#!/bin/bash

# Deployment script for Bike Service Application
# Make sure to run this script from the project root directory

set -e  # Exit on any error

echo "🚀 Starting deployment..."

# Check if we're in the right directory
if [ ! -f "backend/artisan" ] || [ ! -f "frontend/package.json" ]; then
    echo "❌ Error: Please run this script from the project root directory"
    exit 1
fi

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

# Function to print colored output
print_status() {
    echo -e "${GREEN}[INFO]${NC} $1"
}

print_warning() {
    echo -e "${YELLOW}[WARNING]${NC} $1"
}

print_error() {
    echo -e "${RED}[ERROR]${NC} $1"
}

# Check if running on Ubuntu server
if [[ "$OSTYPE" != "linux-gnu"* ]]; then
    print_warning "This script is designed for Ubuntu servers. Some commands may not work on your system."
fi

# Check if running as root
if [[ $EUID -eq 0 ]]; then
    print_error "Please don't run this script as root. Use a regular user with sudo privileges."
    exit 1
fi

# Check if required commands exist
check_command() {
    if ! command -v $1 &> /dev/null; then
        print_error "$1 is not installed. Please install it first."
        exit 1
    fi
}

print_status "Checking required commands..."
check_command "php"
check_command "composer"
check_command "npm"
check_command "git"

# Get current branch
CURRENT_BRANCH=$(git branch --show-current)
print_status "Current branch: $CURRENT_BRANCH"

# Ask for confirmation
read -p "Do you want to deploy from branch '$CURRENT_BRANCH'? (y/N): " -n 1 -r
echo
if [[ ! $REPLY =~ ^[Yy]$ ]]; then
    print_warning "Deployment cancelled."
    exit 0
fi

# Pull latest changes
print_status "Pulling latest changes from git..."
git pull origin $CURRENT_BRANCH

# Backend deployment
print_status "Deploying Laravel backend..."
cd backend

# Install/update dependencies
print_status "Installing Composer dependencies..."
composer install --no-dev --optimize-autoloader

# Check if .env exists, if not copy from example
if [ ! -f ".env" ]; then
    print_warning ".env file not found, copying from .env.example..."
    if [ -f ".env.example" ]; then
        cp .env.example .env
        print_warning "Please configure your .env file before continuing!"
        read -p "Press Enter after configuring .env file..."
    else
        print_error ".env.example file not found!"
        exit 1
    fi
fi

# Generate key if not set
if ! grep -q "APP_KEY=base64:" .env; then
    print_status "Generating application key..."
    php artisan key:generate
fi

# Run migrations
print_status "Running database migrations..."
php artisan migrate --force

# Clear and rebuild caches
print_status "Clearing and rebuilding caches..."
php artisan config:clear
php artisan route:clear
php artisan view:clear
php artisan cache:clear

php artisan config:cache
php artisan route:cache
php artisan view:cache

# Set production environment
if ! grep -q "APP_ENV=production" .env; then
    print_status "Setting production environment..."
    sed -i 's/APP_ENV=.*/APP_ENV=production/' .env
fi

if ! grep -q "APP_DEBUG=false" .env; then
    print_status "Disabling debug mode..."
    sed -i 's/APP_DEBUG=.*/APP_DEBUG=false/' .env
fi

cd ..

# Frontend deployment
print_status "Deploying Vue.js frontend..."
cd frontend

# Install/update dependencies
print_status "Installing npm dependencies..."
npm install

# Build for production
print_status "Building frontend for production..."
npm run build

# Copy built files to Laravel public directory
print_status "Copying built files to Laravel public directory..."
if [ -d "dist" ]; then
    cp -r dist/* ../backend/public/
    print_status "Frontend files copied successfully"
else
    print_error "dist directory not found! Build may have failed."
    exit 1
fi

cd ..

# Set proper permissions
print_status "Setting proper permissions..."
if command -v sudo &> /dev/null; then
    sudo chown -R www-data:www-data backend/storage backend/bootstrap/cache
    sudo chmod -R 775 backend/storage backend/bootstrap/cache
    print_status "Permissions set successfully"
else
    print_warning "sudo not available, skipping permission changes"
fi

# Restart services (if running on server)
if command -v sudo &> /dev/null; then
    print_status "Restarting services..."
    
    # Check if services exist and restart them
    if sudo systemctl list-units --type=service | grep -q "php8.2-fpm"; then
        sudo systemctl restart php8.2-fpm
        print_status "PHP-FPM restarted"
    fi
    
    if sudo systemctl list-units --type=service | grep -q "nginx"; then
        sudo systemctl restart nginx
        print_status "Nginx restarted"
    fi
    
    if sudo systemctl list-units --type=service | grep -q "bikeservice-queue"; then
        sudo systemctl restart bikeservice-queue
        print_status "Queue worker restarted"
    fi
else
    print_warning "sudo not available, skipping service restarts"
fi

# Final checks
print_status "Running final checks..."

# Check if Laravel is working
cd backend
if php artisan --version &> /dev/null; then
    print_status "Laravel is working correctly"
else
    print_error "Laravel is not working correctly"
    exit 1
fi

# Check if frontend files are accessible
if [ -f "public/index.html" ]; then
    print_status "Frontend files are in place"
else
    print_error "Frontend files are missing"
    exit 1
fi

cd ..

echo
echo -e "${GREEN}✅ Deployment completed successfully!${NC}"
echo
echo "Next steps:"
echo "1. Test your application in the browser"
echo "2. Check application logs if there are any issues"
echo "3. Verify all features are working correctly"
echo
echo "Useful commands:"
echo "- Check Laravel logs: tail -f backend/storage/logs/laravel.log"
echo "- Check Nginx logs: sudo tail -f /var/log/nginx/error.log"
echo "- Check PHP-FPM logs: sudo tail -f /var/log/php8.2-fpm.log"
echo "- Restart all services: sudo systemctl restart nginx php8.2-fpm"