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


class RestreamPatch(ModelSchema):
  class Meta:
    model = models.Restream
    exclude = ["id"]
    fields_optional = "__all__"
    extra = "forbid"


@router.get('/', response=List[Restream])
def list_restreams(request):
  return get_objects_for_user(request.user, 'view_restream', models.Restream.objects.all())


@router.post('/', response=Restream)
def create_restream(request, payload: Restream):
  if not request.user.has_perm('view_stream', payload.stream):
    raise HttpError(401, "unauthorized")

  restream = models.Restream.objects.create(**payload.dict())
  assign_perm('view_restream', request.user, restream)
  assign_perm('change_restream', request.user, restream)
  assign_perm('delete_restream', request.user, restream)
  return restream


@router.get('/{id}', response=Restream)
def get_restream(request, id: int):
  restream = get_object_or_404(models.Restream, id=id)

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

  return restream


@router.patch('/{id}', response=Restream)
def update_restream(request, id: int, payload: RestreamPatch):
  restream = get_object_or_404(models.Restream, id=id)

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

  if payload.stream:
    payload.stream = get_object_or_404(models.Stream, id=payload.stream)

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

  for key, value in payload.dict(exclude_unset=True).items():
    setattr(restream, key, value)
  restream.save()
  return restream


@router.delete('/{id}', response=None)
def delete_restream(request, id: int):
  restream = get_object_or_404(models.Restream, id=id)

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

  restream.delete()