#!/usr/bin/env python3

import os
import re
import sys


def is_flac(filename):
    if len(filename) > 5 and filename[-5:].lower() == '.flac':
        return True
    return False


def fix_flac_name(filename):
    return filename[:-5].replace('_', ' ').title() + '.flac'


def fix_name(filename):
    fsplit = filename.split('.')
    ext = fsplit[-1]
    rest = ' '.join(fsplit[:-1])
    rest = re.sub(' +', ' ', rest)
    rest = rest.replace('_', ' ').title() + '.' + ext.lower()
    return rest

files = os.listdir()
for file in files:
    if is_flac(file):
        new_file = fix_flac_name(file)
        if new_file != file:
            os.rename(file, new_file)
    else:
      new_file = fix_name(file)
      if new_file != file:
        os.rename(file, new_file)