package com.xiaopeng.account.service.impl;

import com.alibaba.fastjson2.JSONArray;
import com.alibaba.fastjson2.JSONObject;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.google.common.collect.Lists;
import com.xiaopeng.account.mapper.XpAppUserCouponMapper;
import com.xiaopeng.account.model.dto.ReceiveCouponDto;
import com.xiaopeng.account.model.dto.SendCouponDto;
import com.xiaopeng.account.model.query.XpUserCouponListQuery;
import com.xiaopeng.account.model.vo.XpAppUserCouponListVo;
import com.xiaopeng.account.model.vo.XpAppUserCouponTotalVo;
import com.xiaopeng.account.model.vo.XpAppUserCouponVo;
import com.xiaopeng.account.service.IXpAppUserCouponService;
import com.xiaopeng.account.util.holiday.HolidayUtil;
import com.xiaopeng.api.dto.account.NavigationCouponPickerRequest;
import com.xiaopeng.api.dto.account.UcUserInfo;
import com.xiaopeng.api.enums.NavigationCouponBubbleType;
import com.xiaopeng.api.vo.account.NavigationCouponItemVo;
import com.xiaopeng.api.vo.account.NavigationCouponPickerVo;
import com.xiaopeng.api.feignClient.account.UserResourcesClient;
import com.xiaopeng.api.feignClient.operation.XpCouponClient;
import com.xiaopeng.api.feignClient.operation.XpWhiteListClient;
import com.xiaopeng.api.model.account.XpAppUserCoupon;
import com.xiaopeng.api.model.operation.XpCoupon;
import com.xiaopeng.common.core.domain.R;
import com.xiaopeng.common.core.utils.DateUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.scheduling.annotation.Async;
import org.springframework.stereotype.Service;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.Comparator;
import java.util.List;
import java.util.Objects;
import java.util.stream.Collectors;

/**
 * <p>
 * 用户优惠券 服务实现类
 * </p>
 *
 * @author mitao
 * @since 2026-02-03
 */
@Service
public class XpAppUserCouponServiceImpl extends ServiceImpl<XpAppUserCouponMapper, XpAppUserCoupon> implements IXpAppUserCouponService {

    @Autowired
    private HolidayUtil holidayUtil;

    @Autowired
    private XpCouponClient xpCouponClient;

    @Autowired
    private XpWhiteListClient xpWhiteListClient;

    @Autowired
    private UserResourcesClient userResourcesClient;


    /**
     * 获取用户优惠券列表
     *
     * @param query
     * @param uid
     * @return
     */
    @Override
    public XpAppUserCouponVo userCouponList(XpUserCouponListQuery query, String uid) {
        Page<XpAppUserCouponListVo> page = new Page<>(query.getPageNum(), query.getPageSize());
        Page<XpAppUserCouponListVo> list = baseMapper.userCouponList(page, query, Long.valueOf(uid));
        XpAppUserCouponVo vo = new XpAppUserCouponVo();
        vo.setTotal((int) page.getTotal());
        vo.setList(list.getRecords());
        return vo;
    }

    /**
     * 获取用户优惠券数量total
     *
     * @param uid
     * @return
     */
    @Override
    public XpAppUserCouponTotalVo userCouponTotal(String uid) {
        List<XpAppUserCoupon> couponList = baseMapper.selectList(new LambdaQueryWrapper<XpAppUserCoupon>().eq(XpAppUserCoupon::getAppUserId, uid));
        XpAppUserCouponTotalVo vo = new XpAppUserCouponTotalVo();
//        vo.setAwaitReceiveNum((int) couponList.stream().filter(e -> e.getStatus() == 0).count());
        vo.setAvailableNum((int) couponList.stream().filter(e -> e.getStatus() == 1).count());
        vo.setUsedNum((int) couponList.stream().filter(e -> e.getStatus() == 2).count());
        vo.setExpiredNum((int) couponList.stream().filter(e -> e.getStatus() == 3).count());
        return vo;
    }

    /**
     * 领取优惠券
     *
     * @param dto
     * @param uid
     * @return
     */
    @Override
    public boolean receive(ReceiveCouponDto dto, String uid) {
        XpAppUserCoupon coupon = baseMapper.selectById(dto.getCouponId());
        if (coupon.getAppUserId().toString().equals(uid)) {
            coupon.setStatus(1);
            return updateById(coupon);

        }
        return false;
    }

    /**
     * 时间规则
     *
     * @param couponList
     * @return
     */
    @Override
    public List<XpAppUserCoupon> timeRule(List<XpAppUserCoupon> couponList) {
        List<XpAppUserCoupon> xpAppUserCoupons = new ArrayList<>();

        for (XpAppUserCoupon coupon : couponList) {
            String timeJson = coupon.getTimeJson();
            Boolean inOperationTime = isInOperationTime(timeJson);
            if (inOperationTime) {
                xpAppUserCoupons.add(coupon);
            }
        }

        return xpAppUserCoupons;
    }

    /**
     * 发送优惠券
     *
     * @param dto
     * @return
     */
    @Override
    @Async("couponSendExecutor")
    public R<String> send(SendCouponDto dto) {

        R<XpCoupon> coupon = xpCouponClient.getCouponById(dto.getCouponId());
        if (coupon != null) {
            XpCoupon xpCoupon = coupon.getData();
            if (dto.getPhone() == null || dto.getPhone().isEmpty()) {
                // 全部发放
                R<List<String>> allWhiteList = xpWhiteListClient.getAllWhiteList();
                if (allWhiteList != null) {
                    List<String> phoneList = allWhiteList.getData();
                    dto.setPhone(phoneList);

                }
            }
            for (String phone : dto.getPhone()) {
                UcUserInfo userByMobile = userResourcesClient.getUserByMobile(phone);
                if (userByMobile != null) {
                    Long uid = userByMobile.getUid();
                    XpAppUserCoupon xpAppUserCoupon = new XpAppUserCoupon();
                    xpAppUserCoupon.setFullMoney(xpCoupon.getConditionalAmount());
                    xpAppUserCoupon.setMoney(xpCoupon.getAmount());
                    xpAppUserCoupon.setCouponId(dto.getCouponId());
                    xpAppUserCoupon.setAppUserId(uid);
                    xpAppUserCoupon.setExpirationTime(LocalDateTime.now().plusDays(7));
                    xpAppUserCoupon.setStatus(1);
                    xpAppUserCoupon.setCouponType(xpCoupon.getCouponType());
                    xpAppUserCoupon.setPhone(phone);

                    xpAppUserCoupon.setCouponName(xpCoupon.getCouponName());
                    xpAppUserCoupon.setOpenCityId("0");
                    xpAppUserCoupon.setTimeJson("[{\"time\": [\"00:00-23:59\"], \"type\": 3, \"typeStr\": 0}]");
                    baseMapper.insert(xpAppUserCoupon);
                }
            }
        }

        return null;
    }

    @Override
    public Integer getUserCouponNum(String uid) {
        if (uid == null) {
            return 0;
        }
        Long num = baseMapper.selectCount(new LambdaQueryWrapper<XpAppUserCoupon>().eq(XpAppUserCoupon::getAppUserId, uid).eq(XpAppUserCoupon::getStatus, 1).lt(XpAppUserCoupon::getExpirationTime, LocalDateTime.now()));
        return num.intValue();
    }


    /**
     * 是否在运营内
     *
     * @param timeJson 规则json字符串
     * @return
     */
    private Boolean isInOperationTime(String timeJson) {
        JSONArray jsonArray = JSONArray.parseArray(timeJson);
        Integer holidayToday = holidayUtil.isHolidayToday();
        for (Object o : jsonArray) {
            JSONObject jsonObject = JSONObject.parseObject(o.toString());
            String type = jsonObject.getString("type");
            if (type.equals(holidayToday.toString())) {
                JSONArray time = jsonObject.getJSONArray("time");
                // 判断当前时间 是否在time时间段中
                for (Object object : time) {
                    String[] timeArray = object.toString().split("-");
                    String startTime = timeArray[0];
                    String endTime = timeArray[1];
                    boolean currentTimeInRange = DateUtils.isCurrentTimeInRange(startTime, endTime);
                    if (currentTimeInRange) {
                        return true;
                    }
                }
            } else if (type.equals("3")) {
                // 判断是什么类型 0每天  1-7 想起
                String typeStr = jsonObject.getString("typeStr");
                // 查看今天周几
                Integer week = DateUtils.getWeek();
                // 包含每天 或者  包含当天
                if (typeStr.contains("0") || typeStr.contains(week.toString())) {
                    JSONArray time = jsonObject.getJSONArray("time");
                    // 判断当前时间 是否在time时间段中
                    for (Object object : time) {
                        String[] timeArray = object.toString().split("-");
                        String startTime = timeArray[0];
                        String endTime = timeArray[1];
                        boolean currentTimeInRange = DateUtils.isCurrentTimeInRange(startTime, endTime);
                        if (currentTimeInRange) {
                            return true;
                        }
                    }
                }

            }
        }
        return false;
    }

    @Override
    public NavigationCouponPickerVo navigationCouponPicker(Long userId, NavigationCouponPickerRequest req) {
        NavigationCouponPickerVo vo = new NavigationCouponPickerVo();
        double orderAmount = req.getOrderAmount() == null ? 0d : req.getOrderAmount();
        List<XpAppUserCoupon> couponList = baseMapper.selectList(new LambdaQueryWrapper<XpAppUserCoupon>()
                .eq(XpAppUserCoupon::getStatus, 1)
                .eq(XpAppUserCoupon::getAppUserId, userId)
                .apply("(FIND_IN_SET({0}, open_city_id) or open_city_id='0')", req.getOpenCityId()));
        couponList = timeRule(couponList);

        Long bestId = null;
        double bestEff = -1d;
        LocalDateTime bestExp = null;
        for (XpAppUserCoupon c : couponList) {
            if (!couponAmountAvailable(c, orderAmount)) {
                continue;
            }
            double eff = effectiveDiscountAmount(c, orderAmount);
            if (eff <= 0) {
                continue;
            }
            LocalDateTime exp = c.getExpirationTime();
            if (bestId == null || eff > bestEff + 1e-6
                    || (Math.abs(eff - bestEff) < 1e-6 && exp != null && bestExp != null && exp.isBefore(bestExp))
                    || (Math.abs(eff - bestEff) < 1e-6 && bestExp == null && exp != null)) {
                bestId = c.getId();
                bestEff = eff;
                bestExp = exp;
            }
        }
        vo.setRecommendedUserCouponId(bestId);

        Long selected = req.getSelectedUserCouponId();
        Long applied;
        if (selected != null && selected == 0L) {
            applied = null;
        } else if (selected != null && selected > 0L) {
            XpAppUserCoupon chosen = couponList.stream().filter(c -> selected.equals(c.getId())).findFirst().orElse(null);
            if (chosen != null && couponAmountAvailable(chosen, orderAmount)) {
                applied = selected;
            } else {
                applied = null;
            }
        } else {
            applied = bestId;
        }
        vo.setAppliedUserCouponId(applied);

        long availCount = couponList.stream().filter(c -> couponAmountAvailable(c, orderAmount)).count();
        if (availCount == 0) {
            vo.setBubbleType(NavigationCouponBubbleType.HIDDEN);
            List<NavigationCouponItemVo> hiddenItems = buildNavigationItems(couponList, orderAmount, bestId, applied);
            vo.setItems(hiddenItems);
            vo.setListTotalCount(hiddenItems.size());
            return vo;
        }
        if (applied == null) {
            vo.setBubbleType(NavigationCouponBubbleType.MULTI_AVAILABLE);
            vo.setAvailableCouponCount((int) availCount);
        } else {
            vo.setBubbleType(NavigationCouponBubbleType.SELECTED);
            XpAppUserCoupon ap = couponList.stream().filter(c -> applied.equals(c.getId())).findFirst().orElse(null);
            vo.setSelectedDiscountAmount(ap != null ? effectiveDiscountAmount(ap, orderAmount) : 0d);
        }
        List<NavigationCouponItemVo> items = buildNavigationItems(couponList, orderAmount, bestId, applied);
        vo.setItems(items);
        vo.setListTotalCount(items.size());
        return vo;
    }

    private List<NavigationCouponItemVo> buildNavigationItems(List<XpAppUserCoupon> couponList, double orderAmount,
            Long bestId, Long appliedId) {
        List<NavigationCouponItemVo> raw = new ArrayList<>();
        for (XpAppUserCoupon c : couponList) {
            NavigationCouponItemVo it = new NavigationCouponItemVo();
            it.setUserCouponId(c.getId());
            it.setCouponName(c.getCouponName());
            it.setCouponType(c.getCouponType());
            it.setDiscountMoney(c.getMoney() != null ? c.getMoney().doubleValue() : 0d);
            it.setFullMoney(c.getFullMoney() != null ? c.getFullMoney().doubleValue() : null);
            it.setExpireTime(c.getExpirationTime());
            boolean ok = couponAmountAvailable(c, orderAmount);
            it.setAvailable(ok);
            if (c.getCouponType() != null && c.getCouponType() == 2) {
                it.setThresholdLabel("满" + moneyStr(c.getFullMoney()) + "元可用");
                if (!ok) {
                    it.setUnavailableReason("未满足使用门槛");
                }
            } else {
                it.setThresholdLabel("无门槛");
            }
            it.setBestOffer(bestId != null && bestId.equals(c.getId()));
            it.setSelected(appliedId != null && appliedId.equals(c.getId()));
            raw.add(it);
        }
        List<NavigationCouponItemVo> available = raw.stream().filter(x -> Boolean.TRUE.equals(x.getAvailable()))
                .sorted(Comparator
                        .comparing((NavigationCouponItemVo x) -> !Boolean.TRUE.equals(x.getBestOffer()))
                        .thenComparing((NavigationCouponItemVo x) -> -effectiveDiscountAmount(findCoupon(couponList, x.getUserCouponId()), orderAmount))
                        .thenComparing(NavigationCouponItemVo::getExpireTime, Comparator.nullsLast(Comparator.naturalOrder())))
                .collect(Collectors.toList());
        List<NavigationCouponItemVo> unavailable = raw.stream().filter(x -> !Boolean.TRUE.equals(x.getAvailable()))
                .sorted(Comparator.comparing(NavigationCouponItemVo::getExpireTime, Comparator.nullsLast(Comparator.naturalOrder())))
                .collect(Collectors.toList());
        available.addAll(unavailable);
        return available;
    }

    private static XpAppUserCoupon findCoupon(List<XpAppUserCoupon> list, Long id) {
        return list.stream().filter(c -> Objects.equals(c.getId(), id)).findFirst().orElse(null);
    }

    private static String moneyStr(BigDecimal b) {
        if (b == null) {
            return "0";
        }
        return b.stripTrailingZeros().toPlainString();
    }

    private static boolean couponAmountAvailable(XpAppUserCoupon c, double orderAmount) {
        if (c.getCouponType() == null || c.getCouponType() == 1) {
            return true;
        }
        if (c.getCouponType() == 2) {
            return c.getFullMoney() != null && orderAmount >= c.getFullMoney().doubleValue();
        }
        return true;
    }

    private static double effectiveDiscountAmount(XpAppUserCoupon c, double orderAmount) {
        if (c == null || c.getMoney() == null) {
            return 0d;
        }
        double m = c.getMoney().doubleValue();
        if (!couponAmountAvailable(c, orderAmount)) {
            return 0d;
        }
        return Math.min(orderAmount, m);
    }

}