#!/bin/bash

# Bookmark Manager Setup Script
echo "🚀 Setting up Bookmark Manager Application..."
echo ""

# Function to check command exists
check_command() {
    if ! command -v $1 &> /dev/null; then
        echo "❌ $1 is not installed or not in PATH"
        return 1
    else
        echo "✅ $1 found: $(which $1)"
        return 0
    fi
}

# Function to check service status
check_postgres_service() {
    echo "🔍 Checking PostgreSQL service status..."
    
    # Try different ways to check PostgreSQL status
    if systemctl is-active --quiet postgresql 2>/dev/null; then
        echo "✅ PostgreSQL service is running (systemctl)"
        return 0
    elif brew services list 2>/dev/null | grep -q "postgresql.*started"; then
        echo "✅ PostgreSQL service is running (brew)"
        return 0
    elif pgrep -x postgres >/dev/null; then
        echo "✅ PostgreSQL process is running"
        return 0
    else
        echo "⚠️  PostgreSQL service may not be running"
        echo "   Try starting it with:"
        echo "   - Linux: sudo systemctl start postgresql"
        echo "   - macOS: brew services start postgresql"
        return 1
    fi
}

# Check prerequisites
echo "📋 Checking prerequisites..."
echo ""

NODE_OK=false
POSTGRES_OK=false

if check_command "node"; then
    NODE_VERSION=$(node --version)
    echo "   Version: $NODE_VERSION"
    NODE_OK=true
else
    echo "   Please install Node.js v16 or higher from https://nodejs.org/"
fi

if check_command "npm"; then
    NPM_VERSION=$(npm --version)
    echo "   Version: $NPM_VERSION"
else
    echo "   npm should come with Node.js"
fi

if check_command "psql"; then
    POSTGRES_VERSION=$(psql --version)
    echo "   Version: $POSTGRES_VERSION"
    POSTGRES_OK=true
    check_postgres_service
else
    echo "   Please install PostgreSQL from https://www.postgresql.org/download/"
fi

echo ""

if [ "$NODE_OK" = false ] || [ "$POSTGRES_OK" = false ]; then
    echo "❌ Prerequisites not met. Please install missing components and try again."
    exit 1
fi

# Navigate to backend directory
if [ ! -d "backend" ]; then
    echo "❌ Backend directory not found. Are you in the correct directory?"
    exit 1
fi

cd backend

# Install dependencies
echo "📦 Installing backend dependencies..."
if npm install; then
    echo "✅ Dependencies installed successfully"
else
    echo "❌ Failed to install dependencies"
    echo "   Try running: npm cache clean --force && npm install"
    exit 1
fi

# Check if .env file exists
if [ ! -f .env ]; then
    echo "📝 Creating environment file..."
    if cp .env.example .env; then
        echo "✅ Environment file created"
        echo ""
        echo "⚠️  IMPORTANT: You need to configure your database settings!"
        echo ""
        echo "1. Edit backend/.env file with your database credentials:"
        echo "   - DB_USER (usually 'postgres')"
        echo "   - DB_PASSWORD (your PostgreSQL password)"
        echo "   - JWT_SECRET (make it long and random)"
        echo ""
        echo "2. Create the databases:"
        echo "   psql -U postgres -c \"CREATE DATABASE bookmark_manager;\""
        echo "   psql -U postgres -c \"CREATE DATABASE bookmark_manager_test;\""
        echo ""
        echo "3. Then run: npm run db:init"
        echo ""
        echo "4. Finally start the app: npm run dev"
        echo ""
        exit 0
    else
        echo "❌ Failed to create environment file"
        exit 1
    fi
fi

# Test database connection
echo "🔍 Testing database connection..."
if npm run db:status >/dev/null 2>&1; then
    echo "✅ Database connection successful"
else
    echo "⚠️  Database connection failed"
    echo "   Please check your .env configuration"
    echo "   Run 'npm run db:diagnostics' for more details"
fi

# Initialize database
echo "🗄️  Initializing database..."
if npm run db:init; then
    echo "✅ Database initialized successfully"
else
    echo "❌ Database initialization failed"
    echo ""
    echo "Common solutions:"
    echo "1. Make sure PostgreSQL is running"
    echo "2. Check your .env file database credentials"
    echo "3. Create databases manually:"
    echo "   psql -U postgres -c \"CREATE DATABASE bookmark_manager;\""
    echo "   psql -U postgres -c \"CREATE DATABASE bookmark_manager_test;\""
    echo ""
    echo "For detailed troubleshooting, see TROUBLESHOOTING_SETUP.md"
    exit 1
fi

# Skip tests for now to avoid complexity
echo "⏭️  Skipping tests for initial setup (you can run 'npm test' later)"

echo ""
echo "🎉 Setup complete!"
echo ""
echo "To start the application:"
echo "  cd backend"
echo "  npm run dev"
echo ""
echo "Then open http://localhost:3001 in your browser"
echo ""
echo "Available commands:"
echo "  npm start          - Start production server"
echo "  npm run dev        - Start development server with auto-reload"
echo "  npm test           - Run all tests"
echo "  npm run db:status  - Check database status"
echo ""
echo "If you encounter issues, check TROUBLESHOOTING_SETUP.md"
echo ""