<?php

namespace App\Services;

use App\Exceptions\WeChatPayException;
use Closure;
use EasyWeChat\Factory;
use EasyWeChat\Payment\Application;

class WeChatPayService
{
    /**
     * 小程序交易类型
     * https://pay.weixin.qq.com/wiki/doc/api/app/app.php?chapter=4_2
     */
    public const TRADE_TYPE_JSAPI = 'JSAPI';    // JSAPI支付
    public const TRADE_TYPE_APP = 'APP';        // App支付
    public const TRADE_TYPE_NATIVE = 'NATIVE';  // Native支付
    public const TRADE_TYPE_H5 = 'MWEB';        // H5支付

    /**
     * @var array
     */
    public static $allowTradeTypes = [
        self::TRADE_TYPE_JSAPI,
        self::TRADE_TYPE_APP,
    ];

    /**
     * @var \EasyWeChat\Payment\Application
     */
    protected $app;

    /**
     * @param \EasyWeChat\Payment\Application|null $app
     */
    public function __construct(?Application $app = null)
    {
        if ($app === null) {
            $app = Factory::payment(config('wechat.payment.default'));
        }

        $this->app = $app;
    }

    /**
     * 支付
     *
     * @param array $params
     * @return array
     *
     * @throws \App\Exceptions\WeChatPayException
     */
    public function pay(array $params)
    {
        // 如果交易类型不存在，则使用 App 支付
        if (! isset($params['trade_type'])) {
            $params['trade_type'] = static::TRADE_TYPE_APP;
        }

        if (! in_array($params['trade_type'], static::$allowTradeTypes)) {
            throw new WeChatPayException(sprintf('交易类型 [%s] 暂不支持', $params['trade_type']), $params);
        }

        $result = $this->app->order->unify($params);

        if (data_get($result, 'return_code') !== 'SUCCESS') {
            throw new WeChatPayException(
                data_get($result, 'return_msg', '请求失败'),
                $params
            );
        }

        if (data_get($result, 'result_code') !== 'SUCCESS') {
            throw new WeChatPayException(
                sprintf(
                    '[%s] %s',
                    data_get($result, 'err_code', '-1'),
                    data_get($result, 'err_code_des', '交易失败')
                ),
                $params
            );
        }

        $prepayId = $result['prepay_id'];

        if ($params['trade_type'] === static::TRADE_TYPE_APP) {
            return $this->app->jssdk->appConfig($prepayId);
        }

        return $this->app->jssdk->bridgeConfig($prepayId, false);
    }

    /**
     * 支付结果通知
     *
     * @param \Closure $closure
     * @return \Symfony\Component\HttpFoundation\Response
     */
    public function handlePaidNotify(Closure $closure)
    {
        return $this->app->handlePaidNotify($closure);
    }
}