from rest_framework import status
from rest_framework.exceptions import ValidationError

from api.models import EsStudentGroup, EsDepartment
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 StudentGroupRules(AdminApiBase):
    def validate_request(self, request):
        rules = {
            "id": "nullable|array|exists:api.EsStudentGroup,id",
        }
        attribute = {}
        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 = (
                    EsStudentGroup.objects
                    .filter(id__in=ids)
                    .first()
                )

            info = None
            data = {}
            data['delete_confirmation_api'] = False
            data["allow_remove"] = [
                "department_id"
            ]

            if obj:
                info = {}
                info["id"] = obj.id
                info["code"] = obj.code
                info["name"] = obj.name
                info["desc"] = obj.desc
                info["department_id"] = obj.department_id
                info["status"] = obj.status
                info["status_text"] = __("attr.student_group_status." + str(obj.status)) if hasattr(obj, "status") else None

                for i in range(1, 11):
                    extra_data_field = f"extra_data_{i}"
                    info[extra_data_field] = getattr(obj, extra_data_field, None)

            models = {
                "department": (EsDepartment, ["id", "code", "name"]),
            }

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

            data['status'] = [
                {
                    "id": val,
                    "name": __(f"attr.student_group_status.{val}")
                }
                for key, val in EsStudentGroup.STATUS_TO_CODE.items()
            ]

            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)