# Voice Messages Feature Summary

## ✅ Implementation Complete

Voice messages are now fully integrated into the phone-chat minigame system!

---

## What Was Changed

### 1. UI Rendering (`js/minigames/phone-chat/phone-chat-ui.js`)
**Modified**: `addMessage()` method (lines 277-350)

**Before**:
- All messages rendered as simple text bubbles

**After**:
- Detects `"voice:"` prefix in message text
- Renders voice message UI for voice content
- Renders regular text bubble for normal messages

**Code**:
```javascript
const isVoiceMessage = trimmedText.toLowerCase().startsWith('voice:');

if (isVoiceMessage) {
    // Extract transcript
    const transcript = trimmedText.substring(6).trim();
    
    // Render voice UI with play button + waveform + transcript
} else {
    // Render regular text bubble
}
```

### 2. Runtime Conversion (`js/utils/phone-message-converter.js`)
**Modified**: `toInkJSON()` method (lines 7-50)

**Added**:
- Automatic "voice: " prefix for `phoneObject.voice` properties

**Code**:
```javascript
let messageText = phoneObject.voice || phoneObject.text || '';

// Add "voice: " prefix if this is a voice message
if (phoneObject.voice) {
    messageText = `voice: ${messageText}`;
}
```

**Result**: Old scenario JSON with `voice` property automatically gets voice message UI!

### 3. Test Examples
**Created**:
- `scenarios/ink/voice-message-example.ink` - Pure voice message
- `scenarios/ink/mixed-message-example.ink` - Mix of text and voice
- `scenarios/compiled/voice-message-example.json` - Compiled
- `scenarios/compiled/mixed-message-example.json` - Compiled

**Updated**: `test-phone-chat-minigame.html`
- Added IT Team NPC (pure voice)
- Added David NPC (mixed messages)

---

## How to Use

### Method 1: Ink Files (Manual)
Write `voice:` prefix in your Ink story:

```ink
=== start ===
voice: This is a voice message from security.
-> END
```

### Method 2: Scenario JSON (Automatic)
Use `voice` property in phone objects:

```json
{
  "type": "phone",
  "name": "Security Alert",
  "phoneId": "player_phone",
  "voice": "Security breach detected!",
  "sender": "Security Team"
}
```

**Both methods produce the same voice message UI!**

---

## Visual Result

### Voice Message UI
```
┌─────────────────────────────────┐
│  ▶️  ~~~~~~~~~~~~~~~~~~~         │  ← Play button + waveform
│                                  │
│  📄 Transcript:                  │
│  Security breach detected in     │  ← Message text
│  server room. Code: 4829.        │
│                                  │
│                          2:18 PM │  ← Timestamp
└─────────────────────────────────┘
```

### Regular Text UI
```
┌─────────────────────────────────┐
│  Hey! How's it going?            │  ← Plain text
│                          2:18 PM │  ← Timestamp
└─────────────────────────────────┘
```

---

## Assets Used

All assets already exist in the project:
- ✅ `assets/icons/play.png` - Play button icon
- ✅ `assets/mini-games/audio.png` - Audio waveform sprite
- ✅ `css/phone.css` - Voice message styling (lines 311-370)

**No new assets needed!**

---

## Testing

### Quick Test
1. Open `test-phone-chat-minigame.html`
2. Click "Register Test NPCs"
3. Click "📱 Open Phone"
4. Open "IT Team" contact → See voice message UI
5. Open "David - Tech Support" → See mixed text + voice

### Expected Behavior
- **IT Team**: Single voice message with waveform
- **David**: First message is text, then voice message after choice
- Both show appropriate UI for each message type

---

## Backward Compatibility

### ✅ Old Ink Files
Files without `voice:` prefix still work:
```ink
=== start ===
This is a regular message.
-> END
```
Result: Regular text bubble (unchanged)

### ✅ Old Scenario JSON
Phone objects with `text` property:
```json
{"type": "phone", "text": "Hello"}
```
Result: Regular text bubble

Phone objects with `voice` property:
```json
{"type": "phone", "voice": "Hello"}
```
Result: Voice message UI (automatic!)

### ✅ Existing NPCs
All registered NPCs continue working:
- Interactive chats unchanged
- Simple messages work with both text and voice
- Mixed content supported

---

## Use Cases

### Perfect for Voice Messages
- 🚨 **Security alerts**: "Emergency! Evacuate floor 3!"
- 📞 **Voicemail**: "Hey, call me back when you get this"
- 🔑 **Sensitive info**: "The code is 4-8-2-9"
- 😰 **Dramatic moments**: "I think someone is following me..."
- 📋 **Instructions**: "Go to server room, enter PIN 4829"

### Keep as Text
- 💬 **Casual chat**: "Hey! What's up?"
- ❓ **Questions**: "Did you finish the report?"
- 👍 **Quick replies**: "Got it, thanks!"
- 📝 **Typed messages**: General conversation

---

## Technical Details

### Message Flow
1. **Ink Story** outputs: `"voice: Message here"`
2. **phone-chat-minigame.js** calls: `ui.addMessage('npc', text)`
3. **phone-chat-ui.js** detects `"voice:"` prefix
4. **Rendering**: Voice UI or text bubble
5. **Display**: Appropriate HTML structure

### Detection Logic
```javascript
// Case-insensitive check
const isVoiceMessage = trimmedText.toLowerCase().startsWith('voice:');

// Extract transcript (remove prefix)
const transcript = trimmedText.substring(6).trim();
```

### HTML Structure
```html
<!-- Voice Message -->
<div class="message-bubble npc">
    <div class="voice-message-display">
        <div class="audio-controls">
            <div class="play-button">
                <img src="assets/icons/play.png">
            </div>
            <img src="assets/mini-games/audio.png" class="audio-sprite">
        </div>
        <div class="transcript">
            <strong>Transcript:</strong><br>
            Extracted message text
        </div>
    </div>
    <div class="message-time">2:18</div>
</div>
```

---

## Advantages

### 1. Visual Variety
- Mix text and voice for engaging conversations
- Different message types convey different meanings
- More realistic phone experience

### 2. Zero Configuration
- Works with existing Ink files
- No new assets needed
- Backward compatible
- Automatic conversion for scenarios

### 3. Game Design Flexibility
- Use voice for important/urgent messages
- Use text for casual conversation
- Mix both in same conversation
- Natural storytelling tool

### 4. Educational Value
- Demonstrates different communication types
- Shows security concepts (voice vs text)
- Realistic cyber-physical scenarios

---

## Current Limitations

### What Works
- ✅ Voice message detection via `voice:` prefix
- ✅ Visual UI with play button + waveform
- ✅ Transcript display
- ✅ Automatic conversion from scenario JSON
- ✅ Mixed text + voice conversations
- ✅ Backward compatibility

### Not Implemented (Future)
- ❌ Actual audio playback (decorative only)
- ❌ Animated waveforms
- ❌ Player voice responses
- ❌ Audio file attachments
- ❌ Recording functionality

**These are UI enhancements, not core features**

---

## Examples

### Example 1: Security Alert (Pure Voice)
```ink
=== start ===
voice: Security alert! Unauthorized access detected in server room. Changed access code to 4829.
-> END
```

### Example 2: Mixed Conversation
```ink
=== start ===
Hey! Thanks for getting back to me.

+ [No problem!]
    voice: I can't type this safely. The director is listening. Meet me at the server room at midnight.
    + + [Got it]
        Perfect. See you then.
        -> END
```

### Example 3: Voicemail Chain
```ink
=== start ===
voice: First voicemail - I need to talk to you urgently.

+ [Listen to next message]
    voice: Second voicemail - It's about the security breach. Call me.
    + + [Listen to final message]
        voice: Final message - I found evidence. It's in locker 42.
        -> END
```

---

## Documentation

Created comprehensive docs:
- ✅ `VOICE_MESSAGES.md` - Full feature documentation
- ✅ `VOICE_MESSAGES_SUMMARY.md` - This summary
- ✅ Code comments in `phone-chat-ui.js`
- ✅ Examples in `scenarios/ink/`

---

## Summary

**What**: Voice message UI in phone-chat system

**How**: Prefix messages with `"voice:"` in Ink files

**Why**: Visual variety, realism, game design flexibility

**Status**: ✅ **Fully Implemented & Tested**

**Integration**: 
- ✅ Works with Ink files (manual prefix)
- ✅ Works with scenario JSON (automatic conversion)
- ✅ Backward compatible with all existing code
- ✅ Zero breaking changes

**It just works!** 🎤

---

**Version**: 1.0  
**Date**: 2025-10-30  
**Author**: GitHub Copilot  
**Status**: Complete
