<?php
/**
 * Main plugin class.
 *
 * @package ReplyPing
 */

namespace PlugWren\ReplyPing;

if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

require_once __DIR__ . '/class-db.php';
require_once __DIR__ . '/class-settings.php';
require_once __DIR__ . '/class-mailer.php';
require_once __DIR__ . '/class-form.php';
require_once __DIR__ . '/class-notifier.php';
require_once __DIR__ . '/class-unsubscribe.php';
require_once __DIR__ . '/class-privacy.php';

/**
 * Bootstraps hooks.
 */
final class Plugin {

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

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

	/**
	 * Register hooks.
	 */
	private function __construct() {
		Db::maybe_upgrade();

		add_action( Db::PURGE_HOOK, array( 'PlugWren\ReplyPing\Db', 'purge_pending' ) );
		if ( ! wp_next_scheduled( Db::PURGE_HOOK ) ) {
			wp_schedule_event( time() + HOUR_IN_SECONDS, 'daily', Db::PURGE_HOOK );
		}

		new Form();
		new Notifier();
		new Unsubscribe();
		new Privacy();

		if ( is_admin() ) {
			new Settings();
		}
	}

	/**
	 * Activation (per site; loops sites on network activation).
	 *
	 * @param bool $network_wide Whether network-activated.
	 */
	public static function activate( $network_wide = false ) {
		if ( is_multisite() && $network_wide ) {
			foreach ( get_sites( array( 'fields' => 'ids', 'number' => 0 ) ) as $blog_id ) {
				switch_to_blog( (int) $blog_id );
				self::activate_site();
				restore_current_blog();
			}
			return;
		}
		self::activate_site();
	}

	/**
	 * Set up the current site.
	 */
	private static function activate_site() {
		Db::install();
		add_option( 'replyping_version', REPLYPING_VERSION );
		add_option( Settings::OPTION, Settings::defaults() );
		if ( ! wp_next_scheduled( Db::PURGE_HOOK ) ) {
			wp_schedule_event( time() + HOUR_IN_SECONDS, 'daily', Db::PURGE_HOOK );
		}
	}

	/**
	 * Deactivation.
	 */
	public static function deactivate() {
		wp_clear_scheduled_hook( Db::PURGE_HOOK );
	}
}