import 'dart:io';

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

Future<void> main(List<String> arguments) async {
  final keep = arguments.contains('--keep');
  final root = Directory.current.path;
  final fixture = p.join(root, 'test', 'fixtures', 'e2e_openapi.json');
  final tempDirectory = await Directory.systemTemp.createTemp(
    'koi_swagger_parser_generated_package_',
  );

  try {
    await _writePackageFiles(tempDirectory, fixture);
    await _run(Platform.resolvedExecutable, const <String>[
      'pub',
      'get',
    ], workingDirectory: tempDirectory.path);
    final configPath = p.join(tempDirectory.path, 'koi_swagger_parser.yaml');
    final result = await const KoiSwaggerParser().generate(
      configPath: configPath,
    );
    stdout.writeln(
      'Generated ${result.generatedFiles.length} files '
      '(${result.modelsCount} models, ${result.operationsCount} operations).',
    );

    await _run(Platform.resolvedExecutable, const <String>[
      'analyze',
    ], workingDirectory: tempDirectory.path);
    await _run(Platform.resolvedExecutable, const <String>[
      'test',
    ], workingDirectory: tempDirectory.path);
    stdout.writeln('Generated package verification passed.');
  } finally {
    if (keep) {
      stdout.writeln('Kept generated package at ${tempDirectory.path}');
    } else if (tempDirectory.existsSync()) {
      await tempDirectory.delete(recursive: true);
    }
  }
}

Future<void> _writePackageFiles(Directory directory, String fixture) async {
  await File(p.join(directory.path, 'pubspec.yaml')).writeAsString(r'''
name: koi_generated_e2e
publish_to: none
environment:
  sdk: ^3.11.0
dependencies:
  dio: ^5.9.0
  freezed_annotation: ^3.1.0
  json_annotation: ^4.12.0
  retrofit: ^4.9.0
dev_dependencies:
  build_runner: ^2.10.0
  freezed: ^3.2.0
  json_serializable: ^6.11.0
  retrofit_generator: ^10.2.0
  test: ^1.26.0
''');
  final output = p.join(directory.path, 'lib', 'src');
  await File(p.join(directory.path, 'koi_swagger_parser.yaml')).writeAsString(
    '''
input:
  swagger_urls:
    - url: $fixture
output:
  base_dir: $output
  api_dir: ${p.join(output, 'api')}
  models_dir: ${p.join(output, 'models')}
generation:
  api:
    response_mode: http_response
    binary_response_mode: bytes
    cancel_token_support: true
    response_wrapper:
      mode: passthrough
  models:
    class_prefix: Koi
    enum_unknown_fallback: true
formatting:
  run_dart_format: true
  run_build_runner: true
  build_runner_mode: build
  delete_conflicting_outputs: true
''',
  );

  final testDirectory = Directory(p.join(directory.path, 'test'));
  await testDirectory.create(recursive: true);
  await File(
    p.join(testDirectory.path, 'generated_smoke_test.dart'),
  ).writeAsString(r'''
import 'package:koi_generated_e2e/src/api/v1/accounts_api.dart';
import 'package:koi_generated_e2e/src/models/request/account_request.dart';
import 'package:koi_generated_e2e/src/models/result/account_response.dart';
import 'package:koi_generated_e2e/src/models/result/search_criteria.dart';
import 'package:koi_generated_e2e/src/models/result/string_or_integer.dart';
import 'package:koi_generated_e2e/src/models/shared/flexible_settings.dart';
import 'package:test/test.dart';

void main() {
  test('additional properties round-trip at the object root', () {
    const settings = KoiFlexibleSettings(
      theme: 'dark',
      additionalProperties: <String, int>{'retries': 3},
    );
    expect(settings.toJson(), <String, dynamic>{
      'theme': 'dark',
      'retries': 3,
    });

    final decoded = KoiFlexibleSettings.fromJson(<String, dynamic>{
      'theme': 'light',
      'retries': 5,
    });
    expect(decoded.theme, 'light');
    expect(decoded.additionalProperties, <String, int>{'retries': 5});
  });

  test('directional and generic union models are usable', () {
    const request = KoiAccountRequest(
      secret: 'long-secret',
      displayName: null,
      settings: KoiFlexibleSettings(theme: 'dark'),
    );
    expect(request.secret, 'long-secret');

    const response = KoiAccountResponse(
      id: 1,
      displayName: null,
      settings: KoiFlexibleSettings(theme: 'dark'),
    );
    expect(response.id, 1);

    final primitive = KoiStringOrInteger.fromJson('text');
    expect(primitive, isA<KoiStringOrIntegerString1>());

    final criteria = KoiSearchCriteria.fromJson(<String, dynamic>{
      'name': 'Koi',
      'id': 7,
    });
    expect(criteria, isA<KoiSearchCriteriaAnyOf>());
    expect((criteria as KoiSearchCriteriaAnyOf).matches, hasLength(2));
  });

  test('Retrofit transport adapter has a concrete generated implementation', () {
    expect(AccountsApi, isNotNull);
  });
}
''');
}

Future<void> _run(
  String executable,
  List<String> arguments, {
  required String workingDirectory,
}) async {
  stdout.writeln('> $executable ${arguments.join(' ')}');
  final process = await Process.start(
    executable,
    arguments,
    workingDirectory: workingDirectory,
    mode: ProcessStartMode.inheritStdio,
  );
  final exitCode = await process.exitCode;
  if (exitCode != 0) {
    throw ProcessException(
      executable,
      arguments,
      'Command failed with exit code $exitCode.',
      exitCode,
    );
  }
}