from rest_framework import status

from api.models import EsSessionStart, EsExamPeriod
from api.validator import BaseValidator
from api.views.admin.base import AdminApiBase
from api.utils import log_critical_error, get_exception_detail
from rest_framework.exceptions import ValidationError
from api.translation import __

class SessionStartRules(AdminApiBase):
    def validate_request(self,request):
        rules = {
            "id": "nullable|array|exists:api.EsSessionStart,id",
        }
        # if need rename field, can put here
        attribute = {
            # "email": __("attr.email"),
        }
        # validate id first, cause need get module_group by id, if wrong id direct return error
        validator = BaseValidator(request.data,rules,attribute)
        error = validator.validate()
        if error:
            raise ValidationError(error)
        # custom error after basic validation

        if error:
            raise ValidationError(error)

    def post(self, request):
        # Validate input
        try:
            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 = (
                    EsSessionStart.objects
                    .prefetch_related("essessionstartday_set")
                    .filter(id__in=ids)
                    .first()
                )

            info = None
            data = {}
            data['delete_confirmation_api'] = False
            data["allow_remove"] = [
                'days',
            ]
            data['status'] = [
                {
                    "id": val,
                    "name": __(f"attr.session_start_status.{val}")
                }
                for key, val in EsSessionStart.STATUS_TO_CODE.items()
            ]

            data['days'] = []
            for i in range(0,7):
                data['days'].append({
                    "id": i,
                    "name": __("attr.days_name."+str(i))
                })

            data['exam_periods'] = [
                {
                    "id": obj.id,
                    "code": obj.code,
                    "name": obj.name,
                }
                for obj in EsExamPeriod.objects.filter(status=EsExamPeriod.STATUS_TO_CODE['active']).order_by("name").all()
            ]

            if obj:
                info = {}

                info["id"] = obj.id
                info["code"] = obj.code
                info["start_time"] = obj.start_time
                info["status"] = obj.status
                info["status_text"] = __("attr.session_start_status." + str(obj.status))
                days = [
                    {
                        "id": rp.day,
                        "name": __("attr.days_name." + str(rp.day))
                    }
                    for rp in obj.essessionstartday_set.order_by("day").all()
                ]
                info['days'] = days

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

            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)