package com.emotion.controller;

import com.baomidou.mybatisplus.core.metadata.IPage;
import com.emotion.common.BasePageRequest;
import com.emotion.common.PageResult;
import com.emotion.common.Result;
import com.emotion.dto.request.UserCreateRequest;
import com.emotion.dto.request.UserUpdateRequest;
import com.emotion.dto.response.UserResponse;
import com.emotion.entity.User;
import com.emotion.service.UserService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.*;

import javax.validation.Valid;
import java.time.format.DateTimeFormatter;
import java.util.List;
import java.util.stream.Collectors;

/**
 * 用户控制器
 *
 * @author emotion-museum
 * @date 2025-07-22
 */
@RestController
@RequestMapping("/user")
public class UserController {

    @Autowired
    private UserService userService;

    private static final DateTimeFormatter DATE_TIME_FORMATTER = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");

    /**
     * 分页查询用户
     */
    @GetMapping("/page")
    public Result<PageResult<UserResponse>> getPage(@Validated BasePageRequest request) {
        IPage<User> page = userService.getPage(request);
        List<UserResponse> userResponses = page.getRecords().stream()
                .map(this::convertToResponse)
                .collect(Collectors.toList());

        PageResult<UserResponse> pageResult = new PageResult<>();
        pageResult.setCurrent(page.getCurrent());
        pageResult.setSize(page.getSize());
        pageResult.setTotal(page.getTotal());
        pageResult.setPages(page.getPages());
        pageResult.setRecords(userResponses);

        return Result.success(pageResult);
    }

    /**
     * 根据ID获取用户信息
     */
    @GetMapping("/{id}")
    public Result<UserResponse> getById(@PathVariable String id) {
        User user = userService.getById(id);
        if (user == null) {
            return Result.notFound("用户不存在");
        }
        return Result.success(convertToResponse(user));
    }

    /**
     * 创建用户
     */
    @PostMapping
    public Result<UserResponse> create(@Valid @RequestBody UserCreateRequest request) {
        User user = userService.createUser(
                request.getAccount(),
                request.getUsername(),
                request.getPassword(),
                request.getEmail(),
                request.getPhone()
        );
        return Result.success(convertToResponse(user));
    }

    /**
     * 更新用户
     */
    @PutMapping("/{id}")
    public Result<UserResponse> update(@PathVariable String id, @Valid @RequestBody UserUpdateRequest request) {
        User user = new User();
        BeanUtils.copyProperties(request, user);
        user.setId(id);

        boolean updated = userService.updateById(user);
        if (!updated) {
            return Result.error("更新失败");
        }

        User updatedUser = userService.getById(id);
        return Result.success(convertToResponse(updatedUser));
    }

    /**
     * 删除用户
     */
    @DeleteMapping("/{id}")
    public Result<Void> delete(@PathVariable String id) {
        boolean deleted = userService.removeById(id);
        if (!deleted) {
            return Result.error("删除失败");
        }
        return Result.success();
    }

    /**
     * 根据账号查询用户
     */
    @GetMapping("/account/{account}")
    public Result<UserResponse> getByAccount(@PathVariable String account) {
        User user = userService.getByAccount(account);
        if (user == null) {
            return Result.notFound("用户不存在");
        }
        return Result.success(convertToResponse(user));
    }

    /**
     * 统计用户数量
     */
    @GetMapping("/count/status/{status}")
    public Result<Long> countByStatus(@PathVariable Integer status) {
        Long count = userService.countByStatus(status);
        return Result.success(count);
    }

    /**
     * 转换为响应对象
     */
    private UserResponse convertToResponse(User user) {
        UserResponse response = new UserResponse();
        BeanUtils.copyProperties(user, response);
        response.setId(user.getId());
        if (user.getCreateTime() != null) {
            response.setCreateTime(user.getCreateTime().format(DATE_TIME_FORMATTER));
        }
        if (user.getUpdateTime() != null) {
            response.setUpdateTime(user.getUpdateTime().format(DATE_TIME_FORMATTER));
        }
        if (user.getLastActiveTime() != null) {
            response.setLastActiveTime(user.getLastActiveTime().format(DATE_TIME_FORMATTER));
        }
        return response;
    }
}