#!/bin/bash

# ============================================================================
# Lux Studio - Local Development Setup & Start Script
# ============================================================================
# This script sets up AND starts both frontend and backend for LOCAL development
# For production deployment, use deploy.sh instead
# ============================================================================

set -e  # Exit on any error

echo "🎬 Setting up Lux Studio for Local Development..."
echo ""

# Colors for output
GREEN='\033[0;32m'
BLUE='\033[0;34m'
YELLOW='\033[1;33m'
RED='\033[0;31m'
NC='\033[0m' # No Color

# Get the absolute path of the project root
PROJECT_ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"

# ============================================================================
# 1. CHECK PREREQUISITES
# ============================================================================

echo "${BLUE}Step 1: Checking prerequisites...${NC}"

if ! command -v node &> /dev/null; then
    echo "${RED}✗ Node.js not found. Please install Node.js 18+ first.${NC}"
    exit 1
fi

if ! command -v npm &> /dev/null; then
    echo "${RED}✗ npm not found. Please install npm first.${NC}"
    exit 1
fi

if ! command -v php &> /dev/null; then
    echo "${RED}✗ PHP not found. Please install PHP 7.4+ first.${NC}"
    exit 1
fi

if ! command -v composer &> /dev/null; then
    echo "${RED}✗ Composer not found. Please install Composer first.${NC}"
    exit 1
fi

echo "${GREEN}✓ All prerequisites installed${NC}"
echo "  Node.js: $(node --version)"
echo "  npm: $(npm --version)"
echo "  PHP: $(php --version | head -n 1)"
echo "  Composer: $(composer --version | head -n 1)"
echo ""

# ============================================================================
# 2. SETUP BACKEND
# ============================================================================

echo "${BLUE}Step 2: Setting up backend...${NC}"
cd backend

# Create .env from .env.local
if [ ! -f ".env" ]; then
    if [ -f ".env.local" ]; then
        echo "  → Creating backend/.env from .env.local..."
        cp .env.local .env
        echo "${GREEN}  ✓ backend/.env created with local development settings${NC}"
    else
        echo "${RED}  ✗ Error: .env.local not found${NC}"
        echo "     Please ensure backend/.env.local exists"
        exit 1
    fi
else
    echo "${GREEN}  ✓ backend/.env already exists${NC}"
fi

# Install PHP dependencies
echo "  → Installing PHP dependencies via Composer..."
composer install --quiet

if [ $? -eq 0 ]; then
    echo "${GREEN}✓ Backend setup complete${NC}"
else
    echo "${RED}✗ Backend setup failed${NC}"
    exit 1
fi

cd ..
echo ""

# ============================================================================
# 3. SETUP FRONTEND
# ============================================================================

echo "${BLUE}Step 3: Setting up frontend...${NC}"
cd frontend

# Create .env from .env.local
if [ ! -f ".env" ]; then
    if [ -f ".env.local" ]; then
        echo "  → Creating frontend/.env from .env.local..."
        cp .env.local .env
        echo "${GREEN}  ✓ frontend/.env created with local development settings${NC}"
    else
        echo "${RED}  ✗ Error: .env.local not found${NC}"
        echo "     Please ensure frontend/.env.local exists"
        exit 1
    fi
else
    echo "${GREEN}  ✓ frontend/.env already exists${NC}"
fi

# Install npm dependencies
echo "  → Installing npm dependencies (this may take a few minutes)..."
npm install --silent

if [ $? -eq 0 ]; then
    echo "${GREEN}✓ Frontend setup complete${NC}"
else
    echo "${RED}✗ Frontend setup failed${NC}"
    exit 1
fi

cd ..
echo ""

# ============================================================================
# 4. CREATE REQUIRED DIRECTORIES
# ============================================================================

echo "${BLUE}Step 4: Creating required directories...${NC}"

# Create backend upload directory with proper permissions
mkdir -p backend/uploads/sessions
chmod -R 755 backend/uploads 2>/dev/null || true

echo "${GREEN}✓ Required directories created${NC}"
echo ""

# ============================================================================
# 5. READ PORT CONFIGURATION
# ============================================================================

# Read ports from .env files
BACKEND_PORT=5015  # Default
FRONTEND_PORT=3000  # Default

if [ -f "backend/.env" ]; then
    BACKEND_PORT=$(grep -E "^BACKEND_PORT=" backend/.env | cut -d'=' -f2 | tr -d ' ')
fi

if [ -f "frontend/.env" ]; then
    FRONTEND_PORT=$(grep -E "^FRONTEND_PORT=" frontend/.env | cut -d'=' -f2 | tr -d ' ')
fi

# Use defaults if not found
BACKEND_PORT=${BACKEND_PORT:-5015}
FRONTEND_PORT=${FRONTEND_PORT:-3000}

# ============================================================================
# 6. CHECK FOR PORT CONFLICTS
# ============================================================================

echo "${BLUE}Step 5: Checking for port conflicts...${NC}"

# Function to check if a port is in use
check_port() {
    local port=$1
    if lsof -Pi :$port -sTCP:LISTEN -t >/dev/null 2>&1 ; then
        return 0  # Port is in use
    else
        return 1  # Port is free
    fi
}

# Function to kill process on port
kill_port() {
    local port=$1
    local pid=$(lsof -ti:$port)
    if [ ! -z "$pid" ]; then
        echo "  → Killing process $pid on port $port..."
        kill -9 $pid 2>/dev/null || true
        sleep 1
    fi
}

# Check backend port
if check_port $BACKEND_PORT; then
    echo "${YELLOW}  ⚠ Port $BACKEND_PORT is already in use${NC}"
    read -p "  Kill the process and continue? (y/n) " -n 1 -r
    echo
    if [[ $REPLY =~ ^[Yy]$ ]]; then
        kill_port $BACKEND_PORT
        echo "${GREEN}  ✓ Port $BACKEND_PORT is now free${NC}"
    else
        echo "${RED}  ✗ Cannot start backend - port in use${NC}"
        exit 1
    fi
else
    echo "${GREEN}  ✓ Port $BACKEND_PORT is available${NC}"
fi

# Check frontend port
if check_port $FRONTEND_PORT; then
    echo "${YELLOW}  ⚠ Port $FRONTEND_PORT is already in use${NC}"
    read -p "  Kill the process and continue? (y/n) " -n 1 -r
    echo
    if [[ $REPLY =~ ^[Yy]$ ]]; then
        kill_port $FRONTEND_PORT
        echo "${GREEN}  ✓ Port $FRONTEND_PORT is now free${NC}"
    else
        echo "${RED}  ✗ Cannot start frontend - port in use${NC}"
        exit 1
    fi
else
    echo "${GREEN}  ✓ Port $FRONTEND_PORT is available${NC}"
fi

echo ""

# ============================================================================
# 7. START BACKEND SERVER
# ============================================================================

echo "${BLUE}Step 6: Starting backend server...${NC}"

cd "$PROJECT_ROOT/backend"

# Start PHP server in background
nohup php -S localhost:${BACKEND_PORT} > "${PROJECT_ROOT}/backend-server.log" 2>&1 &
BACKEND_PID=$!

# Wait a moment and check if server started
sleep 2

if ps -p $BACKEND_PID > /dev/null; then
    echo "${GREEN}✓ Backend server started on port ${BACKEND_PORT}${NC}"
    echo "  PID: $BACKEND_PID"
    echo "  Logs: ${PROJECT_ROOT}/backend-server.log"

    # Save PID for later shutdown
    echo $BACKEND_PID > "${PROJECT_ROOT}/.backend.pid"
else
    echo "${RED}✗ Failed to start backend server${NC}"
    echo "  Check ${PROJECT_ROOT}/backend-server.log for errors"
    exit 1
fi

cd "$PROJECT_ROOT"
echo ""

# ============================================================================
# 8. START FRONTEND SERVER
# ============================================================================

echo "${BLUE}Step 7: Starting frontend dev server...${NC}"

cd "$PROJECT_ROOT/frontend"

# Start Vite dev server in background
nohup npm run dev > "${PROJECT_ROOT}/frontend-server.log" 2>&1 &
FRONTEND_PID=$!

# Wait for Vite to start (it takes a bit longer)
echo "  → Waiting for Vite dev server to start..."
sleep 5

if ps -p $FRONTEND_PID > /dev/null; then
    echo "${GREEN}✓ Frontend server started on port ${FRONTEND_PORT}${NC}"
    echo "  PID: $FRONTEND_PID"
    echo "  Logs: ${PROJECT_ROOT}/frontend-server.log"

    # Save PID for later shutdown
    echo $FRONTEND_PID > "${PROJECT_ROOT}/.frontend.pid"
else
    echo "${RED}✗ Failed to start frontend server${NC}"
    echo "  Check ${PROJECT_ROOT}/frontend-server.log for errors"

    # Clean up backend server
    kill $BACKEND_PID 2>/dev/null || true
    exit 1
fi

cd "$PROJECT_ROOT"
echo ""

# ============================================================================
# 9. VERIFY SERVERS ARE RUNNING
# ============================================================================

echo "${BLUE}Step 8: Verifying servers...${NC}"

# Wait a moment for servers to fully initialize
sleep 3

# Check if backend responds
if curl -s http://localhost:${BACKEND_PORT}/server-check.php > /dev/null 2>&1; then
    echo "${GREEN}  ✓ Backend is responding${NC}"
else
    echo "${YELLOW}  ⚠ Backend may not be fully ready yet${NC}"
fi

# Check if frontend responds
if curl -s http://localhost:${FRONTEND_PORT} > /dev/null 2>&1; then
    echo "${GREEN}  ✓ Frontend is responding${NC}"
else
    echo "${YELLOW}  ⚠ Frontend may not be fully ready yet${NC}"
fi

echo ""

# ============================================================================
# 10. CREATE STOP SCRIPT
# ============================================================================

# Create a stop script for easy shutdown
cat > "${PROJECT_ROOT}/stop.sh" << 'EOF'
#!/bin/bash

# Colors
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
NC='\033[0m'

echo -e "${YELLOW}🛑 Stopping Lux Studio servers...${NC}"

PROJECT_ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"

# Stop backend
if [ -f "${PROJECT_ROOT}/.backend.pid" ]; then
    BACKEND_PID=$(cat "${PROJECT_ROOT}/.backend.pid")
    if ps -p $BACKEND_PID > /dev/null 2>&1; then
        kill $BACKEND_PID 2>/dev/null
        echo -e "${GREEN}✓ Backend server stopped (PID: $BACKEND_PID)${NC}"
    else
        echo -e "${YELLOW}⚠ Backend server not running${NC}"
    fi
    rm "${PROJECT_ROOT}/.backend.pid"
fi

# Stop frontend
if [ -f "${PROJECT_ROOT}/.frontend.pid" ]; then
    FRONTEND_PID=$(cat "${PROJECT_ROOT}/.frontend.pid")
    if ps -p $FRONTEND_PID > /dev/null 2>&1; then
        kill $FRONTEND_PID 2>/dev/null
        echo -e "${GREEN}✓ Frontend server stopped (PID: $FRONTEND_PID)${NC}"
    else
        echo -e "${YELLOW}⚠ Frontend server not running${NC}"
    fi
    rm "${PROJECT_ROOT}/.frontend.pid"
fi

# Also kill any remaining processes on the ports (cleanup)
BACKEND_PORT=$(grep -E "^BACKEND_PORT=" backend/.env 2>/dev/null | cut -d'=' -f2 | tr -d ' ')
FRONTEND_PORT=$(grep -E "^FRONTEND_PORT=" frontend/.env 2>/dev/null | cut -d'=' -f2 | tr -d ' ')

BACKEND_PORT=${BACKEND_PORT:-5015}
FRONTEND_PORT=${FRONTEND_PORT:-3000}

# Kill any remaining processes on ports
for port in $BACKEND_PORT $FRONTEND_PORT; do
    pid=$(lsof -ti:$port 2>/dev/null)
    if [ ! -z "$pid" ]; then
        kill -9 $pid 2>/dev/null || true
        echo -e "${GREEN}✓ Cleaned up process on port $port${NC}"
    fi
done

echo -e "${GREEN}✅ All servers stopped${NC}"
EOF

chmod +x "${PROJECT_ROOT}/stop.sh"

# ============================================================================
# 11. SUCCESS MESSAGE
# ============================================================================

echo "${GREEN}════════════════════════════════════════════════════════════${NC}"
echo "${GREEN}🎉 Lux Studio is Running!${NC}"
echo "${GREEN}════════════════════════════════════════════════════════════${NC}"
echo ""

echo "${BLUE}🌐 Application URLs:${NC}"
echo "  • Frontend: ${GREEN}http://localhost:${FRONTEND_PORT}${NC}"
echo "  • Backend API: ${GREEN}http://localhost:${BACKEND_PORT}${NC}"
echo ""

echo "${BLUE}📊 Server Status:${NC}"
echo "  • Backend PID: $BACKEND_PID (port $BACKEND_PORT)"
echo "  • Frontend PID: $FRONTEND_PID (port $FRONTEND_PORT)"
echo ""

echo "${BLUE}📝 Log Files:${NC}"
echo "  • Backend: ${PROJECT_ROOT}/backend-server.log"
echo "  • Frontend: ${PROJECT_ROOT}/frontend-server.log"
echo "  • View backend: ${GREEN}tail -f ${PROJECT_ROOT}/backend-server.log${NC}"
echo "  • View frontend: ${GREEN}tail -f ${PROJECT_ROOT}/frontend-server.log${NC}"
echo ""

echo "${BLUE}🛑 Stop Servers:${NC}"
echo "  ${GREEN}./stop.sh${NC}"
echo ""

echo "${BLUE}⚙️  Configuration:${NC}"
echo "  • SSO: Enabled with LOCAL credentials"
echo "  • SSO Client ID: 15c0c4e2-bac0-4564-a3a6-c2717f00a6d9 (local dev)"
echo "  • API Key: Configured in .env files"
echo ""

echo "${BLUE}📚 Documentation:${NC}"
echo "  • CLAUDE.md - Developer guide"
echo "  • MDFiles/README.md - User guide"
echo "  • MDFiles/AUTH_README.md - SSO guide"
echo ""

echo "${YELLOW}💡 Tip: Open http://localhost:${FRONTEND_PORT} in your browser!${NC}"
echo ""
echo "Happy coding! 🚀"