#!/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="$AK_WORKDIR/fmp"

CHKDIR="$AK_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

    # We create a script to copy all the chunks and rename them to their serialized
    # name produced by split when we splitted the file
    awk '{print "cp '$CHKDIR'/"$1" '$TMPWD'/"$2" "}' $MAPSDIR/$MAPSFILE| grep chk >> script

    bash script

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

    cd $TMPWD

    echo "$PWD"

    # Final name we are going to rename to
    OUTPUT="$(tail -n1 $MAPSDIR/$MAPSFILE | awk '{print $2}')"

    echo $OUTPUT

    # We grep the MAPSFILE for chk filenames in lines and we print them all in
    # one line so the first `cat` will concatenate all chunks to OUTPUT
    cat $(echo -n $(cat $MAPSDIR/$MAPSFILE|grep chk|awk '{print $2" "}'|tr -d '\n')) > $OUTPUT

    # We check if everything is okay
    sha512sum -c $MAPSDIR/$MAPSFILE
    if [ "$?" != "0" ]; then
        _ak_log_error "Error while checking sums"
        exit 1
    fi

    mv $OUTPUT $CURDIR

    rm -rf "$TMPWD"

    rm $CURDIR/tmp_holder
else
    usage
fi