<?php
session_start();
require_once(userpro_vk_path . 'lib/vendor/autoload.php');
use VK\Client\VKApiClient;
use VK\OAuth\VKOAuth;
use VK\OAuth\Scopes\VKOAuthUserScope;
use VK\OAuth\VKOAuthResponseType;
use VK\OAuth\VKOAuthDisplay;

class VkAuth
{

	var $vk;
	var $vk_config;
    var $client_id,$client_secret,$redirect_uri;
	public function __construct()
	{
		add_action('init', array(&$this, 'loadVK'), 9);

		$this->client_id = 6495548;
		$this->client_secret = 'yWerZyUwPYCxLyxlYXNb';
		$this->redirect_uri = 'http://www.userproplugin.com/profile/';
		if(isset($_GET['code']))
		add_action('init', array(&$this, 'getAccesKey'), 10);



		add_action('userpro_social_connect_buttons', array(&$this, 'vk_button'), 9);


	}

	public function loadVK()
	{

		if (userpro_vk_get_option('vk_connect') == 1 && userpro_vk_get_option('vk_api_id') && userpro_vk_get_option('vk_api_secret')) {


			$vk = new VKApiClient();

		}

	}

	/* Get VK button */
	public function vk_button()
	{
		if (userpro_vk_get_option('vk_connect') == 1 && userpro_vk_get_option('vk_api_id') && userpro_vk_get_option('vk_api_secret')) {
			$url = $this->browserUrl();


			?>

            <a href="<?php echo $url ?>" class="userpro-social-vk userpro-tip" title="<?php _e('Login with VK.com', 'userpro-vk'); ?>"></a>

			<?php
		}
	}

	public function browserUrl()
	{

		$oauth = new VKOAuth();
		$display = VKOAuthDisplay::PAGE;
		$scope = array(VKOAuthUserScope::WALL, VKOAuthUserScope::GROUPS);
		$state = 'secret_state_code';

		$browser_url = $oauth->getAuthorizeUrl(VKOAuthResponseType::CODE, $this->client_id, $this->redirect_uri, $display, $scope, $state);


		return $browser_url;

	}

	public function getAccesKey()
	{

		$oauth = new VKOAuth();
        $code = $_GET['code'];

        $response = $oauth->getAccessToken($this->client_id, $this->client_secret, $this->redirect_uri, $code);

        $this->getInfo($response['access_token'], $response['user_id']);


//        $access_token = $response['access_token'];

    }

	public function getInfo($access_token, $user_id)
	{

		$vk = new VKApiClient();
		$response = $vk->users()->get($access_token, array(
			'user_ids' => array($user_id),
			'fields' => array('uid', 'screen_name', 'city', 'first_name','last_name','nickname', 'photo_big','email'),
		));

		if(isset($response)){

		    $uid = isset($response['id']) ? $response['id'] : null;

		    $user = get_users([
			    'meta_key'     => 'userpro_vk_id',
			    'meta_value'   => $uid,
			    'meta_compare' => '='
            ]);

		    if(!empty($user)){
			    userpro_auto_login( $user[0]->user_login, true );
		    }else{
		        $this->register($response);
            }

        }

	}

	public function register($user){

		global $userpro;

		$user_info = [];

        $user_info['id'] = $id = $user[0]['id'];
		$user_info['user_pass'] = wp_generate_password( $length=12, $include_standard_special_chars=false );
		$user_info['first_name'] = $user[0]['first_name'];
        $user_info['last_name'] = $user[0]['last_name'];
        $user_info['nickname'] = $user[0]['nickname'];
        $user_info['screen_name'] = $user[0]['screen_name'];
        $user_info['photo'] = $user[0]['photo_big'];

        $login_name = $user_info['first_name'].'_'.$user_info['last_name'];

        $password = wp_generate_password( $length=12, $include_standard_special_chars=false );



		$user_id = $this->new_user( $login_name, $user_info['user_pass'], '', $user_info, $type='vk' );

		up_error('user ID ', $user_id);

		$this->update_vk_id($user_id,  $user_info['id'] );
		userpro_auto_login( $login_name, true );


    }

	public function new_user($username, $password, $email, $form, $type, $approved=1) {
		global $userpro;

		$user_id = wp_create_user( $username, $password, $email );

		$userpro->default_role($user_id, $form);

//		$this->update_profile_via_vk( $user_id, $form );
//		$this->update_profile_pic_vk( $user_id, $form );

		if ($approved==1){
			userpro_mail($user_id, 'newaccount', $password, $form );
			do_action('userpro_after_new_registration', $user_id);
		}

		return $user_id;
	}

	/* update VK ID */

	public function update_vk_id($user_id, $id){
		update_user_meta($user_id, 'userpro_vk_id', $id);
	}


}

$vk = new VkAuth();