package com.tcm.training.admin.live.service;

import cn.hutool.core.util.StrUtil;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.tcm.training.admin.live.dto.ProjectIntroductionPasswordRequest;
import com.tcm.training.admin.live.entity.ProjectIntroductionPassword;
import com.tcm.training.admin.live.mapper.ProjectIntroductionPasswordMapper;
import com.tcm.training.admin.live.vo.ProjectIntroductionPasswordVO;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

@Service
public class ProjectIntroductionPasswordService {

    private final ProjectIntroductionPasswordMapper passwordMapper;
    private final BCryptPasswordEncoder passwordEncoder;

    public ProjectIntroductionPasswordService(ProjectIntroductionPasswordMapper passwordMapper,
                                               BCryptPasswordEncoder passwordEncoder) {
        this.passwordMapper = passwordMapper;
        this.passwordEncoder = passwordEncoder;
    }

    /**
     * 获取项目介绍密码配置
     */
    public ProjectIntroductionPasswordVO getPasswordConfig() {
        ProjectIntroductionPassword config = passwordMapper.selectOne(
                new LambdaQueryWrapper<ProjectIntroductionPassword>()
                        .orderByAsc(ProjectIntroductionPassword::getId)
                        .last("limit 1")
        );

        ProjectIntroductionPasswordVO vo = new ProjectIntroductionPasswordVO();
        if (config != null) {
            vo.setId(config.getId());
            vo.setPasswordEnabled(config.getPasswordEnabled());
            // 密码不返回明文，前端只需要知道是否设置了密码
            vo.setPassword(StrUtil.isNotBlank(config.getPassword()) ? "******" : null);
        } else {
            vo.setPasswordEnabled(0);
            vo.setPassword(null);
        }
        return vo;
    }

    /**
     * 保存项目介绍密码配置
     */
    @Transactional
    public void savePasswordConfig(ProjectIntroductionPasswordRequest req) {
        // 验证密码格式
        if (req.getPasswordEnabled() == 1) {
            if (StrUtil.isBlank(req.getPassword())) {
                throw new IllegalArgumentException("启用密码访问时，密码不能为空");
            }
            if (req.getPassword().length() != 6) {
                throw new IllegalArgumentException("密码必须是6个字符");
            }
        }

        // 查询是否已存在配置
        ProjectIntroductionPassword config = passwordMapper.selectOne(
                new LambdaQueryWrapper<ProjectIntroductionPassword>()
                        .orderByAsc(ProjectIntroductionPassword::getId)
                        .last("limit 1")
        );

        if (config == null) {
            // 新增
            config = new ProjectIntroductionPassword();
            config.setPasswordEnabled(req.getPasswordEnabled());
            if (req.getPasswordEnabled() == 1 && StrUtil.isNotBlank(req.getPassword())) {
                config.setPassword(passwordEncoder.encode(req.getPassword()));
            } else {
                config.setPassword(null);
            }
            passwordMapper.insert(config);
        } else {
            // 更新
            config.setPasswordEnabled(req.getPasswordEnabled());
            if (req.getPasswordEnabled() == 1 && StrUtil.isNotBlank(req.getPassword())) {
                config.setPassword(passwordEncoder.encode(req.getPassword()));
            } else {
                // 不启用密码时，清空密码
                config.setPassword(null);
            }
            passwordMapper.updateById(config);
        }
    }

    /**
     * 验证项目介绍密码
     */
    public boolean verifyPassword(String inputPassword) {
        if (StrUtil.isBlank(inputPassword)) {
            return false;
        }

        ProjectIntroductionPassword config = passwordMapper.selectOne(
                new LambdaQueryWrapper<ProjectIntroductionPassword>()
                        .eq(ProjectIntroductionPassword::getPasswordEnabled, 1)
                        .isNotNull(ProjectIntroductionPassword::getPassword)
                        .orderByAsc(ProjectIntroductionPassword::getId)
                        .last("limit 1")
        );

        return config != null
                && config.getPassword() != null
                && !config.getPassword().isEmpty()
                && passwordEncoder.matches(inputPassword, config.getPassword());
    }
}