"""
Generic views that provide commonly needed behaviour.
"""
from django.core.exceptions import ValidationError
from django.db.models.query import QuerySet
from django.http import Http404
from django.shortcuts import get_object_or_404 as _get_object_or_404

from rest_framework import views
from rest_framework.generics import GenericAPIView
from rest_framework.settings import api_settings

from libraries import mixins


# Concrete view classes that provide method handlers
# by composing the mixin classes with the base view.

# Single item CRUD

class CachedCreateAPIView(mixins.CachedCreateModelMixin,GenericAPIView):
    """
    Concrete view for creating a model instance.
    """
    def post(self, request, *args, **kwargs):
        return self.create(request, *args, **kwargs)


class CachedRetrieveAPIView(mixins.CachedRetrieveModelMixin,GenericAPIView):
    """
    Concrete view for retrieving a model instance.
    """
    def get(self, request, *args, **kwargs):
        return self.retrieve(request, *args, **kwargs)


class CachedUpdateAPIView(mixins.CachedUpdateModelMixin,GenericAPIView):
    """
    Concrete view for updating a model instance.
    """
    def put(self, request, *args, **kwargs):
        return self.update(request, *args, **kwargs)

    def patch(self, request, *args, **kwargs):
        return self.partial_update(request, *args, **kwargs)


class CachedDestroyAPIView(mixins.CachedDestroyModelMixin,GenericAPIView):
    """
    Concrete view for deleting a model instance.
    """
    def delete(self, request, *args, **kwargs):
        return self.destroy(request, *args, **kwargs)


class CachedRetrieveUpdateAPIView(mixins.CachedRetrieveModelMixin,mixins.CachedUpdateModelMixin,GenericAPIView):
    """
    Concrete view for retrieving, updating a model instance.
    """
    def get(self, request, *args, **kwargs):
        return self.retrieve(request, *args, **kwargs)

    def put(self, request, *args, **kwargs):
        return self.update(request, *args, **kwargs)

    def patch(self, request, *args, **kwargs):
        return self.partial_update(request, *args, **kwargs)


class CachedRetrieveDestroyAPIView(mixins.CachedRetrieveModelMixin,mixins.CachedDestroyModelMixin,GenericAPIView):
    """
    Concrete view for retrieving or deleting a model instance.
    """
    def get(self, request, *args, **kwargs):
        return self.retrieve(request, *args, **kwargs)

    def delete(self, request, *args, **kwargs):
        return self.destroy(request, *args, **kwargs)


class CachedRetrieveUpdateDestroyAPIView(mixins.CachedRetrieveModelMixin,mixins.CachedUpdateModelMixin,mixins.CachedDestroyModelMixin,GenericAPIView):
    """
    Concrete view for retrieving, updating or deleting a model instance.
    """
    def get(self, request, *args, **kwargs):
        return self.retrieve(request, *args, **kwargs)

    def put(self, request, *args, **kwargs):
        return self.update(request, *args, **kwargs)

    def patch(self, request, *args, **kwargs):
        return self.partial_update(request, *args, **kwargs)

    def delete(self, request, *args, **kwargs):
        return self.destroy(request, *args, **kwargs)


class CachedCreateRetrieveUpdateDestroyAPIView(mixins.CachedCreateModelMixin,mixins.CachedRetrieveModelMixin,mixins.CachedUpdateModelMixin,mixins.CachedDestroyModelMixin,GenericAPIView):
    """
    Concrete view for creating, retrieving, updating or deleting a model instance.
    """
    def get(self, request, *args, **kwargs):
        return self.retrieve(request, *args, **kwargs)

    def post(self, request, *args, **kwargs):
        return self.create(request, *args, **kwargs)

    def put(self, request, *args, **kwargs):
        return self.update(request, *args, **kwargs)

    def patch(self, request, *args, **kwargs):
        return self.partial_update(request, *args, **kwargs)

    def delete(self, request, *args, **kwargs):
        return self.destroy(request, *args, **kwargs)


# List based CRUD

class CachedListRetrieveAPIView(mixins.CachedListRetrieveModelMixin,GenericAPIView):
    """
    Concrete view for listing a queryset.
    """
    def get(self, request, *args, **kwargs):
        return self.list(request, *args, **kwargs)


class CachedListCreateAPIView(mixins.CachedListCreateModelMixin,GenericAPIView):
    """
    Concrete view for creating multiple instances.
    """
    def post(self, request, *args, **kwargs):
        return self.list_create(request, *args, **kwargs)


class CachedListUpdateAPIView(mixins.CachedListUpdateModelMixin,GenericAPIView):
    """
    Concrete view for updating multiple instances.
    """
    def put(self, request, *args, **kwargs):
        return self.list_update(request, *args, **kwargs)

    def patch(self, request, *args, **kwargs):
        return self.list_partial_update(request, *args, **kwargs)


class CachedListDestroyAPIView(mixins.CachedListDestroyModelMixin,GenericAPIView):
    """
    Concrete view for deleting multiple instances.
    """
    def delete(self, request, *args, **kwargs):
        return self.list_destroy(request, *args, **kwargs)


class CachedListRetrieveCreateAPIView(mixins.CachedListRetrieveModelMixin,mixins.CachedListCreateModelMixin,GenericAPIView):
    """
    Concrete view for listing a queryset or creating a model instance.
    """
    def get(self, request, *args, **kwargs):
        return self.list(request, *args, **kwargs)

    def post(self, request, *args, **kwargs):
        return self.create(request, *args, **kwargs)


class CachedListCreateRetrieveDestroyAPIView(mixins.CachedListCreateModelMixin,mixins.CachedListRetrieveModelMixin,mixins.CachedListDestroyModelMixin,GenericAPIView):
    """
    Concrete view for creating, retrieving or deleting a model instance.
    """
    def get(self, request, *args, **kwargs):
        return self.list(request, *args, **kwargs)

    def post(self, request, *args, **kwargs):
        return self.list_create(request, *args, **kwargs)

    def delete(self, request, *args, **kwargs):
        return self.list_destroy(request, *args, **kwargs)


class CachedListCreateRetrieveUpdateAPIView(mixins.CachedListCreateModelMixin,mixins.CachedListRetrieveModelMixin,mixins.CachedListUpdateModelMixin,GenericAPIView):
    """
    Concrete view for creating, retrieving, updating or deleting a model instance.
    """
    def get(self, request, *args, **kwargs):
        return self.list(request, *args, **kwargs)

    def post(self, request, *args, **kwargs):
        return self.list_create(request, *args, **kwargs)

    def put(self, request, *args, **kwargs):
        return self.list_update(request, *args, **kwargs)

    def patch(self, request, *args, **kwargs):
        return self.list_partial_update(request, *args, **kwargs)


class CachedListCreateRetrieveUpdateDestroyAPIView(mixins.CachedListCreateModelMixin,mixins.CachedListRetrieveModelMixin,mixins.CachedListUpdateModelMixin,mixins.CachedListDestroyModelMixin,GenericAPIView):
    """
    Concrete view for creating, retrieving, updating or deleting a model instance.
    """
    def get(self, request, *args, **kwargs):
        return self.list(request, *args, **kwargs)

    def post(self, request, *args, **kwargs):
        return self.list_create(request, *args, **kwargs)

    def put(self, request, *args, **kwargs):
        return self.list_update(request, *args, **kwargs)

    def patch(self, request, *args, **kwargs):
        return self.list_partial_update(request, *args, **kwargs)

    def delete(self, request, *args, **kwargs):
        return self.list_destroy(request, *args, **kwargs)