import 'dart:io';

import 'package:podman/podman.dart';

Future<void> main(List<String> args) async {
  if (args.isEmpty || args.contains('--help') || args.contains('-h')) {
    _printUsage();
    return;
  }

  final flags = args
      .where((arg) => arg.startsWith('--'))
      .toList(growable: false);
  final positional = args
      .where((arg) => !arg.startsWith('--'))
      .toList(growable: false);

  if (positional.isEmpty) {
    stderr.writeln('Provide a kube YAML file path.');
    _printUsage();
    exitCode = 64;
    return;
  }

  final yamlPath = positional.first;
  final yamlFile = File(yamlPath);
  if (!await yamlFile.exists()) {
    stderr.writeln('YAML file not found: $yamlPath');
    exitCode = 66;
    return;
  }

  final yaml = await yamlFile.readAsString();
  final down = flags.contains('--down');
  final force = flags.contains('--force');

  final replace = flags.contains('--replace');
  final serviceContainer = !flags.contains('--no-service-container');
  final networkValues = _readMultiOptions(flags, 'network');

  final client = PodmanClient();
  try {
    final report = down
        ? await client.playKubeDown(yaml, force: force)
        : await client.playKube(
            yaml,
            options: PlayKubeOptions(
              replace: replace,
              serviceContainer: serviceContainer,
              networks: networkValues,
            ),
          );

    print('Operation: ${down ? 'down' : 'up'}');
    print('Pods: ${report.pods.isEmpty ? '(none)' : report.pods}');
    print('Volumes: ${report.volumes.isEmpty ? '(none)' : report.volumes}');
    print('Secrets: ${report.secrets.isEmpty ? '(none)' : report.secrets}');
    print(
      'Service container: ${report.serviceContainerId.isEmpty ? '(none)' : report.serviceContainerId}',
    );
  } finally {
    await client.close();
  }
}

List<String> _readMultiOptions(List<String> args, String name) {
  final prefix = '--$name=';
  final values = <String>[];

  for (final arg in args) {
    if (arg.startsWith(prefix)) {
      final value = arg.substring(prefix.length);
      if (value.isNotEmpty) {
        values.add(value);
      }
    }
  }

  return values;
}

void _printUsage() {
  print('''
Play kube example

Usage:
  dart run example/play_kube_file_example.dart <kube-yaml-path> [options]

Examples:
  dart run example/play_kube_file_example.dart ./stack.yaml --replace --network=groupware
  dart run example/play_kube_file_example.dart ./stack.yaml --down --force

Options:
  --down                    Tear down resources instead of creating them
  --force                   Force delete on down operation
  --replace                 Replace existing resources on up operation
  --network=<name>          Attach created pods to network (repeatable)
  --no-service-container    Disable service container on up operation
  --help, -h                Show this help
''');
}