#!/usr/bin/zsh
# License: GPLv3+

RES=('1280x1024' '1920x1200')

if [[ -n ${1} ]]; then
	typeset -A RESMAP
	RESMAP=('02.150' '2'
	        '02.133' '2')
	read -A ROOM <<< $(${HOME}/bin/cipmap.sh -l|grep ${USER})
	# Note: Alter the number below such that it reflects the
	#       position of the Room-ID in the cipmap.sh output
	#       for your user; counting from right to left.
	ROOM=${ROOM[-2]}

	NEXT=${RESMAP[${ROOM}]}
	NEXT=${NEXT:-1}
else
	read -A CURRENT <<< $(grep '*' - < <(xrandr))
	CURRENT=${CURRENT[1]}

	for INDEX in {1..${#RES}}; do
		if [[ "${CURRENT}" == "${RES[${INDEX}]}" ]]; then
			if [[ ${INDEX} -lt ${#RES} ]]; then
				NEXT=$(( INDEX+1 ))
			else
				NEXT=1
			fi
			break
		fi
	done;
fi

# Try to set new resolution.
TRIES=1; RUN=1
while [[ ${TRIES} -lt 33 && ${RUN} -eq 1 ]]; do
	if xrandr -s ${RES[${NEXT}]} > /dev/null; then
		RUN=0;
	else
		print -- 'Error: Failed setting resolution!'
		print -- "       Current: ${CURRENT} - Next: ${RESOLUTIONS[${NEXT}]}"
		sleep .1
		(( TRIES++ ))
	fi
done