<?php
namespace Bookzenix;

defined( 'ABSPATH' ) || exit;

/**
 * Main bootstrap. Wires every module together.
 */
final class Plugin {

	/** @var Plugin|null */
	private static $instance = null;

	public static function instance() {
		if ( null === self::$instance ) {
			self::$instance = new self();
		}
		return self::$instance;
	}

	private function __construct() {

		Installer::maybe_upgrade();

		( new Rest() )->register();
		( new Admin() )->register();
		( new Frontend() )->register();
		( new Notifications() )->register();
		( new Privacy() )->register();
		( new I18n() )->register();

		// Any change to bookings invalidates the cached "available dates".
		foreach ( array( 'bookzenix_appointment_created', 'bookzenix_appointment_status_changed', 'bookzenix_appointment_rescheduled' ) as $hook ) {
			add_action( $hook, array( __CLASS__, 'bump_availability_cache' ) );
		}
	}

	public static function bump_availability_cache() {
		update_option( 'bookzenix_avail_ver', (int) get_option( 'bookzenix_avail_ver', 0 ) + 1, false );
	}

	/** Table name helper: Plugin::table('appointments') => wp_bookzenix_appointments */
	public static function table( $name ) {
		global $wpdb;
		return $wpdb->prefix . 'bookzenix_' . $name;
	}
}