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


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


@router.get('/pulls', response=List[Pull])
def list_pulls(request):
  return get_objects_for_user(request.user, 'view_pull', models.Pull.objects.all())


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

  pull = models.Pull.objects.create(**payload.dict())
  assign_perm(  'view_pull', request.user, pull)
  assign_perm('change_pull', request.user, pull)
  assign_perm('delete_pull', request.user, pull)
  return pull


@router.get('/pulls/{id}', response=Pull)
def get_pull(request, id: int):
  pull = get_object_or_404(models.Pull, id=id)

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

  return pull


@router.patch('/pulls/{id}', response=Pull)
def patch_pull(request, id: int, payload: PullPatch):
  pull = get_object_or_404(models.Pull, id=id)

  if not request.user.has_perm('change_pull', pull):
    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(pull, key, value)
  pull.save()
  return pull


@router.delete('/pulls/{id}', response=None)
def delete_pull(request, id: int):
  pull = get_object_or_404(models.Pull, id=id)

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

  pull.delete()