#!/bin/bash

### Configuration
LID="/proc/acpi/button/lid/LID"                  # lid status path
SPOOL_FILE="/var/spool/rotate-screen/rotation"   # 'rotate-screen' command run-file
###


ROTATED=0
while inotifywait "$SPOOL_FILE"; do
    # get current rotation state from run file if it exists
    DISPLAY="$(cat $SPOOL_FILE | cut -d' ' -f2)"
    XAUTH="$(cat $SPOOL_FILE | cut -d' ' -f3)"
    ROTATION="$(XAUTHORITY=$XAUTH DISPLAY=$DISPLAY xrandr --query --verbose | grep " connected" | cut -d' ' -f5)"
    LID_STATE="$(cat $LID/state | awk '{print $2}')"
    HIBERNATING=$(ps aux | grep '[h]ibernate')

    if [ $ROTATED = 0 -a x"$LID_STATE" = x"closed" -a ! x"$ROTATION" = x"normal" -a x"$HIBERNATING" = x ]; then
	# commands to run when transitionaing to tablet mode
	ln -sf ~/.xmonad/xmonad-tablet.hs ~/.xmonad/xmonad.hs
	ln -sf ~/.xmonad/xmonad-tablet-i386-linux ~/.xmonad/xmonad-i386-linux
	xmonad --restart
	ROTATED=1

    elif [ $ROTATED = 1 -a x"$LID_STATE" = x"open" -a x"$ROTATION" = x"normal" ]; then
	# commands to run when transitionaing to laptop mode
    	dzen-pager stop
	ln -sf ~/.xmonad/xmonad-laptop.hs ~/.xmonad/xmonad.hs
	ln -sf ~/.xmonad/xmonad-laptop-i386-linux ~/.xmonad/xmonad-i386-linux
	xmonad --restart
	ROTATED=0
    fi

done