from datetime import datetime
from .models import Event, EventParticipation, NoNextEventException
from musicians.models import Musician


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 = dict()

    if EventParticipation.isMember(username):
        part = EventParticipation.objects.filter(user=username).filter(event=nextEvent)
        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 = dict()

    routeInfo['event'] = nextEvent

    musician = Musician.objects.get(user=username);
    routeInfo['origin'] = musician.street + ", " + str(musician.zip_code) + " " + musician.city

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

    context["route"] = routeInfo