# Config Package Gap Analysis

## Overview

This document analyzes the gaps between our current configuration handling (in Core package) and Laravel's Config package functionality, identifying what needs to be implemented as a standalone Config package.

> **Related Documentation**
> - See [Config Package Specification](config_package_specification.md) for current implementation
> - See [Laravel Compatibility Roadmap](laravel_compatibility_roadmap.md) for overall status
> - See [Foundation Integration Guide](foundation_integration_guide.md) for integration patterns
> - See [Testing Guide](testing_guide.md) for testing approaches
> - See [Getting Started Guide](getting_started.md) for development setup

## Implementation Gaps

### 1. Missing Package Structure
```dart
// Need to create dedicated Config package:

packages/config/
├── lib/
│   ├── src/
│   │   ├── config_repository.dart
│   │   ├── environment_loader.dart
│   │   ├── config_loader.dart
│   │   └── config_cache.dart
│   └── config.dart
├── test/
└── example/
```

### 2. Missing Core Features
```dart
// 1. Config Repository
class ConfigRepository {
  // Need to implement:
  T? get<T>(String key, [T? defaultValue]);
  void set(String key, dynamic value);
  bool has(String key);
  Map<String, dynamic> all();
  void merge(Map<String, dynamic> items);
}

// 2. Environment Loading
class EnvironmentLoader {
  // Need to implement:
  Future<void> load([String? path]);
  String? get(String key, [String? defaultValue]);
  void set(String key, String value);
  bool has(String key);
}

// 3. Configuration Loading
class ConfigurationLoader {
  // Need to implement:
  Future<Map<String, dynamic>> load();
  Future<Map<String, dynamic>> loadFile(String path);
  Future<void> reload();
}
```

### 3. Missing Laravel Features
```dart
// 1. Package Configuration
class PackageConfig {
  // Need to implement:
  Future<void> publish(String package, Map<String, String> paths);
  Future<void> publishForce(String package, Map<String, String> paths);
  List<String> publishedPackages();
}

// 2. Configuration Groups
class ConfigurationGroups {
  // Need to implement:
  void group(String name, List<String> paths);
  List<String> getGroup(String name);
  bool hasGroup(String name);
}

// 3. Configuration Caching
class ConfigCache {
  // Need to implement:
  Future<void> cache(Map<String, dynamic> config);
  Future<Map<String, dynamic>?> load();
  Future<void> clear();
}
```

## Integration Gaps

### 1. Container Integration
```dart
// Need to implement:

class ConfigServiceProvider {
  void register() {
    // Register config repository
    container.singleton<ConfigContract>((c) =>
      ConfigRepository(
        loader: c.make<ConfigurationLoader>(),
        cache: c.make<ConfigCache>()
      )
    );
    
    // Register environment loader
    container.singleton<EnvironmentLoader>((c) =>
      EnvironmentLoader(
        path: c.make<PathResolver>().base
      )
    );
  }
}
```

### 2. Package Integration
```dart
// Need to implement:

class PackageServiceProvider {
  void register() {
    // Register package config
    publishConfig('my-package', {
      'config/my-package.php': 'my-package'
    });
  }
  
  void boot() {
    // Merge package config
    config.merge({
      'my-package': {
        'key': 'value'
      }
    });
  }
}
```

### 3. Environment Integration
```dart
// Need to implement:

class EnvironmentServiceProvider {
  void boot() {
    var env = container.make<EnvironmentLoader>();
    
    // Load environment files
    env.load();
    
    if (env.get('APP_ENV') == 'local') {
      env.load('.env.local');
    }
    
    // Set environment variables
    config.set('app.env', env.get('APP_ENV', 'production'));
    config.set('app.debug', env.get('APP_DEBUG', 'false') == 'true');
  }
}
```

## Documentation Gaps

### 1. Missing API Documentation
```dart
// Need to document:

/// Manages application configuration.
/// 
/// Provides access to configuration values using dot notation:
/// ```dart
/// var dbHost = config.get<String>('database.connections.mysql.host');
/// ```
class ConfigRepository {
  /// Gets a configuration value.
  /// 
  /// Returns [defaultValue] if key not found.
  T? get<T>(String key, [T? defaultValue]);
}
```

### 2. Missing Usage Examples
```dart
// Need examples for:

// 1. Basic Configuration
var appName = config.get<String>('app.name', 'My App');
var debug = config.get<bool>('app.debug', false);

// 2. Environment Configuration
var dbConfig = {
  'host': env('DB_HOST', 'localhost'),
  'port': env('DB_PORT', '3306'),
  'database': env('DB_DATABASE'),
  'username': env('DB_USERNAME'),
  'password': env('DB_PASSWORD')
};

// 3. Package Configuration
class MyPackageServiceProvider {
  void register() {
    publishConfig('my-package', {
      'config/my-package.php': 'my-package'
    });
  }
}
```

### 3. Missing Test Coverage
```dart
// Need tests for:

void main() {
  group('Config Repository', () {
    test('gets nested values', () {
      var config = ConfigRepository({
        'app': {
          'name': 'Test App',
          'nested': {'key': 'value'}
        }
      });
      
      expect(config.get('app.name'), equals('Test App'));
      expect(config.get('app.nested.key'), equals('value'));
    });
  });
  
  group('Environment Loader', () {
    test('loads env files', () async {
      var env = EnvironmentLoader();
      await env.load('.env.test');
      
      expect(env.get('APP_NAME'), equals('Test App'));
      expect(env.get('APP_ENV'), equals('testing'));
    });
  });
}
```

## Implementation Priority

1. **High Priority**
   - Create Config package structure
   - Implement core repository
   - Add environment loading
   - Add configuration loading

2. **Medium Priority**
   - Add package configuration
   - Add configuration groups
   - Add configuration caching
   - Add container integration

3. **Low Priority**
   - Add helper functions
   - Add testing utilities
   - Add debugging tools

## Next Steps

1. **Package Creation**
   - Create package structure
   - Move config code from Core
   - Add package dependencies
   - Setup testing

2. **Core Implementation**
   - Implement ConfigRepository
   - Implement EnvironmentLoader
   - Implement ConfigurationLoader
   - Add caching support

3. **Integration Implementation**
   - Add container integration
   - Add package support
   - Add environment support
   - Add service providers

Would you like me to:
1. Create the Config package structure?
2. Start implementing core features?
3. Create detailed implementation plans?

## Development Guidelines

### 1. Getting Started
Before implementing config features:
1. Review [Getting Started Guide](getting_started.md)
2. Check [Laravel Compatibility Roadmap](laravel_compatibility_roadmap.md)
3. Follow [Testing Guide](testing_guide.md)
4. Use [Foundation Integration Guide](foundation_integration_guide.md)
5. Review [Config Package Specification](config_package_specification.md)

### 2. Implementation Process
For each config feature:
1. Write tests following [Testing Guide](testing_guide.md)
2. Implement following Laravel patterns
3. Document following [Getting Started Guide](getting_started.md#documentation)
4. Integrate following [Foundation Integration Guide](foundation_integration_guide.md)

### 3. Quality Requirements
All implementations must:
1. Pass all tests (see [Testing Guide](testing_guide.md))
2. Meet Laravel compatibility requirements
3. Follow integration patterns (see [Foundation Integration Guide](foundation_integration_guide.md))
4. Match specifications in [Config Package Specification](config_package_specification.md)

### 4. Integration Considerations
When implementing config features:
1. Follow patterns in [Foundation Integration Guide](foundation_integration_guide.md)
2. Ensure Laravel compatibility per [Laravel Compatibility Roadmap](laravel_compatibility_roadmap.md)
3. Use testing approaches from [Testing Guide](testing_guide.md)
4. Follow development setup in [Getting Started Guide](getting_started.md)

### 5. Performance Guidelines
Config system must:
1. Cache configuration efficiently
2. Minimize file I/O
3. Support lazy loading
4. Handle environment variables efficiently
5. Meet performance targets in [Laravel Compatibility Roadmap](laravel_compatibility_roadmap.md#performance-benchmarks)

### 6. Testing Requirements
Config tests must:
1. Cover all configuration scenarios
2. Test environment handling
3. Verify caching behavior
4. Check file operations
5. Follow patterns in [Testing Guide](testing_guide.md)

### 7. Documentation Requirements
Config documentation must:
1. Explain configuration patterns
2. Show environment examples
3. Cover caching strategies
4. Include performance tips
5. Follow standards in [Getting Started Guide](getting_started.md#documentation)
