#!/usr/bin/env bash

set -euo pipefail

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

log_info() { echo -e "${GREEN}$*${NC}"; }
log_warn() { echo -e "${YELLOW}$*${NC}"; }
log_err() { echo -e "${RED}$*${NC}"; }

require_cmd() {
  local cmd="$1"
  if ! command -v "$cmd" >/dev/null 2>&1; then
    log_err "ERROR: Missing required command: $cmd"
    exit 1
  fi
}

node_major_version() {
  node -v 2>/dev/null | sed 's/^v//' | cut -d. -f1
}

echo -e "${GREEN}=== OpenClaw + GitHub Copilot CLI Setup ===${NC}"
echo "Current time: $(date)"
echo ""

require_cmd curl

# Step 1: Install / verify Node.js >= 22
need_node_install=false
if ! command -v node >/dev/null 2>&1; then
  need_node_install=true
else
  node_major="$(node_major_version || true)"
  if ! echo "$node_major" | grep -Eq '^[0-9]+$' || [ "$node_major" -lt 22 ]; then
    need_node_install=true
  fi
fi

if [ "$need_node_install" = true ]; then
  log_warn "Node.js >= 22 not found. Installing via Homebrew..."
  if ! command -v brew >/dev/null 2>&1; then
    log_err "Homebrew not found. Install it first:"
    echo '/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"'
    exit 1
  fi
  brew install node
fi
log_info "Node.js ready ($(node -v))."

# Step 2: Install / verify OpenClaw
if ! command -v openclaw >/dev/null 2>&1; then
  log_warn "OpenClaw not found. Installing via npm..."
  require_cmd npm
  npm install -g openclaw
else
  log_info "OpenClaw already installed ($(openclaw --version))."
fi

# Step 3: Install / verify GitHub Copilot CLI
if ! command -v copilot >/dev/null 2>&1; then
  if command -v brew >/dev/null 2>&1; then
    log_warn "Copilot CLI not found. Installing prerelease via Homebrew..."
    brew install copilot-cli@prerelease || {
      log_warn "Homebrew install failed, falling back to npm package..."
      npm install -g @github/copilot-cli
    }
  else
    log_warn "Homebrew not found. Installing Copilot CLI via npm..."
    npm install -g @github/copilot-cli
  fi
else
  log_info "Copilot CLI already installed ($(copilot --version 2>/dev/null || echo present))."
fi

echo ""
log_info "Setup complete (Copilot-first)."
echo ""
echo "Next steps (target machine):"
echo "1. Authenticate Copilot CLI with enterprise account:"
echo "   copilot auth login"
echo "   copilot auth status"
echo "2. Start/verify OpenClaw gateway:"
echo "   openclaw gateway restart"
echo "   openclaw status --deep"
echo "3. Discover and set Copilot models:"
echo "   openclaw models refresh || true"
echo "   openclaw models list"
echo "   openclaw models set github-copilot/<your-fast-default>"
echo "4. Configure fallbacks:"
echo "   openclaw models fallbacks clear"
echo "   openclaw models fallbacks add github-copilot/<free-or-low-cost-fallback-1>"
echo "   openclaw models fallbacks add github-copilot/<free-or-low-cost-fallback-2>"
echo "5. Optional strict provider lock:"
echo "   openclaw config set --json providers.github-copilot.enabled true"
echo "   openclaw config set --json providers.openai.enabled false"
echo "   openclaw config set --json providers.anthropic.enabled false"
echo "   openclaw config set --json providers.openrouter.enabled false"
echo "6. Install Copilot guardrails (recommended):"
echo "   bash ./scripts/install_copilot_guardrails.sh"
echo "7. Ensure recommended hooks are enabled:"
echo "   openclaw hooks enable boot-md"
echo "   openclaw hooks enable command-logger"
echo "   openclaw hooks enable session-memory"