package com.badminton.service;

import com.badminton.entity.User;
import java.util.HashMap;
import java.util.Map;

/**
 * 用户服务类
 * 实现用户登录功能
 * 对应需求：FR-01 用户注册与登录
 */
public class UserService {
    private Map<String, User> userDatabase = new HashMap<>();

    public UserService() {
        // 初始化测试用户
        userDatabase.put("admin", new User("U001", "admin", "123456", "系统管理员", "13800138000", "admin"));
        userDatabase.put("referee1", new User("U002", "referee1", "123456", "张裁判", "13800138001", "referee"));
        userDatabase.put("player1", new User("U003", "player1", "123456", "李选手", "13800138002", "player"));
    }

    public User login(String username, String password) {
        if (!userDatabase.containsKey(username)) {
            System.out.println("登录失败：用户名不存在");
            return null;
        }

        User user = userDatabase.get(username);

        if (!user.getPassword().equals(password)) {
            System.out.println("登录失败：密码错误");
            return null;
        }

        System.out.println("登录成功！欢迎您，" + user.getRealName() + "(" + user.getRole() + ")");
        return user;
    }

    public static void main(String[] args) {
        UserService userService = new UserService();
        
        // 测试用例
        userService.login("admin", "123456");
        userService.login("player1", "123456");
        userService.login("admin", "wrongpassword");
    }
}