<?php

declare( strict_types=1 );

namespace AcezSeo\Data;

use AcezSeo\Robots\KnownBots;

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

final class RobotsTxtRepository implements RobotsTxtRepositoryInterface
{
	private const OPTION_NAME = 'acez_seo_robots_txt';

	/**
	 * @return array<string, mixed>
	 */
	public function get(): array
	{
		$stored = get_option( self::OPTION_NAME, array() );

		return wp_parse_args( is_array( $stored ) ? $stored : array(), self::defaults() );
	}

	/**
	 * @param array<string, mixed> $settings
	 */
	public function update( array $settings ): bool
	{
		return update_option( self::OPTION_NAME, self::sanitize( wp_parse_args( $settings, self::defaults() ) ) );
	}

	/**
	 * @return array<string, mixed>
	 */
	private static function defaults(): array
	{
		return array(
			'blocked_bots' => array(),
			'custom_rules' => '',
		);
	}

	/**
	 * @param array<string, mixed> $settings
	 *
	 * @return array<string, mixed>
	 */
	private static function sanitize( array $settings ): array
	{
		$known_agents = wp_list_pluck( KnownBots::all(), 'agent' );
		$blocked      = array();

		foreach ( (array) $settings['blocked_bots'] as $agent )
		{
			$agent = sanitize_text_field( (string) $agent );

			if ( in_array( $agent, $known_agents, true ) )
			{
				$blocked[] = $agent;
			}
		}

		return array(
			'blocked_bots' => array_values( array_unique( $blocked ) ),
			// NOT sanitize_textarea_field — robots.txt paths are legitimately
			// percent-encoded ("Disallow: /szukaj?q=%ab") and core would strip those
			// octets silently (M49). TemplateSanitizer keeps them, still strips tags.
			'custom_rules' => \AcezSeo\Support\TemplateSanitizer::sanitize_multiline( $settings['custom_rules'] ),
		);
	}
}