#!/usr/bin/env python3

"""
Small script to convert music files in the form:
$(tracknumber) - $(title).$(ext)
to the form
$(tracknumber) $(title).$(ext)
(note the absence of dash)
"""

import os
import re


def main() -> None:
    """
    Function that executes the script.
    """
    for root, _, files in os.walk("."):
        for filename in files:
            match = re.match(r"^(\d+) - (.+)$", filename)
            if not match:
                continue
            new_filename = f"{match[1]} {match[2]}"
            old_path = os.path.join(root, filename)
            new_path = os.path.join(root, new_filename)
            print(old_path, "->", new_path)
            os.rename(old_path, new_path)


if __name__ == "__main__":
    main()