package com.mzl.flower.service.menber.impl;

import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.mzl.flower.config.exception.ValidationException;
import com.mzl.flower.config.security.SecurityUtils;
import com.mzl.flower.constant.Constants;
import com.mzl.flower.dto.request.menber.MemberDTO;
import com.mzl.flower.dto.request.menber.MemberQueryDTO;
import com.mzl.flower.dto.response.member.MemberVO;
import com.mzl.flower.entity.menber.Member;
import com.mzl.flower.mapper.member.MemberMapper;
import com.mzl.flower.service.menber.MemberService;
import lombok.RequiredArgsConstructor;
import org.springframework.beans.BeanUtils;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.ObjectUtils;
import org.springframework.util.StringUtils;

import java.math.BigDecimal;
import java.util.List;

/**
 * @author fanghaowei
 * @version version2.0
 * @className MemberServiceImpl
 * @date 2024/8/26
 * @description 会员管理功能逻辑层
 */
@Service
@Transactional
@RequiredArgsConstructor
public class MemberServiceImpl extends ServiceImpl<MemberMapper, Member> implements MemberService {

    private final MemberMapper memberMapper;

    @Override
    public void saveMember(Member member) {
        if (StringUtils.isEmpty(member.getName())) {
            throw new ValidationException("会员等级名称不能为空");
        }

        if (member.getStartPoint() > member.getEndPoint()) {
            throw new ValidationException("成长点开始不能大于结束");
        }
        if (!StringUtils.isEmpty(member.getDiscountRatio())) {
            int discountRatio1 = member.getDiscountRatio().compareTo(BigDecimal.ZERO);
            if (discountRatio1 == -1) {
                throw new ValidationException("会员折扣百分比不能小于0");
            }
            int discountRatio2 = member.getDiscountRatio().compareTo(new BigDecimal(100));
            if (discountRatio2 == 1) {
                throw new ValidationException("会员折扣百分比不能大于100");
            }
        }
        if (!StringUtils.isEmpty(member.getDiscountAmount())) {
            int discountAmount = member.getDiscountAmount().compareTo(BigDecimal.ZERO);
            if (discountAmount == -1) {
                throw new ValidationException("会员折扣固定金额不能小于0");
            }
        }

        //保存时判断是否有重复的名称
        Member memberByName = memberMapper.getMemberByName(member.getName());
        if (!ObjectUtils.isEmpty(memberByName)) {
            throw new ValidationException("会员等级名称重复");
        }
        memberMapper.insert(member);
    }

    @Override
    public void updateMember(MemberDTO memberDTO) {
        Member memberInfo = memberMapper.selectById(memberDTO.getId());
        if (memberInfo == null) {
            throw new ValidationException("会员等级信息不存在");
        }
//        if (!memberInfo.getCreateBy().equals(SecurityUtils.getUserId())) {
//            throw new ValidationException("无权限修改");
//        }
        Member memberTemp = memberMapper.getMemberByName(memberDTO.getName());
        //判断如果按照会员等级查询到得名称和当前得Id不一致，不能修改。
        if (!ObjectUtils.isEmpty(memberTemp)) {
            if (memberTemp.getName().equals(memberDTO.getName())) {
                throw new ValidationException("已存在会员等级名称，无法修改");
            }
        }
        BeanUtils.copyProperties(memberDTO,memberInfo);
        memberInfo.update(SecurityUtils.getUserId());
        memberMapper.updateById(memberInfo);
    }

    @Override
    public void deleteMember(String id) {
        if(id.equals(Constants.DEFAULT_MEMBER_ID)){
            throw new ValidationException("默认普通会员只能编辑，不能删除");
        }
        Member member = memberMapper.selectById(id);
        if (member == null) {
            throw new ValidationException("会员等级信息不存在");
        }

        // TODO: 2024/8/26 如果当前会员绑定了优惠券，不能删除，等优惠券逻辑完成。 
        memberMapper.deleteById(id);
    }

    @Override
    public Page<MemberVO> queryPage(MemberQueryDTO memberQueryDTO, Page page) {
        List<MemberVO> list = memberMapper.queryPage(memberQueryDTO, page);
        page.setRecords(list);
        return page;
    }
}