Display Glasses

// G1 capabilities
{
  modelName: "Even Realities G1",
  hasDisplay: true,
  hasCamera: false,
  hasMicrophone: true,
  hasSpeaker: false
}

// Z100 capabilities
{
  modelName: "Vuzix Z100",
  hasDisplay: true,
  hasCamera: false,
  hasMicrophone: false,
  hasSpeaker: false
}

protected async onSession(session: AppSession, sessionId: string, userId: string) {
  const caps = session.capabilities;
  if (!caps?.hasDisplay) {
    session.logger.warn('No display available');
    return;
  }

  const display = caps.display;
  if (display) {
    session.logger.info('Resolution:', display.resolution);
    session.logger.info('Is color:', display.isColor);
    session.logger.info('Max lines:', display.maxTextLines);
  }
}

const maxLines = caps.display?.maxTextLines || 3;

if (maxLines < 5) {
  // Small display - brief message
  session.layouts.showTextWall('Done!');
} else {
  // Larger display - more detail
  session.layouts.showReferenceCard('Complete', 'Task finished successfully');
}

const isColor = caps.display?.isColor;

if (!isColor) {
  // Monochrome - use high contrast
  session.layouts.showTextWall('Status: Active');
  // Avoid complex graphics
} else {
  // Color display available
  session.layouts.showTextWall('✓ Status: Active');
}

if (!caps.hasSpeaker) {
  // Audio plays through phone
  await session.audio.speak('Hello!');

  // User hears through phone speaker or Bluetooth headphones
}

if (caps.hasMicrophone) {
  session.events.onTranscription((data) => {
    if (data.isFinal) {
      session.layouts.showTextWall(data.text);
    }
  });
}

// Voice input happens through phone's microphone
session.events.onTranscription((data) => {
  // Still works - uses phone mic
});

// ✅ Good - readable
session.layouts.showTextWall('Message sent');

// ❌ Avoid - too much text
session.layouts.showTextWall(
  'Your message has been successfully sent to the recipient and they will receive it shortly'
);

// Simple status
session.layouts.showTextWall('Ready');

// Structured info
session.layouts.showReferenceCard(
  'Weather',
  'Sunny\n72°F\nHumidity: 45%'
);

// Two-part content
session.layouts.showDoubleTextWall({
  topText: 'Question:',
  bottomText: 'What is 2 + 2?'
});

class DisplayGlassesApp extends AppServer {
  protected async onSession(session: AppSession, sessionId: string, userId: string) {
    const caps = session.capabilities;

    if (!caps?.hasDisplay) {
      session.logger.warn('No display - audio only');
      await session.audio.speak('Welcome');
      return;
    }

    // Show welcome on display
    session.layouts.showTextWall('Voice Assistant Ready');

    // Use microphone if available
    if (caps.hasMicrophone) {
      session.events.onTranscription((data) => {
        if (data.isFinal) {
          this.handleCommand(session, data.text);
        }
      });
    } else {
      // Phone microphone still works
      session.events.onTranscription((data) => {
        if (data.isFinal) {
          this.handleCommand(session, data.text);
        }
      });
    }
  }

  private handleCommand(session: AppSession, text: string) {
    session.layouts.showTextWall(`You said: ${text}`);

    // Speak response if no speaker on glasses
    if (!session.capabilities?.hasSpeaker) {
      session.audio.speak('Processing');
    }
  }
}