<?php

namespace App\Services;

use App\Models\{User, Vip, UserVip, PayLog, Coupon};
use App\Exceptions\BizException;
use App\Enums\{PayWay, SocialiteType, WxpayTradeType};
use App\Services\Payment\WxpayService;
use Carbon\Carbon;

class VipService
{
    public function buy(User $user, Vip $vip)
    {
        if (!$vip->status) {
            throw new BizException('该会员卡已关闭');
        }
        $user_vip = $user->vips()->create([
            'vip_id' => $vip->id,
            'name' => $vip->name,
            'price' => $vip->price,
            'times' => $vip->times,
            'gift' => $vip->gift,
        ]);

        return $user_vip;
    }

    public function pay(UserVip $userVip, $pay_way = '')
    {
        if (!$pay_way) {
            $pay_way = PayWay::WxpayMiniProgram->value;
        }
        if ($userVip->status == 2) {
            throw new BizException('支付处理中,请勿重复操作');
        }
        $userVip->update([
            'status' => 2
        ]);
        $pay_log = PayLog::create([
            'payable_type' => UserVip::class,
            'payable_id' => $userVip->id,
            'pay_sn' => serial_number(),
            'pay_way' => $pay_way
        ]);
        $money = $userVip->price;
        $debug = config('app.debug');
        if ($debug) {
            $money = 1;
        }
        $user = $userVip->user;
        // 微信小程序支付
        if ($pay_log->pay_way === PayWay::WxpayMiniProgram) {
            $openid = $user->socialites()->where('socialite_type', SocialiteType::WechatMiniProgram)->value('socialite_id');
            if (!$openid && $debug) {
                $openid = 'oU7xS5UspzVvpPEBqKZuW6N9WXDg';
            }
            if (!$openid) {
                throw new BizException('未找到用户的微信授权信息, 无法使用微信支付');
            }
            $params = [
                'body' => app_settings('app.app_name').'-会员-' . $userVip->name,
                'out_trade_no' => $pay_log->pay_sn,
                'total_fee' => $money * 100,
                'trade_type' => WxpayTradeType::JSAPI->value,
                'openid' => $openid,
            ];
            return ['pay_way' => $pay_way, 'data' => (new WxpayService())->pay($params)];
        }
        throw new BizException('未知的支付方式');
    }

    /**
     * 购买成功
     * @param UserVip $userVip 购买记录
     * @param array $params {'pay_at':'购买时间'}
     */
    public function success(UserVip $userVip, array $params = null)
    {
        $userVip->update([
            'status' => 1,
            'success_time' => data_get($params, 'pay_at', now())
        ]);
        $user = $userVip->user;
        $vip_expired = $this->convertTimes(data_get($userVip->times, 'num'), data_get($userVip->times, 'unit'), $user->vip_expired);
        $userVip->user->update([
            'vip_expired' => $vip_expired
        ]);
        $this->gift($userVip);
    }

    /**
     * 发放赠品
     * @param UserVip $userVip 购买记录
     */
    public function gift(UserVip $userVip)
    {
        if ($userVip->status != 1) {
            throw new BizException('请先购买');
        }
        $user = $userVip->user;
        $gift = $userVip->gift;
        // 优惠券
        if (isset($gift['coupon'])) {
            $coupon_service = new CouponService();
            foreach(Coupon::whereIn('id', $gift['coupon'])->get() as $item) {
                try {
                    $coupon_service->sendCoupon($user, $item);
                } catch (BizException $e) {
                }
            }
        }

    }

    /**
     * 延长时限
     * 
     * @param int $num 数量
     * @param string $unit 单位
     * @return Carbon
     */
    public function convertTimes(int $num, string $unit, Carbon $start = null)
    {
        if (!$start) {
            $start = now();
        }
        switch ($unit) {
            case Vip::TIME_YEAR:
                $start->addYears($num);
                break;
            case Vip::TIME_MONTH:
                $start->addMonths($num);
                break;
            case Vip::TIME_DAY:
                $start->addDays($num);
                break;
            default:
                throw new BizException('未知的时间单位');
        }

        return $start;
    }
}