Dockerfile

# QuantumShield - Combined Production Dockerfile
# Runs both Next.js frontend and FastAPI backend in a single container
# Optimized for Hugging Face Spaces deployment

FROM python:3.11-slim as base

# Install Node.js
RUN apt-get update && apt-get install -y \
    curl \
    gcc \
    g++ \
    nginx \
    && curl -fsSL https://deb.nodesource.com/setup_20.x | bash - \
    && apt-get install -y nodejs \
    && rm -rf /var/lib/apt/lists/*

WORKDIR /app

# ============== Backend Setup ==============
COPY backend/requirements.txt ./backend/
RUN pip install --no-cache-dir -r backend/requirements.txt

COPY backend/ ./backend/
COPY models/ ./models/

# Create data directory (data will be downloaded from Google Drive at startup)
RUN mkdir -p ./data

# ============== Frontend Setup ==============
COPY frontend/package*.json ./frontend/
WORKDIR /app/frontend
RUN npm install

COPY frontend/ .

# Build frontend with API URL pointing to same origin
ENV NEXT_PUBLIC_API_URL=""
RUN npm run build

# ============== Nginx Config (Reverse Proxy) ==============
WORKDIR /app
RUN cat > /etc/nginx/nginx.conf << 'EOF'
worker_processes 1;
events { worker_connections 1024; }

http {
    include /etc/nginx/mime.types;
    default_type application/octet-stream;
    sendfile on;
    keepalive_timeout 65;

    upstream frontend {
        server 127.0.0.1:3000;
    }

    upstream backend {
        server 127.0.0.1:8000;
    }

    server {
        listen 7860;
        
        # API routes go to backend
        location /api {
            proxy_pass http://backend;
            proxy_http_version 1.1;
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_connect_timeout 60s;
            proxy_read_timeout 60s;
        }

        # Health check
        location /health {
            proxy_pass http://backend;
        }

        # Everything else goes to frontend
        location / {
            proxy_pass http://frontend;
            proxy_http_version 1.1;
            proxy_set_header Host $host;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection 'upgrade';
            proxy_cache_bypass $http_upgrade;
        }
    }
}
EOF

# ============== Start Script ==============
RUN cat > /app/start.sh << 'EOF'
#!/bin/bash

echo "Starting QuantumShield..."

# Start nginx (binds to port 7860 for HF Spaces)
nginx

# Start backend (will download data on first run)
cd /app
python -m uvicorn backend.main:app --host 127.0.0.1 --port 8000 &
BACKEND_PID=$!

# Wait for backend to initialize
sleep 5

# Start frontend
cd /app/frontend
PORT=3000 npm start &
FRONTEND_PID=$!

# Keep container alive - restart services if they die
while true; do
    if ! kill -0 $BACKEND_PID 2>/dev/null; then
        echo "Backend died, restarting..."
        cd /app
        python -m uvicorn backend.main:app --host 127.0.0.1 --port 8000 &
        BACKEND_PID=$!
    fi
    if ! kill -0 $FRONTEND_PID 2>/dev/null; then
        echo "Frontend died, restarting..."
        cd /app/frontend
        PORT=3000 npm start &
        FRONTEND_PID=$!
    fi
    sleep 30
done
EOF

RUN chmod +x /app/start.sh

# Set environment variable for backend to find models/data
ENV PYTHONPATH=/app

# HF Spaces uses port 7860
EXPOSE 7860

# Health check
HEALTHCHECK --interval=30s --timeout=10s --start-period=120s --retries=5 \
    CMD curl -f http://localhost:7860/health || exit 1

# Start all services
CMD ["/app/start.sh"]