<?php

namespace Modules\Core\Command;

use Illuminate\Console\Command;
use Lunar\Models\ProductVariant;
use Modules\Core\Catalog\Services\SkuBackfillService;

/**
 * CLI wrapper (--dry-run, a progress bar) around Catalog\Services\
 * SkuBackfillService — see that class's own docblock for the actual
 * backfill logic, also called automatically after a Shopify import (see
 * MigrateImport\Jobs\RunMigrateImportJob).
 */
class BackfillMissingSkusCommand extends Command
{
    protected $signature = 'boboko:catalog:backfill-skus {--dry-run : List what would change without writing}';

    protected $description = 'Generate a SKU for every product variant that is missing one';

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

        $total = ProductVariant::query()->whereNull('sku')->count();

        if ($total === 0) {
            $this->info('No variants are missing a SKU.');

            return;
        }

        $this->info(($dryRun ? '[dry-run] ' : '') . "Backfilling SKUs for {$total} variant(s)...");

        $bar = $this->output->createProgressBar($total);
        $bar->start();

        $backfill->backfill($dryRun, function (ProductVariant $variant, string $sku) use ($dryRun, $bar) {
            if ($dryRun) {
                $this->newLine();
                $this->line("Variant {$variant->id}: sku => {$sku}");
            }

            $bar->advance();
        });

        $bar->finish();
        $this->newLine();
        $this->info($dryRun ? 'Dry run complete — no changes were written.' : 'Done.');
    }
}