<?php

namespace App\Services;

use App\Model\UserCoupon;

/**
 * 用户优惠卷
 */
class UserCouponService extends BaseService
{
    /**
     * 获取患者问诊可用的优惠卷
     * @param string|int $user_id
     * @param string|int $inquiry_type
     * @return array
     */
    public function getUserInquiryUsableCoupon(string|int $user_id, string|int $inquiry_type): array
    {
        $user_coupons = UserCoupon::getUserInquiryUsableCoupon($user_id, $inquiry_type);
        if (empty($user_coupons)) {
            return array();
        }

        // 选中的优惠卷
        $selected_coupons = array();

        // 优惠卷最高金额
        $coupon_high_price = 0;

        // 是否存在互斥卷
        $is_mutex = 0;

        // 可选择优惠卷中是否存在互斥卷
        foreach ($user_coupons as $coupon) {
            if ($coupon['is_mutex'] == 1) {
                $is_mutex = 1;
            }
        }

        foreach ($user_coupons as $coupon) {
            if (empty($selected_coupon)) {
                $selected_coupons[] = $coupon; // 选中的优惠卷数据

                $coupon_high_price = $coupon['coupon_price'];
                continue;
            }

            // 处理存在互斥卷情况
            if ($is_mutex == 1) {
                // 选择金额最高的为选中
                if ($coupon['coupon_price'] < $coupon_high_price){
                    continue;
                }

                if ($coupon['coupon_price'] > $coupon_high_price) {
                    $coupon_high_price = $coupon['coupon_price'];

                    // 选中的优惠卷数据置空
                    $selected_coupons = array();
                    $selected_coupons[] = $coupon;

                    continue;
                }
            }

            $selected_coupons[] = $coupon; // 选中的优惠卷数据
        }

        return $selected_coupons;
    }

    // 获取可用优惠卷总金额
    public function getCouponTotalPrice(array $coupons): int
    {
        $coupon_total_price = 0;

        foreach ($coupons as $coupon){
            $coupon_total_price = bcadd($coupon_total_price,$coupon['coupon_price'],2);
        }

        return $coupon_total_price;
    }
}