#!/bin/bash
# FOR hosts with limited disk space - move to storage server

function usage {
    echo -n "Usage: ${0}"
    echo -n " [ -A <archive_dir> (default /works/archive)]"
    echo -n " [ -T <target (default hl-storage.cvtt.vpn:/works/archive)>]"
    echo -n " [ -D <older than time criteria> (default: '2 days ago')]"
    echo
    exit 1
}

echo Starting $0 $*

# ---- D e f a u l t s
ArchiveDir=/works/archive
DateCriteria="2 days ago"
FromHost=$(hostname -s)
TargetRoot=hl-storage.cvtt.vpn:/works/archive
# ---- D e f a u l t s

# ---------------- cmdline
while getopts "A:T:D:h" opt; do
  case ${opt} in
    A )
      ArchiveDir=$OPTARG
      ;;
    T )
      TargetRoot=$OPTARG
      ;;
    D )
      DateCriteria=$OPTARG
      ;;
    h )
      usage
      ;;
    \? )
      echo "Invalid option: -$OPTARG" >&2
      usage
      ;;
    : )
      echo "Option -$OPTARG requires an argument." >&2
      usage
      ;;
  esac
done
# ---------------- cmdline

Oldest=$(date -d "${DateCriteria}" '+%Y-%m-%d %H:%M:%S')

echo "Looking for log files older than ${DateCriteria} in ${ArchiveDir}"


# 1. First, check if any matching files exist using a quick find check
if ! find "${ArchiveDir}/" -type f -not -newermt "${Oldest}" -print -quit | grep -q .; then
    echo "No files found older than ${Oldest} in ${ArchiveDir}"
    echo "Done ${0} ${*}"
    exit 0
fi

Target="${TargetRoot}/${FromHost}/"
echo "Moving files to ${Target}:"
echo "-----------------"

# 2. Safely pipe find into rsync using relative paths from the ArchiveDir base
# This completely avoids "Argument list too long" errors and handles spaces perfectly
set -x
find "${ArchiveDir}/" -type f -not -newermt "${Oldest}" -printf "%P\0" | \
    rsync -ahvv \
          -e "ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null" \
          --remove-source-files \
          --mkpath \
          --from0 \
          --files-from=- \
          "${ArchiveDir}/" \
          "${Target}"
{ set +x; } 2>/dev/null
echo Done ${0} ${*}