#!/usr/bin/env bash


usage() {

   echo
   [ -n  "$1" ] && echo -e "Error: $1\n"

   cat<<EOF
   Usage: $(basename $0) -d <log-file-folder>

EOF
exit 1
}


while getopts d:h opt ; do
   case $opt in
      d) LOGS_FOLDER=$OPTARG
         if [[ -z "$LOGS_FOLDER" ]] ; then
            usage "The \"-d\" flag must take one argument (logfile folder)"
         elif [[ ! -d "$LOGS_FOLDER" ]] ; then
            usage "Directory \"$LOGS_FOLDER\" does not exist"
         fi
         ;;
      h) usage ;;
   esac
done

shift `expr $OPTIND - 1`
[[ $# -eq "0" ]] || usage "Wrong number of arguments"

if [[ -z "$LOGS_FOLDER" ]] ; then
   usage "No logfile folder was given!"
fi


#Define the Archived log files location
ARCHIVE_FOLDER=${LOGS_FOLDER}/archive

mkdir -p $ARCHIVE_FOLDER

for log in $LOGS_FOLDER/* ; do

   [[ ! -f "$log" ]] && continue

   filename="$(basename $log)"
   extension="${filename##*.}"

   # - Only rotated files..
   # -
   [[ "$extension" = "log" ]] && continue
   
   timestamp=$(stat --format '%Y' $log)
   date=$(date '+%Y%m%d%H%M' --date="@${timestamp}")
   year=${date:0:4}
   month=${date:4:2}
   day=${date:6:2}
   
   mkdir -p $ARCHIVE_FOLDER/$year
   mkdir -p $ARCHIVE_FOLDER/$year/$month
   #mkdir -p $ARCHIVE_FOLDER/$year/$month/$day

   filename="${filename%.*}"

   if [[ "$extension" = "gz" ]]; then
      filename="${filename%.*}"
      [[ -f "${ARCHIVE_FOLDER}/${year}/${month}/${filename}.${year}-${month}-${day}.gz" ]] && continue

      cp $log ${ARCHIVE_FOLDER}/${year}/${month}/${filename}.${year}-${month}-${day}.gz
   else
      [[ -f "${ARCHIVE_FOLDER}/${year}/${month}/${filename}.${year}-${month}-${day}.gz" ]] && continue
      gzip -c $log > ${ARCHIVE_FOLDER}/${year}/${month}/${filename}.${year}-${month}-${day}.gz
   fi
   
   touch -t "${date}" ${ARCHIVE_FOLDER}/${year}/${month}/${filename}.${year}-${month}-${day}.gz

done

exit 0