<?php
/**
 * Atlas-Tool: Bild generieren mit DALL-E 3.
 *
 * NUR LOKAL ausführen. API-Key liegt in v2-platform/.env.local.
 *
 * Aufruf:
 *   php image.php --prompt "Scene description" --output path/to/file.png [--resolution 1792x1024] [--quality standard]
 *
 * Der Plattform-Bildstil-Prompt wird automatisch vorangestellt.
 *
 * Status: Skelett — echte OpenAI-Call-Implementierung folgt bei erster
 * Verwendung. Aktuell loggt nur was generiert würde + warnt wenn Key fehlt.
 */

declare(strict_types=1);
require_once __DIR__ . '/../../php/config.php';

// === Args parsen ===
$opts = getopt('', ['prompt:', 'output:', 'resolution::', 'quality::', 'dry-run']);
if (empty($opts['prompt']) || empty($opts['output'])) {
    fwrite(STDERR, "Usage: php image.php --prompt \"...\" --output path.png [--resolution 1792x1024] [--quality standard|hd] [--dry-run]\n");
    exit(1);
}

$prompt = $opts['prompt'];
$output = $opts['output'];
$resolution = $opts['resolution'] ?? '1792x1024';
$quality = $opts['quality'] ?? 'standard';
$dryRun = isset($opts['dry-run']);

// === Bildstil-Prompt voranstellen (Plattform-Standard) ===
$stylePrompt = "Flat Scandinavian illustration, wide panoramic landscape filling the entire 16:9 frame edge-to-edge, painted style with clean vector shapes, dark forest green (#1f4b37) and sage green (#4a7c4e) tones, yellow-mustard (#e8c547) accents, beige (#e8e4d8) buildings and valleys, white highlights. No text, no watermark, no logos, no borders, no frame. — Scene: ";
$fullPrompt = $stylePrompt . $prompt;

echo "[asset-gen/image] Prompt:     $fullPrompt\n";
echo "[asset-gen/image] Auflösung:  $resolution\n";
echo "[asset-gen/image] Quality:    $quality\n";
echo "[asset-gen/image] Output:     $output\n";

// === API-Key prüfen ===
if (empty(V2_OPENAI_KEY)) {
    fwrite(STDERR, "[asset-gen/image] FEHLER: OPENAI_API_KEY nicht gesetzt in v2-platform/.env.local\n");
    exit(2);
}

if ($dryRun) {
    echo "[asset-gen/image] --dry-run gesetzt, würde Bild generieren.\n";
    exit(0);
}

// === TODO: echter API-Call ===
// $ch = curl_init('https://api.openai.com/v1/images/generations');
// curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
// curl_setopt($ch, CURLOPT_HTTPHEADER, [
//     'Authorization: Bearer ' . V2_OPENAI_KEY,
//     'Content-Type: application/json',
// ]);
// curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode([
//     'model' => 'dall-e-3',
//     'prompt' => $fullPrompt,
//     'n' => 1,
//     'size' => $resolution,
//     'quality' => $quality,
//     'response_format' => 'b64_json',
// ]));
// $result = json_decode(curl_exec($ch), true);
// curl_close($ch);
// if (isset($result['data'][0]['b64_json'])) {
//     @mkdir(dirname($output), 0775, true);
//     file_put_contents($output, base64_decode($result['data'][0]['b64_json']));
//     echo "[asset-gen/image] OK: gespeichert nach $output\n";
//     exit(0);
// }
// fwrite(STDERR, "[asset-gen/image] FEHLER: " . json_encode($result) . "\n");
// exit(3);

fwrite(STDERR, "[asset-gen/image] HINWEIS: Echter API-Call noch nicht implementiert. Stub liefert nichts.\n");
fwrite(STDERR, "                  Implementierung folgt bei erstem echten Asset-Bedarf.\n");
exit(0);