#!/bin/bash

ACTION=${1:-MAIN}
ARCHIVE=${2:-/srv/Shared/BrowserExtensions/archive}

LOGDIR=$ARCHIVE/log/`date --utc +"%Y-%m"`
mkdir -p $LOGDIR
LOGPREFIX=$LOGDIR/`date --utc --iso-8601=ns | sed -e 's/:/_/g' -e 's/,/./'`
LOG=${3:-$LOGPREFIX-maintain-archive-$ACTION.log} 

SELF=$0
SRC=$4

next_generation(){
    local src=$1
    local filebase=`basename $src .tar`
    local dir=`dirname $src`

    # Check next free file name:
    if ls $dir/$filebase.[0-9][0-9][0-9].tar.xz &> /dev/null; then
        latest=`ls $dir/$filebase.[0-9][0-9][0-9].tar.xz | \
                sort -r | head -1 | \
                sed -e "s/.*\([0-9][0-9][0-9]\).tar.xz/\1/"`
        next=`printf %03d $((latest+1))`
    else
        next=000
    fi

    dest=$dir/$filebase.$next.tar
    echo "Processing: $src -> $dest" | tee -a $LOG
    mv -n $src $dest
    if [ ! -f $src ]; then
        tar -cf $src -T /dev/null
        if [ ! -f $src ]; then
            echo "ERROR: cannot create empty tar archive ($src)" | tee -a $LOG
        fi
    else
         echo "ERROR: old archive exists ($src)" | tee -a $LOG
    fi
}

zge_compress(){
    mkdir -p $LOG.dir
    find $ARCHIVE/data/ \
	 -type d \
         -name "[a-p][a-p][a-p]" \
         -exec qsub -o  $LOG.dir `dirname $SELF`/xz.sge {} \;
}

main(){
    find $ARCHIVE/data/ \
         -name "[a-p][a-p][a-p][a-p][a-p][a-p][a-p][a-p][a-p][a-p][a-p][a-p][a-p][a-p][a-p][a-p][a-p][a-p][a-p][a-p][a-p][a-p][a-p][a-p][a-p][a-p][a-p][a-p][a-p][a-p][a-p][a-p].tar" \
         -exec $SELF MOVE $ARCHIVE $LOG {} \;
}

case "$ACTION" in
    MAIN)
        main;;
    MOVE)
        next_generation $SRC;;
    COMPRESS)
       zge_compress;;
esac