<?php

declare(strict_types=1);

namespace LinkCheckup\Features\Checking;

use LinkCheckup\Shared\Links\LinkLookup;

use LinkCheckup\Shared\Links\LinkDetailPresenter;
use WP_Error;

use function is_numeric;

final class RecheckHandler {

	private const NOT_FOUND_CODE   = 'link_not_found';
	private const NOT_FOUND_STATUS = 404;
	private const MISSING_LINK_ID  = 0;

	public function __construct(
		private LinkLookup $link_lookup,
		private LinkChecker $link_checker,
		private LinkDetailPresenter $link_detail_presenter
	) {
	}

	/** @return array<string, mixed>|WP_Error */
	public function recheck( mixed $requested_id ): array|WP_Error {
		$link_id = is_numeric( $requested_id )
			? (int) $requested_id
			: self::MISSING_LINK_ID;
		$link    = $this->link_lookup->find( $link_id );

		if ( null === $link ) {
			return $this->not_found();
		}

		$this->link_checker->check( $link );

		return $this->present_current( $link_id );
	}

	/** @return array<string, mixed>|WP_Error */
	private function present_current( int $link_id ): array|WP_Error {
		$checked_link = $this->link_lookup->find( $link_id );

		if ( null === $checked_link ) {
			return $this->not_found();
		}

		return $this->link_detail_presenter->present( $checked_link );
	}

	private function not_found(): WP_Error {
		return new WP_Error(
			self::NOT_FOUND_CODE,
			__( 'This link does not exist any more.', 'aiplaz-link-checkup' ),
			array( 'status' => self::NOT_FOUND_STATUS )
		);
	}
}