#!/usr/bin/env bash

run_directory=$(dirname $(readlink -f "$0"))
user=$(whoami)

if [ -f $run_directory/.disabled ]; then
  echo "Installation is disabled. Exiting..."
  exit 0
fi

if [[ $user != 'root' ]]; then
  sudo="sudo"
else
  sudo=""
fi

if [ -x /usr/bin/apt-get ]; then
  echo "APT detected, copying Systemd unit to system directory, using APT template..."
  $sudo cp $run_directory/systemd-templates/packages-upgrade-apt.service /etc/systemd/system/packages-upgrade.service
elif [ -x /usr/bin/pacman ]; then
  echo "Pacman detected, copying Systemd unit to system directory, using Pacman template..."
  $sudo cp $run_directory/systemd-templates/packages-upgrade-pacman.service /etc/systemd/system/packages-upgrade.service
else
  echo "No supported package manager found. Only APT and Pacman are currently supported. Exiting..."
  exit 1
fi
$sudo cp $run_directory/systemd-templates/packages-upgrade.timer /etc/systemd/system/packages-upgrade.timer

echo "Reloading Systemd..."
$sudo systemctl daemon-reload

echo "Enabling timer (not starting it, either do it manually or reboot)..."
$sudo systemctl enable packages-upgrade.timer

echo "Finished install. Exiting..."
exit 0