#!/usr/bin/env bash
# Script to install Jules CLI
# Usage: bash scripts/install_jules.sh

set -euo pipefail

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

echo -e "${GREEN}Installing Jules CLI...${NC}"

# Check if npm is available
if ! command -v npm &> /dev/null; then
    echo -e "${RED}Error: npm is not installed.${NC}"
    echo "Please install Node.js and npm first."
    exit 1
fi

# Check if node is available
if ! command -v node &> /dev/null; then
    echo -e "${RED}Error: node is not installed.${NC}"
    echo "Please install Node.js first."
    exit 1
fi

# Check Node.js version (requires >= 18.0.0)
NODE_VERSION=$(node --version | cut -d'v' -f2)
MAJOR_VERSION=$(echo "$NODE_VERSION" | cut -d'.' -f1)

if [ "$MAJOR_VERSION" -lt 18 ]; then
    echo -e "${RED}Error: Node.js version 18 or higher is required.${NC}"
    echo "Current version: $NODE_VERSION"
    exit 1
fi

echo "Node.js version: $NODE_VERSION ✓"

# Install Jules CLI globally
echo "Installing @google/jules..."
if npm install -g @google/jules; then
    echo -e "${GREEN}✓ Jules CLI npm package installed successfully${NC}"
else
    echo -e "${RED}Error: Failed to install Jules CLI${NC}"
    exit 1
fi

# Check if jules command is available
if command -v jules &> /dev/null; then
    echo -e "${GREEN}✓ Jules command is available in PATH${NC}"
    echo "  Location: $(which jules)"
else
    echo -e "${RED}Error: Jules command not found in PATH${NC}"
    exit 1
fi

echo ""
echo -e "${GREEN}Jules CLI installation complete!${NC}"
echo ""
echo "Next steps:"
echo "  1. Authenticate with Google: ${YELLOW}jules login${NC}"
echo "  2. Install GitHub App for your organization (see docs/Jules_CLI_setup.md)"
echo "  3. Verify setup: ${YELLOW}jules version${NC}"
echo ""
echo -e "${YELLOW}Note:${NC} First run requires authentication and will download the Jules binary."
echo "      In CI/CD environments, use JULES_TOKEN for authentication."
echo ""