<?php

declare(strict_types=1);

namespace LinkCheckup\Features\Checking;

use function in_array;

final class HttpProbe {

	private const FIRST_METHOD         = 'HEAD';
	private const FALLBACK_METHOD      = 'GET';
	private const REFUSED_STATUS_CODES = array( 403, 405, 501 );

	public function __construct(
		private RedirectFollower $redirect_follower,
		private AnswerJudge $answer_judge
	) {
	}

	public function judge( string $url ): Judgement {
		$answer = $this->redirect_follower->follow( self::FIRST_METHOD, $url );

		if ( $this->is_refused( $answer ) ) {
			$answer = $this->redirect_follower->follow(
				self::FALLBACK_METHOD,
				$url
			);
		}

		return $this->answer_judge->judge( $url, $answer );
	}

	private function is_refused( HttpAnswer $answer ): bool {
		return null === $answer->status_code
			|| in_array(
				$answer->status_code,
				self::REFUSED_STATUS_CODES,
				true
			);
	}
}