#! /bin/bash

usage() {
    echo "usage: focus_workspace [previous|left|right|1-42]"
}

if [ $# -ne 1 ]; then
    usage; exit 1
fi

CURRENT_OUTPUT=$(i3-msg -t get_workspaces | jq -r ".[] | select(.focused==true).output")
if [ $1 == "previous" ]; then
    NEXT_WORKSPACE=$(cat ~/.config/i3/run/previous_${CURRENT_OUTPUT})
elif [ "$1" == "left" ]; then
    NEXT_WORKSPACE=$(($(i3-msg -t get_workspaces | jq -r ".[] | select(.focused==true).num") - 1))
    [ ${NEXT_WORKSPACE} -lt 1 ] && NEXT_WORKSPACE=$(i3-msg -t get_workspaces | jq "[.[] | select(.output==\"${CURRENT_OUTPUT}\").num] | max")
elif [ "$1" == "right" ]; then
    NEXT_WORKSPACE=$(($(i3-msg -t get_workspaces | jq -r ".[] | select(.focused==true).num") + 1))
    [ ${NEXT_WORKSPACE} -gt 42 ] && NEXT_WORKSPACE=$(i3-msg -t get_workspaces | jq "[.[] | select(.output==\"${CURRENT_OUTPUT}\").num] | min")
elif [ $1 -gt 0 ] && [ $1 -lt 43 ]; then
    CURRENT_OUTPUT=$(i3-msg -t get_workspaces | jq -r ".[] | select(.num==$1).output")
    i3-msg -q "focus output ${CURRENT_OUTPUT}"
    NEXT_WORKSPACE=$1
else
    usage; exit 1
fi
CURRENT_WORKSPACE=$(i3-msg -t get_workspaces | jq ".[] | select(.focused==true).num")

i3-msg -q "workspace number ${NEXT_WORKSPACE}"
# Update previous file in run/
echo -n ${CURRENT_WORKSPACE} > ~/.config/i3/run/previous_${CURRENT_OUTPUT}