<?php

declare(strict_types=1);

namespace LinkCheckup\Features\Schedule;

use LinkCheckup\Shared\Time\Clock;

use function is_numeric;

final class JobLock {

	private const OPTION           = 'link_checkup_job_lock';
	private const LIFETIME_SECONDS = 600;

	public function __construct( private readonly Clock $clock ) {
	}

	public function acquire(): bool {
		$now        = $this->clock->now();
		$expires_at = $now + self::LIFETIME_SECONDS;

		if ( add_option( self::OPTION, $expires_at, '', false ) ) {
			return true;
		}

		$held_until = get_option( self::OPTION );

		if ( is_numeric( $held_until ) && (int) $held_until > $now ) {
			return false;
		}

		update_option( self::OPTION, $expires_at, false );

		return true;
	}

	public function release(): void {
		delete_option( self::OPTION );
	}
}