from ninja import Router, ModelSchema, Schema
from ninja.errors import HttpError
from config import models
from typing import List
from guardian.shortcuts import get_objects_for_user, assign_perm
from django.shortcuts import get_object_or_404

router = Router()

class Stream(ModelSchema):
  class Meta:
    model = models.Stream
    fields = "__all__"


class StreamPatch(ModelSchema):
  class Meta:
    model = models.Stream
    fields = ["name"]
    fields_optional = "__all__"
    extra = "forbid"


class StreamCreate(ModelSchema):
  class Meta:
    model = models.Stream
    fields = ["name"]
    extra = "forbid"


@router.get('/streams', response=List[Stream])
def list_streams(request):
  return get_objects_for_user(request.user, 'view_stream', models.Stream.objects.all())


@router.post('/streams', response=Stream)
def create_stream(request, payload: StreamCreate):
  stream = models.Stream.objects.create(**payload.dict())
  assign_perm('view_stream', request.user, stream)
  assign_perm('change_stream', request.user, stream)
  assign_perm('delete_stream', request.user, stream)
  return stream


@router.get('/streams/{id}', response=Stream)
def get_stream(request, id: int):
  stream = get_object_or_404(models.Stream, id=id)

  if not request.user.has_perm('view_stream', stream):
    raise HttpError(401, "unauthorized")
  return stream


@router.patch('/streams/{id}', response=Stream)
def update_stream(request, id: int, payload: StreamPatch):
  stream = get_object_or_404(models.Stream, id=id)

  if not request.user.has_perm('change_stream', stream):
    raise HttpError(401, "unauthorized")

  stream.name = payload.name
  stream.save()
  return stream


@router.delete('/streams/{id}', response=None)
def delete_stream(request, id: int):
  stream = get_object_or_404(models.Stream, id=id)

  if not request.user.has_perm('delete_stream', stream):
    raise HttpError(401, "unauthorized")

  stream.delete()