generateImageUrl method

@override Future<Uri> generateImageUrl({ String prompt = 'A modern office workspace with natural light', Duration timeout = const Duration(seconds: 20), })

Generate an image URL given a prompt (you can return any fetchable image URL).

Implementation

@override
Future<Uri> generateImageUrl({
  String prompt = 'A modern office workspace with natural light',
  Duration timeout = const Duration(seconds: 20),
}) async {
  // If you have DALL·E, use this section:
  if (!imageEndpointFallback) {
    final resp = await http
        .post(
      Uri.parse(_imgBaseUrl),
      headers: {
        HttpHeaders.contentTypeHeader: 'application/json',
        HttpHeaders.authorizationHeader: 'Bearer $_apiKey',
      },
      body: jsonEncode({
        'prompt': prompt,
        'n': 1,
        'size': '512x512',
      }),
    )
        .timeout(timeout);

    if (resp.statusCode >= 200 && resp.statusCode < 300) {
      final data = jsonDecode(resp.body) as Map<String, dynamic>;
      final url = (data['data']?[0]?['url'] ?? '').toString();
      if (url.isNotEmpty) return Uri.parse(url);
      throw StateError('Empty AI image URL');
    } else {
      throw HttpException('AI image error: ${resp.statusCode} ${resp.body}');
    }
  }

  // Fallback to Picsum if you don’t have image API access.
  // You can still seed by prompt hash to get a stable image.
  final seed = prompt.hashCode.abs() % 1000;
  return Uri.parse('https://picsum.photos/seed/$seed/600/400');
}