start.sh

#!/bin/bash

# Start script for PaperCode project (non-Docker version)
echo "========================================="
echo "Starting PaperCode Project"
echo "========================================="

# Function to check if command exists
command_exists() {
    command -v "$1" >/dev/null 2>&1
}

# Check prerequisites
echo "Checking prerequisites..."
if ! command_exists python3 && ! command_exists python; then
    echo "❌ Python is not installed. Please install Python 3.8+"
    exit 1
fi

if ! command_exists npm; then
    echo "❌ npm is not installed. Please install Node.js and npm"
    exit 1
fi

echo "✅ Prerequisites OK"

# Function to check if port is in use
check_port() {
    if lsof -Pi :$1 -sTCP:LISTEN -t >/dev/null 2>&1; then
        echo "⚠️  Port $1 is already in use"
        read -p "Do you want to kill the process using port $1? (y/n) " -n 1 -r
        echo
        if [[ $REPLY =~ ^[Yy]$ ]]; then
            lsof -ti:$1 | xargs kill -9 2>/dev/null
            echo "✅ Killed process on port $1"
        else
            return 1
        fi
    fi
    return 0
}

# Check if ports are available
echo ""
echo "Checking ports..."
check_port 8003 || { echo "Cannot start backend on port 8003"; exit 1; }
check_port 80 || { echo "Cannot start frontend on port 80"; exit 1; }

# Check if data exists
if [ ! -d "backend/api_data" ]; then
    echo ""
    echo "⚠️  API data not found. Running data processor..."
    cd backend
    if [ -f "create_full_db.py" ]; then
        python create_full_db.py
    else
        echo "❌ Database creation script not found"
        echo "Please run: cd backend/scripts && python complete_data_processor.py"
        exit 1
    fi
    cd ..
fi

# Update arXiv papers
echo ""
echo "Updating arXiv papers..."
if [ -f "backend/scripts/daily_arxiv_update.py" ]; then
    cd backend/scripts
    python daily_arxiv_update.py --max-results 20 --days-back 1 > /dev/null 2>&1
    if [ $? -eq 0 ]; then
        echo "✅ ArXiv papers updated successfully"
    else
        echo "⚠️  ArXiv update failed (non-critical, continuing...)"
    fi
    cd ../..
else
    echo "⚠️  ArXiv update script not found (skipping...)"
fi

# Start backend server
echo ""
echo "Starting backend server..."
cd backend
python full_api_server.py &
BACKEND_PID=$!
cd ..
echo "✅ Backend server started (PID: $BACKEND_PID)"

# Wait for backend to be ready
echo "Waiting for backend to initialize..."
sleep 3

# Check if backend is running
if ! curl -s http://localhost:8003 > /dev/null 2>&1; then
    echo "❌ Backend failed to start"
    kill $BACKEND_PID 2>/dev/null
    exit 1
fi

# Start frontend server
echo ""
echo "Starting frontend server..."
cd frontend
npm start &
FRONTEND_PID=$!
cd ..

echo ""
echo "========================================="
echo "✅ PaperCode is starting up!"
echo "========================================="
echo ""
echo "Frontend: http://localhost (may take a moment to compile)"
echo "Backend:  http://localhost:8003"
echo "API Docs: http://localhost:8003/docs"
echo ""
echo "Press Ctrl+C to stop all services"
echo ""

# Function to handle shutdown
shutdown() {
    echo ""
    echo "Shutting down services..."
    kill $BACKEND_PID 2>/dev/null
    kill $FRONTEND_PID 2>/dev/null
    # Also kill any child processes
    pkill -P $BACKEND_PID 2>/dev/null
    pkill -P $FRONTEND_PID 2>/dev/null
    echo "✅ Services stopped"
    exit 0
}

# Set up trap for clean shutdown
trap shutdown INT TERM

# Wait for processes
wait $BACKEND_PID $FRONTEND_PID