# Deploying Node.js Transcription Server

## Quick Deploy with PM2

### Step 1: Upload Files to Server

```bash
# From your local machine:
rsync -avz --exclude 'node_modules' --exclude 'data' \
  server/nodejs/ shadowdao@your-server:/home/shadowdao/local-transcription/server/nodejs/
```

Or manually upload:
- `server.js`
- `package.json`
- `ecosystem.config.js`

### Step 2: Install Dependencies

```bash
# SSH into your server
ssh shadowdao@your-server

# Navigate to directory
cd /home/shadowdao/local-transcription/server/nodejs

# Install dependencies
npm install --production
```

### Step 3: Create Log Directory

```bash
# Create log directory if it doesn't exist
mkdir -p /home/shadowdao/logs/transcription
chmod 755 /home/shadowdao/logs/transcription
```

### Step 4: Create Data Directory

```bash
# Create data directory for room storage
mkdir -p /home/shadowdao/local-transcription/server/nodejs/data
chmod 755 /home/shadowdao/local-transcription/server/nodejs/data
```

### Step 5: Update ecosystem.config.js Paths

Edit `ecosystem.config.js` and update these paths:

```javascript
cwd: '/home/shadowdao/local-transcription/server/nodejs',  // ← Your actual path
DATA_DIR: '/home/shadowdao/local-transcription/server/nodejs/data',
log_file: '/home/shadowdao/logs/transcription/app.log',  // ← Your log path
```

### Step 6: Start with PM2

```bash
# Start the server
pm2 start ecosystem.config.js --env production

# Save PM2 configuration
pm2 save

# Set up PM2 to start on boot (first time only)
pm2 startup
# Follow the instructions it prints

# Check status
pm2 status
```

---

## PM2 Management Commands

### Check Status
```bash
pm2 status                    # List all apps
pm2 show transcription-server # Detailed info
```

### View Logs
```bash
pm2 logs transcription-server           # Live logs
pm2 logs transcription-server --lines 100  # Last 100 lines
pm2 logs transcription-server --err     # Errors only
```

### Restart/Stop
```bash
pm2 restart transcription-server
pm2 stop transcription-server
pm2 delete transcription-server  # Remove from PM2
```

### Monitor
```bash
pm2 monit  # Real-time monitoring (CPU, memory, logs)
```

### Update Code
```bash
# After uploading new code:
pm2 restart transcription-server
```

---

## Configuration Options

### Change Port

Edit `ecosystem.config.js`:
```javascript
env_production: {
  PORT: 3001,  // ← Change port here
}
```

Then restart:
```bash
pm2 restart transcription-server
```

### Increase Memory Limit

If you get "JavaScript heap out of memory" errors:

```javascript
max_memory_restart: '1G',  // ← Increase from 512M
env_production: {
  NODE_OPTIONS: '--max-old-space-size=800'  // ← Increase from 400
}
```

### Enable File Watching (Development)

```javascript
watch: true,
ignore_watch: ['node_modules', 'data', 'logs'],
```

**Warning:** Don't use in production (unnecessary restarts)

---

## Nginx Reverse Proxy (Optional)

To serve on port 80/443 with SSL:

### Create Nginx Config

```bash
sudo nano /etc/nginx/sites-available/transcription
```

Add:
```nginx
server {
    listen 80;
    server_name transcription.yourdomain.com;

    location / {
        proxy_pass http://127.0.0.1:3000;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection 'upgrade';
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_cache_bypass $http_upgrade;

        # WebSocket support
        proxy_read_timeout 86400;
    }
}
```

Enable:
```bash
sudo ln -s /etc/nginx/sites-available/transcription /etc/nginx/sites-enabled/
sudo nginx -t
sudo systemctl reload nginx
```

### Add SSL with Let's Encrypt

```bash
sudo apt install certbot python3-certbot-nginx
sudo certbot --nginx -d transcription.yourdomain.com
```

---

## Firewall Configuration

### Allow Port 3000

```bash
# UFW
sudo ufw allow 3000/tcp

# iptables
sudo iptables -A INPUT -p tcp --dport 3000 -j ACCEPT
sudo iptables-save
```

### Or Use Nginx (Port 80/443)

```bash
sudo ufw allow 'Nginx Full'
```

---

## Environment Variables

You can add environment variables in `ecosystem.config.js`:

```javascript
env_production: {
  NODE_ENV: 'production',
  PORT: 3000,

  // Custom variables
  MAX_ROOMS: 100,
  ROOM_CLEANUP_INTERVAL: 7200000,  // 2 hours in ms
  MAX_CLIENTS_PER_ROOM: 50,

  // Data storage
  DATA_DIR: '/home/shadowdao/transcription-data',
}
```

Access in `server.js`:
```javascript
const PORT = process.env.PORT || 3000;
const MAX_ROOMS = process.env.MAX_ROOMS || 100;
```

---

## Monitoring & Maintenance

### Check Server is Running

```bash
curl http://localhost:3000
# Should see HTML response

curl http://localhost:3000/api/list?room=test
# Should see: {"transcriptions":[]}
```

### Check WebSocket

```bash
# Install wscat
npm install -g wscat

# Test WebSocket connection
wscat -c ws://localhost:3000/ws?room=test
```

### Monitor Resources

```bash
pm2 monit  # PM2 built-in monitor

# Or use htop
htop  # Look for "node" process
```

### Log Rotation

PM2 handles log rotation automatically, but you can configure it:

```bash
pm2 install pm2-logrotate

pm2 set pm2-logrotate:max_size 10M
pm2 set pm2-logrotate:retain 7
pm2 set pm2-logrotate:compress true
```

---

## Troubleshooting

### Server Won't Start

```bash
# Check logs
pm2 logs transcription-server --err

# Common issues:
# 1. Port already in use
sudo lsof -i :3000
# Kill the process or change port

# 2. Missing dependencies
cd /home/shadowdao/local-transcription/server/nodejs
npm install

# 3. Permission issues
chmod 755 server.js
```

### WebSocket Not Working

```bash
# Check if server is listening
netstat -tlnp | grep 3000

# Check Nginx config if using reverse proxy
sudo nginx -t

# Check firewall
sudo ufw status
```

### Out of Memory

```bash
# Check memory usage
pm2 show transcription-server

# Increase in ecosystem.config.js:
max_memory_restart: '1G',
NODE_OPTIONS: '--max-old-space-size=800'

# Restart
pm2 restart transcription-server
```

### Too Many Rooms (Disk Full)

```bash
# Check data directory size
du -sh /home/shadowdao/local-transcription/server/nodejs/data

# Clean old rooms manually
cd /home/shadowdao/local-transcription/server/nodejs/data
find . -name "room_*.json" -mtime +1 -delete  # Delete files older than 1 day
```

---

## Production Checklist

- [ ] Dependencies installed (`npm install --production`)
- [ ] Log directory created and writable
- [ ] Data directory created and writable
- [ ] Paths updated in `ecosystem.config.js`
- [ ] PM2 started (`pm2 start ecosystem.config.js --env production`)
- [ ] PM2 saved (`pm2 save`)
- [ ] PM2 startup configured (`pm2 startup`)
- [ ] Firewall configured (port 3000 or Nginx)
- [ ] Nginx reverse proxy configured (optional)
- [ ] SSL certificate installed (optional)
- [ ] Test with `curl http://your-server:3000`
- [ ] Test WebSocket with browser display page
- [ ] Monitor for 24 hours to ensure stability

---

## Backup & Restore

### Backup Room Data

```bash
# Backup data directory
tar -czf transcription-backup-$(date +%Y%m%d).tar.gz \
  /home/shadowdao/local-transcription/server/nodejs/data

# Move to backup location
mv transcription-backup-*.tar.gz /home/shadowdao/backups/
```

### Automated Backup (Cron)

```bash
crontab -e
```

Add:
```cron
# Backup transcription data daily at 2 AM
0 2 * * * tar -czf /home/shadowdao/backups/transcription-$(date +\%Y\%m\%d).tar.gz /home/shadowdao/local-transcription/server/nodejs/data

# Delete backups older than 7 days
0 3 * * * find /home/shadowdao/backups/transcription-*.tar.gz -mtime +7 -delete
```

---

## Performance Tuning

### For High Traffic (100+ concurrent users)

```javascript
// In ecosystem.config.js:
max_memory_restart: '2G',
env_production: {
  NODE_OPTIONS: '--max-old-space-size=1600'
}
```

### Cluster Mode (Multiple CPU Cores)

```javascript
exec_mode: 'cluster',
instances: 2,  // Use 2 CPU cores
```

**Warning:** Cluster mode requires sticky sessions for WebSockets. Use single instance unless you implement Redis for session sharing.

---

## Getting Help

If issues persist:

1. Check logs: `pm2 logs transcription-server`
2. Check server status: `pm2 show transcription-server`
3. Test manually: `node server.js` (see direct output)
4. Check Node.js version: `node --version` (needs 14+)
5. Check port availability: `sudo lsof -i :3000`

---

## Example Deploy Script

Create `deploy.sh`:

```bash
#!/bin/bash
# Deploy transcription server

SERVER="shadowdao@your-server"
REMOTE_PATH="/home/shadowdao/local-transcription/server/nodejs"

echo "Uploading files..."
rsync -avz --exclude 'node_modules' --exclude 'data' \
  ./ $SERVER:$REMOTE_PATH/

echo "Installing dependencies..."
ssh $SERVER "cd $REMOTE_PATH && npm install --production"

echo "Restarting server..."
ssh $SERVER "pm2 restart transcription-server"

echo "Checking status..."
ssh $SERVER "pm2 status transcription-server"

echo "Deployment complete!"
```

Make executable:
```bash
chmod +x deploy.sh
```

Use:
```bash
./deploy.sh
```

---

**Server should now be accessible at:**
- Homepage: `http://your-server:3000`
- API: `http://your-server:3000/api/send`
- Display: `http://your-server:3000/display?room=test`