package com.gym.controller;

import com.gym.model.User;
import com.gym.service.UserService;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpSession;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Optional;

@RestController
@RequestMapping("/api/users")
public class UserController {

    @Autowired
    private UserService userService;

    // 用户注册
    @PostMapping("/register")
    public Map<String, Object> register(@RequestBody User user) {
        Map<String, Object> response = new HashMap<>();
        try {
            User registeredUser = userService.register(user);
            response.put("code", 200);
            response.put("message", "注册成功");
            response.put("data", registeredUser);
        } catch (Exception e) {
            response.put("code", 400);
            response.put("message", e.getMessage());
        }
        return response;
    }

    // 用户登录

    @PostMapping("/login")
    public Map<String, Object> login(@RequestBody Map<String, String> loginData) {
        Map<String, Object> response = new HashMap<>();
        try {
            String username = loginData.get("username");
            String password = loginData.get("password");

            // 验证参数
            if (username == null || password == null) {
                response.put("code", 400);
                response.put("message", "用户名和密码不能为空");
                return response;
            }

            // 调用服务层登录
            Optional<User> userOpt = userService.login(username, password);

            if (userOpt.isPresent()) {
                User user = userOpt.get();

                // 创建返回数据（不包含敏感信息）
                Map<String, Object> userData = new HashMap<>();
                userData.put("id", user.getId());
                userData.put("username", user.getUsername());
                userData.put("email", user.getEmail());
                userData.put("role", user.getRole());
                userData.put("realName", user.getRealName());
                userData.put("points", user.getPoints());
                userData.put("lastLogin", user.getLastLogin());

                response.put("code", 200);
                response.put("message", "登录成功");
                response.put("data", userData);
            } else {
                response.put("code", 401);
                response.put("message", "用户名或密码错误");
            }

        } catch (Exception e) {
            response.put("code", 500);
            response.put("message", "登录失败: " + e.getMessage());
        }
        return response;
    }

    // 获取所有用户
    @GetMapping
    public Map<String, Object> getAllUsers() {
        Map<String, Object> response = new HashMap<>();
        List<User> users = userService.getAllUsers();
        response.put("code", 200);
        response.put("message", "获取成功");
        response.put("data", users);
        response.put("count", users.size());
        return response;
    }

    // 根据角色获取用户
    @GetMapping("/role/{role}")
    public Map<String, Object> getUsersByRole(@PathVariable String role) {
        Map<String, Object> response = new HashMap<>();
        List<User> users = userService.getUsersByRole(role);
        response.put("code", 200);
        response.put("message", "获取成功");
        response.put("data", users);
        return response;
    }

    // 获取单个用户
    @GetMapping("/{id}")
    public Map<String, Object> getUserById(@PathVariable Long id) {
        Map<String, Object> response = new HashMap<>();
        return userService.getUserById(id)
                .map(user -> {
                    response.put("code", 200);
                    response.put("message", "获取成功");
                    response.put("data", user);
                    return response;
                })
                .orElseGet(() -> {
                    response.put("code", 404);
                    response.put("message", "用户不存在");
                    return response;
                });
    }

    // 更新用户信息
    @PutMapping("/{id}")
    public Map<String, Object> updateUser(@PathVariable Long id, @RequestBody User user) {
        Map<String, Object> response = new HashMap<>();
        try {
            User updatedUser = userService.updateUser(id, user);
            response.put("code", 200);
            response.put("message", "更新成功");
            response.put("data", updatedUser);
        } catch (Exception e) {
            response.put("code", 400);
            response.put("message", e.getMessage());
        }
        return response;
    }

    // 检查用户名是否可用
    @GetMapping("/check-username")
    public Map<String, Object> checkUsername(@RequestParam String username) {
        Map<String, Object> response = new HashMap<>();
        boolean available = userService.isUsernameAvailable(username);
        response.put("code", 200);
        response.put("message", available ? "用户名可用" : "用户名已存在");
        response.put("available", available);
        return response;
    }

    // 添加积分
    @PostMapping("/{id}/add-points")
    public Map<String, Object> addPoints(@PathVariable Long id, @RequestBody Map<String, Integer> data) {
        Map<String, Object> response = new HashMap<>();
        try {
            Integer points = data.get("points");
            User user = userService.addPoints(id, points);
            response.put("code", 200);
            response.put("message", "积分添加成功");
            response.put("data", user);
        } catch (Exception e) {
            response.put("code", 400);
            response.put("message", e.getMessage());
        }
        return response;
    }

    // 用户登出
    @PostMapping("/logout")
    public Map<String, Object> logout(HttpServletRequest request) {
        Map<String, Object> response = new HashMap<>();
        try {
            // 清除会话（如果使用session）
            HttpSession session = request.getSession(false);
            if (session != null) {
                session.invalidate();
            }

            response.put("code", 200);
            response.put("message", "登出成功");
        } catch (Exception e) {
            response.put("code", 500);
            response.put("message", "登出失败");
        }
        return response;
    }
}