from django.shortcuts import get_object_or_404

from rest_framework import mixins, status, viewsets
from rest_framework.decorators import action
from rest_framework.permissions import AllowAny
from rest_framework.response import Response

from profiles.models import RadioProfile, SongRequest
from ..permissions import IsAdminOwnerOrReadOnly
from ..serializers.profiles import (BasicProfileSerializer,
                                    FullProfileSerializer,
                                    HistorySerializer,
                                    BasicProfileRatingsSerializer)
from ..serializers.radio import SongListSerializer


class ProfileViewSet(viewsets.ModelViewSet):
    permission_classes = [IsAdminOwnerOrReadOnly]
    queryset = RadioProfile.objects.all()
    serializer_class = BasicProfileSerializer

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.is_owner = False

    def get_serializer_class(self):
        '''
        Choose a different serializer based on if the requesting user is an
        admin or is the same person as the profile requested.
        '''
        if self.request.user.is_staff or self.is_owner:
            return FullProfileSerializer
        return BasicProfileSerializer

    def get_object(self):
        '''
        Grab the object as normal, but let us know if the requesting user is
        the owner.
        '''
        obj = get_object_or_404(self.get_queryset(), **self.kwargs)
        if self.request.user.pk == obj.user.pk:
            self.is_owner = True
        else:
            self.is_owner = False
        self.check_object_permissions(self.request, obj)
        return obj

    @action(detail=True, permission_classes=[AllowAny])
    def favorites(self, request, pk=None):
        profile = self.get_object()
        favorites = profile.favorites.all().order_by('sorted_title')

        page = self.paginate_queryset(favorites)
        if page is not None:
            serializer = SongListSerializer(page, many=True)
            return self.get_paginated_response(serializer.data)

        serializer = SongListSerializer(favorites, many=True)
        return Response(serializer.data)

    @action(detail=True, permission_classes=[AllowAny])
    def ratings(self, request, pk=None):
        profile = self.get_object()
        ratings = profile.rating_profile.all().order_by('-created_date')

        page = self.paginate_queryset(ratings)
        if page is not None:
            serializer = BasicProfileRatingsSerializer(page, many=True)
            return self.get_paginated_response(serializer.data)

        serializer = BasicProfileRatingsSerializer(ratings, many=True)
        return Response(serializer.data)


class HistoryViewSet(mixins.ListModelMixin, viewsets.GenericViewSet):
    permission_classes = [AllowAny]
    queryset = SongRequest.objects.all()
    serializer_class = HistorySerializer