from rest_framework import status
from rest_framework.exceptions import ValidationError

from api.models import EsExamRequirement
from api.translation import __
from api.utils import get_exception_detail, log_critical_error
from api.validator import BaseValidator
from api.views.admin.base import AdminApiBase


class ExamRequirementUpdateUnavailabilityRules(AdminApiBase):
    def validate_request(self, request):
        rules = {
            "id": "nullable|array|exists:api.EsExamRequirement,id",
        }

        attribute = {
            # "email": __("attr.email"),
        }

        validator = BaseValidator(request.data, rules, attribute)
        error = validator.validate()
        if error:
            raise ValidationError(error)

    def post(self, request):
        try:
            self.api_log_skip_outgoing_data = True
            self.validate_request(request)

            ids = request.data.get("id")
            if not ids:
                ids = []

            obj = None
            if isinstance(ids, (list, tuple)) and len(ids) == 1:
                obj = (
                    EsExamRequirement.objects
                    .prefetch_related("esexamrequirementunavailability_set")
                    .filter(id__in=ids)
                    .first()
                )

            info = None
            if obj:
                info = {
                    "code": obj.code,
                    "name": obj.name,
                    "time_slot": [
                        relation.time_slot
                        for relation in obj.esexamrequirementunavailability_set.order_by("time_slot").all()
                    ],
                }

            data = {
                "delete_confirmation_api": False,
                "allow_remove": [
                    "time_slot",
                ],
            }

            response = {
                "info": info,
                "rules": data,
            }

            return self.api_response(data=response)
        except ValidationError as e:
            first_message = e.detail["error"]
            errors = e.detail["errors"]
            return self.api_response(error=first_message, errors=errors, code=status.HTTP_400_BAD_REQUEST)
        except Exception as e:
            e_details = get_exception_detail(e)
            log_critical_error(user_id=None, descr=e_details["descr"], url=e_details["url"], trace=e_details["trace"])
            return self.api_response(error=__("message.internal_server_error"), code=status.HTTP_500_INTERNAL_SERVER_ERROR)