#!/bin/bash
#coding:utf8

export DISPLAY=:1
export XAUTHORITY=/run/user/1000/gdm/Xauthority

# Make a subshell
(
  # Loop until devices are present
  for ((retries=0; retries<10; retries++)); do
    # break if device is present
    xsetwacom --list devices | grep -q "Wacom Intuos BT S Pad" && break

    sleep 1
  done

  # Sleep a second to make sure additional devices are present
  sleep 1

  if ! xsetwacom --list devices | grep -q "Wacom Intuos BT S Pad"; then
    xmessage "Devices not present after timeout"
    exit 0 # Not sure if exit 1 would cause any issues
  fi

  main_screen="HEAD-0"
  bezier_args="0 20 80 100"
  positioning_mode="Absolute"

  # Maps the graphics tablet to the area of a specified screen (for multiple-screen environments).
  xsetwacom set "Wacom Intuos BT S Pen stylus" MapToOutput "$main_screen"
  xsetwacom set "Wacom Intuos BT S Pen eraser" MapToOutput "$main_screen"

  # Changes the pressure sensitivity.
  xsetwacom set "Wacom Intuos BT S Pen stylus" PressureCurve "$bezier_args"
  xsetwacom set "Wacom Intuos BT S Pen eraser" PressureCurve "$bezier_args"

  # Specifies the positioning mode ("Absolute" / "Relative")
  xsetwacom set "Wacom Intuos BT S Pen stylus" Mode "$positioning_mode"
  xsetwacom set "Wacom Intuos BT S Pen eraser" Mode "$positioning_mode"

  # Assigns actions to the tablet buttons.
  xsetwacom set "Wacom Intuos BT S Pad pad" Button 1 "key +ctrl z -ctrl"
  xsetwacom set "Wacom Intuos BT S Pad pad" Button 2 "key +ctrl +shift z -ctrl -shift"
) &

exit 0