#!/usr/bin/env python3

import time
import os
from datetime import datetime

import constants


def timestamp() -> str:
    t = datetime.fromtimestamp(time.time())
    return t.strftime("%d/%b/%Y:%H:%M:%S%Z")


def describe_age_of_file(filename) -> str:
    try:
        now = time.time()
        ts = os.stat(filename).st_ctime
        age = now - ts
        return describe_duration(age)
    except Exception as e:
        return "?????"


def describe_age_of_file_briefly(filename) -> str:
    try:
        now = time.time()
        ts = os.stat(filename).st_ctime
        age = now - ts
        return describe_duration_briefly(age)
    except Exception as e:
        return "?????"


def describe_duration(age: int) -> str:
    days = divmod(age, constants.seconds_per_day)
    hours = divmod(days[1], constants.seconds_per_hour)
    minutes = divmod(hours[1], constants.seconds_per_minute)

    descr = ""
    if days[0] > 1:
        descr = f"{int(days[0]):d} days, "
    elif days[0] == 1:
        descr = "1 day, "
    if hours[0] > 1:
        descr = descr + f"{int(hours[0]):d} hours, "
    elif hours[0] == 1:
        descr = descr + "1 hour, "
    if len(descr) > 0:
        descr = descr + "and "
    if minutes[0] == 1:
        descr = descr + "1 minute"
    else:
        descr = descr + f"{int(minutes[0]):d} minutes"
    return descr


def describe_duration_briefly(age: int) -> str:
    days = divmod(age, constants.seconds_per_day)
    hours = divmod(days[1], constants.seconds_per_hour)
    minutes = divmod(hours[1], constants.seconds_per_minute)

    descr = ""
    if days[0] > 0:
        descr = f"{int(days[0]):d}d "
    if hours[0] > 0:
        descr = descr + f"{int(hours[0]):d}h "
    descr = descr + f"{int(minutes[0]):d}m"
    return descr


# x = describe_age_of_file_briefly("pages/clock_10_none.html")
# print x