#!/usr/bin/env python3
# -*- coding:utf-8 -*-
import os
import glob
from pathlib import Path

def increment_name(path):
    "increase save directory's id"
    path = Path(path)
    sep = ''
    if path.exists():
        path, suffix = (path.with_suffix(''), path.suffix) if path.is_file() else (path, '')
        for n in range(1, 9999):
            p = f'{path}{sep}{n}{suffix}'
            if not os.path.exists(p):
                break
        path = Path(p)
    return path


def find_latest_checkpoint(search_dir='.'):
    # Find the most recent saved checkpoint in search_dir
    checkpoint_list = glob.glob(f'{search_dir}/**/last*.pt', recursive=True)
    return max(checkpoint_list, key=os.path.getctime) if checkpoint_list else ''