#!/bin/bash
################################
# Written by Jeremy Green
# http://www.rhythmandcode.com/
################################
function makeFullName(){
    FULLNUM=''
    if [ $1 -lt 10 ]; then
	FULLNUM='000'${1}
    elif [ $1 -lt 100 ]; then
	FULLNUM='00'${1}
    elif [ $1 -lt 1000 ]; then
	FULLNUM='0'${1}
    else
	FULLNUM=${1}
    fi 
 
}


DIR=.
DEST='date'

if [ $# -eq 0 ]; then
    echo "Usage : hdr_dir_watcher.sh setsize [destination_dir watch_dir]"
    exit 0;
fi



SETSIZE=3
if [ $# -ge 1 ]; then
    echo "set size: $1"
    SETSIZE=$1
fi

DIR=.
DEST=.

if [ $# -ge 2 ]; then
  echo "moving to custom dir: $2"
  DEST=$2
fi

if [ $# -ge 3 ]; then
  echo "watching custom dir: $3"
  DIR=$3
fi




CHECK_INTERVAL=1.0
DATESTRING=$(date +%Y_%m_%d)

if [ $DEST = 'date' ]; then
    DEST=../$DATESTRING
fi




DIRNUM=1

cd $DIR
#CURDIR=pwd
#echo "watching $CURDIR"
echo "hit ctl-c to end"


while true 
do
  sleep $CHECK_INTERVAL
  FILECOUNT=$( find ./ -maxdepth 1 -type f  | wc -l )
  let "FILEMOD=$FILECOUNT % $SETSIZE"
  if [ "$FILEMOD" -eq 0 ]; then

      if [ ! -d $DEST ];then
	  mkdir $DEST
      fi

      while [ $( find ./ -maxdepth 1 -type f | wc -l ) -ge $SETSIZE ]
      do
	DIREXISTS=true
	while $DIREXISTS
	do
	    makeFullName $DIRNUM 
	    if [ -d $DEST/$FULLNUM ]; then
		((DIRNUM++))
	    else
		DIREXISTS=false
	    fi
	done
	

	mkdir $DEST/$FULLNUM
	#echo $(ls -1 *.* | wc -l)
	echo $FULLNUM
	IMGNUM=0;
	for img in $( find ./ -maxdepth 1 -type f | sort -n )
	do
	  if [ $IMGNUM -lt $SETSIZE ];then
	      mv $img $DEST/$FULLNUM
	      echo "moved $img to $DEST/$FULLNUM (ctl-c to end)"
	      ((IMGNUM++));
	  fi
	done
	((DIRNUM++));
		      
      done
  fi

done