# 🔗 Webhook Integration Guide

## 📋 **Current Status: Optimized Mode (No Backend Required)**

Your bot currently uses **optimized polling mode** which works perfectly without any backend integration. It checks for new listings every 6 hours and sends notifications to users.

## 🚀 **Future Webhook Integration (When Backend is Ready)**

### **Step 1: Enable Webhook Mode**
```env
# Change in .env file
NOTIFICATION_MODE=full  # Instead of 'optimized'
WEBHOOK_PORT=3001
WEBHOOK_HOST=your-domain.com
```

### **Step 2: Backend Integration Required**

Your backend will need to send HTTP POST requests to the bot when:

#### **New Listing Created:**
```javascript
// Backend code example
const notifyBot = async (listing) => {
  try {
    await fetch('http://your-bot-server:3001/webhook/new-listing', {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({
        id: listing.id,
        title: listing.title,
        type: listing.type,        // "RENT" or "SALE"
        price: listing.price,      // Number
        subcity: listing.subcity,  // "Bole", "Kirkos", etc.
        houseType: listing.houseType, // "Apartment", "Villa", etc.
        status: listing.status,    // "ACTIVE", "DRAFT"
        createdAt: listing.createdAt
      })
    });
    console.log('Bot notified of new listing');
  } catch (error) {
    console.error('Failed to notify bot:', error);
  }
};

// Call this after creating a listing
const newListing = await createListing(data);
await notifyBot(newListing);
```

#### **Listing Updated:**
```javascript
// When listing is updated (price change, status change, etc.)
const notifyBotUpdate = async (listing) => {
  await fetch('http://your-bot-server:3001/webhook/update-listing', {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify(listing)
  });
};
```

### **Step 3: Benefits After Integration**

| Feature | Current (Optimized) | With Webhook |
|---------|-------------------|--------------|
| **Notification Speed** | Up to 6 hours | 2-5 seconds |
| **User Experience** | Good | Excellent |
| **Server Load** | Low | Very Low |
| **Setup Complexity** | Simple | Requires backend |

## 🛠️ **Backend Requirements**

### **When to Send Webhooks:**
1. ✅ New listing created with status "ACTIVE"
2. ✅ Listing updated (price, location, type changes)
3. ✅ Listing status changed to "ACTIVE"
4. ❌ Don't send for "DRAFT" listings
5. ❌ Don't send for deleted listings

### **Webhook Payload Format:**
```json
{
  "id": "listing-uuid",
  "title": "2BR Apartment in Bole",
  "type": "RENT",
  "price": 50000,
  "subcity": "Bole", 
  "houseType": "Apartment",
  "status": "ACTIVE",
  "createdAt": "2026-01-08T10:00:00Z",
  "updatedAt": "2026-01-08T10:00:00Z"
}
```

### **Error Handling:**
```javascript
const notifyBotWithRetry = async (listing, maxRetries = 3) => {
  for (let i = 0; i < maxRetries; i++) {
    try {
      const response = await fetch('http://bot:3001/webhook/new-listing', {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify(listing),
        timeout: 5000
      });
      
      if (response.ok) {
        console.log('Bot notified successfully');
        return;
      }
    } catch (error) {
      console.log(`Webhook attempt ${i + 1} failed:`, error.message);
      if (i < maxRetries - 1) {
        await new Promise(resolve => setTimeout(resolve, 1000 * (i + 1))); // Exponential backoff
      }
    }
  }
  console.error('Failed to notify bot after all retries');
};
```

## 🔄 **Migration Plan (Future)**

### **Phase 1: Preparation (Now)**
- ✅ Keep optimized mode
- ✅ Webhook code ready in bot
- ✅ Documentation prepared

### **Phase 2: Backend Development**
- [ ] Add webhook calls to backend
- [ ] Test webhook endpoints
- [ ] Implement error handling

### **Phase 3: Integration**
- [ ] Change `NOTIFICATION_MODE=full`
- [ ] Test real-time notifications
- [ ] Monitor webhook performance

### **Phase 4: Optimization**
- [ ] Fine-tune webhook reliability
- [ ] Add webhook authentication
- [ ] Implement webhook queuing

## 🧪 **Testing Webhook (When Ready)**

### **Manual Test:**
```bash
# Test new listing webhook
curl -X POST http://your-bot:3001/webhook/new-listing \
  -H "Content-Type: application/json" \
  -d '{
    "id": "test-123",
    "title": "Test Property",
    "type": "RENT",
    "price": 45000,
    "subcity": "Bole",
    "houseType": "Apartment",
    "status": "ACTIVE",
    "createdAt": "2026-01-08T10:00:00Z"
  }'
```

### **Expected Response:**
```json
{
  "success": true,
  "message": "Listing processed successfully",
  "listingId": "test-123"
}
```

## 📊 **Monitoring Webhooks**

### **Health Check:**
```bash
curl http://your-bot:3001/webhook/health
```

### **Status Check:**
```bash
curl http://your-bot:3001/status
```

## 🔒 **Security Considerations (Future)**

### **Authentication:**
```javascript
// Add API key authentication
const WEBHOOK_API_KEY = process.env.WEBHOOK_API_KEY;

app.use('/webhook', (req, res, next) => {
  const apiKey = req.headers['x-api-key'];
  if (apiKey !== WEBHOOK_API_KEY) {
    return res.status(401).json({ error: 'Unauthorized' });
  }
  next();
});
```

### **IP Whitelisting:**
```javascript
const ALLOWED_IPS = ['your.backend.ip', '127.0.0.1'];

app.use('/webhook', (req, res, next) => {
  const clientIP = req.ip;
  if (!ALLOWED_IPS.includes(clientIP)) {
    return res.status(403).json({ error: 'Forbidden' });
  }
  next();
});
```

## 💡 **Summary**

**Current Setup**: Perfect for now! Your bot works great with optimized polling.

**Future Integration**: When your backend is ready, simply:
1. Add webhook calls to backend
2. Change `NOTIFICATION_MODE=full`
3. Restart bot
4. Enjoy real-time notifications!

The webhook infrastructure is already built and ready - you just need to flip the switch when your backend supports it! 🚀