#!/bin/sh
# Rests the instance's heavy sidecars during the CI runner's nightly window and starts them
# again after it (ADR 0039, D6): `night.sh stop` at 01:55, `night.sh start` at 05:00, as
# deploy, from deploy/runner/'s halkyon-night and halkyon-morning units. Caddy, PostgreSQL
# and the apps' servers keep serving through the night, so people sign in and sync;
# Jellyfin, LanguageTool, the dictionaries, routes, map tiles and place search, with their
# refreshers, wait until the morning. Only those .env switches on; a deploy in between
# starts them with the rest, which is harmless.
set -eu

# Every service that takes memory or builds data, by its compose name.
heavy="jellyfin languagetool dictionaries brouter brouter-segments map-tiles map-tiles-refresh photon photon-data"

cd "$(dirname "$0")"
action=${1:-}
case $action in
  stop | start) ;;
  *)
    echo "usage: $0 stop|start" >&2
    exit 2
    ;;
esac

on=$(docker compose config --services)
services=
for service in $heavy; do
  if printf '%s\n' "$on" | grep -qx "$service"; then
    services="$services $service"
  fi
done
if [ -z "$services" ]; then
  echo "No heavy sidecar is switched on."
  exit 0
fi
# shellcheck disable=SC2086 # one service a word
docker compose "$action" $services
echo "night.sh $action:$services"