"""
File contains util functions.
"""

from datetime import datetime

from config import DakinyConfig


def get_datetime(day: str) -> datetime:
    """
    Takes in a string month and day and returns a datetime object of that Month/Day this year.

    Args:
        day (str): Month/Day in that format.

    Returns:
        datetime: Datetime representation of Month/Day.
    """
    year = datetime.today().year
    month = int(day.split("/")[0])
    day = int(day.split("/")[1])

    # ensure that year rolls over if current month is December and the next month is less than 12.
    if datetime.today().month == 12 & month < 12:
        year += 1

    return datetime(year, month, day)


def get_election_cycle_name(config: DakinyConfig) -> str:
    """
    Builds the unique name of the current election cycle

    Returns:
        str: the name of the election cycle
    """
    cycle = get_current_cycle(config)
    current_cycle = config.election_cycles[cycle]

    return f"vote-{get_datetime(current_cycle.election_start).year}-{current_cycle.name}"


def get_current_cycle(config: DakinyConfig) -> int:
    """
    Returns index for active election. An election is considered active between the election start and the term start.

    Args:
        config (DakinyConfig): Config object to use

    Returns:
        int: cycle index for active election. -1 for no active cycle
    """

    today = datetime.today()

    for cycle, election in enumerate(config.election_cycles):
        if (
            today.date() >= get_datetime(election.election_start).date()
            and today.date() <= get_datetime(election.term_start).date()
        ):
            return cycle

    return -1