import 'dart:io';

import 'package:koi_swagger_parser/koi_swagger_parser.dart';
import 'package:path/path.dart' as p;

Future<void> main() async {
  final tempDir = await Directory.systemTemp.createTemp(
    'koi_swagger_parser_example_',
  );
  try {
    final exampleDirectory = _findExampleDirectory();
    final openApiPath = p.join(exampleDirectory.path, 'openapi.yaml');
    final outputDirectory = p.join(tempDir.path, 'generated');
    final configFile = File(p.join(tempDir.path, 'koi_swagger_parser.yaml'));
    await configFile.writeAsString('''
input:
  swagger_urls:
    - ${_yamlString(openApiPath)}

output:
  base_dir: ${_yamlString(outputDirectory)}
  api_dir: ${_yamlString(p.join(outputDirectory, 'api'))}
  models_dir: ${_yamlString(p.join(outputDirectory, 'models'))}
  manifest_path: ${_yamlString(p.join(tempDir.path, 'manifest.json'))}

generation:
  api:
    response_wrapper:
      mode: passthrough

formatting:
  run_dart_format: true
''');

    final result = await const KoiSwaggerParser().generate(
      configPath: configFile.path,
    );

    print(
      'Loaded ${result.sourceDocuments.length} source(s), '
      'parsed ${result.operationsCount} operation(s), and '
      'generated ${result.writtenFiles.length} file(s) for '
      '${result.modelsCount} model(s):',
    );
    for (final file in result.writtenFiles) {
      print('  ${p.relative(file, from: outputDirectory)}');
    }
  } finally {
    await tempDir.delete(recursive: true);
  }
}

Directory _findExampleDirectory() {
  final scriptDirectory = File.fromUri(Platform.script).parent;
  final workingDirectory = Directory(p.join(Directory.current.path, 'example'));
  for (final directory in <Directory>[scriptDirectory, workingDirectory]) {
    if (File(p.join(directory.path, 'openapi.yaml')).existsSync()) {
      return directory;
    }
  }
  throw StateError(
    'Could not find example/openapi.yaml. Run this example from the package '
    'root with "dart run example/koi_swagger_parser_example.dart".',
  );
}

String _yamlString(String value) => "'${value.replaceAll("'", "''")}'";