<?php

namespace App\Console\Commands;

use App\Models\Article;
use App\Models\ArticleCategory;
use Illuminate\Console\Command;
use Illuminate\Support\Facades\DB;

class ReclassifyDocumentContent extends Command
{
    protected $signature = 'articles:reclassify-document-content {--dry-run : Preview changes without writing to database}';

    protected $description = 'Reclassify document-type articles into real documents vs story/blog content';

    /**
     * Keep as document resources.
     *
     * @var array<int, string>
     */
    private array $keepDocumentSlugs = [
        'whisper-colab',
        'document-ef6231ce',
        'document-d34b35ab',
    ];

    /**
     * Move from document to blog/story.
     *
     * @var array<int, string>
     */
    private array $moveToStorySlugs = [
        'document-b81734e3',
        'document-2f8fad62',
        'document-25e793fb',
        'document-48ec7f25',
        'document-f68da0b8',
        'document-a8bdf6d9',
        'document-694e4dd6',
        'document-d0608b86',
        'document-163bc74d',
        'document-ef370202',
    ];

    public function handle(): int
    {
        $dryRun = (bool) $this->option('dry-run');

        $allSlugs = array_values(array_unique(array_merge($this->keepDocumentSlugs, $this->moveToStorySlugs)));
        $articles = Article::query()
            ->whereIn('slug', $allSlugs)
            ->get()
            ->keyBy('slug');

        $missingSlugs = array_values(array_diff($allSlugs, $articles->keys()->all()));

        $documentCategory = ArticleCategory::firstOrCreate(
            ['slug' => 'document'],
            ['name' => '協會文件', 'sort_order' => 20]
        );

        $storyCategory = ArticleCategory::firstOrCreate(
            ['slug' => 'story'],
            ['name' => '故事', 'sort_order' => 30]
        );

        $this->newLine();
        $this->info('Reclassification plan');
        $this->line('  Keep as document: '.count($this->keepDocumentSlugs));
        $this->line('  Move to story/blog: '.count($this->moveToStorySlugs));
        $this->line('  Found in DB: '.$articles->count());

        if (! empty($missingSlugs)) {
            $this->warn('Missing slugs in DB: '.implode(', ', $missingSlugs));
        }

        $this->newLine();
        $this->table(
            ['Slug', 'Current Type', 'Target Type', 'Target Category'],
            collect($allSlugs)->map(function (string $slug) use ($articles) {
                $article = $articles->get($slug);
                $targetIsDocument = in_array($slug, $this->keepDocumentSlugs, true);

                return [
                    $slug,
                    $article?->content_type ?? '(missing)',
                    $targetIsDocument ? Article::CONTENT_TYPE_DOCUMENT : Article::CONTENT_TYPE_BLOG,
                    $targetIsDocument ? 'document' : 'story',
                ];
            })->all()
        );

        if ($dryRun) {
            $this->newLine();
            $this->comment('Dry run only. No database updates were applied.');

            return static::SUCCESS;
        }

        DB::transaction(function () use ($articles, $documentCategory, $storyCategory): void {
            foreach ($this->keepDocumentSlugs as $slug) {
                $article = $articles->get($slug);
                if (! $article) {
                    continue;
                }

                $article->update(['content_type' => Article::CONTENT_TYPE_DOCUMENT]);
                $article->categories()->sync([$documentCategory->id]);
            }

            foreach ($this->moveToStorySlugs as $slug) {
                $article = $articles->get($slug);
                if (! $article) {
                    continue;
                }

                $article->update(['content_type' => Article::CONTENT_TYPE_BLOG]);
                $article->categories()->sync([$storyCategory->id]);
            }
        });

        $revalidated = 0;
        $revalidateServiceClass = '\\App\\Services\\SiteRevalidationService';
        $canRevalidate = class_exists($revalidateServiceClass);

        if (! $canRevalidate) {
            $this->warn('SiteRevalidationService not found. Skipping cache revalidation.');
        }

        foreach ($articles as $article) {
            if (! $article->isPublished() || ! $canRevalidate) {
                continue;
            }

            $revalidateServiceClass::revalidateArticle($article->slug);
            $revalidated++;
        }

        $this->newLine();
        $this->info('Reclassification completed.');
        $this->line('  Updated articles: '.$articles->count());
        $this->line('  Revalidation requests sent: '.$revalidated);

        return static::SUCCESS;
    }
}