"""
A Telisaran calendaring tool.
"""
from . import telisaran

from rich.table import Table


class TelisaranCalendar:
    """
    The Telisaran Calendar

    Syfdag kindle fate’s first light
    Mimdag have a secret might
    Wodag have the strength to fight
    Thordag curse the wrong, avenge the right
    Freydag love fair beauty’s sight

        – Dwarven nursery rhyme
    """

    def __init__(self, today=None, start=None, end=None):

        self.today = today
        if not self.today:
            self.today = telisaran.today

        self._end = end or self.today

        if start:
            self._start = start
        else:
            self._start = telisaran.datetime(
                year=self._end.year.year,
                season=self._end.season.season_of_year,
                day=1
            )

    @property
    def season(self):
        table = Table(
            *[n[0:2] for n in telisaran.Day.names],
            title=self._start.season.name.upper()
        )
        row = []
        for day in self._start.season.days:
            row.append("{:02d}".format(day.day_of_season))
            if day.day_of_span == telisaran.Span.length_in_days:
                table.add_row(*row)
                row = []
        return table

    @property
    def yesterday(self):
        try:
            return self.today - telisaran.Day.length_in_seconds
        except telisaran.InvalidDayError:
            return "Mortals cannot go back before the beginning of time."

    @property
    def tomorrow(self):
        return self.today + telisaran.Day.length_in_seconds

    def __repr__(self):
        return "The Telisaran Calendar"