#!/bin/sh
# Installs or updates a Loopgate runner on this box (ADR 0137). The portal's Devices page gives the line:
#   curl -fsSL https://loopgate.dev/runner/install.sh | sh -s -- lgr_… [--url https://…] [--dir ~/loopgate]
# The runner gets a temporary address by itself; --url names a permanent one. Run again to take a
# newer compose.yaml or a fresh token; the rest of runner.env is kept.
set -eu
token="" url="" dir="$HOME/loopgate" plane="https://app.loopgate.dev" site="https://loopgate.dev"
while [ $# -gt 0 ]; do
  case "$1" in
    --url) url="$2"; shift 2 ;;
    --dir) dir="$2"; shift 2 ;;
    --control-plane) plane="$2"; shift 2 ;;
    lgr_*) token="$1"; shift ;;
    *) echo "Unknown argument: $1" >&2; exit 2 ;;
  esac
done
if ! docker compose version >/dev/null 2>&1; then
  echo "Docker with Compose is needed. Install it with: curl -fsSL https://get.docker.com | sh" >&2
  exit 1
fi
mkdir -p "$dir"
cd "$dir"
curl -fsSL "$site/runner/compose.yaml?$(date +%s)" -o compose.yaml
# A missing key is added, a given one replaced; everything else in runner.env stays as written.
set_env() {
  grep -v "^$1=" runner.env > runner.env.new || true
  echo "$1=$2" >> runner.env.new
  mv runner.env.new runner.env
}
umask 077
# The box's own name on the portal's Devices page; inside the container the hostname is the container's.
[ -f runner.env ] || { touch runner.env && set_env LOOPGATE_CONTROL_PLANE "$plane" && set_env LOOPGATE_RUNNER_NAME "$(hostname)"; }
[ -n "$token" ] && set_env LOOPGATE_INSTALL_TOKEN "$token"
[ -n "$url" ] && set_env LOOPGATE_RUNNER_URL "$url"
chmod 600 runner.env
plane=$(sed -n 's/^LOOPGATE_CONTROL_PLANE=//p' runner.env)
docker compose up -d
echo "Waiting for the runner to start and register…"
i=0
while [ $i -lt 60 ]; do
  if curl -fsS http://127.0.0.1:4311/health >/dev/null 2>&1 &&
    docker compose logs runner 2>/dev/null | grep -Eq "Registered as|Runner ready at"; then
    echo "Runner connected. Open the portal's Devices page: $plane/#/devices"
    exit 0
  fi
  i=$((i + 1))
  sleep 2
done
echo "The runner did not register within two minutes. Its last lines:" >&2
docker compose logs --tail 20 runner >&2
exit 1