<?php

namespace App\Console\Commands;

use Illuminate\Console\Command;
use App\Models\Media;
use App\Models\Page;
use Illuminate\Support\Facades\File;
use Illuminate\Support\Facades\Storage;

class OrphanedMediaWatcher extends Command
{
    /**
     * The name and signature of the console command.
     *
     * @var string
     */
    protected $signature = 'sw:media:cleanup {--dry-run}';

    /**
     * The console command description.
     *
     * @var string
     */
    protected $description = 'Cleanup unreferenced media files and JIT caches.';

    /**
     * Execute the console command.
     */
    public function handle()
    {
        $this->info('Starting Orphaned Media Watcher...');
        $dryRun = $this->option('dry-run');

        // 1. Cleanup JIT cache (safe to delete anytime)
        $cachePath = storage_path('app/public/media/cache');
        if (is_dir($cachePath)) {
            $this->info('Cleaning up JIT cache...');
            if ($dryRun) {
                $this->info('Dry-run: Would delete directory ' . $cachePath);
            } else {
                File::deleteDirectory($cachePath);
                mkdir($cachePath, 0755, true);
            }
        }

        // 2. Identification of orphaned originals
        $this->info('Scanning for orphaned media files in database...');

        $mediaRecords = Media::all();
        $referencedMediaIds = $this->getReferencedMediaIds();

        $orphansCount = 0;

        foreach ($mediaRecords as $media) {
            if (!in_array($media->id, $referencedMediaIds)) {
                $orphansCount++;
                $this->warn("Orphaned media found: ID {$media->id}, Filename: {$media->filename}");

                if ($dryRun) {
                    $this->info("Dry-run: Would delete media ID {$media->id} and file {$media->path}");
                } else {
                    Storage::disk('public')->delete($media->path);
                    $media->delete();
                    $this->info("Deleted media ID {$media->id}");
                }
            }
        }

        if ($orphansCount === 0) {
            $this->info("\nNo orphaned media files found.");
        } else {
            $this->info("\nProcessed {$orphansCount} orphaned media files.");
        }

        $this->info('Media cleanup completed.');
        return 0;
    }

    /**
     * Scans all pages for media IDs.
     */
    protected function getReferencedMediaIds(): array
    {
        $ids = [];
        $pages = Page::all();

        foreach ($pages as $page) {
            $content = $page->content; // Array due to cast
            if (is_array($content)) {
                $ids = array_merge($ids, $this->scanBlocksForMediaIds($content));
            }
        }

        return array_unique($ids);
    }

    /**
     * Recursively scan blocks for media IDs.
     */
    protected function scanBlocksForMediaIds(array $blocks): array
    {
        $ids = [];
        foreach ($blocks as $block) {
            if (isset($block['type']) && $block['type'] === 'media' && isset($block['media_id'])) {
                $ids[] = (int) $block['media_id'];
            }

            // In case of nested blocks in the future
            if (isset($block['children']) && is_array($block['children'])) {
                $ids = array_merge($ids, $this->scanBlocksForMediaIds($block['children']));
            }
        }
        return $ids;
    }
}