#!/bin/bash
#
set -xe

PROGRAM="$(basename $0)"

usage(){
	echo "$PROGRAM <hash>"
}

cdaw(){
	pwd > tmp_holder
}

cdaw

CURDIR="$(cat tmp_holder)"

TMPWD="/tmp/rjs"

if [ ! -d "$TMPWD" ]
then
	mkdir -p "$TMPWD"
	if [ "$?" != 0 ]
	then
		echo "Can't create $TMPWD dir"
		exit 1
	fi
fi

MAPSDIR="$WORKDIR/fmp"

CHKDIR="$WORKDIR/ftr"

cd $CHKDIR
if [ "$?" != 0 ]
then
	echo "Can't get dir"
	exit 1
fi



if [ ! -z $1 ]
then
	MAPSFILE="$1"

	echo '#!/bin/bash' > script
	
	awk '{print "cp '$CHKDIR'/"$1" '$TMPWD'/"$2" "}' $MAPSDIR/$MAPSFILE| grep chk > script

	sh script
	if [ "$?" != 0 ]
	then
		echo "Error executing copy script"
		exit 1
	fi
	rm script

	cd $TMPWD

	echo "$PWD"
	OUTPUT="$(tail -n1 $MAPSDIR/$MAPSFILE | awk '{print $2}')"

	echo $OUTPUT
	# 
	# Not sure about the line below. There is a bug persisting here from `cat` that separates with \n
	# each file
	#
	# It's said that the best way to do that is using `printf` 
	#
	# https://stackoverflow.com/questions/51332070/bash-redirect-cat-to-file-without-newline
	#
	# We will need an amount of files so we can know beforehand how many %s will be outputed (same as the number of files)
	#
	# If we'd `grep chk $MAPSDIR/$MAPSFILE | wc -l` we would get the amount, right?
	# YES!!!
	#
	# So we would put out a new script
	# TODO
    #touch newscript.sh
    #echo 'set -xe' > newscript.sh
    #echo -n "printf \"" >> newscript.sh
	#NUMBER_OF_FILES="$(grep chk $MAPSDIR/$MAPSFILE | wc -l)"
    #i=0
    #while [ "$i" -lt "$NUMBER_OF_FILES" ]
    #do
    #    i="$(expr $i + 1)"
    #    echo -n "%s" >> newscript.sh
    #done
    #echo -n "%s" >> newscript.sh
    #echo -n "\" " >> newscript.sh
    #echo -n "$(cat $MAPSDIR/$MAPSFILE | grep chk | awk '{ print "\"$(cat " $2 ")\" " }'| tr -d '\n')" >> newscript.sh
    #echo -n ' > '$OUTPUT >> newscript.sh
    #sh newscript.sh

	cat $(echo -n $(cat $MAPSDIR/$MAPSFILE|grep chk|awk '{print $2" "}'|tr -d '\n')) > $OUTPUT

	sha512sum -c $MAPSDIR/$MAPSFILE
	
	mv $OUTPUT $CURDIR

	rm -rf "$TMPWD"

	rm $CURDIR/tmp_holder
else
	usage
fi