#!/bin/bash

# Standardvärden
DIR="."
DRY_RUN=false

# Läs argument
for arg in "$@"; do
    case "$arg" in
        --dry-run)
            DRY_RUN=true
            ;;
        *)
            DIR="$arg"
            ;;
    esac
done

# Gå igenom alla filer i katalogen rekursivt
find "$DIR" -depth -type f | while read -r file; do
    dir=$(dirname "$file")
    base=$(basename "$file")

    # Byt ut mellanslag mot underscore
    newbase=$(echo "$base" | tr ' ' '_')

    # Byt ut flera underscores mot en enda
    newbase=$(echo "$newbase" | sed 's/_\+/_/g')

    # Om namnet har ändrats
    if [ "$base" != "$newbase" ]; then
        newpath="$dir/$newbase"
        if [ "$DRY_RUN" = true ]; then
            echo "[Dry-run] $file -> $newpath"
        else
            echo "Renaming: $file -> $newpath"
            mv -i "$file" "$newpath"
        fi
    fi
done