package com.linghu.controller;

import com.alibaba.excel.EasyExcel;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.linghu.model.common.ResponseResult;
import com.linghu.model.entity.Sectionalization;
import com.linghu.model.entity.User;
import com.linghu.model.excel.UserExcel;
import com.linghu.model.vo.UserPageVO;
import com.linghu.service.SectionalizationService;
import com.linghu.service.UserService;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpHeaders;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.util.StringUtils;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@RestController
@RequestMapping("/user")
@Api(value = "账号相关接口", tags = "设置-账号管理")
public class UserController {
    @Autowired
    private UserService userService;

    /**
     * 新增用户
     */

    @PostMapping
    @ApiOperation(value = "添加")
    public ResponseResult add(@RequestBody User user) {
        List<User> list = userService.list(new LambdaQueryWrapper<User>().eq(User::getUser_email, user.getUser_email()));
        if (list != null && list.size() > 0) {
            return ResponseResult.error("该邮箱已存在");
        }
        user.setStatus("正常");
        userService.save(user);
        return ResponseResult.success();

    }


    /**
     * 修改用户
     */
    @PutMapping
    @ApiOperation(value = "修改")
    public ResponseResult edit(@RequestBody User user) {
        User user1 = userService.getById(user.getUser_id());
        if (user1 == null) {
            return ResponseResult.error("该账户不存在");
        }
        List<User> list = userService.list(new LambdaQueryWrapper<User>()
                        .ne(User::getUser_id, user.getUser_id())
                .eq(User::getUser_email, user.getUser_email()));
        if (list != null && list.size() > 0) {
            return ResponseResult.error("该邮箱已存在");
        }
        userService.updateById(user);
        return ResponseResult.success();

    }

    /**
     * 删除用户
     */

    @DeleteMapping("/{user_id}")
    @ApiOperation(value = "删除")
    public ResponseResult delete(@PathVariable("user_id") Integer user_id) {
        userService.removeById(user_id);
        return ResponseResult.success();

    }
    /**
     * 分页查询
     */
    @GetMapping
    @ApiOperation(value = "分页")
    public ResponseResult<Page<UserPageVO>> page(@RequestParam(value = "pageSize", required = false, defaultValue = "10")Integer pageSize,
                                                 @RequestParam(value = "pageNum", required = false,defaultValue = "1")Integer pageNum,
                                                 @RequestParam(value = "sectionalization_id",required = false)Integer sectionalization_id,
                                                 @RequestParam(value = "status" ,required = false)String status) {
        Page<UserPageVO> page = new Page<>(pageNum, pageSize);
        return ResponseResult.success( userService.getPage(page,sectionalization_id,status));
    }

    /**
     * 下载模板
     */

    @GetMapping("/downloadTemplate")
    @ApiOperation("下载模板")
    public ResponseEntity<byte[]> downloadTemplate() throws IOException {
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        EasyExcel.write(out, UserExcel.class).sheet("账号模板").doWrite(new ArrayList<>());

        return ResponseEntity.ok()
                .header(HttpHeaders.CONTENT_DISPOSITION, "attachment;filename=keyword_template.xlsx")
                .contentType(MediaType.APPLICATION_OCTET_STREAM)
                .body(out.toByteArray());
    }


    /**
     * 导入文件
     */
    // 导入文件
    @Autowired
    private SectionalizationService sectionalizationService;
    @PostMapping("/importUserExcel")
    @ApiOperation("导入用户数据")
    public ResponseResult importUserExcel(@RequestParam("file") MultipartFile file) {
        //查找出用户列表
        List<User> userList = userService.list();
        //名称
        Map<String, User> nameMap = userList.stream()
                .collect(Collectors.toMap(
                        User::getUser_name,  // Key映射
                        excel -> excel,  // Value映射
                        (oldValue, newValue) -> oldValue  // 键冲突处理（保留旧值）
                ));

        //查找出分组列表
        List<Sectionalization>  list = sectionalizationService.list();
        //分组
        Map<String, Sectionalization> sectionalizationMap = list.stream()
                .collect(Collectors.toMap(
                        Sectionalization::getSectionalization_name,  // Key映射
                        excel -> excel,  // Value映射
                        (oldValue, newValue) -> oldValue  // 键冲突处理（保留旧值）
                ));

        try {
            // 检查文件是否为空
            if (file.isEmpty()) {
                return ResponseResult.error("上传文件不能为空");
            }

            // 读取Excel数据
            List<UserExcel> excelList = EasyExcel.read(file.getInputStream())
                    .head(UserExcel.class)
                    .sheet()
                    .doReadSync();

            // 数据转换与验证
            List<String> errorMessages = new ArrayList<>();
            for (UserExcel excel : excelList) {
                // 检查必要字段
                if (!StringUtils.hasText(excel.getUser_name())) {
                    errorMessages.add("账户名不能为空");
                    continue;
                }
                if (!StringUtils.hasText(excel.getUser_email())) {
                    errorMessages.add("邮箱不能为空");
                    continue;
                }
                if (!StringUtils.hasText(String.valueOf(excel.getPassword()))) {
                    errorMessages.add("密码不能为空");
                    continue;
                }

                if (!StringUtils.hasText(excel.getSectionalization_name())) {
                    errorMessages.add("分组不能为空");
                    continue;
                }
                if (nameMap.containsKey(excel.getUser_name())){
                    errorMessages.add("用户名称重复");
                    continue;
                }
            }
            // 处理错误
            if (!errorMessages.isEmpty()) {
                return ResponseResult.error("数据验证失败: " + String.join("; ", errorMessages));
            }
            // 开始添加
            for (UserExcel excel : excelList) {
                User user = new User();
                if (sectionalizationMap.containsKey(excel.getSectionalization_name())) {
                    user.setSectionalization_id(sectionalizationMap.get(excel.getSectionalization_name()).getSectionalization_id());
                }else {
                    //新增
                    Sectionalization sectionalization = new Sectionalization();
                    sectionalization.setSectionalization_name(excel.getSectionalization_name());
                    sectionalizationService.save(sectionalization);
                    user.setSectionalization_id(sectionalization.getSectionalization_id());
                }
                user.setUser_email(excel.getUser_email());
                user.setUser_name(excel.getUser_name());
                user.setPassword(excel.getPassword());
                user.setStatus("正常");
                userService.save(user);

            }
            // 返回信息
            return ResponseResult.success();
        }
        catch (Exception e) {
            // 记录详细异常信息

            return ResponseResult.error("文件解析失败：" + e.getMessage());
        }
    }



}