package com.dsh.activity.service.impl;

import cn.hutool.core.collection.CollUtil;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.dsh.activity.entity.THuiminCard;
import com.dsh.activity.entity.TPayHuimin;
import com.dsh.activity.entity.TStudent;
import com.dsh.activity.enums.HuiminCardPaymentStatusEnum;
import com.dsh.activity.enums.HuiminCardPaymentTypeEnum;
import com.dsh.activity.enums.HuiminCardRefundStatusEnum;
import com.dsh.activity.enums.HuiminCardTypeEnum;
import com.dsh.activity.feignclient.account.StudentClient;
import com.dsh.activity.mapper.HuiminCardMapper;
import com.dsh.activity.model.response.MyHuiminCardVO;
import com.dsh.activity.service.HuiminCardService;
import com.dsh.activity.service.PayHuiminService;
import com.dsh.activity.util.UUIDUtil;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import javax.annotation.Resource;
import java.time.LocalDateTime;
import java.time.ZoneId;
import java.util.Calendar;
import java.util.Date;
import java.util.List;

/**
 * @author zhibing.pu
 * @date 2023/7/11 17:31
 */
@Service
public class HuiminCardServiceImpl extends ServiceImpl<HuiminCardMapper, THuiminCard> implements HuiminCardService {

    private static final int ANNUAL_CARD_VALID_DAYS = 365;
    private static final int YEAR_END_MONTH = Calendar.DECEMBER;
    private static final int YEAR_END_DAY = 31;
    private static final int DAY_END_HOUR = 23;
    private static final int DAY_END_MINUTE = 59;
    private static final int DAY_END_SECOND = 59;

    @Resource
    private PayHuiminService payHuiminService;
    @Resource
    private StudentClient studentClient;

    @Override
    public List<THuiminCard> getHuiminAgreementAndList(Integer pageNo, Integer pageSize, Integer storeId) {
        return this.baseMapper.getHuiminAgreementAndList(pageNo,pageSize,storeId);
    }
    @Override
    public List<THuiminCard> getHuiminAgreementAndListNolimit(Integer storeId) {
        return this.baseMapper.getHuiminAgreementAndListNolimit(storeId);
    }

    @Override
    public List<MyHuiminCardVO> getMyHuiminCardList(Integer pageNo, Integer pageSize,Integer appUserId) {
        return this.baseMapper.getMyHuiminCardList(pageNo,pageSize,appUserId);
    }

    /**
     * 为指定绑定人员录入赠送的玩湃惠民卡订单。
     * 业务流程：参数校验 → 校验卡及人员 → 计算有效期 → 保存赠送订单。
     *
     * @param studentId 绑定人员ID，不可为空
     * @param cardId    玩湃惠民卡ID，不可为空
     * @throws IllegalArgumentException 惠民卡或绑定人员不存在时抛出
     */
    @Override
    @Transactional(rollbackFor = Exception.class)
    public void recordGiftHuiminCard(Integer studentId, Integer cardId) {
        // STEP 1: 校验录入所需的基础参数。
        if (studentId == null || cardId == null) {
            throw new IllegalArgumentException("绑定人员和惠民卡不能为空");
        }

        // STEP 2: 查询并校验惠民卡和绑定人员，确保订单关联数据有效。
        THuiminCard huiminCard = this.getById(cardId);
        if (huiminCard == null) {
            throw new IllegalArgumentException("玩湃惠民卡不存在");
        }
        List<TStudent> students = studentClient.getStudentByIds(String.valueOf(studentId));
        if (CollUtil.isEmpty(students) || students.get(0).getAppUserId() == null) {
            throw new IllegalArgumentException("绑定人员不存在或未关联用户");
        }

        // STEP 3: 按卡类型计算赠送卡的有效期。
        Date currentTime = new Date();
        TPayHuimin giftOrder = new TPayHuimin();
        giftOrder.setSalesMoney(huiminCard.getSalesMoney());
        giftOrder.setAppUserId(students.get(0).getAppUserId());
        giftOrder.setStudentId(String.valueOf(studentId));
        giftOrder.setEndTime(calculateEndTime(huiminCard.getHuiMinType(), currentTime));

        // STEP 4: 以赠送类型保存已支付订单，保留卡面金额但不参与售卖金额统计。
        giftOrder.setInsertTime(currentTime);
        giftOrder.setPaymentTime(currentTime);
        giftOrder.setPaymentType(HuiminCardPaymentTypeEnum.GIFT.getCode());
        giftOrder.setStatus(HuiminCardPaymentStatusEnum.PAID.getCode());
        giftOrder.setRefundStatus(HuiminCardRefundStatusEnum.PENDING_REFUND.getCode());
        giftOrder.setCardId(huiminCard.getId());
        giftOrder.setCode(UUIDUtil.getTimeStr() + UUIDUtil.getNumberRandom(5));
        payHuiminService.save(giftOrder);
    }

    /**
     * 根据惠民卡类型计算有效期。
     *
     * @param cardType    惠民卡类型
     * @param currentTime 当前时间
     * @return 有效期结束时间；未知类型时返回 null
     */
    private Date calculateEndTime(Integer cardType, Date currentTime) {
        if (HuiminCardTypeEnum.ANNUAL_CARD.matches(cardType)) {
            LocalDateTime expirationTime = LocalDateTime.now().plusDays(ANNUAL_CARD_VALID_DAYS);
            return Date.from(expirationTime.atZone(ZoneId.systemDefault()).toInstant());
        }
        if (HuiminCardTypeEnum.CURRENT_YEAR_CARD.matches(cardType)) {
            Calendar calendar = Calendar.getInstance();
            calendar.setTime(currentTime);
            calendar.set(Calendar.MONTH, YEAR_END_MONTH);
            calendar.set(Calendar.DAY_OF_MONTH, YEAR_END_DAY);
            calendar.set(Calendar.HOUR_OF_DAY, DAY_END_HOUR);
            calendar.set(Calendar.MINUTE, DAY_END_MINUTE);
            calendar.set(Calendar.SECOND, DAY_END_SECOND);
            calendar.set(Calendar.MILLISECOND, 0);
            return calendar.getTime();
        }
        return null;
    }
}