package com.doumee.service.business.impl;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.conditions.update.UpdateWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.doumee.core.constants.Constants;
import com.doumee.core.constants.ResponseStatus;
import com.doumee.core.exception.BusinessException;
import com.doumee.core.model.LoginUserInfo;
import com.doumee.core.model.PageData;
import com.doumee.core.model.PageWrap;
import com.doumee.core.utils.Utils;
import com.doumee.dao.business.CouponMapper;
import com.doumee.dao.business.model.Coupon;
import com.doumee.service.business.CouponService;
import com.github.yulichang.wrapper.MPJLambdaWrapper;
import org.apache.commons.lang3.StringUtils;
import org.apache.shiro.SecurityUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.CollectionUtils;

import java.util.Date;
import java.util.List;
import java.util.Objects;

@Service
public class CouponServiceImpl implements CouponService {

    @Autowired
    private CouponMapper couponMapper;

    @Override
    @Transactional(rollbackFor = {Exception.class, BusinessException.class})
    public Integer create(Coupon coupon) {
        validateCoupon(coupon);
        LoginUserInfo loginUserInfo = (LoginUserInfo) SecurityUtils.getSubject().getPrincipal();
        coupon.setIsdeleted(Constants.ZERO);
        coupon.setCreateDate(new Date());
        coupon.setCreator(loginUserInfo.getId());
        coupon.setEditDate(new Date());
        coupon.setEditor(loginUserInfo.getId());
        // 默认项
        coupon.setType(Constants.ZERO);
        coupon.setCouponType(Objects.isNull(coupon.getCouponType()) ? Constants.ZERO : coupon.getCouponType());
        coupon.setGetMethod(Objects.isNull(coupon.getGetMethod()) ? Constants.ZERO : coupon.getGetMethod());
        couponMapper.insert(coupon);
        return coupon.getId();
    }

    @Override
    public void deleteById(Integer id) {
        couponMapper.update(new UpdateWrapper<Coupon>().lambda()
                .set(Coupon::getIsdeleted, Constants.ONE)
                .eq(Coupon::getId, id));
    }

    @Override
    public void deleteByIdInBatch(List<Integer> ids) {
        if (CollectionUtils.isEmpty(ids)) {
            return;
        }
        for (Integer id : ids) {
            this.deleteById(id);
        }
    }

    @Override
    @Transactional(rollbackFor = {Exception.class, BusinessException.class})
    public void updateById(Coupon coupon) {
        if (Objects.isNull(coupon) || Objects.isNull(coupon.getId())) {
            throw new BusinessException(ResponseStatus.BAD_REQUEST);
        }
        validateCoupon(coupon);
        LoginUserInfo loginUserInfo = (LoginUserInfo) SecurityUtils.getSubject().getPrincipal();
        coupon.setEditDate(new Date());
        coupon.setEditor(loginUserInfo.getId());
        couponMapper.updateById(coupon);
    }

    @Override
    public void updateStatus(Coupon coupon) {
        if (Objects.isNull(coupon) || Objects.isNull(coupon.getId()) || Objects.isNull(coupon.getStatus())) {
            throw new BusinessException(ResponseStatus.BAD_REQUEST);
        }
        LoginUserInfo loginUserInfo = (LoginUserInfo) SecurityUtils.getSubject().getPrincipal();
        Coupon update = new Coupon();
        update.setId(coupon.getId());
        update.setStatus(coupon.getStatus());
        update.setEditDate(new Date());
        update.setEditor(loginUserInfo.getId());
        couponMapper.updateById(update);
    }

    @Override
    public Coupon findById(Integer id) {
        MPJLambdaWrapper<Coupon> wrapper = new MPJLambdaWrapper<>();
        wrapper.selectAll(Coupon.class)
                .select("(SELECT COUNT(*) FROM member_coupon mc WHERE mc.COUPON_ID = t.ID AND mc.ISDELETED = 0 AND mc.STATUS IN (1,2,99)) AS CLAIM_COUNT")
                .select("(SELECT COUNT(*) FROM member_coupon mc WHERE mc.COUPON_ID = t.ID AND mc.ISDELETED = 0 AND mc.STATUS = 2) AS USED_COUNT")
                .eq(Coupon::getId, id)
                .eq(Coupon::getIsdeleted, Constants.ZERO);
        Coupon coupon = couponMapper.selectJoinOne(Coupon.class, wrapper);
        if (Objects.isNull(coupon)) {
            throw new BusinessException(ResponseStatus.DATA_EMPTY);
        }
        return coupon;
    }

    @Override
    public List<Coupon> findList(Coupon coupon) {
        QueryWrapper<Coupon> wrapper = new QueryWrapper<>(coupon);
        return couponMapper.selectList(wrapper);
    }

    @Override
    public PageData<Coupon> findPage(PageWrap<Coupon> pageWrap) {
        IPage<Coupon> page = new Page<>(pageWrap.getPage(), pageWrap.getCapacity());
        MPJLambdaWrapper<Coupon> wrapper = new MPJLambdaWrapper<>();
        Utils.MP.blankToNull(pageWrap.getModel());
        pageWrap.getModel().setIsdeleted(Constants.ZERO);
        wrapper.selectAll(Coupon.class)
                .select("u.USERNAME AS EDITOR_NAME")
                .select("(SELECT COUNT(*) FROM member_coupon mc WHERE mc.COUPON_ID = t.ID AND mc.ISDELETED = 0 AND mc.STATUS IN (1,2,99)) AS CLAIM_COUNT")
                .select("(SELECT COUNT(*) FROM member_coupon mc WHERE mc.COUPON_ID = t.ID AND mc.ISDELETED = 0 AND mc.STATUS = 2) AS USED_COUNT")
                .innerJoin("system_user u ON u.ID = t.EDITOR")
                .eq(Coupon::getIsdeleted, Constants.ZERO);
        if (pageWrap.getModel().getStatus() != null) {
            wrapper.eq(Coupon::getStatus, pageWrap.getModel().getStatus());
        }
        if (pageWrap.getModel().getName() != null) {
            wrapper.like(Coupon::getName, pageWrap.getModel().getName());
        }
        wrapper.orderByDesc(Coupon::getId);
        return PageData.from(couponMapper.selectJoinPage(page, Coupon.class, wrapper));
    }

    @Override
    public long count(Coupon coupon) {
        QueryWrapper<Coupon> wrapper = new QueryWrapper<>(coupon);
        return couponMapper.selectCount(wrapper);
    }

    private void validateCoupon(Coupon coupon) {
        if (Objects.isNull(coupon) || StringUtils.isBlank(coupon.getName())) {
            throw new BusinessException(ResponseStatus.BAD_REQUEST.getCode(), "优惠券名称不能为空");
        }
        if (Objects.isNull(coupon.getLimitPrice()) || coupon.getLimitPrice() <= 0) {
            throw new BusinessException(ResponseStatus.BAD_REQUEST.getCode(), "满额必须大于0");
        }
        if (Objects.isNull(coupon.getPrice()) || coupon.getPrice() <= 0) {
            throw new BusinessException(ResponseStatus.BAD_REQUEST.getCode(), "优惠金额必须大于0");
        }
        if (coupon.getPrice() >= coupon.getLimitPrice()) {
            throw new BusinessException(ResponseStatus.BAD_REQUEST.getCode(), "优惠金额必须小于满额");
        }
        if (Objects.isNull(coupon.getPushDays()) || coupon.getPushDays() < 1) {
            throw new BusinessException(ResponseStatus.BAD_REQUEST.getCode(), "推送后领取有效天数必须大于等于1天");
        }
        if (Objects.isNull(coupon.getValidDays()) || coupon.getValidDays() < 1) {
            throw new BusinessException(ResponseStatus.BAD_REQUEST.getCode(), "领取后有效天数必须大于等于1天");
        }
        if (Objects.isNull(coupon.getStatus())) {
            throw new BusinessException(ResponseStatus.BAD_REQUEST.getCode(), "状态不能为空");
        }
    }
}