#!/bin/bash
# Convert CRLF to LF if present (handles Windows line endings)
if command -v dos2unix >/dev/null 2>&1; then
    dos2unix "$0" 2>/dev/null || true
fi

set -e
echo "🤖 Installing Claude Code CLI..."

# Check if already installed
if command -v claude >/dev/null 2>&1; then
    echo "✅ Claude Code already installed"
    claude --version || echo "Claude Code version check failed"
    exit 0
fi

# Cross-platform home directory detection
if [[ "$OSTYPE" == "msys" || "$OSTYPE" == "cygwin" || "$OSTYPE" == "win32" ]]; then
    HOME_DIR="${USERPROFILE:-$HOME}"
    BIN_DIR="$HOME_DIR/bin"
    # Windows/WSL/Git Bash compatibility
    export NVM_DIR="$HOME_DIR/.nvm"
else
    HOME_DIR="$HOME"
    BIN_DIR="/home/coder/bin"
    export NVM_DIR="$HOME/.nvm"
fi

# Ensure npm is available
if [[ -s "$NVM_DIR/nvm.sh" ]]; then
    # Use POSIX-compatible sourcing
    . "$NVM_DIR/nvm.sh"
fi

if ! command -v npm >/dev/null 2>&1; then
    echo "❌ npm not found - Node.js installation required"
    exit 1
fi

echo "📥 Installing Claude Code globally via npm..."
npm install -g @anthropic-ai/claude

# Verify installation
if command -v claude >/dev/null 2>&1; then
    echo "✅ Claude Code installed successfully!"
    echo "🔧 Run 'claude auth login' to authenticate"
    echo "💡 Use 'claude chat' for interactive assistance"
    echo "💡 Use 'claude edit <file>' to edit files with AI"
    
    # Create helper script with proper line endings
    mkdir -p "$BIN_DIR"
    
    # Use printf instead of cat with heredoc to ensure consistent line endings
    {
        printf '#!/bin/bash\n'
        printf 'echo "🤖 Claude Code AI Assistant"\n'
        printf 'echo "=========================="\n'
        printf 'echo ""\n'
        printf 'echo "Authentication:"\n'
        printf 'echo "  claude auth login        # Authenticate with Anthropic"\n'
        printf 'echo "  claude auth logout       # Sign out"\n'
        printf 'echo "  claude auth whoami       # Check current user"\n'
        printf 'echo ""\n'
        printf 'echo "Interactive Chat:"\n'
        printf 'echo "  claude chat              # Start interactive session"\n'
        printf 'echo "  claude chat '\''question'\''   # Single question"\n'
        printf 'echo ""\n'
        printf 'echo "File Editing:"\n'
        printf 'echo "  claude edit file.py      # AI-powered file editing"\n'
        printf 'echo "  claude edit --help       # Edit command options"\n'
        printf 'echo ""\n'
        printf 'echo "Code Analysis:"\n'
        printf 'echo "  claude analyze .         # Analyze current directory"\n'
        printf 'echo "  claude review file.py    # Code review"\n'
        printf 'echo ""\n'
        printf 'echo "Project Operations:"\n'
        printf 'echo "  claude init              # Initialize Claude in project"\n'
        printf 'echo "  claude status            # Show project status"\n'
        printf 'echo ""\n'
        printf 'echo "💡 For full documentation: https://docs.anthropic.com/claude/docs"\n'
    } > "$BIN_DIR/claude-help"
    
    chmod +x "$BIN_DIR/claude-help"
    
    echo "💡 Run 'claude-help' for quick reference"
else
    echo "❌ Claude Code installation failed"
    exit 1
fi