package cc.mrbird.febs.mall.service.impl;

import cc.mrbird.febs.common.configure.FebsConfigure;
import cc.mrbird.febs.common.entity.FebsResponse;
import cc.mrbird.febs.common.entity.QueryRequest;
import cc.mrbird.febs.common.enumerates.ActivityTypeEnum;
import cc.mrbird.febs.common.enumerates.GoodsTypeEnum;
import cc.mrbird.febs.common.enumerates.YesOrNoOrIngEnum;
import cc.mrbird.febs.common.utils.MallUtils;
import cc.mrbird.febs.mall.entity.*;
import cc.mrbird.febs.mall.mapper.*;
import cc.mrbird.febs.mall.service.IActivityService;
import cc.mrbird.febs.mall.vo.AdminActivityAddDto;
import cc.mrbird.febs.mall.vo.AdminDiscountVO;
import cc.mrbird.febs.mall.vo.AdminMallActivityListVo;
import cn.hutool.core.collection.CollUtil;
import cn.hutool.core.util.ObjectUtil;
import cn.hutool.core.util.StrUtil;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.math.RoundingMode;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.CompletableFuture;
import java.util.stream.Collectors;

@Slf4j
@Service
@RequiredArgsConstructor
@Transactional
public class ActivityServiceImpl extends ServiceImpl<MallActivityMapper, MallActivity> implements IActivityService {

    private final CouponGoodsMapper couponGoodsMapper;
    private final MallGoodsMapper mallGoodsMapper;
    private final MallGoodsSkuMapper mallGoodsSkuMapper;
    private final MallGoodsStyleMapper mallGoodsStyleMapper;
    private final FebsConfigure febsConfigure;
    @Override
    public IPage<MallActivity> getAdminListInPage(MallActivity mallActivity, QueryRequest request) {
        Page<MallActivity> page = new Page<>(request.getPageNum(), request.getPageSize());
        LambdaQueryWrapper<MallActivity> mallActivityLambdaQueryWrapper = new LambdaQueryWrapper<>();
        String name = mallActivity.getName();
        if(StrUtil.isNotEmpty(name)){
            mallActivityLambdaQueryWrapper.like(MallActivity::getName,name);
        }
        Integer state = mallActivity.getState();
        if(ObjectUtil.isNotEmpty(state)){
            mallActivityLambdaQueryWrapper.eq(MallActivity::getState,state);
        }
        mallActivityLambdaQueryWrapper.orderByDesc(MallActivity::getCreatedTime);
        Page<MallActivity> mallActivityPage = this.baseMapper.selectPage(page, mallActivityLambdaQueryWrapper);
        return mallActivityPage;
    }

    @Override
    public FebsResponse addAdminActivity(AdminActivityAddDto adminActivityAddDto) {

        MallActivity mallActivity = new MallActivity();
        mallActivity.setName(adminActivityAddDto.getName());
        String hd = MallUtils.getOrderNum("HD");
        mallActivity.setCode(hd);
        mallActivity.setStartTime(adminActivityAddDto.getStartTime());
        mallActivity.setEndTime(adminActivityAddDto.getEndTime());
        mallActivity.setMaxImage(adminActivityAddDto.getMaxImage());
        mallActivity.setMinImage(adminActivityAddDto.getMinImage());
        mallActivity.setState(YesOrNoOrIngEnum.NO.getValue());
        mallActivity.setType(adminActivityAddDto.getType());

        List<Long> activityGoodsIds = adminActivityAddDto.getActivityGoodsIds();
        String collect = activityGoodsIds.stream()
                .map(String::valueOf) // 将 Long 转换为 String
                .collect(Collectors.joining(","));// 使用逗号连接
        mallActivity.setActivityGoodsIds(collect);
        this.baseMapper.insert(mallActivity);

        if(ActivityTypeEnum.ZHE_KOU.getValue() == adminActivityAddDto.getType()){
            BigDecimal discountSize = adminActivityAddDto.getDiscountSize();
            mallActivity.setDiscountSize(discountSize);
            addDiscountGoods(mallActivity.getId(),discountSize,activityGoodsIds);
        }

        if(ActivityTypeEnum.YOU_HUI_JUAN.getValue() == adminActivityAddDto.getType()){
            mallActivity.setCouponId(adminActivityAddDto.getCouponId());
//            addCouponGoods(adminActivityAddDto.getCouponId(),activityGoodsIds);
        }
        this.baseMapper.updateById(mallActivity);

        return new FebsResponse().success().data("操作成功");
    }

    private void addDiscountGoods(Long activityId,BigDecimal discountSize, List<Long> goodsIds){
        MallActivity mallActivity = this.baseMapper.selectById(activityId);
        //将对应选中的商品按照这个折扣力度重新计算一遍
        List<MallGoods> mallGoods = mallGoodsMapper.selectList(
                new LambdaQueryWrapper<MallGoods>()
                        .eq(MallGoods::getIsNormal, GoodsTypeEnum.PU_TONG.getValue())
                        .in(MallGoods::getId, goodsIds)
        );
        if(CollUtil.isNotEmpty(mallGoods)){
            List<CompletableFuture<Void>> futures = new ArrayList<>();
            //复制对应的商品的规则
            for(MallGoods mallGoodsItem:mallGoods){
                CompletableFuture<Void> uCompletableFuture = CompletableFuture.runAsync(() -> {
                    Long goodsId = mallGoodsItem.getId();
                    //新增活动商品
                    Long goodsIdNew = addGoodsEntity(mallActivity, discountSize, mallGoodsItem);

                    List<MallGoodsStyle> mallGoodsStyles = mallGoodsStyleMapper.selectList(
                            new LambdaQueryWrapper<MallGoodsStyle>()
                                    .eq(MallGoodsStyle::getGoodsId, goodsId)
                    );

                    if(CollUtil.isNotEmpty(mallGoodsStyles)){
                        for(MallGoodsStyle mallGoodsStyleItem:mallGoodsStyles){
                            Long styleItemId = mallGoodsStyleItem.getId();

                            Long styleItemIdNew = addGoodsStyleEntity(goodsIdNew, mallGoodsStyleItem);
                            List<MallGoodsSku> mallGoodsSkus = mallGoodsSkuMapper.selectList(
                                    new LambdaQueryWrapper<MallGoodsSku>()
                                            .eq(MallGoodsSku::getStyleId, styleItemId)
                                            .eq(MallGoodsSku::getGoodsId, goodsId)
                            );
                            if(CollUtil.isNotEmpty(mallGoodsSkus)){
                                for(MallGoodsSku mallGoodsSkuItem:mallGoodsSkus){
                                    addGoodsSkuEntity(goodsIdNew,styleItemIdNew,discountSize,mallGoodsSkuItem);
                                }
                            }
                        }
                    }
                },febsConfigure.asyncThreadPoolTaskExecutor());
                futures.add(uCompletableFuture);
            }
            // 等待所有任务完成
            CompletableFuture<Void> allOf = CompletableFuture.allOf(futures.toArray(new CompletableFuture[0]));
            allOf.join();
        }
    }

    private Long addGoodsEntity(MallActivity mallActivity,BigDecimal discountSize,MallGoods mallGoodsItem){
        mallGoodsItem.setIsNormal(GoodsTypeEnum.HUO_DONG.getValue());
        mallGoodsItem.setGoodsName(mallActivity.getName()+"-"+(StrUtil.isEmpty(mallGoodsItem.getGoodsName()) ? "":mallGoodsItem.getGoodsName()));
        mallGoodsItem.setGoodsNo("HD"+mallActivity.getId()+"-"+mallGoodsItem.getGoodsNo());
        mallGoodsItem.setActivityId(mallActivity.getId());
        BigDecimal presentPrice = new BigDecimal(mallGoodsItem.getPresentPrice()).multiply(discountSize).setScale(2, RoundingMode.DOWN);
        mallGoodsItem.setPresentPrice(presentPrice.toString());
        mallGoodsMapper.insert(mallGoodsItem);
        return mallGoodsItem.getId();
    }

    private Long addGoodsStyleEntity(Long goodsId,MallGoodsStyle mallGoodsStyleItem){
        mallGoodsStyleItem.setGoodsId(goodsId);
        mallGoodsStyleMapper.insert(mallGoodsStyleItem);
        return mallGoodsStyleItem.getId();
    }

    private Long addGoodsSkuEntity(Long goodsId,Long styleId,BigDecimal discountSize,MallGoodsSku sku){
        sku.setGoodsId(goodsId);
        sku.setStyleId(styleId);
        BigDecimal presentPrice = sku.getPresentPrice().multiply(discountSize).setScale(2, RoundingMode.DOWN);
        sku.setPresentPrice(presentPrice);
        mallGoodsSkuMapper.insert(sku);
        return sku.getId();
    }

    private void addCouponGoods(Long couponId,List<Long> goodsIds){
        // 先判断是否存在关联商品，再进行查询和删除
        if (CollUtil.isNotEmpty(couponGoodsMapper.selectList(
                new LambdaQueryWrapper<CouponGoods>()
                        .select(CouponGoods::getId)
                        .eq(CouponGoods::getCouponId, couponId)))) {
            couponGoodsMapper.delete(new LambdaQueryWrapper<CouponGoods>().eq(CouponGoods::getCouponId, couponId));
        }

        // 处理 goodsIds 为 null 或空的情况
        if (CollUtil.isNotEmpty(goodsIds)) {
            for (Long goodsId : goodsIds) {
                CouponGoods couponGoods = new CouponGoods();
                couponGoods.setGoodsId(goodsId);
                couponGoods.setCouponId(couponId);
                couponGoodsMapper.insert(couponGoods);
            }
        }
    }

    @Override
    public FebsResponse discountUpdate(AdminDiscountVO adminDiscountVO) {
        return null;
    }

    @Override
    public List<AdminMallActivityListVo> getAdminActivityList() {
        List<AdminMallActivityListVo> mallActivityList = new ArrayList<>();

        List<MallActivity> mallActivities = this.baseMapper.selectList(
                new LambdaQueryWrapper<MallActivity>()
                        .select(MallActivity::getId, MallActivity::getName, MallActivity::getState, MallActivity::getType)
        );
        if(CollUtil.isNotEmpty(mallActivities)){
            for (MallActivity mallActivity : mallActivities) {
                AdminMallActivityListVo adminMallActivityListVo = new AdminMallActivityListVo();
                adminMallActivityListVo.setId(mallActivity.getId());
                String desc = YesOrNoOrIngEnum.YES.getActivityDesc(mallActivity.getState());
                String desc1 = ActivityTypeEnum.ZHE_KOU.getActivityType(mallActivity.getType());
                adminMallActivityListVo.setName(mallActivity.getName()+desc+desc1);
                mallActivityList.add(adminMallActivityListVo);
            }
        }
        return mallActivityList;
    }

    @Override
    public FebsResponse changeAdminState(Long id, Integer state) {
        MallActivity mallActivity = this.baseMapper.selectById(id);
        mallActivity.setState(state);
        this.baseMapper.updateById(mallActivity);

        if(YesOrNoOrIngEnum.NO.getValue() == state){
            List<MallGoods> mallGoods = mallGoodsMapper.selectList(
                    new LambdaQueryWrapper<MallGoods>()
                            .eq(MallGoods::getActivityId, id)
            );
            if(CollUtil.isNotEmpty(mallGoods)){
                MallGoods goods = new MallGoods();
                goods.setIsSale(MallGoods.ISSALE_STATUS_DISABLED);
                mallGoodsMapper.update(goods,
                        new LambdaQueryWrapper<MallGoods>()
                                .eq(MallGoods::getIsSale, MallGoods.ISSALE_STATUS_ENABLE)
                                .eq(MallGoods::getActivityId, id)
                );
            }
        }
        return new FebsResponse().success().message("操作成功");
    }

    @Override
    public FebsResponse delAdminActivity(Long id) {
        this.baseMapper.deleteById(id);

        return new FebsResponse().success().message("操作成功");
    }

    @Override
    public List<AdminMallActivityListVo> getAdminActivityListByType(Integer type) {
        List<AdminMallActivityListVo> mallActivityList = new ArrayList<>();
        List<MallActivity> mallActivities = this.baseMapper.selectList(
                new LambdaQueryWrapper<MallActivity>()
                        .select(MallActivity::getId, MallActivity::getName, MallActivity::getState)
                        .eq(MallActivity::getType, type)
        );
        if(CollUtil.isNotEmpty(mallActivities)){
            for (MallActivity mallActivity : mallActivities) {
                AdminMallActivityListVo adminMallActivityListVo = new AdminMallActivityListVo();
                adminMallActivityListVo.setId(mallActivity.getId());
                String desc = YesOrNoOrIngEnum.YES.getActivityDesc(mallActivity.getState());
                adminMallActivityListVo.setName(mallActivity.getName()+desc);
                mallActivityList.add(adminMallActivityListVo);
            }
        }
        return mallActivityList;
    }
}