import 'package:swagger_generator_flutter/core/config_repository.dart';
import 'package:swagger_generator_flutter/utils/string_utils/text_cleaner.dart';

/// Template service for generating comments and file headers
class TemplateService {
  // No instance fields needed; all methods use ConfigRepository.

  /// Generate comment block
  static String generateComment(String text, {bool isBlock = false}) {
    if (text.isEmpty) return '';

    final cleanText = TextCleaner.cleanDescription(text);

    if (isBlock) {
      return '/**\n * $cleanText\n */';
    } else {
      return '/// $cleanText';
    }
  }

  /// Generate file header
  String generateFileHeader(
    String description,
    String source, {
    String? fileName,
    String? fileType,
  }) {
    // Load configuration repository synchronously
    final config = ConfigRepository.loadSync();
    final template = config.fileHeaderTemplate;

    if (template != null && template.isNotEmpty) {
      return _applyFileHeaderTemplate(
        template,
        description: description,
        source: source,
        fileName: fileName ?? '',
        fileType: fileType ?? description,
        generatorName: config.generatorName,
        author: config.author,
        copyright: config.copyright,
      );
    }

    // Use default template
    final generatorName = config.generatorName;
    final author = config.author;
    final copyright = config.copyright;

    return '''
// $description
// 由 $generatorName by $author 生成
// $copyright
''';
  }

  /// Apply file header template
  String _applyFileHeaderTemplate(
    String template, {
    required String description,
    required String source,
    required String fileName,
    required String fileType,
    required String generatorName,
    required String author,
    required String copyright,
  }) {
    var result = template;

    // Replace template variables
    result = result.replaceAll('{fileName}', fileName);
    result = result.replaceAll('{fileType}', fileType);
    result = result.replaceAll('{swaggerUrl}', source);
    result = result.replaceAll('{generatorName}', generatorName);
    result = result.replaceAll('{author}', author);
    result = result.replaceAll('{copyright}', copyright);

    // If template doesn't contain comments, add default format
    if (!result.contains('//')) {
      result = '// $description\n$result';
    }

    return result;
  }
}