#!/bin/bash
# Officer PTY Sidecar — systemd service setup
# Creates and enables a systemd service for the terminal PTY sidecar.
# Usage: bash scripts/setup-pty-sidecar.sh

set -euo pipefail

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

ok()   { echo -e "  ${GREEN}✓${NC} $1"; }
warn() { echo -e "  ${YELLOW}!${NC} $1"; }
skip() { echo -e "  - $1 (already set up)"; }

SERVICE_NAME="officer-pty-sidecar"
SERVICE_FILE="/etc/systemd/system/${SERVICE_NAME}.service"
SERVICE_USER="$(whoami)"
SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
PROJECT_DIR="$(dirname "$SCRIPT_DIR")"

# Use system node (not nvm) for systemd service
NODE_BIN="/usr/bin/node"

if [ ! -f "$NODE_BIN" ]; then
  fail "System Node.js not found at $NODE_BIN"
  fail "Install Node.js 22 via NodeSource:"
  fail "  curl -fsSL https://deb.nodesource.com/setup_22.x | sudo -E bash -"
  fail "  sudo apt-get install -y nodejs"
  exit 1
fi

echo ""
echo "── PTY Sidecar (systemd service) ──"
echo "  Node: $NODE_BIN ($("$NODE_BIN" -v))"

if systemctl is-active --quiet "$SERVICE_NAME" 2>/dev/null; then
  skip "$SERVICE_NAME service already running"
  exit 0
fi

sudo tee "$SERVICE_FILE" > /dev/null << EOF
[Unit]
Description=Officer PTY Sidecar
After=network.target

[Service]
Type=simple
User=$SERVICE_USER
WorkingDirectory=$PROJECT_DIR
Environment=TERMINAL_PTY_PORT=5338
ExecStart=$NODE_BIN $PROJECT_DIR/src/servers/api/terminal/pty-sidecar.mjs
Restart=on-failure
RestartSec=3

[Install]
WantedBy=multi-user.target
EOF

sudo systemctl daemon-reload
sudo systemctl enable --now "$SERVICE_NAME"

if systemctl is-active --quiet "$SERVICE_NAME"; then
  ok "$SERVICE_NAME service installed and running"
else
  warn "$SERVICE_NAME service failed to start — check 'journalctl -u $SERVICE_NAME'"
fi