import os
import warnings

from yuxi.channel.extensions.wechat_mp.types import WeChatAccount


class WeChatMPConfig:
    ENV_MAP = {
        "app_id": "WECHAT_MP_APP_ID",
        "app_secret": "WECHAT_MP_APP_SECRET",
        "token": "WECHAT_MP_TOKEN",
        "encoding_aes_key": "WECHAT_MP_ENCODING_AES_KEY",
        "reply_mode": "WECHAT_MP_REPLY_MODE",
        "subscribe_msg": "WECHAT_MP_SUBSCRIBE_MSG",
        "remove_markdown": "WECHAT_MP_REMOVE_MD",
    }

    LEGACY_ENV_MAP = {
        "app_id": "WECHAT_APP_ID",
        "app_secret": "WECHAT_APP_SECRET",
        "token": "WECHAT_TOKEN",
        "encoding_aes_key": "WECHAT_ENCODING_AES_KEY",
        "reply_mode": "WECHAT_REPLY_MODE",
        "subscribe_msg": "WECHAT_SUBSCRIBE_MSG",
        "remove_markdown": "WECHAT_REMOVE_MD",
    }

    def list_account_ids(self, config: dict | None = None) -> list[str]:
        if self._resolve_app_id():
            return ["default"]
        return []

    def resolve_account(self, account_id: str = "default") -> WeChatAccount:
        app_id = self._resolve_app_id()
        return WeChatAccount(
            account_id=account_id,
            app_id=app_id or "",
            app_secret=self._env_or_config("app_secret") or "",
            token=self._env_or_config("token") or "",
            encoding_aes_key=self._env_or_config("encoding_aes_key") or "",
            dm_policy=self._env_or_config("dm_policy") or "open",
            reply_mode=self._env_or_config("reply_mode") or "active",
            subscribe_msg=self._env_or_config("subscribe_msg") or "",
            remove_markdown=self._env_or_config("remove_markdown") != "false",
        )

    def is_configured(self, account: dict | None = None) -> bool:
        return bool(
            self._resolve_app_id()
            and self._env_or_config("app_secret")
            and self._env_or_config("token")
            and self._env_or_config("encoding_aes_key")
        )

    def _resolve_app_id(self) -> str | None:
        return self._env_or_config("app_id")

    def _env_or_config(self, key: str) -> str | None:
        env_key = self.ENV_MAP.get(key, "")
        if env_key:
            val = os.getenv(env_key)
            if val:
                return val
        legacy_key = self.LEGACY_ENV_MAP.get(key, "")
        if legacy_key:
            val = os.getenv(legacy_key)
            if val:
                warnings.warn(
                    f"环境变量 {legacy_key} 已废弃，请使用 {env_key}",
                    DeprecationWarning,
                    stacklevel=3,
                )
                return val
        return None

    def config_schema(self) -> dict:
        return {
            "$schema": "https://json-schema.org/draft-07/schema#",
            "type": "object",
            "title": "微信公众号渠道配置",
            "properties": {
                "app_id": {
                    "type": "string",
                    "title": "AppID",
                    "description": "微信公众号 AppID",
                },
                "app_secret": {
                    "type": "string",
                    "title": "AppSecret",
                    "x-ui-password": True,
                    "description": "微信公众号 AppSecret",
                },
                "token": {
                    "type": "string",
                    "title": "Token",
                    "description": "消息签名 Token（自定义字符串）",
                },
                "encoding_aes_key": {
                    "type": "string",
                    "title": "EncodingAESKey",
                    "x-ui-password": True,
                    "description": "消息加解密密钥（43 字符）",
                },
                "dm_policy": {
                    "type": "string",
                    "enum": ["open", "pairing", "allowlist", "disabled"],
                    "default": "open",
                    "title": "DM 策略",
                },
                "reply_mode": {
                    "type": "string",
                    "enum": ["passive", "active"],
                    "default": "active",
                    "title": "回复模式",
                    "description": "passive=被动回复(未认证订阅号), active=客服消息(已认证)",
                },
                "subscribe_msg": {
                    "type": "string",
                    "title": "关注欢迎语",
                    "description": "用户关注公众号后自动回复的文本",
                },
                "remove_markdown": {
                    "type": "boolean",
                    "default": True,
                    "title": "移除 Markdown 格式",
                    "description": "自动移除 AI 回复中的 Markdown 符号",
                },
            },
            "required": ["app_id", "app_secret", "token", "encoding_aes_key"],
        }