#!/bin/sh

screens=$(xrandr -q | awk '/ connected/ {print $1}')

grae() {
    external=$(echo "$screens" | dmenu -i -w 320 -p "Optimize resolution for: ")
    internal=$(echo "$screens" | grep -v "$external")

    res_external=$(xrandr --query | sed -n "/^$external/,/\+/p" | tail -n 1 | awk '{print $1}')
    res_internal=$(xrandr --query | sed -n "/^$internal/,/\+/p" | tail -n 1 | awk '{print $1}')

    res_ext_x=$(echo "$res_external" | sed 's/x.*//')
    res_ext_y=$(echo "$res_external" | sed 's/.*x//')
    res_int_x=$(echo "$res_internal" | sed 's/x.*//')
    res_int_y=$(echo "$res_internal" | sed 's/.*x//')

    scale_x=$(echo "$res_ext_x / $res_int_x" | bc -l)
    scale_y=$(echo "$res_ext_y / $res_int_y" | bc -l)

    xrandr --output "$external" --auto --scale 1.0x1.0 --output "$internal" --auto --same-as "$external" --scale "$scale_x"x"$scale_y"

    if [ -e /tmp/bspwm_0_0-socket ]; then
        bspc monitor -d 1 2 3 4 5 6 7 8 9 10
        bspc rule -a Firefox:Navigator state=tiled, desktop='^2'
    fi
}

grae