from django.shortcuts import render, get_object_or_404
from django.http import HttpResponse

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

from serializers import ParticipationSerializer

import datetime


from rest_framework.decorators import api_view
from rest_framework.response import Response
from rest_framework import status

from django.views.decorators.csrf import csrf_exempt

# ---------------------------------------- API ---------------------------------------------------------

@csrf_exempt
@api_view( ['GET'] )
def event_participation_list( request ):
    """
        API for participation
    """
    if request.method == 'GET':
        event_participations = EventParticipation.objects.filter( event__date__gte = datetime.date.today() )
        serializer = ParticipationSerializer( event_participations, many=True)
        return Response( serializer.data )
    
    elif request.method == 'POST':
        serializer = ParticipationSerializer( data=request.DATA )
        if serializer.is_valid():
            print serializer.data
            serializer.save()
            return Response( serializer.data, status=status.HTTP_201_CREATED )
        else:
            return Response( serializer.errors, status = status.HTTP_400_BAD_REQUEST )


@csrf_exempt
@api_view( ['GET', 'PUT'] )
def event_participation_detail( request, username, eventId = None ):
    try:
        participationQs = EventParticipation.objects.filter( musician__user__username = username ) 
        if eventId:
            participationQs = participationQs.filter( event__pk = eventId )
        
    except EventParticipation.DoesNotExist:
        return HttpResponse( status=404)
       
    
    if request.method == 'GET':
        serializer = ParticipationSerializer( participationQs )
        return Response( serializer.data )
    
    elif request.method == 'PUT':
        serializer = ParticipationSerializer ( participationQs, data = request.DATA, many=True )
        if  serializer.is_valid():
            serializer.save()
            return Response( serializer.data )
        else:
            return Response( status = status.HTTP_400_BAD_REQUEST )
        
    




# ------------------------------------ Normal Views ----------------------------------------------------




def events_view( request ):
    # All events in the future sorted by date
    all_future_events = list ( Event.objects.filter( date__gte = datetime.date.today() ) )
    
    
    musician = get_object_or_404( Musician, user=request.user )
    
    for e in all_future_events:
        e.participation = EventParticipation.objects.get( event = e, musician = musician )
        
    context = { 'events' : all_future_events }
    return render ( request, 'eventplanner/event_view.html', context )