<?php

use App\Models\Product;
use Illuminate\Support\Facades\Artisan;
use Illuminate\Support\Facades\Http;
use Illuminate\Support\Facades\Storage;
use Illuminate\Support\Str;

Artisan::command('products:generate-thumbnails {--force : Regenerate even if thumbnail_path already exists}', function (): int {
    $disk = Storage::disk('images');
    $directory = 'products/thumbnails';
    $openAiApiKey = (string) config('services.openai.api_key', '');

    if ($openAiApiKey === '') {
        $this->error('Missing OpenAI API key. Set OPENAI_API_KEY in your environment.');

        return self::FAILURE;
    }

    $categoryLabels = [
        'computers-laptop' => 'laptop computer',
        'computers-server' => 'rack server hardware',
        'components-motherboard' => 'computer motherboard',
        'components-graphicscard' => 'graphics card',
        'components-memory' => 'RAM memory sticks',
        'components-harddrives-ssd' => 'NVMe SSD drive',
        'components-harddrives-mechanical' => 'mechanical hard disk drive',
        'accessories-keyboard' => 'computer keyboard',
        'accessories-mouse' => 'computer mouse',
        'accessories-streaming' => 'streaming equipment',
        'accessories-bags' => 'laptop backpack',
        'monitor-gaming-monitors' => 'gaming monitor',
        'monitor-mounting' => 'monitor arm mount',
        'monitor-accessories' => 'monitor desk accessory',
        'components-soundcard' => 'USB audio interface',
        'components-tools' => 'PC repair tools',
    ];

    $products = Product::query()
        ->with('category:id,slug')
        ->get();

    $updated = 0;
    $skipped = 0;
    $failed = 0;

    foreach ($products as $product) {
        $categorySlug = $product->category?->slug;

        if (! is_string($categorySlug) || ! isset($categoryLabels[$categorySlug])) {
            $failed++;
            $this->warn("No category image mapping for product #{$product->id} ({$product->sku})");
            continue;
        }

        $filename = Str::slug($product->sku).'.jpg';
        $path = $directory.'/'.$filename;

        if (! $this->option('force') && is_string($product->thumbnail_path) && $product->thumbnail_path !== '' && $disk->exists($product->thumbnail_path)) {
            $skipped++;
            continue;
        }

        $prompt = sprintf(
            'Photorealistic product photo of %s for an ecommerce thumbnail. Product: %s. Clean studio lighting, centered subject, neutral background, no text, no logos, no watermark.',
            $categoryLabels[$categorySlug],
            $product->name,
        );

        /** @var \Illuminate\Http\Client\Response $response */
        $response = Http::timeout(120)
            ->withToken($openAiApiKey)
            ->post('https://api.openai.com/v1/images/generations', [
                'model' => 'gpt-image-1',
                'prompt' => $prompt,
                'size' => '1024x1024',
            ]);

        if (! $response->successful()) {
            $failed++;
            $error = $response->json('error.message');
            $status = $response->status();
            $message = is_string($error) && $error !== '' ? $error : $response->body();
            $this->error("Image generation failed for {$product->sku} ({$categorySlug}) [HTTP {$status}]: {$message}");
            continue;
        }

        $payload = $response->json();
        $encodedImage = is_array($payload)
            ? data_get($payload, 'data.0.b64_json')
            : null;

        if (! is_string($encodedImage) || $encodedImage === '') {
            $failed++;
            $this->error("Image payload missing for {$product->sku}");
            continue;
        }

        $binaryImage = base64_decode($encodedImage, true);

        if (! is_string($binaryImage) || $binaryImage === '') {
            $failed++;
            $this->error("Image decode failed for {$product->sku}");
            continue;
        }

        $disk->put($path, $binaryImage);
        $product->thumbnail_path = $path;
        $product->save();
        $updated++;
    }

    $this->info("Completed: updated={$updated}, skipped={$skipped}, failed={$failed}");

    return self::SUCCESS;
})->purpose('Generate category-based product thumbnails into image storage');