from rest_framework import status
from rest_framework.exceptions import APIException
from django.utils.translation import gettext as _


class ExamError(APIException):
    status_code = status.HTTP_500_INTERNAL_SERVER_ERROR
    default_detail = _("Exam error.")


class ExamAttemptError(ExamError):
    default_detail = _("Exam attempt error.")


class ActiveExamAttemptExistsError(ExamAttemptError):
    default_detail = _(
        "You already have an active exam in progress, please finish it first."
    )


class ExamAttemptSubmitSectionError(ExamAttemptError):
    default_detail = _("This section cannot be submitted.")


class ExamAttemptNotInProgressError(ExamAttemptError):
    status_code = status.HTTP_403_FORBIDDEN
    default_detail = _("This exam attempt is not in progress.")


class ExamAttemptExpiredError(ExamAttemptError):
    status_code = status.HTTP_403_FORBIDDEN
    default_detail = _("This exam attempt has expired.")


class ExamRedeemError(ExamError):
    default_detail = _("Exam redeem error.")


class ExamStartError(ExamError):
    default_detail = _("Exam start error.")


class ExamSectionError(ExamError):
    default_detail = _("Exam section error.")


class ExamSectionHandlerCapabilityError(ExamSectionError):
    default_detail = _("Exam section handler capability error.")


class ExamQuestionNotFoundError(ExamSectionError):
    status_code = status.HTTP_404_NOT_FOUND
    default_detail = _("Exam question not found.")


class ExamAnswerValidationError(ExamSectionError):
    status_code = status.HTTP_400_BAD_REQUEST
    default_detail = _("Invalid answer.")