<?php

namespace App\Http\logic\api;

use App\Models\UserCoupon;
use App\Services\CouponService;

/**
 * 优惠券业务逻辑层
 *
 * 处理优惠券相关的请求：列表获取、使用前验证
 */
class CouponLogic extends BaseApiLogic
{
    /** @var CouponService */
    protected $couponService;

    public function __construct()
    {
        $this->couponService = new CouponService();
    }

    /**
     * 获取用户优惠券列表（含自动发放）
     *
     * @param int $userId
     * @return array
     */
    public function getList($userId)
    {
        $result = $this->couponService->getCouponList($userId);

        // 格式化返回给前端
        $formattedList = [];
        foreach ($result['list'] as $coupon) {
            $formattedList[] = $this->formatCoupon($coupon);
        }

        $formattedNew = [];
        foreach ($result['new_issued'] as $coupon) {
            $formattedNew[] = $this->formatCoupon((object) $coupon);
        }

        return [
            'list'       => $formattedList,
            'new_issued' => $formattedNew,
        ];
    }

    /**
     * 验证优惠券是否可用于充值
     *
     * @param int   $couponId
     * @param int   $userId
     * @param float $payAmt 充值金额（元）
     * @return array|false  成功返回优惠券信息，失败返回false
     */
    public function validateForPayment($couponId, $userId, $payAmt)
    {
        $validation = $this->couponService->validateCoupon($couponId, $userId, $payAmt);

        if (!$validation['valid']) {
            $this->error = $validation['error'];
            return false;
        }

        return $validation['coupon'];
    }

    /**
     * 格式化优惠券数据为前端友好格式
     *
     * @param object $coupon
     * @return array
     */
    protected function formatCoupon($coupon)
    {
        $typeLabel = $coupon->coupon_type == UserCoupon::TYPE_FIXED ? 'fixed' : 'percent';

        // 构建描述文案
        if ($coupon->coupon_type == UserCoupon::TYPE_FIXED) {
            $desc = "+{$coupon->coupon_value} bonus";
        } else {
            $desc = "+{$coupon->coupon_value}% bonus";
            if ($coupon->max_bonus > 0) {
                $desc .= " (max {$coupon->max_bonus})";
            }
        }

        return [
            'id'           => (int) $coupon->id,
            'name'         => $coupon->coupon_name,
            'type'         => $typeLabel,
            'type_id'      => (int) $coupon->coupon_type,
            'value'        => (float) $coupon->coupon_value,
            'min_recharge' => (float) $coupon->min_recharge,
            'max_bonus'    => (float) $coupon->max_bonus,
            'desc'         => $desc,
            'status'       => (int) $coupon->status,
            'expire_at'    => $coupon->expire_at,
            'issued_at'    => $coupon->issued_at ?? '',
            'expire_in_seconds' => $coupon->expire_in_seconds ?? 0,
        ];
    }
}