#!/bin/bash

# Shattered Void MMO - Setup Script
# Automates the initial setup process for development environment

set -e  # Exit on any error

echo "🌌 Shattered Void MMO - Development Setup"
echo "========================================"

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

if ! command -v node &> /dev/null; then
    echo "❌ Node.js is not installed. Please install Node.js 16+ and try again."
    exit 1
fi

if ! command -v npm &> /dev/null; then
    echo "❌ npm is not installed. Please install npm 8+ and try again."
    exit 1
fi

if ! command -v psql &> /dev/null; then
    echo "❌ PostgreSQL client is not installed. Please install PostgreSQL and try again."
    exit 1
fi

if ! command -v redis-cli &> /dev/null; then
    echo "⚠️  Redis client not found. Make sure Redis server is running."
fi

echo "✅ Prerequisites check passed"

# Check Node.js version
NODE_VERSION=$(node --version | cut -d'v' -f2 | cut -d'.' -f1)
if [ "$NODE_VERSION" -lt 16 ]; then
    echo "❌ Node.js version $NODE_VERSION is not supported. Please upgrade to Node.js 16+"
    exit 1
fi
echo "✅ Node.js version check passed"

# Install dependencies
echo ""
echo "📦 Installing npm dependencies..."
npm install

echo "✅ Dependencies installed"

# Check for .env file
echo ""
echo "⚙️  Checking environment configuration..."
if [ ! -f ".env" ]; then
    echo "📝 Creating .env file from template..."
    cp .env.example .env
    echo "⚠️  Please edit .env file with your database credentials and configuration"
    echo "   Database settings, JWT secret, and other configurations need to be updated"
else
    echo "✅ .env file already exists"
fi

# Check database connection
echo ""
echo "🗄️  Checking database setup..."

# Load environment variables
if [ -f ".env" ]; then
    export $(grep -v '^#' .env | xargs)
fi

# Set defaults if not in .env
DB_HOST=${DB_HOST:-localhost}
DB_PORT=${DB_PORT:-5432}
DB_NAME=${DB_NAME:-shattered_void_dev}
DB_USER=${DB_USER:-postgres}

echo "Attempting to connect to database: $DB_NAME@$DB_HOST:$DB_PORT"

# Test database connection
if ! pg_isready -h "$DB_HOST" -p "$DB_PORT" -U "$DB_USER" -d "$DB_NAME" 2>/dev/null; then
    echo "❌ Cannot connect to PostgreSQL database"
    echo "   Please ensure PostgreSQL is running and the database exists"
    echo "   Run these commands to create the database:"
    echo "   sudo -u postgres psql"
    echo "   CREATE DATABASE $DB_NAME;"
    echo "   CREATE USER $DB_USER WITH PASSWORD 'your_password';"
    echo "   GRANT ALL PRIVILEGES ON DATABASE $DB_NAME TO $DB_USER;"
    echo "   \\q"
    exit 1
fi

echo "✅ Database connection successful"

# Apply database schema
echo ""
echo "🏗️  Setting up database schema..."

if psql -h "$DB_HOST" -p "$DB_PORT" -U "$DB_USER" -d "$DB_NAME" -f database-schema.sql > /dev/null 2>&1; then
    echo "✅ Database schema applied successfully"
else
    echo "❌ Failed to apply database schema"
    echo "   Please check your database credentials and permissions"
    exit 1
fi

# Run migrations
echo ""
echo "🔄 Running database migrations..."
if npm run db:migrate > /dev/null 2>&1; then
    echo "✅ Database migrations completed"
else
    echo "⚠️  Database migrations failed - this may be normal if already applied"
fi

# Run seeds
echo ""
echo "🌱 Seeding initial data..."
if npm run db:seed > /dev/null 2>&1; then
    echo "✅ Initial data seeded successfully"
else
    echo "❌ Failed to seed initial data"
    echo "   You may need to run: npm run db:seed manually"
fi

# Test Redis connection
echo ""
echo "📡 Testing Redis connection..."
REDIS_HOST=${REDIS_HOST:-localhost}
REDIS_PORT=${REDIS_PORT:-6379}

if redis-cli -h "$REDIS_HOST" -p "$REDIS_PORT" ping > /dev/null 2>&1; then
    echo "✅ Redis connection successful"
else
    echo "⚠️  Redis connection failed"
    echo "   Redis is optional but recommended for production"
    echo "   Install and start Redis server for optimal performance"
fi

# Create logs directory
echo ""
echo "📝 Setting up logging..."
mkdir -p logs
touch logs/combined.log
touch logs/error.log
echo "✅ Log directory created"

# Run linting
echo ""
echo "🔍 Running code quality checks..."
if npm run lint:check > /dev/null 2>&1; then
    echo "✅ Code quality checks passed"
else
    echo "⚠️  Code quality issues found - run 'npm run lint' to fix"
fi

# Final setup complete
echo ""
echo "🎉 Setup completed successfully!"
echo ""
echo "Next steps:"
echo "1. Review and update the .env file with your configuration"
echo "2. Start the development server: npm run dev"
echo "3. Visit http://localhost:3000 to verify the server is running"
echo ""
echo "Development commands:"
echo "  npm run dev      - Start development server with hot reload"
echo "  npm test         - Run test suite"
echo "  npm run lint     - Check and fix code style"
echo ""
echo "For more information, see README.md"
echo ""
echo "🌌 Welcome to Shattered Void MMO development!"