<?php
/**
 *
 * This PayPal Checkout API handler class is a custom PHP library to handle the PayPal REST API calls.
 *
 * @class   PaypalCheckout
 * @author  CodexWorld
 * @link    https://www.codexworld.com
 * @version 1.0
 */

// Include the configuration file
include_once 'config.php';

class PaypalCheckout
{
    //public $paypalAuthAPI = PAYPAL_SANDBOX ? 'https://api-m.sandbox.paypal.com/v1/oauth2/token' : 'https://api-m.paypal.com/v1/oauth2/token';
    //public $paypalAPI = PAYPAL_SANDBOX ? 'https://api-m.sandbox.paypal.com/v2/checkout' : 'https://api-m.paypal.com/v2/checkout';

    public $paypalAuthAPI = PAYPAL_BASE_URL.'/v1/oauth2/tocken';
    public $paypalAPI = PAYPAL_BASE_URL.'/v2/checkout';
    public $paypalClientID = PAYPAL_CLIENT_ID;
    private $paypalSecret = PAYPAL_CLIENT_SECRET;

    public function generateAccessToken()
    {

        $ch = curl_init();
        curl_setopt($ch, CURLOPT_VERBOSE, 1);
        curl_setopt($ch, CURLOPT_URL, $this->paypalAuthAPI);
        curl_setopt($ch, CURLOPT_HEADER, false);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
        curl_setopt($ch, CURLOPT_POST, true);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_USERPWD, $this->paypalClientID . ":" . $this->paypalSecret);
        curl_setopt($ch, CURLOPT_POSTFIELDS, "grant_type=client_credentials");
        $auth_response = json_decode(curl_exec($ch));
        $http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
        curl_close($ch);

        if ($http_code != 200 && !empty($auth_response->error)) {
            throw new Exception('Failed to generate Access Token: ' . $auth_response->error . ' >>> ' . $auth_response->error_description);
        }

        if (!empty($auth_response)) {
            return $auth_response->access_token;
        } else {
            return false;
        }
    }

    public function createOrder($productInfo, $paymentSource)
    {
        $accessToken = $this->generateAccessToken();
        if (empty($accessToken)) {
            return false;
        } else {
            $postParams = $productInfo;

            $ch = curl_init();
            curl_setopt($ch, CURLOPT_URL, $this->paypalAPI . '/orders/');
            curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
            curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);

            curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-Type: application/json', 'Authorization: Bearer ' . $accessToken));
            curl_setopt($ch, CURLOPT_POST, true);
            curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($postParams));

            $api_resp = curl_exec($ch);
            $api_data = json_decode($api_resp, true);
            $http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
            curl_close($ch);

            if ($http_code != 200 && $http_code != 201) {
                throw new Exception('Failed to create Order sl (' . $http_code . '): ' . $api_resp . json_encode($postParams));
            }

            return !empty($api_data) && ($http_code == 200 || $http_code == 201) ? $api_data : false;
        }
    }

    public function captureOrder($orderId)
    {
        $accessToken = $this->generateAccessToken();
        if (empty($accessToken)) {
            return false;
        } else {
            $ch = curl_init();
            curl_setopt($ch, CURLOPT_URL, $this->paypalAPI . '/orders/' . $orderId . '/capture');
            curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
            curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
            curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-Type: application/json', 'Authorization: Bearer ' . $accessToken));

            curl_setopt($ch, CURLOPT_POST, true);
            $api_resp = curl_exec($ch);
            $api_data = json_decode($api_resp, true);
            $http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
            $curlsl_code = curl_getinfo($ch, CURLINFO_EFFECTIVE_URL);
            //  $result = urldecode ($ch );


            $http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);


            if ($http_code != 200 && $http_code != 201) {

                throw new Exception('Failed to create Order sl4(' . $http_code . '): ' . '1- ' . $api_resp);
            }

            curl_close($ch);
            return !empty($api_data) && ($http_code == 200 || $http_code == 201) ? $api_data : false;
        }
    }
}