package cn.bunny.service.impl;


import cn.bunny.exception.BunnyException;
import cn.bunny.mapper.SysUserMapper;
import cn.bunny.service.SysUserService;
import cn.bunny.spzx.model.dto.system.LoginDto;
import cn.bunny.spzx.model.entity.system.SysUser;
import cn.bunny.spzx.model.vo.common.ResultCodeEnum;
import cn.bunny.spzx.model.vo.system.LoginVo;
import cn.hutool.core.util.StrUtil;
import com.alibaba.fastjson.JSON;
import lombok.extern.log4j.Log4j2;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.util.UUID;
import java.util.concurrent.TimeUnit;

@Log4j2
@Service
public class SysUserServiceImpl implements SysUserService {
    @Autowired
    private SysUserMapper sysUserMapper;

    @Autowired
    private RedisTemplate<String, String> redisTemplate;

    // 用户登录
    @Override
    public LoginVo login(LoginDto loginDto) {
        // 判断验证码是否正确
        String captcha = loginDto.getCaptcha();
        String codeKey = loginDto.getCodeKey();
        String redisCode = redisTemplate.opsForValue().get("user:validate" + codeKey);

        // 比较验证码
        if (StrUtil.isEmpty(redisCode) || !StrUtil.equalsIgnoreCase(redisCode, captcha)) {
            redisTemplate.delete("user:validate" + codeKey);
            throw new BunnyException(ResultCodeEnum.VALIDATECODE_ERROR);
        }
        // 如果一致，删除Redis中验证码
        redisTemplate.delete("user:validate" + codeKey);

        // 获取用户提交用户名，LoginDto获取到
        String userName = loginDto.getUserName();

        // 根据用户名查询数据表 sys_user
        SysUser sysUser = sysUserMapper.selectUserInfoByUserName(userName);

        // 如果用户名查询不到对应信息，用户不存在，返回错误信息
        if (sysUser == null) {
            throw new BunnyException(ResultCodeEnum.LOGIN_ERROR_USERNAME);// 用户名不存在
        }

        // 获取输入密码，比较输入密码和数据库密码是否一致
        String databases_password = sysUser.getPassword();
        String input_password = DigestUtils.md5DigestAsHex(loginDto.getPassword().getBytes());
        if (!input_password.equals(databases_password)) {
            throw new BunnyException(ResultCodeEnum.LOGIN_ERROR_PASSWORD);// 密码不正确
        }


        String token = UUID.randomUUID().toString().replaceAll("-", "");
        redisTemplate.opsForValue().set("user:login" + token, JSON.toJSONString(sysUser), 7, TimeUnit.DAYS);
        LoginVo loginVo = new LoginVo();
        loginVo.setToken(token);

        return loginVo;
    }

    // 获取用户token
    @Override
    public SysUser getUserInfo(String token) {
        String userJson = redisTemplate.opsForValue().get("user:login" + token);
        SysUser sysUser = JSON.parseObject(userJson, SysUser.class);
        return sysUser;
    }

    // 用户退出
    @Override
    public void logout(String token) {
        redisTemplate.delete("user:login" + token);
    }
}