from datetime import datetime, timedelta
from typing import Optional

from config import config

def time_to_hour(time: timedelta) -> float:
    return time.total_seconds() / 3600

def today_start() -> datetime:
    td = datetime.today()
    year = td.year
    month = td.month
    day = td.day
    return datetime(year=year, month=month, day=day, hour=0)

def today_end() -> datetime:
    td = datetime.today()
    year = td.year
    month = td.month
    day = td.day
    return datetime(year=year, month=month, day=day, hour=23)


def str_to_date(date: str) -> Optional[datetime]:
    if date:
        return datetime.strptime(date + "T00:00:00Z", config.DATETIME_FORMAT)

def format_date(date: datetime) -> datetime:
    if date:
        return date.strftime(config.DATETIME_FORMAT)