#!/bin/bash
# ============================================================
# Node.js v20.18.0 riscv64 - Installation Script
# Usage: sudo bash install.sh
# ============================================================

set -e

RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
NC='\033[0m'

info()  { echo -e "${GREEN}[INFO]${NC} $1"; }
warn()  { echo -e "${YELLOW}[WARN]${NC} $1"; }
error() { echo -e "${RED}[ERROR]${NC} $1"; exit 1; }

if [ "$EUID" -ne 0 ]; then
  error "Please run as root: sudo bash install.sh"
fi

SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
INSTALL_PREFIX="/usr/local"

info "Installing Node.js v20.18.0 to $INSTALL_PREFIX..."

# Backup existing node
if command -v node &>/dev/null; then
  OLD_VER=$(node --version 2>/dev/null || echo "unknown")
  warn "Existing Node.js found: $OLD_VER"
  warn "Backing up to /usr/local/bin/node.backup"
  cp "$(which node)" /usr/local/bin/node.backup 2>/dev/null || true
fi

# Copy binaries
info "Copying binaries..."
cp "$SCRIPT_DIR/bin/node" "$INSTALL_PREFIX/bin/node"
chmod +x "$INSTALL_PREFIX/bin/node"

# Copy npm/npx if available
for bin in npm npx; do
  if [ -f "$SCRIPT_DIR/bin/$bin" ]; then
    cp "$SCRIPT_DIR/bin/$bin" "$INSTALL_PREFIX/bin/$bin"
    chmod +x "$INSTALL_PREFIX/bin/$bin"
  fi
done

# Copy lib directory if available
if [ -d "$SCRIPT_DIR/lib" ]; then
  info "Copying libraries..."
  mkdir -p "$INSTALL_PREFIX/lib"
  cp -r "$SCRIPT_DIR/lib/"* "$INSTALL_PREFIX/lib/" 2>/dev/null || true
fi

# Verify installation
info "Verifying installation..."
INSTALLED_VER=$("$INSTALL_PREFIX/bin/node" --version 2>/dev/null)
if [ -n "$INSTALLED_VER" ]; then
  info "✅ Node.js $INSTALLED_VER installed successfully!"
else
  error "Installation verification failed"
fi

echo ""
echo -e "${GREEN}============================================${NC}"
echo -e "  Node.js $INSTALLED_VER installed!"
echo -e "  Path: $INSTALL_PREFIX/bin/node"
echo -e "${GREEN}============================================${NC}"
echo ""