast(Any, _RecognitionFinalizationOwner._finalize_recognition_result)
    _async_finalize_recognition_result = cast(Any, _RecognitionFinalizationOwner._async_finalize_recognition_result)
    _runtime_host = cast(Any, _RecognitionPlanningMixin._runtime_host)
    _build_recognition_plan = staticmethod(_RecognitionPlanningMixin._build_recognition_plan)

    def _can_use_media_recognize_share(
            self,
            meta: Optional[MetaBase],
            media_source: Optional[MediaSource | str],
            media_id: Optional[str],
    ) -> bool:
        """
        仅在名称识别场景下使用共享识别，显式ID识别不再重复回查
        """
        return bool(
            self._runtime_host().runtime_config.media_recognize_share
            and meta
            and not media_source
            and not media_id
        )

    @staticmethod
    def _snapshot_recognize_cache_meta(meta: Optional[MetaBase]) -> Optional[MetaBase]:
        """
        保存共享识别前的本地缓存关键元数据，用于共享成功后回填正缓存覆盖负缓存。
        """
        if not meta:
            return None
        return copy.deepcopy(meta)

    def _update_local_recognize_cache(
            self,
            meta: Optional[MetaBase],
            mediainfo: Optional[MediaInfo | MusicInfo],
    ) -> None:
        """
        共享识别成功后回填本地识别缓存，避免名称负缓存导致后续重复回查共享。
        """
        if not meta or not mediainfo:
            return
        self._runtime_host().run_module(
            "update_recognize_cache",
            meta=meta,
            mediainfo=mediainfo,
        )

    async def _async_update_local_recognize_cache(
            self,
            meta: Optional[MetaBase],
            mediainfo: Optional[MediaInfo | MusicInfo],
    ) -> None:
        """
        异步回填本地识别缓存。
        """
        if not meta or not mediainfo:
            return
        await self._runtime_host().async_run_module(
            "async_update_recognize_cache",
            meta=meta,
            mediainfo=mediainfo,
        )

    @staticmethod
    def _record_media_recognize_share_hit() -> None:
        """
        记录一次共享媒体识别成功命中，统计失败不影响识别结果。
        """
        try:
            counter = cast(_SystemConfigCounter, get_configured_system_config())
            counter.increment(SystemConfigKey.MediaRecognizeShareCount)
        except Exception as err:
            logger.error(f"记录共享媒体识别命中次数失败：{str(err)}")

    def _run_native_media_recognize(
            self,
            module_kwargs: dict[str, Any],
            cache: bool,
    ) -> Optional[MediaInfo]:
        """
        执行同步原生媒体模块识别，具体媒体领域可覆写该路由钩子。
        """
        with fresh(not cache):
            return cast(
                Optional[MediaInfo],
                self._runtime_host().run_module("recognize_media", **module_kwargs),
            )

    async def _async_run_native_media_recognize(
            self,
            module_kwargs: dict[str, Any],
            cache: bool,
    ) -> Optional[MediaInfo]:
        """
        执行异步原生媒体模块识别，具体媒体领域可覆写该路由钩子。
        """
        async with async_fresh(not cache):
            return cast(
                Optional[MediaInfo],
                await self._runtime_host().async_run_module(
                    "async_recognize_media", **module_kwargs
                ),
            )

    @classmethod
    def _recognition_steps(
            cls,
            plan: _RecognitionPlan,
            use_share: bool,
    ) -> Generator[
        _RecognitionStep, Any, Optional[MediaInfo | MusicInfo]
    ]:
        """
        生成双 ABI 共用的识别状态机，仅把实际 I/O 留给入口外壳。
        """
        mediainfo = yield _RecognitionStep(
            action=_RecognitionAction.NATIVE,
            kwargs=plan.module_kwargs(),
            cache=plan.cache,
        )
        mediainfo = yield _RecognitionStep(
            action=_RecognitionAction.SUPPLEMENT,
            kwargs={
                "meta": plan.meta,
                "mtype": plan.mtype,
                "media_source": plan.media_source,
                "media_id": plan.media_id,
                "mediainfo": mediainfo,
                "music_type": plan.music_type,
            },
        )
        outcome = _RecognitionOutcome.decide(mediainfo)
        if music_recognition_needs_confirmation(outcome.result):
            return outcome.result
        if outcome.has_identity:
            if outcome.should_report:
                yield _RecognitionStep(
                    action=_RecognitionAction.REPORT,
                    kwargs={
                        "meta": plan.meta,
                        "mediainfo": outcome.candidate,
                        "keyword_meta": plan.share_meta,
                    },
                )
            return outcome.result

        if use_share:
            shared_cache_meta = cls._snapshot_recognize_cache_meta(plan.meta)
            shared_params = yield _RecognitionStep(
                action=_RecognitionAction.QUERY_SHARE,
                kwargs=plan.share_query_kwargs(),
            )
            if shared_params:
                mediainfo = yield _RecognitionStep(
                    action=_RecognitionAction.NATIVE,
                    kwargs=plan.shared_module_kwargs(shared_params),
                    cache=plan.cache,
                )
                mediainfo = _validate_shared_music_candidate(plan, mediainfo)
                outcome = _RecognitionOutcome.decide(mediainfo, outcome.fallback)
                if outcome.has_identity:
                    yield _RecognitionStep(
                        action=_RecognitionAction.UPDATE_CACHE,
                        kwargs={
                            "meta": shared_cache_meta,
                            "mediainfo": outcome.candidate,
                        },
                    )
                    yield _RecognitionStep(
                        action=_RecognitionAction.RECORD_SHARE_HIT,
                        kwargs={},
                    )
        return outcome.result

    def _run_recognition_steps(self, plan: _RecognitionPlan) -> Optional[MediaInfo]:
        """
        用同步端口驱动共享识别状态机。
        """
        steps = self._recognition_steps(
            plan,
            self._can_use_media_recognize_share(
                plan.share_meta, plan.media_source, plan.media_id
            ),
        )
        result: Any = None
        while True:
            try:
                step = steps.send(result)
            except StopIteration as completed:
                return cast(Optional[MediaInfo], completed.value)
            if step.action == _RecognitionAction.NATIVE:
                result = self._run_native_media_recognize(step.kwargs, step.cache)
            elif step.action == _RecognitionAction.SUPPLEMENT:
                result = self._supplement_media_recognize(**step.kwargs)
            elif step.action == _RecognitionAction.REPORT:
                result = _recognition_share_snapshot().report_recognize_share(
                    **step.kwargs
                )
            elif step.action == _RecognitionAction.QUERY_SHARE:
                share_port = _recognition_share_snapshot()
                shared_item = share_port.query_recognize_share(**step.kwargs)
                result = share_port.to_recognize_params(shared_item)
            elif step.action == _RecognitionAction.UPDATE_CACHE:
                self._update_local_recognize_cache(**step.kwargs)
                result = None
            else:
                result = self._record_media_recognize_share_hit()

    async def _async_run_recognition_steps(
            self, plan: _RecognitionPlan
    ) -> Optional[MediaInfo]:
        """
        用异步端口驱动共享识别状态机，不在线程间复用模块对象。
        """
        steps = self._recognition_steps(
            plan,
            self._can_use_media_recognize_share(
                plan.share_meta, plan.media_source, plan.media_id
            ),
        )
        result: Any = None
        while True:
            try:
                step = steps.send(result)
            except StopIteration as completed:
                return cast(Optional[MediaInfo], completed.value)
            if step.action == _RecognitionAction.NATIVE:
                result = await self._async_run_native_media_recognize(
                    step.kwargs, step.cache
                )
            elif step.action == _RecognitionAction.SUPPLEMENT:
                result = await self._async_supplement_media_recognize(**step.kwargs)
            elif step.action == _RecognitionAction.REPORT:
                result = await (
                    _recognition_share_snapshot().async_report_recognize_share(
                        **step.kwargs
                    )
                )
            elif step.action == _RecognitionAction.QUERY_SHARE:
                share_port = _recognition_share_snapshot()
                shared_item = await share_port.async_query_recognize_share(**step.kwargs)
                result = share_port.to_recognize_params(shared_item)
            elif step.action == _RecognitionAction.UPDATE_CACHE:
                await self._async_update_local_recognize_cache(**step.kwargs)
                result = None
            else:
                result = await run_in_threadpool(
                    self._record_media_recognize_share_hit
                )

    def recognize_media(
            self,
            meta: Optional[MetaBase] = None,
            mtype: Optional[MediaType] = None,
            media_source: Optional[MediaSource] = None,
            media_id: Optional[str] = None,
            episode_group: Optional[str] = None,
            cache: bool = True,
            share_meta: Optional[MetaBase] = None,
            music_type: Optional[str] = None,
    ) -> Optional[MediaInfo]:
        """
        识别媒体信息，不含Fanart图片

        :param meta:     识别的元数据
        :param share_meta: 共享识别查询/上报使用的原始元数据
        :param mtype:    识别的媒体类型
        :param media_source: 请求级识别数据源
        :param media_id: 数据源原生ID，必须与media_source成对提供
        :param episode_group: 剧集组
        :param cache:    是否使用缓存
        :param music_type: 音乐实体类型，显式音乐 ID 必须据此区分单曲与专辑
        :return: 识别的媒体信息，包括剧集信息
        """
        plan = self._build_recognition_plan(
            meta=meta,
            mtype=mtype,
            media_source=media_source,
            media_id=media_id,
            episode_group=episode_group,
            cache=cache,
            share_meta=share_meta,
            music_type=music_type,
        )
        if not plan.identity_valid:
            logger.warning("媒体识别需要同时提供有效的 media_source 和 media_id")
            return None
        return cast(Optional[MediaInfo], self._finalize_recognition_result(self._run_recognition_steps(plan)))

    async def async_recognize_media(
            self,
            meta: Optional[MetaBase] = None,
            mtype: Optional[MediaType] = None,
            media_source: Optional[MediaSource] = None,
            media_id: Optional[str] = None,
            episode_group: Optional[str] = None,
            cache: bool = True,
            share_meta: Optional[MetaBase] = None,
            music_type: Optional[str] = None,
    ) -> Optional[MediaInfo]:
        """
        识别媒体信息，不含Fanart图片（异步版本）

        :param meta:     识别的元数据
        :param share_meta: 共享识别查询/上报使用的原始元数据
        :param mtype:    识别的媒体类型
        :param media_source: 请求级识别数据源
        :param media_id: 数据源原生ID，必须与media_source成对提供
        :param episode_group: 剧集组
        :param cache:    是否使用缓存
        :param music_type: 音乐实体类型，显式音乐 ID 必须据此区分单曲与专辑
        :return: 识别的媒体信息，包括剧集信息
        """
        plan = self._build_recognition_plan(
            meta=meta,
            mtype=mtype,
            media_source=media_source,
            media_id=media_id,
            episode_group=episode_group,
            cache=cache,
            share_meta=share_meta,
            music_type=music_type,
        )
        if not plan.identity_valid:
            logger.warning("媒体识别需要同时提供有效的 media_source 和 media_id")
            return None
        return cast(Optional[MediaInfo], await self._async_finalize_recognition_result(await self._async_run_recognition_steps(plan)))

    @staticmethod
    def _media_recognize_plugin_payload(
            meta: Optional[MetaBase],
            mtype: Optional[MediaType],
            media_source: Optional[MediaSource | str],
            media_id: Optional[str],
            is_music: bool,
            music_type: Optional[str] = None,
    ) -> dict[str, Any]:
        """
        构造媒体识别链式事件的已知要素载荷，供插件匹配媒体信息；影视与音乐统一协议，
        仅要素字段随媒体类型不同
        """
        if is_music:
            return {
                "title": getattr(meta, "title", None),
                "artists": list(getattr(meta, "artists", None) or []),
                "album": getattr(meta, "album", None),
                "year": getattr(meta, "year", None),
                "isrc": getattr(meta, "isrc", None),
                "media_source": media_source,
                "media_id": media_id,
                "music_type": music_type,
            }
        return {
            "title": getattr(meta, "title", None) or getattr(meta, "name", None),
            "year": getattr(meta, "year", None),
            "season": getattr(meta, "begin_season", None),
            "type": mtype.value if isinstance(mtype, MediaType) else None,
            "media_source": media_source,
            "media_id": media_id,
        }

    @classmethod
    def _media_info_from_plugin(
            cls,
            event_data: object,
            is_music: bool,
            mtype: Optional[MediaType] = None,
            music_type: Optional[str] = None,
    ) -> Optional[MediaInfo | MusicInfo]:
        """
        解析插件返回的媒体信息，缺少数据源或身份字段的结果不采信；
        音乐构造 MusicInfo，影视构造 MediaInfo
        """
        if not isinstance(event_data, dict):
            return None
        plugin_info = event_data.get("mediainfo")
        if not isinstance(plugin_info, dict):
            return None
        if not plugin_info.get("media_source"):
            logger.warn("插件返回的媒体信息缺少数据源，忽略 ...")
            return None
        try:
            if is_music:
                if not plugin_info.get("media_id"):
                    logger.warn("插件返回的音乐媒体信息缺少媒体ID，忽略 ...")
                    return None
                music_info = MusicInfo.from_dict(plugin_info)
                if not music_info.media_source or not music_info.media_id:
                    return None
                if music_type and music_info.music_type != music_type:
                    logger.warn(
                        f"插件返回的音乐实体类型为 {music_info.music_type}，"
                        f"与请求的 {music_type} 不一致，忽略 ..."
                    )
                    return None
                return music_info
            # 影视：插件未提供类型时使用请求推断的类型
            if not plugin_info.get("type") and mtype:
                plugin_info = {**plugin_info, "type": mtype}
            media_info = MediaInfo()
            media_info.from_dict(plugin_info)
        except Exception as err:
            logger.warn(f"插件返回的媒体信息格式错误：{err}")
            return None
        # 影视与音乐统一要求远端身份，无身份的结果不采信，避免未验证结果进入识别管线
        if not media_info.media_source or not cls._media_info_has_identity(media_info):
            logger.warn("插件返回的媒体信息缺少远端身份，忽略 ...")
            return None
        return media_info

    @staticmethod
    def _media_info_has_identity(
            mediainfo: Optional[MediaInfo | MusicInfo],
    ) -> bool:
        """
        判断媒体信息是否具备完整的规范媒体身份。
        """
        return _RecognitionOutcome.decide(mediainfo).has_identity

    def _build_plugin_recognition_plan(
            self,
            meta: Optional[MetaBase],
            mtype: Optional[MediaType],
            media_source: Optional[MediaSource | str],
            media_id: Optional[str],
            mediainfo: Optional[MediaInfo | MusicInfo],
            music_type: Optional[str],
    ) -> Optional[_PluginRecognitionPlan]:
        """
        为缺少规范身份的候选结果生成插件补充识别计划。
        """
        if _RecognitionOutcome.decide(mediainfo).has_identity or music_recognition_needs_confirmation(mediainfo):
            return None
        is_music = (
            isinstance(meta, MetaMusic)
            or mtype == MediaType.MUSIC
            or isinstance(mediainfo, MusicInfo)
        )
        return _PluginRecognitionPlan(
            payload=self._media_recognize_plugin_payload(
                meta, mtype, media_source, media_id, is_music, music_type
            ),
            fallback=mediainfo,
            is_music=is_music,
            mtype=mtype,
            music_type=music_type,
        )

    def _apply_plugin_recognition_result(
            self,
            plan: _PluginRecognitionPlan,
            result: Optional[Event],
    ) -> Optional[MediaInfo | MusicInfo]:
        """
        解析插件事件结果；无响应或非法身份时稳定保留原候选。
        """
        if not result:
            return plan.fallback
        plugin_info = self._media_info_from_plugin(
            result.event_data or {},
            plan.is_music,
            plan.mtype,
            plan.music_type,
        )
        if not plugin_info:
            return plan.fallback
        logger.info(
            f"插件补充媒体识别成功：{plugin_info.title}"
            f"（{plugin_info.media_source}:{plugin_info.media_id}）"
        )
        return plugin_info

    def _supplement_media_recognize(
            self, meta: Optional[MetaBase],
            mtype: Optional[MediaType],
            media_source: Optional[MediaSource | str],
            media_id: Optional[str],
            mediainfo: Optional[MediaInfo | MusicInfo],
            music_type: Optional[str] = None,
    ) -> Optional[MediaInfo | MusicInfo]:
        """
        媒体识别插件补充（影视与音乐统一）：原生模块未给出带远端身份的结果时，
        广播媒体识别链式事件，允许插件（如第三方媒体源）按已知要素匹配并返回标准信息
        """
        plan = self._build_plugin_recognition_plan(
            meta=meta,
            mtype=mtype,
            media_source=media_source,
            media_id=media_id,
            mediainfo=mediainfo,
            music_type=music_type,
        )
        if plan is None:
            return mediainfo
        event_type = (
            ChainEventType.MusicMediaRecognize
            if plan.is_music
            else ChainEventType.MediaRecognize
        )
        if not self.eventmanager.check(event_type):
            return mediainfo
        result: Event = self.eventmanager.send_event(
            event_type,
            plan.payload,
        )
        return self._apply_plugin_recognition_result(plan, result)

    async def _async_supplement_media_recognize(
            self, meta: Optional[MetaBase],
            mtype: Optional[MediaType],
            media_source: Optional[MediaSource | str],
            media_id: Optional[str],
            mediainfo: Optional[MediaInfo | MusicInfo],
            music_type: Optional[str] = None,
    ) -> Optional[MediaInfo | MusicInfo]:
        """
        媒体识别插件补充的异步版本，影视与音乐统一流程
        """
        plan = self._build_plugin_recognition_plan(
            meta=meta,
            mtype=mtype,
            media_source=media_source,
            media_id=media_id,
            mediainfo=mediainfo,
            music_type=music_type,
        )
        if plan is None:
            return mediainfo
        event_type = (
            ChainEventType.MusicMediaRecognize
            if plan.is_music
            else ChainEventType.MediaRecognize
        )
        if not self.eventmanager.check(event_type):
            return mediainfo
        result: Event = await self.eventmanager.async_send_event(
            event_type,
            plan.payload,
        )
        return self._apply_plugin_recognition_result(plan, result)