<?php
/**
 * Same-host public URL resolver.
 *
 * @package TwoUA_SEO_Release_Guard
 */

declare(strict_types=1);

namespace TwoUA\SeoReleaseGuard;

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

final class UrlResolver {
	public function homepage(): RunUrl {
		return new RunUrl( home_url( '/' ), 'homepage' );
	}

	public function published_post( \WP_Post $post ): ?RunUrl {
		$url = get_permalink( $post );
		if ( ! is_string( $url ) ) {
			return null;
		}

		return $this->same_host( $url, 'product' === $post->post_type ? 'product' : 'content' );
	}

	public function same_host( string $url, string $role ): ?RunUrl {
		$validated = wp_http_validate_url( $url );
		if ( ! is_string( $validated ) || ! $this->matches_home_host( $validated ) ) {
			return null;
		}

		$without_fragment = preg_replace( '/#.*$/', '', $validated );

		return is_string( $without_fragment ) ? new RunUrl( $without_fragment, $role ) : null;
	}

	private function matches_home_host( string $url ): bool {
		$home_host = wp_parse_url( home_url( '/' ), PHP_URL_HOST );
		$url_host  = wp_parse_url( $url, PHP_URL_HOST );

		return is_string( $home_host )
			&& is_string( $url_host )
			&& strtolower( rtrim( $home_host, '.' ) ) === strtolower( rtrim( $url_host, '.' ) );
	}
}