#!/bin/bash
NOEXIF='no_exif'
MD5MATCH='md5_collision'
DUPLICATE='duplicate'

md5compare() {
  file1md5=$(md5sum "$1" | awk '{print $1}')
  file2md5=$(md5sum "$2" | awk '{print $1}')
  if [ "$file1md5" == "$file2md5" ]; then
    echo "md5 clash"
    mv $2 $MD5MATCH/$2
  else
    return 1
  fi
}

if [ ! -d $MD5MATCH ]
  then
    mkdir $MD5MATCH
fi

if [ ! -d $NOEXIF ]
  then
    mkdir $NOEXIF
fi

if [ ! -d $DUPLICATE ]
  then
    mkdir $DUPLICATE
fi

for file in *.JPG *.jpeg *.JPEG; do
    mv "$file" "$(basename "$file" .JPG).jpg"
done

#for f in *.jpg *.jpeg *.JPG *.png
for f in *.jpg
do
    #if ext = jpeg JPG jpg name = jpg
    folder="$(exiftool -d "%Y-%m" -CreateDate "$f" | awk '{print $4}')"
    filename="$(exiftool -d "%Y-%m-%d_%H-%M-%S" -CreateDate "$f" | awk '{print $4".jpg"}')"
    echo $f

    if [[ -n $folder ]]
      then
        if [[ ! -d $folder ]]; then
          echo "new date folder"
          mkdir $folder
        fi

        if [[ ! -f $folder/$filename ]]
          then
            echo $folder/$filename
            mv "$f" "$folder/$filename"
          else
            if ! md5compare "$folder/$filename" "$f"; then
              echo $DUPLICATE/$folder/$filename
              mv "$f" "$DUPLICATE/$f"
            fi
        fi
      else
        echo "move to noexif"
        mv "$f" "$NOEXIF/$f"
    fi
done
echo "finished"