#!/bin/sh
set -e

num=${1:-1}

if [ -n "$DEBUG" ]; then
    PREFIX=echo
fi

for f in *.JPG *.jpg; do
    [ -f "$f" ] || continue
    title=`exiv2 pr -Pv -gXmp.photoshop.Headline "$f"` || title=''
    newname=`printf "%03i" $num`
    #newname=`exiv2 pr -Pv -gExif.Image.DateTime "$f"`
    if [ -n "$title" ]; then
	newname="$newname - $title"
    fi
    newname="$newname.jpg"
    if [ -e "$newname" ]; then
	echo "Error: new name $newname for $f already exists, aborting" >&2
	exit 1
    fi
    $PREFIX mv "$f" "$newname"
    num=$((num+1))
done