#!/bin/sh
# Installs the usher systemd user service for crash recovery.
# This is optional — in normal operation, LibreWolf manages usher's
# lifecycle via Native Messaging. This service ensures usher is
# available for pre-LibreWolf power monitoring and restarts on crash.
#
# POSIX sh. No sudo required (user-level systemd unit).

set -eu

SCRIPT_DIR=$(cd "$(dirname "$0")" && pwd)
PROJECT_ROOT=$(cd "${SCRIPT_DIR}/.." && pwd)
SERVICE_SRC="${PROJECT_ROOT}/scripts/vestibule-usher.service"
SERVICE_DST="${HOME}/.config/systemd/user/vestibule-usher.service"

if [ ! -x "${HOME}/.local/bin/usher" ]; then
  echo "error: usher not installed at ~/.local/bin/usher" >&2
  echo "       run install-native-host.sh first" >&2
  exit 1
fi

mkdir -p "$(dirname "${SERVICE_DST}")"

# Substitute %h with the actual home directory (systemd user units
# support %h natively, but some older versions don't — do it explicitly)
sed "s|%h|${HOME}|g" "${SERVICE_SRC}" > "${SERVICE_DST}"
echo "installed: ${SERVICE_DST}"

systemctl --user daemon-reload
systemctl --user enable vestibule-usher.service
echo "enabled: vestibule-usher.service"

echo
echo "To start now:  systemctl --user start vestibule-usher.service"
echo "To check:      systemctl --user status vestibule-usher.service"
echo "To view logs:  journalctl --user -u vestibule-usher.service -f"