import os
from datetime import datetime
from flask import current_app as app


def file_date_human(num):
    return datetime.fromtimestamp(
        num
    ).strftime(app.config['DATE_FORMAT'])


def file_stat(filename):
    s = os.stat(filename)
    return {
        'size': file_size_MB(s.st_size),
        'mtime': file_date_human(s.st_mtime),
        'name': os.path.basename(filename)
    }


def file_size_human(num,HTML=True):
    space = ' ' if HTML else ' '
    for x in [space + 'B', 'KB', 'MB', 'GB', 'TB']:
        if num < 1024.0:
            if x == space + 'B':
                return "%d%s%s" % (num, space, x)
            return "%3.1f%s%s" % (num, space, x)
        num /= 1024.0


def file_size_MB(num):
    return "{:,.2f}".format(num/(1024*1024))


def get_folder_size(path):
    total_size = 0
    for dirpath, dirnames, filenames in os.walk(path):
        for f in filenames:
            fp = os.path.join(dirpath, f)
            total_size += os.path.getsize(fp)
    return total_size


def get_or_none(key,d,none = None):
    if key in d:
        return d[key]
    else:
        return none