<?php


namespace Komma\Ratings;

use Facebook\Authentication\AccessToken;
use Facebook\Exceptions\FacebookResponseException;
use Facebook\Exceptions\FacebookSDKException;
use Facebook\Facebook;

class FacebookService
{
    private $facebook;

    private $appId = '1607477276198130';
    private $appSecret = 'e5736586c1efa912705e4256ff7cce68';
    private $accessToken = 'EAAW1ZCfgIRPIBACNKiw3qFAjD2qZAX279pkW3EZCrokR6a9QRjRrjZBTo9h2lr8Dq7ZAjmHfSq3OKkjwDpZC49LdyPQRTJOolUFC4JzpaGlOweQAK0PZCuyyMTupsPL6e1DCRx3ufkwhsgOGBugyE0x7VOjWCNNZAf9JcdyVdy0k5gI63XoqNUSS1zqhvSgcfuqzk5GWWnOB2QZDZD';
    private $redirectUrl = 'http://tandartsmaas.komma.pro/facebook/getPageToken';
   // private $pageToken = 'CAAW1ZCfgIRPIBAINl2ioxnNCGwIapJCf44ihUndBEqutb8KrCucxQeqnuQgOTOgWDh7ZCrYDLeEFLDqMALZBZCYkf2rEZBeOBdxHZBVUFKpeeaYcHZCPyDah79DdpMcMHLekPRTAWduydlvsKstfDr3YE52c5EZASVyQfugsV1NDffuzRWVZAqOgG';

    public function __construct()
    {

        $accessToken = new AccessToken($this->accessToken);

        $this->facebook = new Facebook([
            'app_id' => $this->appId,
            'app_secret' => $this->appSecret,
            'default_graph_version' => 'v2.10',
            'default_access_token' => $accessToken
        ]);

       // dd( $this->facebook );
        //dd( $this->facebook->get('/me/accounts') );
        //https://developers.facebook.com/docs/facebook-login/access-tokens
        //https://developers.facebook.com/docs/facebook-login/access-tokens/expiration-and-extension#long-via-code

    }

    /*
     * Represents a Facebook Session, which is used when making requests to the Graph API.
     * Get session for app-level requests:
     */
//    public function session()
//    {
//        FacebookSession::setDefaultApplication($this->appId, $this->appSecret);
//        return new FacebookSession($this->pageToken);
//    }

    public function getRatings()
    {
        $fbRequest = $this->request('/766764863364715/ratings');

        if($fbRequest != false) return $fbRequest->getGraphEdge();

        return false;

//        return $this->request('/766764863364715/ratings');
    }

    public function getProfilePicById($id)
    {
        $fbRequest = $this->request('/' . $id . '/picture?redirect=false');

        if($fbRequest != false) return $fbRequest->getGraphObject();

        return false;
        //return $this->request('/' . $id . '/picture?redirect=false');
    }

    private function request($url)
    {

        try
        {
            $response = $this->facebook->get($url);
        }
        catch (FacebookResponseException $e){
            // When Graph returns an error
            //echo 'Graph returned an error: ' . $e->getMessage();
            //exit;
            return false;
        } catch(FacebookSDKException $e) {
            // When validation fails or other local issues
            //echo 'Facebook SDK returned an error: ' . $e->getMessage();
            //exit;
            return false;
        }

        return $response;
    }




    /*
    |--------------------------------------------------------------------------
    | Get Page Token: 1 The OAuth Dialog
    |--------------------------------------------------------------------------
    |
    | First, register a Facebook application and obtain an application Id and secret.
    | Now, within your website, create with a page that can only be accessed by your
    | site’s admins. This page will provide a button to invoke the OAuth Dialog
    | popup which will allow your admins to log into Facebook using your FB app.
    |
    */
    public function ShowOAuthDialog()
    {

        return '<a href="https://www.facebook.com/dialog/oauth?client_id=' . $this->appId . '&redirect_uri=' . $this->redirectUrl . '&scope=manage_pages&state=code">Login</a>';
    }

    public function getPageToken()
    {
        // Retrieve Short Lived Token
        $result = file_get_contents('https://graph.facebook.com/oauth/access_token?client_id=' . $this->appId . '&client_secret=' . $this->appSecret . '&code=' . \Input::get('code'). '&redirect_uri=' . $this->redirectUrl);
        $shortTokenData = [];
        parse_str($result,$shortTokenData);

        // Use Short Lived Token to retrieve Long Lived Token
        $result = file_get_contents('https://graph.facebook.com/oauth/access_token?grant_type=fb_exchange_token&client_id=' . $this->appId . '&client_secret=' . $this->appSecret . '&fb_exchange_token=' . $shortTokenData['access_token']);
        $longTokenData = [];
        parse_str($result,$longTokenData);

        // Use Long Lived Token to retrieve page data from the which the user is an admin
        $result = file_get_contents('https://graph.facebook.com/me/accounts?access_token=' . $longTokenData['access_token']);
        $json = json_decode($result);

        // Page data
        echo '<pre>';
        dd($json) ;
    }
}