#!/bin/bash
function setClone  {
        PRIMARY=$1
        SECONDARY=$2
        while read -r l
        do
                if echo $l | grep -Eq "^[a-zA-Z][a-zA-Z0-9-]"
                then
                        DEV=`echo $l | sed -e "s/ .*$//"`
                        MODELIST=`echo ${DEV} | sed -e "s/-/_/g"`_MODES
                        typeset -n CML=$MODELIST
                elif echo $l | grep -q "^[0-9]"
                then
                        MODE=`echo $l | sed -e "s/ .*$//"`
                        CML="$CML $MODE"
                fi
        done
        PRIMARY_LIST=`echo ${PRIMARY} | sed -e "s/-/_/g"`_MODES
        SECONDARY_LIST=`echo ${SECONDARY} | sed -e "s/-/_/g"`_MODES
        typeset -n PRIMARY_MODES=$PRIMARY_LIST
        typeset -n SECONDARY_MODES=$SECONDARY_LIST
        MODE=""
        for pm in $PRIMARY_MODES
        do
                for sm in $SECONDARY_MODES
                do
                        if [ $pm = $sm -a -z $MODE ]
                        then
                                MODE=$pm
                        fi
                done
        done
        if [ -z "$MODE" ]
        then
                echo Nessun modo comune ERRORE!
                exit 2
        else
                echo $MODE
                xrandr --output $PRIMARY --mode $MODE
                xrandr --output $SECONDARY --mode $MODE
                xrandr --output $SECONDARY --same-as $PRIMARY
        fi
}


POSITION='same-as'
if [ -n "$1" ]
then
        if [ $1 = '-l' ]
        then
                POSITION='left-of'
        fi
        if [ $1 = '-r' ]
        then
                POSITION='right-of'
        fi
fi
PRIMARY=`xrandr | grep " connected" | grep primary | sed -e "s/ .*$//"`
SECONDARY=`xrandr | grep " connected" | grep -v primary | sed -e "s/ .*$//"`

if [ $POSITION = 'same-as' ]
then
        xrandr | setClone $PRIMARY $SECONDARY
else
        xrandr --output $SECONDARY --$POSITION $PRIMARY
fi