if ( ! function_exists( 'kleo_fb_intialize' ) ) {

	function kleo_fb_intialize() {

		/* If not our action, bail out */
		if ( ! isset( $_POST['action'] ) || ( isset( $_POST['action'] ) && $_POST['action'] != 'fb_intialize' ) ) {
			return false;
		}

		@error_reporting( 0 ); // Don't break the JSON result
		header( 'Content-type: application/json' );

		if ( is_user_logged_in() ) {
			die( wp_json_encode( array( 'error' => esc_html__( 'You are already logged in.', 'kleo' ) ) ) );
		}

		if ( ! isset( $_REQUEST['FB_response'] ) || ! isset( $_REQUEST['FB_userdata'] ) ) {
			die( wp_json_encode( array( 'error' => esc_html__( 'Authentication required.', 'kleo' ) ) ) );
		}

		$FB_response = $_REQUEST['FB_response'];
		$FB_userdata = $_REQUEST['FB_userdata'];
		$FB_userid   = $FB_userdata['id'];


		if ( ! $FB_userid ) {
			die( wp_json_encode( array( 'error' => esc_html__( 'Please connect your facebook account.', 'kleo' ) ) ) );
		}

		global $wpdb;
		//check if we already have matched our facebook account
		$user_ID = $wpdb->get_var( "SELECT user_id FROM $wpdb->usermeta WHERE meta_key = '_fbid' AND meta_value = '$FB_userid'" );

		$redirect      = '';
		$redirect_type = 'redirect';

		//if facebook is not connected
		if ( ! $user_ID ) {
			$user_email = $FB_userdata['email'];
			$user_ID    = $wpdb->get_var( "SELECT ID FROM $wpdb->users WHERE user_email = '" . $wpdb->escape( $user_email ) . "'" );

			//Register user
			if ( ! $user_ID ) {
				if ( ! get_option( 'users_can_register' ) ) {
					die( wp_json_encode( array( 'error' => esc_html__( 'Registration is not open at this time. Please come back later.', 'kleo' ) ) ) );
				}
				if ( sq_option( 'facebook_register', 0 ) == 0 ) {
					die( wp_json_encode( array( 'error' => esc_html__( 'Registration using Facebook is not currently allowed. Please use our Register page', 'kleo' ) ) ) );
				}

				extract( $FB_userdata );

				$display_name = $name;

				$first_name = '';
				$last_name  = '';
				$name_array = explode( ' ', $name, 2 );
				$first_name = $name_array[0];
				if ( isset( $name_array[1] ) ) {
					$last_name = $name_array[1];
				}

				$user_email = $email;
				if ( empty( $user_email ) ) {
					die( wp_json_encode( array( 'error' => esc_html__( 'Please click again to login with Facebook and allow the application to use your email address', 'kleo' ) ) ) );
				}

				if ( empty( $name ) ) {
					die( wp_json_encode( array(
						'error' => 'empty_name',
						esc_html__( 'We didn\'t find your name. Please complete your facebook account before proceeding.', 'kleo' )
					) ) );
				}

				$user_login = sanitize_title_with_dashes( sanitize_user( $display_name, true ) );

				if ( username_exists( $user_login ) ) {
					$user_login = $user_login . time();
				}

				$user_pass = wp_generate_password( 12, false );
				$userdata  = compact( 'user_login', 'user_email', 'user_pass', 'display_name', 'first_name', 'last_name' );
				$userdata  = apply_filters( 'kleo_fb_register_data', $userdata );

				$user_ID = wp_insert_user( $userdata );
				if ( is_wp_error( $user_ID ) ) {
					die( wp_json_encode( array( 'error' => $user_ID->get_error_message() ) ) );
				}

				if ( sq_option( 'facebook_sent_email_login_details', '1' ) == '1' ) {
					//send email with password
					wp_new_user_notification( $user_ID, wp_unslash( $user_pass ) );
				}
				//add Facebook image
				update_user_meta( $user_ID, 'kleo_fb_picture', 'https://graph.facebook.com/' . $id . '/picture' );

				do_action( 'fb_register_action', $user_ID );
				do_action( 'user_register', $user_ID );

				update_user_meta( $user_ID, '_fbid', $id );

				$logintype = 'register';

				/* Registration logic redirect */
				if ( function_exists( 'bp_is_active' ) && sq_option( 'facebook_register_redirect', 'default' ) == 'default' ) {
					$redirect_url = bp_core_get_user_domain( $user_ID ) . 'profile/edit/group/4/?fb=registered';
				} elseif ( sq_option( 'facebook_register_redirect', 'default' ) == 'reload' ) {
					$redirect_type = 'reload';
					$redirect_url  = home_url();
				} elseif ( sq_option( 'facebook_register_redirect', 'default' ) == 'custom' ) {
					$redirect_url = sq_option( 'facebook_register_redirect_url', '' );
					if ( function_exists( 'bp_is_active' ) ) {
						$logged_in_link = bp_core_get_user_domain( $user_ID );
						$redirect_url   = str_replace( '##profile_link##', $logged_in_link, $redirect_url );
					}
				}

				if ( ! isset( $redirect_url ) || empty( $redirect_url ) ) {
					$redirect_type = 'reload';
					$redirect_url  = home_url();
				}

				$redirect = apply_filters( 'kleo_fb_register_redirect', $redirect_url, $user_ID );
			} else {
				update_user_meta( $user_ID, '_fbid', $FB_userdata['id'] );
				//add Facebook image
				update_user_meta( $user_ID, 'kleo_fb_picture', 'https://graph.facebook.com/' . $FB_userdata['id'] . '/picture' );
				$logintype = 'login';
			}
		} else {
			$logintype = 'login';
		}

		$user = get_user_by( 'id', $user_ID );

		if ( $logintype == 'login' ) {

			$redirect_to = home_url();
			if ( function_exists( 'bp_is_active' ) ) {
				$redirect_to = bp_core_get_user_domain( $user_ID );
			}

			/* Check the configured type of redirect */
			if ( sq_option( 'login_redirect' ) == 'reload' ) {
				$redirect_type = 'reload';
			}

			/**
			 * Filter the login redirect URL.
			 *
			 * @since 3.0.0
			 *
			 * @param string $redirect_to The redirect destination URL.
			 * @param string $requested_redirect_to The requested redirect destination URL passed as a parameter.
			 * @param WP_User|WP_Error $user WP_User object if login was successful, WP_Error object otherwise.
			 */

			$redirect = apply_filters( 'login_redirect', $redirect_to, '', $user );
		}

		wp_set_auth_cookie( $user_ID, false, false );
		/**
		 * Fires after the user has successfully logged in.
		 *
		 * @since 1.5.0
		 *
		 * @param string $user_login Username.
		 * @param WP_User $user WP_User object of the logged-in user.
		 */
		do_action( 'wp_login', $user->user_login, $user );

		die ( wp_json_encode( array(
			'loggedin'     => true,
			'type'         => $logintype,
			'url'          => $redirect,
			'redirectType' => $redirect_type,
			'message'      => esc_html__( 'Login successful, redirecting...', 'kleo' ),
		) ) );

		//Update the user after creation
        wp_update_user( array(
            'ID' => (int) $user_ID,
        ) );


	}
}

if ( ! is_admin() ) {
	add_action( 'init', 'kleo_fb_intialize' );
}