<?php

namespace App\Console\Commands;

use App\Jobs\ReindexDocumentJob;
use App\Jobs\ReindexKnowledgeItemJob;
use App\Models\Category;
use App\Models\DocumentVersion;
use App\Models\KnowledgeItem;
use App\Services\KnowledgeBase\AuditService;
use Illuminate\Console\Command;

/**
 * php artisan kb:reindex-category {--category_id=} {--slug=} {--dry-run}
 *
 * Contoh:
 *   php artisan kb:reindex-category --category_id=1
 *   php artisan kb:reindex-category --slug=pelesenan
 *   php artisan kb:reindex-category --slug=pelesenan --dry-run
 */
class ReindexCategoryCommand extends Command
{
    protected $signature = 'kb:reindex-category
                            {--category_id= : ID kategori}
                            {--slug=         : Slug kategori}
                            {--dry-run       : Papar sahaja tanpa dispatch}';

    protected $description = 'Reindex semua dokumen dan knowledge items dalam satu kategori';

    public function handle(AuditService $auditService): int
    {
        $category = null;

        if ($id = $this->option('category_id')) {
            $category = Category::find((int) $id);
        } elseif ($slug = $this->option('slug')) {
            $category = Category::where('slug', $slug)->first();
        }

        if (!$category) {
            $this->error('Kategori tidak dijumpai.');
            $this->listCategories();
            return self::FAILURE;
        }

        $dryRun = $this->option('dry-run');

        $this->info("Kategori: {$category->name}");
        $this->line(str_repeat('─', 50));

        // Dokumen
        $versions = DocumentVersion::whereHas('document', fn($q) => $q->where('category_id', $category->id))
            ->where('is_current', true)
            ->where('processing_status', DocumentVersion::STATUS_INDEXED)
            ->with('document')
            ->get();

        $this->info("Dokumen (versi semasa): {$versions->count()}");
        foreach ($versions as $v) {
            $this->line("  → {$v->document->title} v{$v->version_number}");
            if (!$dryRun) {
                ReindexDocumentJob::dispatch($v->id);
            }
        }

        // Knowledge Items
        $items = KnowledgeItem::where('category_id', $category->id)
            ->where('is_active', true)
            ->get();

        $this->info("\nKnowledge Items: {$items->count()}");
        foreach ($items as $item) {
            $this->line("  → [{$item->item_type}] {$item->title}");
            if (!$dryRun) {
                ReindexKnowledgeItemJob::dispatch($item->id);
            }
        }

        if ($dryRun) {
            $this->warn("\n[DRY RUN] Tiada job dihantar. Buang --dry-run untuk reindex sebenar.");
        } else {
            $auditService->systemReindexStarted("category:{$category->slug}");
            $this->info("\n✓ Semua job telah dijadualkan.");
        }

        return self::SUCCESS;
    }

    private function listCategories(): void
    {
        $this->info("\nKategori tersedia:");
        Category::orderBy('name')->get()->each(function ($c) {
            $this->line("  ID: {$c->id}  Slug: {$c->slug}  Nama: {$c->name}");
        });
    }
}