#!/bin/bash

# check if arguments are provided
if [ $# -ne 1 ] ; then
	echo "No arguments provided"
	exit 1
fi

# set device for adb
if [ $1 == "-lw" ] || [ $1 == "-ow" ] ; then
	DEVICE="-s localhost:4444"

elif [ $1 == "-lp" ] || [ $1 == "-op" ] ; then
	DEVICE=""

else
	echo "Arguments provided are invalid"
	exit 1
fi

# delete the old nav.log on device
adb $DEVICE shell  "rm /sdcard/nav.log 2>/dev/null" 2>/dev/null

# now run an infinite loop
while [ 0 ]
do
    # read nav.log
    adb $DEVICE pull /sdcard/nav.log 2>/dev/null

    if [ -f "nav.log" ]
    then
    	# delete nav.log on device
        adb $DEVICE shell  "rm /sdcard/nav.log 2>/dev/null" 2>/dev/null

	# read nav.log line by line
        cat nav.log 2>/dev/null| while read line
        do
            echo $line

	    # handle osx
	    if [ $1 == "-ow" ] || [ $1 == "-op" ] ; then
            	case $line in
                	l)
				echo 'tell application "System Events" to key code 123'|osascript
                    	;;
                	r)
				echo 'tell application "System Events" to key code 124'|osascript
                    	;;
                	t)
				echo 'tell application "System Events" to key code 126'|osascript
                    	;;
                	b)
				echo 'tell application "System Events" to key code 125'|osascript
                    	;;
            	esac

	    # handle for linux
	    elif [ $1 == "-lw" ] || [ $1 == "-lp" ] ; then
            	case $line in
                	l)
				xdotool key Left
                    	;;
                	r)
				xdotool key Right
                    	;;
                	t)
				xdotool key Up
                    	;;
                	b)
				xdotool key Down
                    	;;
            	esac
	    fi
        done

	# remove the local nav.log
        rm nav.log 2>/dev/null
    fi
 done