class GoogleReviews {


	/**
	 * Get Google reviews.
	 *
	 * @access public
	 * @since 1.0.0
	 *
	 * @param array|string $atts shortcode attributes
	 *
	 * @return array {
	 *       Reviews.
	 *  @type array reviewer {
	 *             Reviewer.
	 *      @type string 'name' The person's full name
	 *      @type string 'link' The link of reviews page
	 *      @type string 'image' The person's profile picture url
	 *      @type string 'rating' Rating
	 *      @type string 'text' Review text included in the review
	 *      @type string 'date' When the reviewer rated this object
	 *  }
	 * }
	 */
	public function get_reviews($atts){

		if(isset(get_option('mortgage_google_widget')['api']) && 'map' === get_option('mortgage_google_widget')['api']){
			$place_id = get_option('mortgage_google_widget')['place_id'] ?? "";
			$api_key = get_option('mortgage_google_widget')['api_key'] ?? "";

			if(empty($place_id) && empty($api_key)) return array();

			$url = 'https://maps.googleapis.com/maps/api/place/details/json?reference='.$place_id.'&key='.$api_key;

			$reviews = $this->request($url,1);
			$reviews = isset($reviews['result']['reviews']) ? $reviews['result']['reviews'] : array();
			$reviews = $this->prepare_reviews($reviews);
			return $reviews;

		} elseif(isset(get_option('mortgage_google_widget')['api']) && 'business' === get_option('mortgage_google_widget')['api']){

		    //@to-do check data from API and add count

            $access_token = json_decode($this->get_access_token(),1)['access_token'];
            $count = isset($atts['count']) && !empty($atts['count']) ? $atts['count'] : (isset(get_option('mortgage_google_widget')['count']) ? get_option('mortgage_google_widget')['count'] : 3);

            $account = $this->get_account_id();
            $location = $this->get_location_id();
            $url = 'https://mybusiness.googleapis.com/v4/accounts/'.$account.'/locations/'.$location.'/reviews';
            $header = array(
                "Authorization" => 'Bearer '.$access_token,
                'content-type'  => 'application/json'
            );
            $reviews = $this->request($url,1, $header);
            $reviews = isset($reviews['reviews']) ? $reviews['reviews'] : array();
            $reviews = $this->prepare_reviews($reviews);

            return $reviews;
		} else {
			return array();
		}
	}

	/**
	 * Request.
	 *
	 * @access protected
	 * @since 1.0.0
	 *
	 * @param string $url URL
	 * @param bool|null $associative [optional] When true, returned objects will be converted into associative arrays.
	 *
	 * @return mixed $response The body of the response. Empty string if no body or incorrect parameter given.
	 */
	protected function request(string $url, $associative = false, $header = '' ){

		$response = get_transient(md5($url));
		if(!$response) {
			$header = ! empty( $header ) ? $header : array( 'Content-Type' => 'application/json' );

			$response = wp_remote_get( $url, array(
					"headers" => $header
				)
			);
			$response = wp_remote_retrieve_body( $response );

			$response = json_decode( $response, $associative );
			set_transient(md5($url), $response, DAY_IN_SECONDS);
		}
		return $response;
	}


	/**
	 * Prepare reviews to display.
	 * @access protected
	 * @since 1.0.0
	 * @see     https://developers.google.com/my-business/reference/rest/v4/accounts.locations.reviews
	 * @param array $reviews {
	 *
	 *                       Array of reviews.
	 *
	 *  @type string 'author_name' The name of the reviewer
	 *  @type string 'author_url' The URL of the reviewer
	 *  @type string 'language' language
	 *  @type string 'profile_photo_url' The reviewer photo URL
	 *  @type int 'rating' The star rating of the review.
	 *  @type string 'relative_time_description' The relative time when the review was written
	 *  @type string 'text' Text of review
	 *  @type int 'time' The timestamp for when the review was written
	 * }
	 *
	 * @return array {
	 *       Reviews.
	 *  @type array reviewer {
	 *             Reviewer.
	 *      @type string 'name' The person's full name
	 *      @type string 'link' The link of reviews page
	 *      @type string 'image' The person's profile picture url
	 *      @type string 'rating' Rating
	 *      @type string 'text' Review text included in the review
	 *      @type string 'date' When the reviewer rated this object
	 *  }
	 * }
	 *
	 */
	protected function prepare_reviews($reviews){

		$google_review = array();

        if(!isset(get_option('mortgage_google_widget')['api'])) return $google_review;

        if('map' === get_option('mortgage_google_widget')['api']){
			foreach ($reviews as $review) {
				$google_review[] = array(
					"name" => sanitize_text_field($review['author_name']),
					"link" => isset(get_option('mortgage_google_widget')['place_id']) ? esc_url_raw('https://search.google.com/local/reviews?placeid='.get_option('mortgage_google_widget')['place_id']) : '',
					"image" => esc_url_raw($review['profile_photo_url']),
					"rating" => sanitize_text_field($review['rating']),
					"text" => sanitize_text_field($review['text']),
					"date" => date_i18n('j F Y H:i:s',sanitize_text_field($review['time'])),
				);
			}
		}
		if('business' === get_option('mortgage_google_widget')['api']){
			foreach ($reviews as $review) {
				$google_review[] = array(
					"name" => sanitize_text_field($review['reviewer']['displayName']),
					"link" => esc_url_raw('https://search.google.com/local/reviews?placeid='.get_option('mortgage_google_widget')['place_id']),
					"image" => esc_url_raw($review['reviewer']['profilePhotoUrl']),
					"rating" => sanitize_text_field($review['starRating']),
					"text" => sanitize_text_field($review['comment']),
					"date" => date_i18n('j F Y H:i:s',sanitize_text_field($review['createTime'])),
				);
			}
		}

		return $google_review;
	}


	/**
	 * Get client ID.
	 *
	 * @access private
	 * @since 1.0.0
	 *
	 * @return mixed client ID
	 */
	private function get_client_id() {

		$client_id = get_option( 'mortgage_google_widget' )['client_id'] ?? '';

		return $client_id;
	}

	/**
	 * Get client secret.
	 *
	 * @access private
	 * @since 1.0.0
	 *
	 * @return mixed client secret
	 */
	private function get_client_secret() {

		$client_secret = get_option( 'mortgage_google_widget' )['client_secret'] ?? '';

		return $client_secret;
	}



	/**
	 * Get refresh token.
	 *
	 * @access private
	 * @since 1.0.0
	 *
	 * @return mixed refresh token
	 */
	private function get_refresh_token() {

		$google_refresh_token = get_option( 'mortgage_google_widget_refresh_token' );

		return $google_refresh_token;
	}


	/**
	 * Get google access token.
	 *
	 * @access private
	 * @since 1.0.0
	 *
	 * @return string|void access token
	 */
	private function get_access_token() {

		$google_access_token = get_option( 'mortgage_google_widget_access_token' );

		return $google_access_token;

	}

    /**
     * Get account ID.
     *
     * @access private
     * @since 1.0.0
     *
     * @return string|void access token
     */
    private function get_account_id() {

        $account_id = get_option( 'mortgage_google_widget' )['account'] ?? '';

        return $account_id;

    }

    /**
     * Get location ID.
     *
     * @access private
     * @since 1.0.0
     *
     * @return string|void access token
     */
    private function get_location_id() {

        $location_id = get_option( 'mortgage_google_widget' )['location'] ?? '';

        return $location_id;

    }


    /**
     * @to-do Check get accounts and display int settings
     * Set My business API accounts.
     *
     * @access public
     * @since 1.0.0
     *
     * @return bool True if the value was updated, false otherwise.
     */
    public function set_accounts(){

        $client = $this->get_client();
        $my_business = new \Google_Service_MyBusinessAccountManagement($client);
        $account_list = false;//$my_business->accounts->listAccounts();

        $accounts = array();
        if($account_list){
            foreach ($account_list as $account){
                $accounts[] = array(
                    $account->name => $account->accountName,
                );
            }
        }


        $google_option = get_option('mortgage_google_widget');
        $google_option['account'] = $accounts;

        return update_option('mortgage_google_widget',$google_option);

    }


    /**
     * @to-do Check get locations and display int settings
     * Set My business API locations.
     *
     * @access public
     * @since 1.0.0
     *
     * @return bool True if the value was updated, false otherwise.
     */
    public function set_locations(){

        $client = $this->get_client();
        $my_business = new \Google_Service_MyBusinessAccountManagement($client);
        $location_list = $my_business->locations;

        $locations = array();
        foreach ($location_list as $location){
            $locations[] = array(
                $location->name => $location->locationName,
            );
        }

        $google_option = get_option('mortgage_google_widget');
        $google_option['location'] = $locations;

        return update_option('mortgage_google_widget',$google_option);
    }


	/**
	 * Set google access token.
	 *
	 * @access private
	 * @since 1.0.0
	 *
	 * @param array $token access token.
	 *
	 * @return string|void access token
	 */
	private function set_access_token( $token ) {

		$token = wp_json_encode($token);

		$google_access_token = update_option( 'mortgage_google_widget_access_token', $token );

		return $google_access_token;

	}


	/**
	 * Callback function revoke token.
	 *
	 * @access public
	 * @since 1.0.0
	 */
	public function revoke_token() {

		$client = $this->get_client();
		$client->revokeToken(get_option('mortgage_google_widget_access_token'));

		update_option( 'mortgage_google_widget_refresh_token', "");
		update_option( 'mortgage_google_widget_access_token', "" );

		wp_die();
	}



	/**
	 * Get redirect URI.
	 *
	 * @access private
	 * @since 1.0.0
	 *
	 * @return string|void redirect uri
	 */
	private function get_redirect_uri() {

		$redirect_url = get_option( 'mortgage_google_widget' )['redirect_uri'] ?? '';


		return $redirect_url;
	}


	/**
	 * Get google client.
	 *
	 * Get refresh token.
	 * Get access token.
	 *
	 * @access public
	 * @since 1.0.0
	 *
	 * @return Google_Client|string
	 */
	public function get_client() {

		$client_id     = $this->get_client_id();
		$client_secert = $this->get_client_secret();
		$redirect_uri  = $this->get_redirect_uri();

		$client = new Google_Client(['api_format_v2' => true]);
        $client->setScopes( "https://www.googleapis.com/auth/plus.business.manage" );
        $client->setScopes( "https://www.googleapis.com/auth/business.manage" );
		$client->setClientId( $client_id );
		$client->setClientSecret( $client_secert );
		$client->setRedirectUri( $redirect_uri );
		$client->setAccessType( 'offline' );
		//$client->setApprovalPrompt( 'force' );

		// Load previously authorized credentials from a file.
		$auth_token = $this->get_refresh_token();

		if ( empty( $auth_token ) ) {
			$auth_url = $client->createAuthUrl();

			return $auth_url;
		}

		$accessToken = $this->get_access_token();

		if ( !empty( $accessToken ) ) {
			$accessToken = json_decode($accessToken, true);
		} else {
			if ( empty( $auth_token ) ) {
				$auth_url = $client->createAuthUrl();
				return $auth_url;
			}
			else{
				$authCode = trim($auth_token);
				// Exchange authorization code for an access token.
				$accessToken = $client->fetchAccessTokenWithAuthCode($authCode);
				// Store the credentials to disk.
				$this->set_access_token($accessToken);
			}
		}

		$client->setAccessToken( $accessToken );
		// Refresh the token if it's expired.
		if ($client->isAccessTokenExpired()) {
			// save refresh token to some variable
			$refreshTokenSaved = $client->getRefreshToken();
			$client->fetchAccessTokenWithRefreshToken($client->getRefreshToken());
			// pass access token to some variable
			$accessTokenUpdated = $client->getAccessToken();
			// append refresh token
			$accessTokenUpdated['refresh_token'] = $refreshTokenSaved;
			//Set the new acces token
			$accessToken = $refreshTokenSaved;
			$this->set_access_token(wp_json_encode( $accessTokenUpdated ));
			$accessToken = json_decode( wp_json_encode( $accessTokenUpdated ), true);
			$client->setAccessToken($accessToken);
		}

		return $client;
	}



	/**
	 * Decode state.
	 * Decodes Data from $state query arg and adds them to $_REQUEST. This must happen
	 * before admin-ajax.php checks for the 'action' value
	 * @access public
	 * @since  1.0.0
	 */
	public function decode_state() {

		if ( ! is_admin() || ! is_user_logged_in() ) {
			return;
		}

		if ( ! isset( $_REQUEST['page'] ) || ! is_string( $_REQUEST['page'] ) ) {
			return;
		}

		if( isset( $_GET['page'] ) && 'mortgage_google_widget' === $_GET['page']) {
			$this->get_refresh_code();
		}

	}


	/**
	 * Get refresh code from GET params.
	 *
	 * @access public
	 * @since 1.0.0
	 *
	 * @return string
	 */
	public function get_refresh_code() {

		$token_value = $this->get_refresh_token();
		$code        = '';
		if ( isset( $_GET['code'] ) && ! empty( $_GET['code'] ) ) {
			$code = sanitize_text_field($_GET['code']);
			update_option('mortgage_google_widget_refresh_token',sanitize_text_field($_GET['code']));
			wp_redirect( get_admin_url() . 'admin.php?page=mortgage_google_widget' );
		}

		$value = $token_value ? $token_value : $code;

		return $value;
	}



}