#!/bin/sh

# SPDX-FileCopyrightText: 2023 - 2025 Benjamin Grande M. S. <ben.grande.b@gmail.com>
#
# SPDX-License-Identifier: AGPL-3.0-or-later

set -eu

me="${0##*/}"

msg(){
  printf '%s\n' "${0##*/}: ${*}" >&2
}

usage(){
  msg "Usage: ${me} [QVM-RUN_OPTIONS] <QUBE>
Examples:
  ${me} --dispvm=<DVM_TEMPLATE>
  ${me} -u root <QUBE>
  ${me} <QUBE>
The desktop application can be specified with environment variable:"
  case "${me}" in
    *-terminal)
      msg "  QVM_TERMINAL=xterm ${me} -u root <QUBE>"
      ;;
    *-file-manager)
      msg "  QVM_FILE_MANAGER=thunar ${me} -u root <QUBE>"
      ;;
    *) ;;
  esac
  exit "${1-"1"}"
}

check_xtools(){
  fail=0
  if ! command -v xdotool >/dev/null; then
    msg "missing program: xdotool"
    fail=1
  fi
  if ! command -v xprop >/dev/null; then
    msg "missing program: xprop"
    fail=1
  fi
  if test "${fail}" = "1"; then
    msg "cannot determine qube by window, install missing programs or"
    msg "provide the qube name by argument"
    exit 1
  fi
}

case "${me}" in
  *-terminal) service="${QVM_TERMINAL:-"qubes-run-terminal"}";;
  *-file-manager) service="${QVM_FILE_MANAGER:-"qubes-open-file-manager"}";;
  *) msg "Invalid script name: ${me}"; exit 1 ;;
esac

case "${1-}" in
  -h|--help)
    usage 1
    ;;
  "")
    check_xtools
    ## Try to run on focused window, if Dom0 is focused, it will prompt you to
    ## select a qube window.
    id="$(xdotool getwindowfocus)"
    qube="$(xprop -id "${id}" -notype _QUBES_VMNAME | awk -F'"' '{print $2}')"
    if test -n "${qube}"; then
      exec qvm-run --service -- "${qube}" "qubes.StartApp+${service}"
    fi
    printf '%s\n' "Select a qube window ..."
    id="$(xdotool selectwindow)"
    qube="$(xprop -id "${id}" -notype _QUBES_VMNAME | awk -F'"' '{print $2}')"
    if test -n "${qube}"; then
      qvm-run --service -- "${qube}" "qubes.StartApp+${service}"
    fi
    ;;
  *)
    qvm-run --service "${@}" -- "qubes.StartApp+${service}"
    ;;
esac