import type { WechatJssdkConfig, WechatJsapiPrepayParams } from '@dukang/shared-types';

export type WechatCodeSession = {
  openId: string;
  unionId?: string;
  sessionKey?: string;
  accessToken?: string;
};

export type WechatOAuthSession = {
  openId: string;
  unionId?: string;
  accessToken?: string;
  refreshToken?: string;
};

export type WechatOAuthUserInfo = {
  openId: string;
  nickname?: string;
  headImgUrl?: string;
  unionId?: string;
};

export type WechatPayNotifyResult = {
  transactionId: string;
  outTradeNo: string;
  tradeState: string;
  amountFen: number;
};

export interface IWechatProvider {
  isEnabled(): boolean;

  /** 是否为 preV1 Mock 实现（登录时可回落到演示账号） */
  isMock(): boolean;

  /** 微信支付是否已配置（商户号 + 证书） */
  isPayEnabled(): boolean;

  /** 当前商户号（用于日志/排查） */
  getMchId(): string;

  /** 小程序 code2session */
  code2Session(code: string, actorRef?: { refType: string; refId: bigint }): Promise<WechatCodeSession>;

  /** 公众号 H5 OAuth code 换 openId */
  oauth2AccessToken(code: string, actorRef?: { refType: string; refId: bigint }): Promise<WechatOAuthSession>;

  /** 公众号 OAuth access_token 拉取用户昵称头像（snsapi_userinfo） */
  fetchOAuthUserInfo(
    accessToken: string,
    openId: string,
    actorRef?: { refType: string; refId: bigint },
  ): Promise<WechatOAuthUserInfo>;

  /** JSSDK 签名配置 */
  createJssdkConfig(url: string, actorRef?: { refType: string; refId: bigint }): Promise<WechatJssdkConfig>;

  /** 构建公众号 OAuth 授权 URL */
  buildOAuthUrl(redirectUri: string, state: string, scope?: string): string;

  /** 小程序手机号 code 解密（或调用微信 getPhoneNumber 接口） */
  getPhoneNumberByCode(
    code: string,
    platform: 'mini' | 'h5',
    actorRef?: { refType: string; refId: bigint },
  ): Promise<string>;

  /** 创建 JSAPI 预支付参数（使用 WX_MCH_ID 统一下单） */
  createJsapiPrepay(params: {
    orderNo: string;
    description: string;
    amountFen: number;
    openId: string;
    notifyUrl: string;
    platform?: 'h5' | 'mini';
  }): Promise<WechatJsapiPrepayParams>;

  /** 解析并验签支付回调通知 */
  parsePayNotification(
    headers: Record<string, string | string[] | undefined>,
    rawBody: string,
  ): Promise<WechatPayNotifyResult>;
}