import 'dart:io';

import 'package:flutter_test/flutter_test.dart';

void main() {
  group('CI Environment Tests', () {
    test('should detect GitHub Actions environment', () {
      final isGitHubActions = Platform.environment['GITHUB_ACTIONS'] == 'true';
      final isCI = Platform.environment['CI'] == 'true';
      final runnerOS = Platform.environment['RUNNER_OS'];
      
      print('Environment Variables:');
      print('  GITHUB_ACTIONS: ${Platform.environment['GITHUB_ACTIONS']}');
      print('  CI: ${Platform.environment['CI']}');
      print('  RUNNER_OS: $runnerOS');
      print('  Platform: ${Platform.operatingSystem}');
      
      if (isGitHubActions || isCI) {
        print('Running in CI/GitHub Actions environment');
        expect(isCI, isTrue, reason: 'CI environment variable should be set');
        
        if (isGitHubActions) {
          expect(runnerOS, isNotNull, reason: 'RUNNER_OS should be set in GitHub Actions');
          print('  GitHub Actions Runner OS: $runnerOS');
        }
      } else {
        print('Running in local development environment');
      }
      
      // Test should always pass regardless of environment
      expect(Platform.operatingSystem, isNotEmpty);
    });

    test('should have correct Dart/Flutter environment in CI', () {
      final dartVersion = Platform.version;
      print('Dart version: $dartVersion');
      
      // In CI, we should have Dart available
      expect(dartVersion, isNotEmpty);
      expect(dartVersion, contains('Dart'));
      
      // Check if running in CI and validate expected environment
      final isCI = Platform.environment['CI'] == 'true';
      if (isCI) {
        print('Dart environment validated in CI');
        
        // CI should have these basic characteristics
        expect(Platform.operatingSystem, anyOf('linux', 'macos', 'windows'));
        
        // GitHub Actions typically runs on Linux
        final runnerOS = Platform.environment['RUNNER_OS'];
        if (runnerOS == 'Linux') {
          expect(Platform.operatingSystem, 'linux');
        }
      }
    });

    test('should handle network connectivity gracefully', () async {
      // Simple network test that won't fail in restricted environments
      try {
        // Test with a reliable endpoint
        final socket = await Socket.connect('8.8.8.8', 53, timeout: const Duration(seconds: 5));
        socket.destroy();
        print('Network connectivity available');
      } catch (e) {
        print('Limited network connectivity: $e');
        // Don't fail the test - some CI environments have restricted network
      }
      
      // Test should always pass
      expect(true, isTrue);
    });

    test('should validate test infrastructure', () {
      // Basic test framework validation
      expect(testWidgets, isNotNull, reason: 'Flutter test framework should be available');
      expect(setUp, isNotNull, reason: 'Test setup functions should be available');
      expect(tearDown, isNotNull, reason: 'Test teardown functions should be available');
      
      print('Test infrastructure validated');
    });
  });
}