#!/usr/bin/env bash
# Install and enable the systemd user service for a NodeCG install created
# by install.sh.
#
# Usage: ./install-service.sh [install-dir]   (default: ~/venue-gfx)

set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
UNIT_NAME=nodecg-venue-gfx.service
TEMPLATE="$SCRIPT_DIR/../deploy/$UNIT_NAME"

install_dir="${1:-$HOME/venue-gfx}"
install_dir="$(cd "${install_dir/#\~/$HOME}" && pwd)"

[[ -f $install_dir/index.js ]] || {
  echo "$install_dir does not look like a NodeCG install (no index.js)" >&2
  exit 1
}

mkdir -p "$HOME/.config/systemd/user"
sed "s|__INSTALL_DIR__|$install_dir|" "$TEMPLATE" \
  > "$HOME/.config/systemd/user/$UNIT_NAME"

systemctl --user daemon-reload
systemctl --user enable --now "$UNIT_NAME"
systemctl --user status "$UNIT_NAME" --no-pager || true

cat <<EOF

Service installed and started. Useful commands:
  systemctl --user status  $UNIT_NAME
  systemctl --user restart $UNIT_NAME
  journalctl --user -u $UNIT_NAME -f

⚠ To start on boot without anyone logging in, lingering must be enabled once:
  loginctl enable-linger $USER
EOF