<?php
// SPDX-License-Identifier: GPL-3.0-or-later
declare(strict_types=1);

namespace Aiwend\Knowledge;

use Aiwend\Support\OptionStore;

/** The administrator's pause intent for a build, kept apart from the builder's own state so no step can overwrite it. Per site (options are per site). */
final class GenerationControl
{
    public const OPTION = 'aiwend_index_control';

    public function __construct(private OptionStore $options)
    {
    }

    public function isPaused(int $siteId, int $generationId): bool
    {
        $c = $this->options->get(self::OPTION, []);
        return $generationId > 0 && is_array($c) && (int) ($c['site_id'] ?? 0) === $siteId && (int) ($c['paused_generation'] ?? 0) === $generationId;
    }

    public const AUTO_OPTION = 'aiwend_index_autosync';

    /**
     * The administrator's standing approval to spend the embedding budget on keeping an index current after source changes. Off by
     * default and per site: without it a source change only marks the index as out of date, and the administrator updates it by hand.
     */
    public function autoSync(int $siteId): bool
    {
        $c = $this->options->get(self::AUTO_OPTION, []);
        return is_array($c) && (int) ($c['site_id'] ?? 0) === $siteId && ($c['enabled'] ?? false) === true;
    }

    public function setAutoSync(int $siteId, bool $enabled): void
    {
        $this->options->set(self::AUTO_OPTION, ['site_id' => $siteId, 'enabled' => $enabled]);
    }

    /** 0 clears the pause. */
    public function setPaused(int $siteId, int $generationId): void
    {
        $this->options->set(self::OPTION, ['site_id' => $siteId, 'paused_generation' => $generationId]);
    }
}