package com.xiaopeng.account.controller;


import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.xiaopeng.account.model.dto.ReceiveCouponDto;
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.api.dto.account.GetUserCouponDto;
import com.xiaopeng.api.feignClient.operation.XpOpenCityClient;
import com.xiaopeng.api.model.account.XpAppUserCoupon;
import com.xiaopeng.api.vo.account.UserCouponVo;
import com.xiaopeng.common.core.domain.R;
import com.xiaopeng.unifiedverification.interceptor.XpClientCheck;
import io.swagger.annotations.ApiOperation;
import org.springframework.web.bind.annotation.*;

import org.springframework.stereotype.Controller;

import javax.servlet.http.HttpServletRequest;
import java.util.Arrays;
import java.util.Comparator;
import java.util.List;
import java.util.stream.Collectors;

/**
 * <p>
 * 用户优惠券 前端控制器
 * </p>
 *
 * @author mitao
 * @since 2026-02-03
 */
@RestController
@RequestMapping("")
public class XpAppUserCouponController {


    private final IXpAppUserCouponService xpAppUserCouponService;
    private final XpOpenCityClient xpOpenCityClient;

    public XpAppUserCouponController(IXpAppUserCouponService xpAppUserCouponService, XpOpenCityClient xpOpenCityClient) {
        this.xpAppUserCouponService = xpAppUserCouponService;
        this.xpOpenCityClient = xpOpenCityClient;
    }


    @PostMapping("/inner/appUserCoupon/getUserCoupon")
    public R<UserCouponVo> getUserCoupon(@RequestBody GetUserCouponDto dto) {
        UserCouponVo userCouponVo = new UserCouponVo();
        // 获取用户所有优惠券
        List<XpAppUserCoupon> couponList = xpAppUserCouponService.list(new LambdaQueryWrapper<XpAppUserCoupon>().eq(XpAppUserCoupon::getStatus, 1).eq(XpAppUserCoupon::getAppUserId, dto.getUserId()).apply("FIND_IN_SET({0}, open_city_id)", dto.getOpenCityId()) );
        if(couponList.isEmpty()){
            return R.ok(userCouponVo);
        }
        // 计算使用时间规则
        couponList = xpAppUserCouponService.timeRule(couponList);
        if(couponList.isEmpty()){
            return R.ok(userCouponVo);
        }

        // 优先用满足条件且抵扣金额最大的
        List<XpAppUserCoupon> discountUserCoupons = couponList.stream().filter(e -> e.getCouponType() == 1).sorted(Comparator.comparing(XpAppUserCoupon::getMoney).reversed()).collect(Collectors.toList());
        if(!discountUserCoupons.isEmpty()){
            userCouponVo.setId(discountUserCoupons.get(0).getId());
            userCouponVo.setMoney(discountUserCoupons.get(0).getMoney().doubleValue());
            return R.ok(userCouponVo);
        }
        List<XpAppUserCoupon> fullUserCoupons = couponList.stream().filter(e -> e.getCouponType() == 2 && e.getFullMoney().doubleValue()>dto.getTotalAmount()).sorted(Comparator.comparing(XpAppUserCoupon::getMoney).reversed()).collect(Collectors.toList());
        if(!fullUserCoupons.isEmpty()){
            userCouponVo.setId(fullUserCoupons.get(0).getId());
            userCouponVo.setMoney(fullUserCoupons.get(0).getMoney().doubleValue());
            return R.ok(userCouponVo);
        }
        return R.ok(userCouponVo);
    }
    @PostMapping("/inner/appUserCoupon/useUserCoupon")
    public R useUserCoupon(@RequestBody GetUserCouponDto dto) {
        XpAppUserCoupon appUserCoupon = xpAppUserCouponService.getById(dto.getUserId());
        appUserCoupon.setStatus(2);
        xpAppUserCouponService.updateById(appUserCoupon);
        return R.ok();
    }




    /**
     * 获取优惠券列表
     */
    @PostMapping("/api/v1/mini-program/coupon/list")
    @ApiOperation(value = "获取用户获取优惠券列表", tags = {"小程序-获取用户获取优惠券列表"})
    @XpClientCheck(checkToken = false, checkOtpToken = true)
    public R<XpAppUserCouponVo> list(@RequestBody XpUserCouponListQuery query, HttpServletRequest request) {
        // uid已通过拦截器otp校验，可以直接使用
        String uid = request.getHeader("XP-Uid");
        XpAppUserCouponVo vo = xpAppUserCouponService.userCouponList(query, uid);
        return R.ok(vo);
    }

    /**
     * 领取优惠券
     */
    @PostMapping("/api/v1/mini-program/coupon/receive")
    @ApiOperation(value = "领取优惠券", tags = {"小程序-领取优惠券"})
    @XpClientCheck(checkToken = false, checkOtpToken = true)
    public R<String> receive(@RequestBody ReceiveCouponDto dto, HttpServletRequest request) {
        // uid已通过拦截器otp校验，可以直接使用
        String uid = request.getHeader("XP-Uid");
        boolean result = xpAppUserCouponService.receive(dto,uid);
        if(result){
            return R.ok();
        }
        return R.fail();
    }



    /**
     * 获取优惠券详情
     */
    @GetMapping("/api/v1/mini-program/coupon/detail/{couponId}")
    @ApiOperation(value = "获取用户获取优惠券详情", tags = {"小程序-获取用户获取优惠券详情"})
    @XpClientCheck(checkToken = false, checkOtpToken = true)
    public R<XpAppUserCouponListVo> detail(@PathVariable("couponId") Long couponId, HttpServletRequest request) {
        // uid已通过拦截器otp校验，可以直接使用
        String uid = request.getHeader("XP-Uid");
        XpAppUserCoupon coupon = xpAppUserCouponService.getById(couponId);
        if(uid.equals(coupon.getAppUserId().toString())){
            XpAppUserCouponListVo vo = new XpAppUserCouponListVo();
            vo.setCouponId(coupon.getId().toString());
            vo.setTitle(coupon.getCouponName());
            vo.setExpireTime(coupon.getExpirationTime());
            if("0".equals(vo.getCouponId())){
                vo.setApplicableCities(Arrays.asList("不限"));
            }else {
                R<List<String>> r = xpOpenCityClient.pageList(coupon.getOpenCityId());
                if(r.getCode()==200){
                    vo.setApplicableCities(r.getData());
                }
            }
            return R.ok(vo);
        }
        return R.ok(null);
    }

    /**
     * 获取优惠券列表total
     */
    @GetMapping("/api/v1/mini-program/coupon/total")
    @ApiOperation(value = "获取用户获取优惠券数量", tags = {"小程序-获取用户获取优惠券数量"})
    @XpClientCheck(checkToken = false, checkOtpToken = true)
    public R<XpAppUserCouponTotalVo> total(HttpServletRequest request) {
        // uid已通过拦截器otp校验，可以直接使用
        String uid = request.getHeader("XP-Uid");
        XpAppUserCouponTotalVo vo = xpAppUserCouponService.userCouponTotal(uid);
        return R.ok(vo);
    }


}