from collections import defaultdict
from rest_framework import status

from api.models import TtPos
from api.views.admin.base import AdminApiBase
from api.validator import BaseValidator
from api.utils import decrypt_aes_128_cbc, encrypt_aes_128_cbc, log_critical_error, get_exception_detail
from rest_framework.exceptions import ValidationError
from api.translation import __


class StudentRulesGetPos(AdminApiBase):
    def validate_request(self,request):
        rules = {
            # "id": "nullable|array|exists:api.TtStudentSet,id",
            "academic_term_ids": "required|array|exists:api.TtAcademicTerm,id",
        }
        # if need rename field, can put here
        attribute = {
            # "email": __("attr.email"),
        }
        # validate id first, cause need get student_set 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.api_log_skip_outgoing_data=True
            self.validate_request(request)
            academic_term_ids = request.data.get('academic_term_ids')
            pos_list = TtPos.objects.filter(academic_term_id__in=academic_term_ids,status=TtPos.STATUS_TO_CODE["active"]).select_related("academic_term")

            data = {}
            for pos in pos_list:
                pos_academic_term_id = pos.academic_term_id

                if pos_academic_term_id not in data:
                    data[pos_academic_term_id] = {
                        "id": pos.academic_term.id,
                        "name": pos.academic_term.name,
                        "code": pos.academic_term.code,
                        "pos": []
                    }

                data[pos_academic_term_id]["pos"].append({
                    "id": pos.id,
                    "name": pos.name,
                    "code": pos.code,
                    "planned_size": pos.planned_size,
                })
            response = {
                "data": list(data.values()),
            }
            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)