<?php

namespace App\Http\Services;


class VNPayService
{
    /**
     * Verify return data from VNPAY
     *
     * @param array $data
     * @return array
     */
    public function verifyPayment(array $data)
    {
        $vnp_SecureHash = $data['vnp_SecureHash'] ?? '';
        $inputData = [];
        foreach ($data as $key => $value) {
            if (substr($key, 0, 4) == "vnp_") {
                $inputData[$key] = $value;
            }
        }

        unset($inputData['vnp_SecureHash']);
        ksort($inputData);
        $i = 0;
        $hashData = "";
        foreach ($inputData as $key => $value) {
            if ($i == 1) {
                $hashData = $hashData . '&' . urlencode($key) . "=" . urlencode($value);
            } else {
                $hashData = $hashData . urlencode($key) . "=" . urlencode($value);
                $i = 1;
            }
        }

        $secureHash = hash_hmac('sha512', $hashData, config('vnpay.hash_secret'));

        $result = [
            'isValid' => ($secureHash == $vnp_SecureHash),
            'data' => $data,
            'isSuccess' => (($secureHash == $vnp_SecureHash) && ($data['vnp_ResponseCode'] == '00'))
        ];

        return $result;
    }
}