export type UserRole = "stu" | "teacher";

export interface User {
  id: string;
  username: string;
  role: UserRole;
  name: string;
  avatar: string;
}

export interface AuthResponse {
  token: string;
  user: User;
}

const AUTH_USERS: Record<string, User> = {
  stu: {
    id: "231250001",
    username: "stu",
    role: "stu",
    name: "李子涵",
    avatar: "/images/profile-avatar.png",
  },
  teacher: {
    id: "tea_001",
    username: "teacher",
    role: "teacher",
    name: "刘钦",
    avatar: "/images/profile-avatar.png",
  },
};

const delay = (ms: number) => new Promise((resolve) => setTimeout(resolve, ms));

export const authApi = {
  login: async (username: string, password: string): Promise<AuthResponse> => {
    await delay(300);

    if (password !== "passwd") {
      throw new Error("密码错误");
    }

    const user = AUTH_USERS[username];
    if (!user) {
      throw new Error("用户不存在");
    }

    return {
      token: `local_auth_${user.username}_${user.id}_${Date.now()}`,
      user,
    };
  },

  verifySession: async (token: string | null): Promise<User | null> => {
    await delay(120);

    if (!token) {
      return null;
    }

    return Object.values(AUTH_USERS).find((user) => token.includes(user.id)) ?? null;
  },
};