<?php
/**
 * EquaSign orchestrator: ordered loading of modules and wiring of hooks
 * (REST, signer page, AJAX, admin, purge cron, i18n).
 *
 * @package EquaSign
 */

defined( 'ABSPATH' ) || exit;

/**
 * Delivery-channel resolver (reason codes + channels_status). Loaded here so
 * the class is guaranteed available regardless of the core loading order.
 * require_once is idempotent: harmless if the core loader also lists it.
 */
require_once EQUASIGN_DIR . 'includes/class-equasign-channels.php';

final class EquaSign_Plugin {

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

	/**
	 * Singleton.
	 *
	 * @return EquaSign_Plugin
	 */
	public static function instance() {
		if ( null === self::$instance ) {
			self::$instance = new self();
		}
		return self::$instance;
	}

	/**
	 * Constructor: wires the hooks. The core is already loaded upstream by
	 * equasign_load_core() (see equasign.php), so it is available everywhere.
	 */
	private function __construct() {
		$this->hooks();
	}

	/**
	 * Wires the WordPress hooks.
	 *
	 * @return void
	 */
	private function hooks() {
		// Admin classes: loaded only in an administration context.
		if ( is_admin() ) {
			require_once EQUASIGN_DIR . 'admin/class-equasign-admin-client.php';
			require_once EQUASIGN_DIR . 'admin/class-equasign-admin.php';
		}


		// Schema upgrade if needed.
		add_action( 'init', array( 'EquaSign_Installer', 'upgrade_if_needed' ) );

		// Signer page (rewrite + render).
		add_action( 'init', array( 'EquaSign_Signer_Page', 'register_rules' ) );
		add_filter( 'query_vars', array( 'EquaSign_Signer_Page', 'add_query_vars' ) );
		add_action( 'template_redirect', array( 'EquaSign_Signer_Page', 'maybe_render' ) );

		// REST.
		add_action( 'rest_api_init', array( 'EquaSign_Rest_Controller', 'register_routes' ) );

		// Signer page AJAX (unauthenticated: nopriv + priv for testing).
		$actions = array(
			'equasign_otp_send'       => array( 'EquaSign_Signer_Actions', 'send_otp' ),
			'equasign_seal'           => array( 'EquaSign_Signer_Actions', 'seal' ),
			'equasign_decline'        => array( 'EquaSign_Signer_Actions', 'decline' ),
			'equasign_doc'            => array( 'EquaSign_Signer_Actions', 'view_document' ),
		);
		foreach ( $actions as $name => $cb ) {
			add_action( 'wp_ajax_nopriv_' . $name, $cb );
			add_action( 'wp_ajax_' . $name, $cb );
		}


		// Purge cron.
		add_action( 'init', array( 'EquaSign_Purge', 'schedule' ) );
		add_action( EquaSign_Purge::HOOK, array( 'EquaSign_Purge', 'run' ) );

		// Admin.
		if ( is_admin() ) {
			EquaSign_Admin::init();
		}
	}
}