from datetime import datetime

from musicians.models import Musician

from .models import Event, EventParticipation, NoNextEventException


def addEventCountdownForNextEventToContext(context, username, eventType=""):
    """Returns an object that has to be added to the render context on the page where the countdown
    should be displayed. The username is required to also supply participation information."""

    try:
        nextEvent = Event.getNextEvent(eventType, False)
    except NoNextEventException:
        return

    countdown = {}

    if EventParticipation.isMember(username):
        part = EventParticipation.objects.filter(user=username).filter(event=nextEvent)
        if part.exists():
            countdown["participation"] = part[0].status

    eventTime = nextEvent.displaydatetime
    countdown["event"] = nextEvent
    countdown["epoch"] = int((eventTime - datetime.now()).total_seconds() * 1000)

    context["countdown"] = countdown


def addEventRouteForNextEventToContext(context, username, eventType=""):
    """Returns an object that has to be added to the render context on the page where the route
    should be displayed. The starting address of the route will be the home of the specified user"""

    try:
        nextEvent = Event.getNextEvent(eventType, True)
    except NoNextEventException:
        return

    routeInfo = {}

    routeInfo["event"] = nextEvent

    try:
        musician = Musician.objects.get(user=username)
        routeInfo["origin"] = (
            musician.street + ", " + str(musician.zip_code) + " " + musician.city
        )
    except Musician.DoesNotExist:
        routeInfo["origin"] = ""

    if nextEvent.map_location:
        # map_location has format "lat,longitude,zoomlevel"
        routeInfo["destination"] = ",".join(nextEvent.map_location.split(",")[:2])
    else:
        routeInfo["destination"] = nextEvent.location

    context["route"] = routeInfo