#!/bin/bash

# ChatRTC Signaling Server Startup Script

set -e

SERVER_DIR="/home/ale/projects/android/chatrtc/server"
LOG_FILE="$SERVER_DIR/logs/startup.log"

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

# Create logs directory if it doesn't exist
mkdir -p "$SERVER_DIR/logs"

echo -e "${BLUE}🚀 ChatRTC Signaling Server${NC}"
echo -e "${BLUE}================================${NC}"

# Function to print colored messages
print_status() {
    echo -e "${GREEN}✅ $1${NC}"
}

print_warning() {
    echo -e "${YELLOW}⚠️  $1${NC}"
}

print_error() {
    echo -e "${RED}❌ $1${NC}"
}

print_info() {
    echo -e "${BLUE}ℹ️  $1${NC}"
}

# Check if Node.js is installed
if ! command -v node &> /dev/null; then
    print_error "Node.js is not installed. Please install Node.js 16 or later."
    exit 1
fi

# Check Node.js version
NODE_VERSION=$(node --version | cut -d'.' -f1 | cut -d'v' -f2)
if [ "$NODE_VERSION" -lt 16 ]; then
    print_warning "Node.js version is $NODE_VERSION. Recommended version is 16 or later."
fi

# Check if npm is installed
if ! command -v npm &> /dev/null; then
    print_error "npm is not installed. Please install npm."
    exit 1
fi

# Change to server directory
cd "$SERVER_DIR"

print_info "Working directory: $SERVER_DIR"

# Check if package.json exists
if [ ! -f "package.json" ]; then
    print_error "package.json not found. Make sure you're in the correct directory."
    exit 1
fi

# Install dependencies if node_modules doesn't exist
if [ ! -d "node_modules" ]; then
    print_info "Installing dependencies..."
    npm install
    print_status "Dependencies installed"
else
    print_status "Dependencies already installed"
fi

# Create .env file if it doesn't exist
if [ ! -f ".env" ]; then
    print_info "Creating .env file from template..."
    cp .env.example .env
    print_status ".env file created"
fi

# Get the local IP address
if command -v hostname &> /dev/null; then
    LOCAL_IP=$(hostname -I | awk '{print $1}')
else
    LOCAL_IP="localhost"
fi

# Function to start server
start_server() {
    local MODE=$1
    
    print_info "Starting server in $MODE mode..."
    
    case $MODE in
        "dev")
            npm run dev
            ;;
        "prod")
            npm start
            ;;
        "pm2")
            if ! command -v pm2 &> /dev/null; then
                print_warning "PM2 not installed. Installing PM2..."
                npm install -g pm2
            fi
            npm run pm2:start
            print_status "Server started with PM2"
            echo
            print_info "Useful PM2 commands:"
            echo "  pm2 status           - Check server status"
            echo "  pm2 logs chatrtc-server - View logs"
            echo "  pm2 restart chatrtc-server - Restart server"
            echo "  pm2 stop chatrtc-server - Stop server"
            ;;
        *)
            print_error "Invalid mode. Use: dev, prod, or pm2"
            exit 1
            ;;
    esac
}

# Function to test server
test_server() {
    local SERVER_URL=${1:-"http://localhost:3000"}
    
    print_info "Testing server at $SERVER_URL..."
    
    if [ -f "test-client.js" ]; then
        node test-client.js "$SERVER_URL"
    else
        print_warning "test-client.js not found. Skipping server test."
    fi
}

# Function to show server info
show_info() {
    local PORT=${PORT:-3000}
    
    echo
    print_status "Server Information:"
    echo "  📍 Local URL: http://localhost:$PORT"
    echo "  🌐 Network URL: http://$LOCAL_IP:$PORT"
    echo "  📱 Android Emulator URL: http://10.0.2.2:$PORT"
    echo
    print_info "Update your Android app's WebRTCManager.java:"
    echo "  private static final String SIGNALING_SERVER_URL = \"http://$LOCAL_IP:$PORT\";"
    echo
    print_info "Available endpoints:"
    echo "  GET  /              - Server status page"
    echo "  GET  /api/status    - Server statistics"
    echo "  GET  /api/rooms     - Active rooms"
    echo "  GET  /health        - Health check"
    echo
}

# Function to show usage
show_usage() {
    echo "Usage: $0 [COMMAND] [OPTIONS]"
    echo
    echo "Commands:"
    echo "  start [dev|prod|pm2]  - Start the server (default: dev)"
    echo "  test [URL]           - Test server connection"
    echo "  info                 - Show server information"
    echo "  stop                 - Stop PM2 server"
    echo "  logs                 - Show PM2 logs"
    echo "  status               - Show PM2 status"
    echo
    echo "Examples:"
    echo "  $0 start dev         - Start in development mode"
    echo "  $0 start pm2         - Start with PM2 process manager"
    echo "  $0 test              - Test local server"
    echo "  $0 info              - Show connection information"
}

# Parse command line arguments
case ${1:-start} in
    "start")
        MODE=${2:-dev}
        show_info
        start_server "$MODE"
        ;;
    "test")
        test_server "$2"
        ;;
    "info")
        show_info
        ;;
    "stop")
        if command -v pm2 &> /dev/null; then
            pm2 stop chatrtc-server
            print_status "Server stopped"
        else
            print_error "PM2 not installed"
        fi
        ;;
    "logs")
        if command -v pm2 &> /dev/null; then
            pm2 logs chatrtc-server
        else
            print_error "PM2 not installed"
        fi
        ;;
    "status")
        if command -v pm2 &> /dev/null; then
            pm2 status chatrtc-server
        else
            print_error "PM2 not installed"
        fi
        ;;
    "help"|"-h"|"--help")
        show_usage
        ;;
    *)
        print_error "Unknown command: $1"
        show_usage
        exit 1
        ;;
esac