<?php

namespace App\Payments;

use GuzzleHttp\Exception\GuzzleException;
use GuzzleHttp\Client;

class EasyPay
{
    /**
     * @var string
     */
    public $PartnerKey;

    /**
     * @var string
     */
    public $locale;

    /**
     * @var string
     */
    private $requestedSessionId;

    /**
     * @var string
     */
    private $pageId;

    /**
     * @var string
     */
    private $appId;

    /**
     * @var string
     */
    private $appId;

    private $client;

    public function __construct($payment_info = [])
    {
        foreach ($payment_info as $key => $info) {
            $this->$key = $info;
        }
        $this->client = $client = new Client(['base_uri' => 'https://api.easypay.ua/']);
    }

    /**
     * This method should be called when the user first accesses the payment page.
     * If the browser or device changes, the method is called again.
     * @return mixed
     * @throws GuzzleException
     */
    public function createApp()
    {
        $request = $this->client->request('POST', 'api/system/createApp', [
            'headers' => [
                'PartnerKey' => $this->PartnerKey,
                'locale' => $this->locale,
            ]
        ]);

        $response = json_decode($request->getBody()->getContents());

        if (!$response->error) {
            $this->appId = $response->appId;
            $this->requestedSessionId = $response->requestedSessionId;
            $this->pageId = $response->pageId;
        }

        return $response;
    }


    /**
     * Creates a new session instance for the user along with the data storage pages.
     * The lifetime of the session 20 minutes.
     * @return mixed
     * @throws GuzzleException
     */
    public function createSession()
    {
        $request = $this->client->request('POST', 'api/system/createSession', [
            'headers' => [
                'PartnerKey' => $this->PartnerKey,
                'locale' => $this->locale,
                'AppId' => $this->appId
            ]
        ]);

        $response = json_decode($request->getBody()->getContents());

        if (!$response->error) {
            $this->appId = $response->appId;
            $this->requestedSessionId = $response->requestedSessionId;
            $this->pageId = $response->pageId;
        }

        return $response;
    }

    /**
     * Creates a new instance of the storage page.
     * When a user opens a new page for payment, a new page ID must be created.
     * @return mixed
     * @throws GuzzleException
     */
    public function createPage()
    {
        $request = $this->client->request('POST', 'api/system/createPage', [
            'headers' => [
                'PartnerKey' => $this->PartnerKey,
                'locale' => $this->locale,
                'AppId' => $this->appId,
                'requestedSessionId' => $this->requestedSessionId
            ]
        ]);

        $response = json_decode($request->getBody()->getContents());

        if (!$response->error) {
            $this->appId = $response->appId;
            $this->requestedSessionId = $response->requestedSessionId;
            $this->pageId = $response->pageId;
        }

        return $response;
    }

    public function createOrder()
    {
        $request = $this->client->request('POST', 'api/system/createPage', [
            'headers' => [
                'PartnerKey' => $this->PartnerKey,
                'locale' => $this->locale,
                'AppId' => $this->appId,
                'requestedSessionId' => $this->requestedSessionId,
                'PageId' => $this->pageId,
                'Sign' => base64_encode(hash('sha256', $this->))
            ]
        ]);

        $response = json_decode($request->getBody()->getContents());

        return $response;
    }
}