<?php
/**
 * Core plugin class: wires settings, front end, REST API and admin.
 *
 * @package Ajax_loading
 * @since   0.1
 */

defined( 'ABSPATH' ) || exit;

/**
 * Plugin bootstrapper.
 *
 * Kept constructible without arguments and with run() for compatibility with
 * 1.x code that referenced `WP_Ajax_loading_Core` (class alias below).
 */
class WPAJXL_Core {

	/**
	 * The unique identifier of this plugin.
	 *
	 * @var string
	 */
	protected $plugin_name;

	/**
	 * The current version of the plugin.
	 *
	 * @var string
	 */
	protected $version;

	/**
	 * Whether hooks were already registered in this request.
	 *
	 * @var bool
	 */
	private static $running = false;

	/**
	 * Constructor.
	 */
	public function __construct() {
		$this->plugin_name = WPAJXL_PLUGIN_IDENTIFIER;
		$this->version     = WPAJXL_PLUGIN_VERSION;
	}

	/**
	 * Registers every hook of the plugin (once per request).
	 *
	 * @return void
	 */
	public function run() {
		if ( self::$running ) {
			return;
		}
		self::$running = true;

		$settings = WPAJXL_Settings::instance();
		$settings->register_hooks();

		if ( did_action( 'plugins_loaded' ) ) {
			$settings->maybe_upgrade();
		} else {
			add_action( 'plugins_loaded', array( $settings, 'maybe_upgrade' ), 5 );
		}

		( new WPAJXL_Frontend( $settings ) )->register();
		( new WPAJXL_REST( $settings ) )->register();

		if ( is_admin() && class_exists( 'WPAJXL_Admin', false ) ) {
			( new WPAJXL_Admin( $this->plugin_name, $this->version ) )->register();
		}
	}

	/**
	 * Activation hook: migrates 1.x data, creates defaults when no settings
	 * exist and records the version.
	 *
	 * Network activation prepares the current site; every other site is
	 * prepared by maybe_upgrade() on its first request.
	 *
	 * @param bool $network_wide Whether the plugin is network activated.
	 * @return void
	 */
	public static function activate( $network_wide = false ) {
		unset( $network_wide );
		WPAJXL_Settings::instance()->activate();
	}

	/**
	 * Returns the plugin identifier.
	 *
	 * @return string
	 */
	public function get_plugin_name() {
		return $this->plugin_name;
	}

	/**
	 * Returns the plugin version.
	 *
	 * @return string
	 */
	public function get_version() {
		return $this->version;
	}
}

if ( ! class_exists( 'WP_Ajax_loading_Core', false ) ) {
	class_alias( 'WPAJXL_Core', 'WP_Ajax_loading_Core' );
}