#!/bin/bash
# FunMC Relay Server - Ubuntu Deployment Script
# Usage: bash install.sh [master|worker]

set -e

MODE=${1:-master}
INSTALL_DIR="/opt/funmc"
NODE_NAME=${2:-"relay-node-1"}

echo "=========================================="
echo "  FunMC Relay Server Installer"
echo "  Mode: $MODE"
echo "=========================================="

# Check if running as root
if [ "$EUID" -ne 0 ]; then
  echo "Please run as root (sudo bash install.sh)"
  exit 1
fi

# Install Node.js if not present
if ! command -v node &> /dev/null; then
  echo "[1/6] Installing Node.js 20.x..."
  curl -fsSL https://deb.nodesource.com/setup_20.x | bash -
  apt-get install -y nodejs
else
  echo "[1/6] Node.js already installed: $(node -v)"
fi

# Create installation directory
echo "[2/6] Creating installation directory..."
mkdir -p $INSTALL_DIR
mkdir -p $INSTALL_DIR/logs

# Copy server files
echo "[3/6] Copying server files..."
cp -r server/* $INSTALL_DIR/

# Install dependencies
echo "[4/6] Installing dependencies..."
cd $INSTALL_DIR
npm install --production
npm run build

# Create .env file
echo "[5/6] Creating configuration..."
if [ "$MODE" = "master" ]; then
cat > $INSTALL_DIR/.env << EOF
RELAY_PORT=25565
API_PORT=3000
NODE_NAME=$NODE_NAME
IS_MASTER=true
SECRET=$(openssl rand -hex 16)
MAX_ROOMS=100
MAX_PLAYERS_PER_ROOM=20
HEARTBEAT_INTERVAL=10000
LOG_LEVEL=info
PUBLIC_HOST=0.0.0.0
EOF
else
  read -p "Enter master node URL (e.g. http://master-ip:3000): " MASTER_URL
cat > $INSTALL_DIR/.env << EOF
RELAY_PORT=25565
API_PORT=3000
NODE_NAME=$NODE_NAME
IS_MASTER=false
MASTER_URL=$MASTER_URL
SECRET=your-secret-key
MAX_ROOMS=100
MAX_PLAYERS_PER_ROOM=20
HEARTBEAT_INTERVAL=10000
LOG_LEVEL=info
PUBLIC_HOST=$(hostname -I | awk '{print $1}')
EOF
fi

# Create systemd service
echo "[6/6] Creating systemd service..."
cat > /etc/systemd/system/funmc.service << EOF
[Unit]
Description=FunMC Minecraft Relay Server
After=network.target

[Service]
Type=simple
User=root
WorkingDirectory=$INSTALL_DIR
ExecStart=/usr/bin/node dist/index.js
Restart=always
RestartSec=5
Environment=NODE_ENV=production

[Install]
WantedBy=multi-user.target
EOF

systemctl daemon-reload
systemctl enable funmc
systemctl start funmc

echo ""
echo "=========================================="
echo "  FunMC Relay Server Installed!"
echo "=========================================="
echo "  Mode: $MODE"
echo "  Install Dir: $INSTALL_DIR"
echo "  Relay Port: 25565"
echo "  API Port: 3000"
echo ""
echo "  Commands:"
echo "    systemctl status funmc    - Check status"
echo "    systemctl restart funmc   - Restart"
echo "    systemctl stop funmc      - Stop"
echo "    journalctl -u funmc -f    - View logs"
echo ""
echo "  Web UI: http://$(hostname -I | awk '{print $1}'):3000"
echo "=========================================="