#!/bin/bash

for collection in */ ; do
    for size in "$collection"*/ ; do
        for image in "$size"* ; do
            if [ -f "$image" ]; then
                fileName=$(basename "$image")
                imageName="${fileName%.*}"
                hash=$(echo -n "$imageName" | sha1sum | awk '{print $1}')
                path=$(dirname "$image")/${hash:2:2}/${hash:0:2}
                mkdir -p $path
                ln -s "$image" "$fileName"
                mv $image $path/$fileName
            fi
        done
    done
done