#!/bin/bash
src_dir=$1
cd "$src_dir" || { echo "Directory not found: $src_dir"; exit 1; }

# Find all files and move them to the root directory
find . -type f -exec sh -c '
    for file_path do
        file_name=$(basename "$file_path")
        target_file="./$file_name"
        if [[ "$file_path" != "$target_file" ]]; then
            if [ -e "$target_file" ]; then
                count=1
                while [ -e "./$file_name.$count" ]; do
                    count=$((count + 1))
                done
                target_file="./$file_name.$count"
            fi
            mv "$file_path" "$target_file"
        fi
    done
' sh {} +

echo "Flattening completed."