from typing import Any

from yuxi.channel.exceptions import (
    ChannelErrorClassification,
    ChannelPermanentError,
    ChannelRateLimitedError,
    ChannelRetryableError,
    ChannelValidationError,
)
from yuxi.channel.plugins.protocol import ChannelMeta, ChannelPlugin, InboundMedia, InboundMessage, OutboundMessage
from yuxi.channel.plugins.registry import get_registry
from yuxi.channel.ports import (
    AuthMixin,
    BindingMixin,
    ConfigMixin,
    InboundMixin,
    LifecycleMixin,
    MetaMixin,
    OutboundMixin,
    SecurityMixin,
    SessionMixin,
    StatusMixin,
    ThreadingMixin,
    TransportMixin,
)

_META_FIELDS = {
    "aliases",
    "capabilities",
    "delivery_mode",
    "transport_type",
    "ui_hints",
    "sort_weight",
    "icon",
    "description",
}


class _BaseChannelPlugin(
    MetaMixin,
    ConfigMixin,
    InboundMixin,
    OutboundMixin,
    TransportMixin,
    SecurityMixin,
    StatusMixin,
    LifecycleMixin,
    SessionMixin,
    AuthMixin,
    BindingMixin,
    ThreadingMixin,
):
    """提供 ChannelPlugin Protocol 的默认实现，允许通过适配器覆盖指定方法。"""

    def __init__(self, meta: ChannelMeta, adapters: dict[str, Any]) -> None:
        MetaMixin.__init__(self, meta)
        for name, impl in adapters.items():
            if callable(impl):
                setattr(self, name, impl)

    # === 动作交互（可选扩展点） ===
    def describe_actions(self, config: dict, inbound: InboundMessage) -> list[dict]:
        """描述当前消息可触发的动作；默认无动作。"""
        return []

    def handle_action(self, action: dict, config: dict, inbound: InboundMessage) -> dict | None:
        """执行动作；默认返回 None 表示未处理。"""
        return None

    # === 扫码配对（可选扩展点） ===
    def supports_scan_pairing(self, config: dict | None = None) -> bool:
        return bool(config.get("pairing", {}).get("mode") in ("qr", "both")) if config else False

    async def normalize_scan_event(
        self,
        request: Any,
        config: dict,
        account_id: str,
    ) -> InboundMessage | None:
        return None

    async def build_pairing_qr_reply(
        self,
        pairing_code: str,
        qr_content: str,
        config: dict,
        account_id: str,
    ) -> OutboundMessage:
        return OutboundMessage(
            content=f"请扫描下方二维码完成绑定：{pairing_code}",
            content_type="text",
        )

    # === 媒体附件 ===
    async def download_attachment(self, inbound: InboundMessage, media: InboundMedia) -> tuple[bytes, str] | None:
        return None

    # === Webhook 管理（可选扩展点） ===
    async def setup_webhook(self, config: dict, callback_url: str) -> bool:
        """向渠道平台注册 Webhook；默认返回 False，表示未实现。"""
        return False

    async def delete_webhook(self, config: dict) -> bool:
        """向渠道平台注销 Webhook；默认返回 False，表示未实现。"""
        return False

    # === 消息编辑与删除（可选扩展点） ===
    async def edit_message(
        self,
        channel_session_id: str,
        channel_message_id: str,
        new_payload: dict,
        config: dict | None = None,
    ) -> bool:
        """编辑已发送消息；默认返回 False，表示未实现。"""
        return False

    async def delete_message(
        self,
        channel_session_id: str,
        channel_message_id: str,
        config: dict | None = None,
    ) -> bool:
        """删除已发送消息；默认返回 False，表示未实现。"""
        return False

    # === 用户资料解析（可选扩展点） ===
    async def resolve_user_profile(self, sender_id: str, config: dict | None = None) -> dict | None:
        """解析发送者资料；默认返回 None，表示未实现。"""
        return None

    # === 入站/出站转换钩子（可选扩展点） ===
    async def transform_inbound(self, raw_event: dict, config: dict | None = None) -> dict:
        """在 normalize_inbound 之前转换原始事件；默认原样返回。"""
        return raw_event

    # === 投递异常分类（可选扩展点） ===
    def classify_error(
        self,
        exc: Exception,
        payload: dict | None = None,
    ) -> tuple[ChannelErrorClassification, int | None]:
        """对投递异常进行分类；默认按异常基类推断。"""
        if isinstance(exc, ChannelValidationError):
            return ChannelErrorClassification.PERMANENT, None
        if isinstance(exc, ChannelPermanentError):
            return ChannelErrorClassification.PERMANENT, None
        if isinstance(exc, ChannelRateLimitedError):
            return ChannelErrorClassification.RATE_LIMITED, exc.retry_after
        if isinstance(exc, ChannelRetryableError):
            return ChannelErrorClassification.RETRYABLE, None
        # 未知异常保守视为可重试
        return ChannelErrorClassification.RETRYABLE, None


def create_channel_plugin_base(
    channel_type: str,
    display_name: str,
    config_schema: dict,
    **adapters: Any,
) -> ChannelPlugin:
    meta_kwargs = {k: adapters.pop(k) for k in list(adapters.keys()) if k in _META_FIELDS}
    meta = ChannelMeta(
        channel_type=channel_type,
        display_name=display_name,
        config_schema=config_schema,
        **meta_kwargs,
    )
    return _BaseChannelPlugin(meta=meta, adapters=adapters)


def define_channel_plugin_entry(plugin: ChannelPlugin, register_mode: str = "full") -> None:
    registry = get_registry()
    if register_mode == "discovery":
        registry.register_primary(plugin)
        return
    registry.register(plugin)