# Backward Compatibility Fixes

## Problem Analysis

The build error occurred because external apps were trying to use methods and classes that didn't exist in the current onairos package:

### Missing Components:
1. **`OnairosService` class** - External apps expected this main service class
2. **`initializeApiKey` method** - External apps were calling this method
3. **`OnairosConfig` class** - Configuration class for SDK initialization
4. **`auto` parameter** - Parameter in Onairos widget constructor

## Solutions Implemented

### 1. Created OnairosService Class
**File:** `lib/services/onairos_service.dart`

```dart
class OnairosService {
  // Main service class providing unified interface
  Future<void> initializeApiKey(OnairosConfig config) async { ... }
  Future<void> initialize({...}) async { ... }
  Map<String, String> getAuthHeaders() { ... }
  // ... other methods
}
```

### 2. Created OnairosConfig Class
**File:** `lib/models/onairos_config.dart`

```dart
class OnairosConfig {
  final String? apiKey;
  final String? environment;
  final bool autoInitWithAdmin;
  final bool debug;
  
  const OnairosConfig({...});
  factory OnairosConfig.fromMap(Map<String, dynamic> map) { ... }
  Map<String, dynamic> toMap() { ... }
}
```

### 3. Added Backward Compatibility Parameter
**File:** `lib/onairos_button.dart`

```dart
class Onairos extends StatefulWidget {
  // ... existing parameters
  final bool? auto; // Backward compatibility parameter
  
  const Onairos({
    // ... existing parameters
    this.auto, // Backward compatibility parameter
  });
}
```

### 4. Updated Main Export File
**File:** `lib/onairos.dart`

```dart
export 'onairos_button.dart';
export 'services/onairos_service.dart';
export 'models/onairos_config.dart';
export 'services/api_key_service.dart';
```

## Usage Examples

### For External Apps (Backward Compatible)
```dart
import 'package:onairos/onairos.dart';

// Initialize the service
final service = OnairosService();
await service.initializeApiKey(OnairosConfig(
  apiKey: 'your_api_key',
  environment: 'production',
  autoInitWithAdmin: true,
  debug: false,
));

// Use the widget with auto parameter
Onairos(
  AppName: 'My App',
  auto: false, // Now works without errors
  // ... other parameters
);
```

### For New Apps (Recommended)
```dart
import 'package:onairos/onairos.dart';

// Use the modern API
final service = OnairosService();
await service.initialize(
  apiKey: 'your_api_key',
  environment: 'production',
  autoInitWithAdmin: true,
  debug: false,
);

// Use the widget normally
Onairos(
  AppName: 'My App',
  // ... other parameters
);
```

## Benefits

1. **Backward Compatibility**: External apps can continue using their existing code
2. **Unified Interface**: OnairosService provides a clean API for SDK management
3. **Flexible Configuration**: OnairosConfig allows for easy configuration management
4. **Future-Proof**: New features can be added without breaking existing code

## Migration Guide

### For External Apps
No changes needed! The fixes are backward compatible.

### For New Development
Use the modern `OnairosService` and `OnairosConfig` classes for better type safety and functionality.

## Testing

The compatibility can be tested using the `test_compatibility.dart` file which verifies:
- OnairosService class availability
- OnairosConfig class availability  
- initializeApiKey method functionality
- auto parameter acceptance in Onairos widget
