import icalendar
import datetime
import recurring_ical_events
from fetchMENSA import getMeals

shortnames = ["mon", "tue", "wed", "thu", "fri", "sat"]
longnames = ["Montag", "Dienstag", "Mittwoch", "Donnerstag", "Freitag", "Samstag"]


def getWeek(weekstart: datetime, file: str, showsat: bool):
    """
    Liefert alle Events einer Woche zurück.
    Wochenstart wird automatisch auf den Montag der Woche gelegt.
    :param weekstart:
    :param file:
    :param showsat:
    :return:
    """
    if weekstart == "today":
        start_date = datetime.date.today()
    else:
        start_date = weekstart
    start_date -= datetime.timedelta(days=start_date.weekday() % 7)
    end_date = start_date + datetime.timedelta(days=7)
    with open("calendars/" + file) as f:
        calendar = icalendar.Calendar.from_ical(f.read())
    events = recurring_ical_events.of(calendar).between(start_date, end_date)
    eventl = []
    for event in events:
        estart = event["DTSTART"].dt
        formstart = str(estart.hour) + ":" + str(estart.minute)
        eend = event["DTEND"].dt
        formend = str(eend.hour) + ":" + str(eend.minute)
        forml = [formstart, formend]
        for i in range(2):
            if len(forml[i]) != 5:
                if forml[i][-2] == ":":
                    forml[i] = forml[i] + "0"
                if forml[i][1] == ":":
                    forml[i] = "0" + forml[i]
        formstart = forml[0]
        formend = forml[1]
        eventdict = {
            "start": formstart,
            "end": formend,
            "dur": str(event["DTEND"].dt - event["DTSTART"].dt)[:-3],
            "name": event["SUMMARY"],
            "room": event["LOCATION"],
            "weekday": estart.weekday(),
            "day": estart.day
        }
        eventl += [eventdict]
    return eventl, daylist(start_date, showsat)


def daylist(weekstart: datetime, showsat: bool):
    """
    Gibt die Essen einer Woche zurück.
    :param weekstart:
    :param showsat:
    :return:
    """
    weekday = weekstart
    dayl = []
    if showsat:
        r = 6
    else:
        r = 5
    for i in range(r):
        essen = getMeals(weekday)
        dayl += [{
            "day": weekday.day,
            "short": shortnames[i],
            "long": longnames[i],
            "mensa": essen
        }]
        weekday += datetime.timedelta(days=1)
    return dayl