<?php
/**
 * Undoing the enforcement that writes to files, on deactivation.
 *
 * @package AIBlackout
 */

namespace AIBlackout\Enforcement;

defined( 'ABSPATH' ) || exit;

/**
 * Removes the file-based enforcement when the plugin is switched off.
 *
 * @since 1.0.0
 */
class Suspension {

	/**
	 * Option written by 1.0.x, and by nothing since.
	 *
	 * @var string
	 */
	const LEGACY_OPTION = 'aiblackout_suspended_layers';

	/**
	 * The .htaccess layer.
	 *
	 * @var Htaccess
	 */
	private $htaccess;

	/**
	 * The robots.txt layer.
	 *
	 * @var RobotsTxt
	 */
	private $robots;

	/**
	 * Constructor.
	 *
	 * @param Htaccess  $htaccess The .htaccess layer.
	 * @param RobotsTxt $robots   The robots.txt layer.
	 */
	public function __construct( Htaccess $htaccess, RobotsTxt $robots ) {
		$this->htaccess = $htaccess;
		$this->robots   = $robots;
	}

	/**
	 * Registers hooks.
	 *
	 * @return void
	 */
	public function register(): void {
		add_action( 'aiblackout_version_changed', array( $this, 'purge_legacy_record' ) );
	}

	/**
	 * Drops the 1.0.x deactivation record.
	 *
	 * @return void
	 */
	public function purge_legacy_record(): void {
		delete_option( self::LEGACY_OPTION );
	}

	/**
	 * Reverts every file this plugin has written to.
	 *
	 * @return void
	 */
	public function suspend(): void {
		if ( $this->htaccess->is_applied() ) {
			$this->htaccess->revert();
		}

		if ( $this->robots->physical_file_has_block() ) {
			$this->robots->revert_physical_file();
		}
	}
}