from rest_framework import generics, views

from rest_api.filters import MayanObjectPermissionsFilter
from rest_api.permissions import MayanPermission

from .models import Role
from .permissions import (PERMISSION_ROLE_CREATE, PERMISSION_ROLE_DELETE,
                          PERMISSION_ROLE_EDIT, PERMISSION_ROLE_VIEW)
from .serializers import RoleSerializer


class APIRoleListView(generics.ListCreateAPIView):
    serializer_class = RoleSerializer
    queryset = Role.objects.all()

    permission_classes = (MayanPermission,)
    filter_backends = (MayanObjectPermissionsFilter,)
    mayan_object_permissions = {'GET': [PERMISSION_ROLE_VIEW]}
    mayan_view_permissions = {'POST': [PERMISSION_ROLE_CREATE]}

    def get(self, *args, **kwargs):
        """Returns a list of all the roles."""
        return super(APIRoleListView, self).get(*args, **kwargs)

    def post(self, *args, **kwargs):
        """Create a new role."""
        return super(APIRoleListView, self).post(*args, **kwargs)


class APIRoleView(generics.RetrieveUpdateDestroyAPIView):
    serializer_class = RoleSerializer
    queryset = Role.objects.all()

    permission_classes = (MayanPermission,)
    mayan_object_permissions = {
        'GET': [PERMISSION_ROLE_VIEW],
        'PUT': [PERMISSION_ROLE_EDIT],
        'PATCH': [PERMISSION_ROLE_EDIT],
        'DELETE': [PERMISSION_ROLE_DELETE]
    }

    def delete(self, *args, **kwargs):
        """Delete the selected role."""
        return super(APIRoleView, self).delete(*args, **kwargs)

    def get(self, *args, **kwargs):
        """Return the details of the selected role."""
        return super(APIRoleView, self).get(*args, **kwargs)

    def patch(self, *args, **kwargs):
        """Edit the selected role."""
        return super(APIRoleView, self).patch(*args, **kwargs)

    def put(self, *args, **kwargs):
        """Edit the selected role."""
        return super(APIRoleView, self).put(*args, **kwargs)