import json

from rest_framework import status
from rest_framework.exceptions import ValidationError, PermissionDenied

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

class AcademicTermSetting(AdminApiBase):
    def has_academic_term_setting_permission(self, user):
        if not user.has_perm("academic_term_setting"):
            return False
        return True

    def validate_request(self, request):
        if "id" not in request.data:
            raise ValidationError({
                "error": __('validation.required', field=__("attr.id")),
                "errors": {"id": [__('validation.required', field=__("attr.id"))]}
            })

        academic_term_ids = request.data.get("id")
        if academic_term_ids is None:
            return None

        rules = {
            "id": "array|exists:api.TtAcademicTerm,id",
        }

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

        return academic_term_ids

    def post(self, request):
        try:
            # temporary hide, not working
            # if not self.has_academic_term_setting_permission(request.user):
            #     return self.api_response(
            #         error=__("validation.no_permission"),
            #         code=status.HTTP_403_FORBIDDEN,
            #     )

            academic_term_ids = self.validate_request(request)

            if academic_term_ids is None:
                setting_value = None
            else:
                unique_ids = list(dict.fromkeys(academic_term_ids))
                setting_value = json.dumps(unique_ids) if unique_ids else None

            Setting.objects.update_or_create(
                param="academic_term",
                defaults={"value": setting_value},
            )

            return self.api_response(data={})

        except ValidationError as e:
            return self.api_response(
                error=e.detail["error"],
                errors=e.detail["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
            )