#!/bin/bash

# External monitor manager:
# Profiles are hardcoded to automate connection to know setups. Using
# `--list` flag it will list all connected external monitors with
# relevant info.

MAIN="LVDS-1"

declare -A CONNECTED

while read -r port edid; do
    if [[ $port != $MAIN ]]; then
        CONNECTED+=( ["$port"]="$edid" )
    fi
done < <(xrandr --prop | awk '
    !/^[ \t]/ {
        if (port && edid) print port, edid
        port=$1
        edid=""
    }
    /[:.]/ && rec {
        sub(/.*000000fc00/, "", edid)
        edid = substr(edid, 0, 26) "0a"
        sub(/0a.*/, "", edid)
        rec=0
    }
    rec {
        sub(/[ \t]+/, "")
        edid = edid $0
    }
    /EDID.*:/ {
        rec=1
    }
')

if [ "$#" -gt 0 ] && [ "$1" == "--list" ]; then
    for i in "${!CONNECTED[@]}"
    do
        brand=$(xxd -r -p <<< "${CONNECTED[$i]}")
        echo -e "$i:\t${CONNECTED[$i]}\t($brand)"
    done
else
    ACTIVE=$(xrandr --listactivemonitors | awk '/^[ \t]/ { print $4 }')

    # Office config
    # VGA-1: 44454c4c20503233313748 (DELL P2317H)
    # DP-2:  44454c4c2055323431324d (DELL U2412M)
    PROFILE="OFFICE"
    if [[ ${CONNECTED["VGA-1"]} == "44454c4c20503233313748" ]] && [[ ${CONNECTED["DP-2"]} == "44454c4c2055323431324d" ]]; then
        if grep -qs "VGA-1" <<< "$ACTIVE"; then
            xrandr --output VGA-1 --off --output LVDS-1 --auto --output DP-2 --off
            notify-send "$PROFILE profile: OFF"
        else
            notify-send "$PROFILE profile: ON"
            xrandr --output VGA-1 --auto --rotate left --output DP-2 --auto --right-of VGA-1 --output LVDS-1 --off
        fi
        exit 0
    fi

    # Home config
    # VGA-1:  44454c4c20503232313148  (DELL P2211H)
    # DP-2:   44454c4c2055323431324d  (DELL U2412M)
    PROFILE="HOME"
    if [[ ${CONNECTED["VGA-1"]} == "44454c4c2055323431324d" ]]; then
        if grep -qs "VGA-1" <<< "$ACTIVE"; then
            xrandr --output VGA-1 --off --output LVDS-1 --auto
            notify-send "$PROFILE profile: OFF"
        else
            notify-send "$PROFILE profile: ON"
            xrandr --output VGA-1 --auto --output LVDS-1 --auto --left-of VGA-1
        fi
        exit 0
    fi

    notify-send "No matching monitor profile!"
fi