#!/bin/bash

# Mac Setup Script - Install Git, Node.js, and Python
# This script will install essential development tools on macOS

set -e  # Exit on any error

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

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

print_success() {
    echo -e "${GREEN}[SUCCESS]${NC} $1"
}

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

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

# Function to check if command exists
command_exists() {
    command -v "$1" >/dev/null 2>&1
}

# Function to check if running on macOS
check_macos() {
    if [[ "$OSTYPE" != "darwin"* ]]; then
        print_error "This script is designed for macOS only"
        exit 1
    fi
}

# Function to install Homebrew if not present
install_homebrew() {
    if command_exists brew; then
        print_success "Homebrew is already installed"
        print_status "Updating Homebrew..."
        brew update
    else
        print_status "Installing Homebrew..."
        /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
        
        # Add Homebrew to PATH for Apple Silicon Macs
        if [[ $(uname -m) == "arm64" ]]; then
            echo 'eval "$(/opt/homebrew/bin/brew shellenv)"' >> ~/.zprofile
            eval "$(/opt/homebrew/bin/brew shellenv)"
        fi
    fi
}

# Function to install Git
install_git() {
    if command_exists git; then
        print_success "Git is already installed: $(git --version)"
    else
        print_status "Installing Git..."
        brew install git
        print_success "Git installed successfully: $(git --version)"
    fi
}

# Function to install Node.js
install_nodejs() {
    if command_exists node; then
        print_success "Node.js is already installed: $(node --version)"
        print_status "Node.js version: $(node --version)"
        print_status "npm version: $(npm --version)"
    else
        print_status "Installing Node.js..."
        brew install node
        print_success "Node.js installed successfully: $(node --version)"
        print_status "npm version: $(npm --version)"
    fi
}

# Function to install Python
install_python() {
    if command_exists python3; then
        print_success "Python3 is already installed: $(python3 --version)"
    else
        print_status "Installing Python..."
        brew install python
        print_success "Python installed successfully: $(python3 --version)"
    fi
    
    # Check if pip is available
    if command_exists pip3; then
        print_success "pip3 is available: $(pip3 --version)"
    else
        print_warning "pip3 not found, installing..."
        python3 -m ensurepip --upgrade
    fi
}

# Function to install synchan
install_synchan() {
    local synchan_dir="$HOME/synchan"
    
    if [ -d "$synchan_dir" ]; then
        print_warning "Synchan directory already exists at $synchan_dir"
        read -p "Do you want to remove the existing directory and reinstall? [y/N]: " -n 1 -r
        echo ""
        if [[ $REPLY =~ ^[Yy]$ ]]; then
            print_status "Removing existing synchan directory..."
            rm -rf "$synchan_dir"
        else
            print_status "Skipping synchan installation"
            return 0
        fi
    fi
    
    print_status "Installing synchan from https://github.com/lancatlin/synchan..."
    
    # Check if git is available
    if ! command_exists git; then
        print_error "Git is required to install synchan. Please install Git first."
        return 1
    fi
    
    # Check if yarn is available
    if ! command_exists yarn; then
        print_status "Yarn not found, installing yarn..."
        if command_exists npm; then
            npm install -g yarn
        else
            print_error "npm is required to install yarn. Please install Node.js first."
            return 1
        fi
    fi
    
    # Clone the repository
    print_status "Cloning synchan repository..."
    if git clone https://github.com/lancatlin/synchan.git "$synchan_dir"; then
        print_success "Repository cloned successfully"
    else
        print_error "Failed to clone synchan repository"
        return 1
    fi
    
    # Navigate to the directory and install dependencies
    print_status "Installing dependencies with yarn..."
    cd "$synchan_dir"
    
    if yarn install; then
        print_success "Dependencies installed successfully"
        print_success "Synchan installed at: $synchan_dir"
        print_status "To use synchan, navigate to: cd $synchan_dir"
    else
        print_error "Failed to install dependencies with yarn"
        return 1
    fi
    
    # Return to original directory
    cd - > /dev/null
}

# Function to install additional useful tools
install_additional_tools() {
    print_status "Installing additional useful development tools..."
    
    # Install common tools
    brew install curl wget jq tree
    
    # Install development tools
    brew install --cask visual-studio-code
    brew install --cask iterm2
    
    print_success "Additional tools installed"
}

# Function to verify installations
verify_installations() {
    print_status "Verifying installations..."
    
    echo ""
    print_status "=== Installation Summary ==="
    
    if command_exists git; then
        print_success "✓ Git: $(git --version)"
    else
        print_error "✗ Git installation failed"
    fi
    
    if command_exists node; then
        print_success "✓ Node.js: $(node --version)"
        print_success "✓ npm: $(npm --version)"
    else
        print_error "✗ Node.js installation failed"
    fi
    
    if command_exists python3; then
        print_success "✓ Python3: $(python3 --version)"
        if command_exists pip3; then
            print_success "✓ pip3: $(pip3 --version)"
        fi
    else
        print_error "✗ Python3 installation failed"
    fi
    
    if command_exists brew; then
        print_success "✓ Homebrew: $(brew --version | head -n1)"
    else
        print_error "✗ Homebrew installation failed"
    fi
    
    # Check synchan installation
    if [ -d "$HOME/synchan" ]; then
        print_success "✓ Synchan: Installed at $HOME/synchan"
    else
        print_warning "⚠ Synchan: Not installed"
    fi
}

# Main execution
main() {
    print_status "Starting Mac development environment setup..."
    print_status "This script will install: Git, Node.js, Python, Homebrew, and optionally synchan"
    echo ""
    
    # Check if running on macOS
    check_macos
    
    # Install Homebrew first (required for other packages)
    install_homebrew
    
    # Install core development tools
    install_git
    install_nodejs
    install_python
    
    # Ask if user wants to install synchan
    echo ""
    read -p "Do you want to install synchan from GitHub? [y/N]: " -n 1 -r
    echo ""
    if [[ $REPLY =~ ^[Yy]$ ]]; then
        install_synchan
    fi
    
    # Ask if user wants additional tools
    echo ""
    read -p "Do you want to install additional development tools (VS Code, iTerm2, etc.)? [y/N]: " -n 1 -r
    echo ""
    if [[ $REPLY =~ ^[Yy]$ ]]; then
        install_additional_tools
    fi
    
    # Verify all installations
    verify_installations
    
    echo ""
    print_success "Setup complete! Your Mac development environment is ready."
    print_status "You may need to restart your terminal or run 'source ~/.zprofile' to use the new tools."
}

# Run main function
main "$@"