from rest_framework import status
from rest_framework.exceptions import ValidationError

from api.models import EsDepartment, EsInvigilator, EsLocation, EsSuitability, EsTag
from api.translation import __
from api.utils import log_critical_error, get_exception_detail
from api.validator import BaseValidator
from api.views.admin.base import AdminApiBase


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

        attribute = {
        }

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

        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 = []
            suitability = None
            if isinstance(ids, (list, tuple)) and len(ids) == 1:
                suitability = (
                    EsSuitability.objects
                    .select_related("department")
                    .prefetch_related(
                        "invigilator",
                        "location",
                        "tag__tag"
                    )
                    .filter(id__in=ids)
                    .first()
                )

            info = None
            if suitability:
                info = {
                    "code": suitability.code,
                    "name": suitability.name,
                    "desc": suitability.desc,
                    "department_id": suitability.department_id,
                    "invigilator_id": suitability.invigilator.all().values_list("id", flat=True),
                    "location_id": suitability.location.all().values_list("id", flat=True),
                    "tag": suitability.tag.all().values_list("tag_id", flat=True),
                }
                for i in range(1, 11):
                    extra_data_field = f"extra_data_{i}"
                    info[extra_data_field] = getattr(suitability, extra_data_field, None)

            models = {
                "department": (EsDepartment, ["id", "code", "name"]),
                "invigilator": (EsInvigilator, ["id", "code", "name"]),
                "location": (EsLocation, ["id", "code", "name"]),
                "tag": (EsTag, ["id", "code", "name"]),
            }

            data = {}
            data["delete_confirmation_api"] = False
            data["allow_remove"] = [
                "desc",
                "department_id",
                "invigilator_id",
                "location_id",
                "tag",
                *[f"extra_data_{i}" for i in range(1, 11)]
            ]

            data['status'] = [
                {
                    "id": status_code,
                    "name": __("attr.suitability_status." + str(status_code))
                }
                for status_code in EsSuitability.STATUS_TO_CODE.values()
            ]

            for key, (model, fields) in models.items():
                data[key] = list(
                    model.objects.filter(status=model.STATUS_TO_CODE['active']).values(*fields)
                )

            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)