export interface IStreamKindStrategy {
  getStreamKind(): string;
  getChannelOptions(): string[];
  getTestDescription(): string;
}

export class RealTimeStreamStrategy implements IStreamKindStrategy {
  getStreamKind(): string {
    return 'RealTime';
  }
  
  getChannelOptions(): string[] {
    return [];
  }
  
  getTestDescription(): string {
    return 'RealTime stream subscription test';
  }
}

export class ChunkedStreamHLSStrategy implements IStreamKindStrategy {
  getStreamKind(): string {
    return 'ChunkedStream HLS';
  }
  
  getChannelOptions(): string[] {
    return ['hls'];
  }
  
  getTestDescription(): string {
    return 'ChunkedStream HLS subscription test';
  }
}

export class ChunkedStreamDASHStrategy implements IStreamKindStrategy {
  getStreamKind(): string {
    return 'ChunkedStream DASH';
  }
  
  getChannelOptions(): string[] {
    return ['dash'];
  }
  
  getTestDescription(): string {
    return 'ChunkedStream DASH subscription test';
  }
}

// Example of how easy it is to add new stream types
export class WebRTCStreamStrategy implements IStreamKindStrategy {
  getStreamKind(): string {
    return 'WebRTC';
  }
  
  getChannelOptions(): string[] {
    return ['webrtc', 'low-latency'];
  }
  
  getTestDescription(): string {
    return 'WebRTC stream subscription test';
  }
}

export class StreamKindStrategyFactory {
  static createStrategy(streamType: string): IStreamKindStrategy {
    switch (streamType.toLowerCase()) {
      case 'realtime':
        return new RealTimeStreamStrategy();
      case 'hls':
        return new ChunkedStreamHLSStrategy();
      case 'dash':
        return new ChunkedStreamDASHStrategy();
      case 'webrtc':
        return new WebRTCStreamStrategy();
      default:
        throw new Error(`Unknown stream type: ${streamType}`);
    }
  }
}