<?php

namespace App\Services;

use App\Models\Articles;
use App\Models\Categories;
use Illuminate\Http\Exceptions\HttpResponseException;

final class SiteMode
{
    public static function quiet(): bool
    {
        $path = config('site_mode.state_path');
        if (! $path || ! is_file($path)) return (bool) config('site_mode.quiet', false);
        $state = json_decode((string) file_get_contents($path), true);
        // An unreadable/invalid operational flag must not silently resume publishing.
        return ! is_array($state) || ! is_bool($state['quiet'] ?? null) || $state['quiet'];
    }

    public static function assertUpdatesAllowed(?string $type): void
    {
        if ($type !== 'freenode' || ! self::quiet()) return;
        throw new HttpResponseException(response()->json([
            'isDone' => false, 'status' => 'paused', 'code' => 'FREE_NODE_UPDATES_PAUSED',
            'message' => 'Free node updates are temporarily paused; existing publications are retained.',
        ], 503, ['Retry-After' => '3600']));
    }

    public static function guardArticle(Articles $article): void
    {
        if (! self::quiet()) return;
        $fields = ['sSlug','iCategoryId','sTitle','sTitleSub','sContent','sThumb',
            'iStatus','created_at','sDisplayPublishedAt','sResourceStatus','iResourceCount'];
        if ($article->exists && ! $article->isDirty($fields)) return;
        $ids = array_filter([$article->iCategoryId, $article->getRawOriginal('iCategoryId')]);
        if ($ids && Categories::whereIn('id', $ids)->where('sSlug', 'freenode')->exists()) {
            self::assertUpdatesAllowed('freenode');
        }
    }
}