export interface Cache {
  /**
   * @update 获取缓存
   */
  get(key: string): Promise<any>;
  /**
   * @update 设置缓存
   */
  set(key: string, value: any): Promise<any>;
  /**
   * @update 删除缓存
   */
  del(): Promise<void>;
  /**
   * 初始化
   */
  init?: () => Promise<any>;
}
type User = {
  avatar?: string;
  description?: string;
  id?: string;
  needChangePassword?: boolean;
  orgs?: string[];
  type?: string;
  username?: string;
};

export type CacheLoginUser = {
  user?: User;
  id?: string;
  accessToken?: string;
  refreshToken?: string;
  accessTokenExpiresIn?: number;
  createdAt?: number;
};
type CacheLogin = {
  loginUsers: CacheLoginUser[];
} & CacheLoginUser;

export type CacheStore<T extends Cache = Cache> = {
  name: string;
  /**
   * 缓存数据
   * @important 需要先调用init
   */
  cacheData: CacheLogin;
  /**
   * 实际操作的cache, 需要先调用init
   */
  cache: T;

  /**
   * 设置当前用户
   */
  setLoginUser(user: CacheLoginUser): Promise<void>;
  /**
   * 获取当前用户
   */
  getCurrentUser(): Promise<User>;
  /**
   * 获取当前用户列表
   */
  getCurrentUserList(): Promise<CacheLoginUser[]>;
  /**
   * 获取缓存的refreshToken
   */
  getRefreshToken(): Promise<string>;
  /**
   * 获取缓存的accessToken
   */
  getAccessToken(): Promise<string>;
  /**
   * 清除当前用户
   */
  clearCurrentUser(): Promise<void>;
  /**
   * 清除所有用户
   */
  clearAll(): Promise<void>;

  getValue(): Promise<CacheLogin>;
  setValue(value: CacheLogin): Promise<CacheLogin>;
  delValue(): Promise<void>;
  init(): Promise<CacheLogin>;
  getIsExpired(): Promise<boolean>;
};

export type LoginCacheStoreOpts<T extends Cache = Cache> = {
  name: string;
  cache: T;
};
export class LoginCacheStore<T extends Cache = Cache> implements CacheStore<T> {
  cache: T;
  name: string;
  cacheData: CacheLogin;
  constructor(opts: LoginCacheStoreOpts<T>) {
    if (!opts.cache) {
      throw new Error('cache is required');
    }
    // @ts-ignore
    this.cache = opts.cache;
    this.cacheData = {
      loginUsers: [],
      user: undefined,
      id: undefined,
      accessToken: undefined,
      refreshToken: undefined,
    };
    this.name = opts.name;
  }
  /**
   * 设置缓存
   * @param key
   * @param value
   * @returns
   */
  async setValue(value: CacheLogin) {
    await this.cache.set(this.name, value);
    this.cacheData = value;
    return value;
  }
  /**
   * 删除缓存
   */
  async delValue() {
    await this.cache.del();
    this.cacheData = {
      loginUsers: [],
      user: undefined,
      id: undefined,
      accessToken: undefined,
      refreshToken: undefined,
    };
  }
  getValue(): Promise<CacheLogin> {
    return this.cache.get(this.name);
  }
  /**
   * 初始化,设置默认值
   */
  async init() {
    const defaultData: CacheLogin = {
      loginUsers: [],
      user: undefined,
      id: undefined,
      accessToken: undefined,
      refreshToken: undefined,
      accessTokenExpiresIn: undefined,
      createdAt: undefined,
    };
    if (this.cache.init) {
      try {
        const cacheData = await this.cache.init();
        this.cacheData = cacheData || defaultData;
      } catch (error) {
        console.log('cacheInit error', error);
      }
    } else {
      this.cacheData = (await this.getValue()) || defaultData;
    }
    return this.cacheData;
  }
  /**
   * 设置当前用户
   * @param user
   */
  async setLoginUser(user: CacheLoginUser) {
    const has = this.cacheData.loginUsers.find((u) => u.id === user.id);
    if (has) {
      this.cacheData.loginUsers = this.cacheData?.loginUsers?.filter((u) => u?.id && u.id !== user.id);
    }
    this.cacheData.loginUsers.push(user);
    this.cacheData.user = user.user;
    this.cacheData.id = user.id;
    this.cacheData.accessToken = user.accessToken;
    this.cacheData.refreshToken = user.refreshToken;
    this.cacheData.accessTokenExpiresIn = user.accessTokenExpiresIn;
    this.cacheData.createdAt = user.createdAt;
    await this.setValue(this.cacheData);
  }

  getCurrentUser(): Promise<CacheLoginUser> {
    const cacheData = this.cacheData;
    return Promise.resolve(cacheData.user!);
  }
  getCurrentUserList(): Promise<CacheLoginUser[]> {
    return Promise.resolve(this.cacheData.loginUsers.filter((u) => u?.id));
  }
  getRefreshToken(): Promise<string> {
    const cacheData = this.cacheData;
    return Promise.resolve(cacheData.refreshToken || '');
  }
  getAccessToken(): Promise<string> {
    const cacheData = this.cacheData;
    return Promise.resolve(cacheData.accessToken || '');
  }
  getIsExpired(): Promise<boolean> {
    const cacheData = this.cacheData;
    if (!cacheData.accessToken) {
      return Promise.resolve(true);
    }
    if (!cacheData.createdAt || !cacheData.accessTokenExpiresIn) {
      return Promise.resolve(false);
    }
    const now = Date.now();
    const expiresIn = cacheData.createdAt + cacheData.accessTokenExpiresIn * 1000;
    return Promise.resolve(now >= expiresIn);
  }

  async clearCurrentUser() {
    const user = await this.getCurrentUser();
    const has = this.cacheData.loginUsers.find((u) => u.id === user.id);
    if (has) {
      this.cacheData.loginUsers = this.cacheData?.loginUsers?.filter((u) => u?.id && u.id !== user.id);
    }
    this.cacheData.user = undefined;
    this.cacheData.id = undefined;
    this.cacheData.accessToken = undefined;
    this.cacheData.refreshToken = undefined;
    this.cacheData.accessTokenExpiresIn = undefined;
    this.cacheData.createdAt = undefined;
    await this.setValue(this.cacheData);
  }
  async clearAll() {
    this.cacheData.loginUsers = [];
    this.cacheData.user = undefined;
    this.cacheData.id = undefined;
    this.cacheData.accessToken = undefined;
    this.cacheData.refreshToken = undefined;
    this.cacheData.accessTokenExpiresIn = undefined;
    this.cacheData.createdAt = undefined;
    await this.setValue(this.cacheData);
  }
}