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