#!/usr/bin/env bash

set -euo pipefail

export INCOMING="${INCOMING:-/data/incoming/}"
export MOVER_WORKING_DIR="${MOVER_WORKING_DIR:-/data/mover-work/}"
export UPLOAD_QUEUE="${UPLOAD_QUEUE:-/data/upload-queue/}"
export MEGABYTES_PER_CHUNK="${MEGABYTES_PER_CHUNK:-$((1024*100))}"
export BYTES_PER_CHUNK=$((1024*1024*MEGABYTES_PER_CHUNK))

mkdir -p "${MOVER_WORKING_DIR}"
mkdir -p "${UPLOAD_QUEUE}"
mkdir -p "${INCOMING}"

while [[ 1 ]] ; do
	mkdir -p "${MOVER_WORKING_DIR}/current"
	export cur_size=$( du -B1 -s "${MOVER_WORKING_DIR}/current" | grep -oE "^[0-9]+" )

	find "${INCOMING}" -type f -not -name ".*"\
	| while read -r filename
	do
		# skip partial uploads
		if [[ "${filename}" =~ rsync-tmp ]]
		then
			continue
		fi

		echo "Moving ${filename}"
		export cur_size=$((cur_size + $( du -B1 -s "${filename}" | grep -oE "^[0-9]+" )))
		mkdir -p "${MOVER_WORKING_DIR}/current"
		mv -v "${filename}" "${MOVER_WORKING_DIR}/current/"

		if [[ "${cur_size}" -gt "${BYTES_PER_CHUNK}" ]]; then
			timestamp=$( date +'%Y%m%d%H%M%S' )
			uuid=$(cat /proc/sys/kernel/random/uuid | cut -d- -f1)
			echo "Current archive is full, moving to ${timestamp}_${uuid}."
			mv "${MOVER_WORKING_DIR}/current" "${UPLOAD_QUEUE}/${timestamp}_${uuid}"
			export cur_size=0
		fi
	done

	echo "Sleeping 30 seconds..."
	sleep 30
done