from collections import defaultdict

from django.contrib.postgres.aggregates import ArrayAgg
from django.db.models import Q
from rest_framework import serializers, status

from api.models import TtSuitability, TtTag, TtSetting, AuditTrail, AuditTrailDetails, TtDepartment, TtZone, \
    TtTravelTable, TtConstraintProfile
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, \
    bulk_sync_to_redis, get_ip, get_related_fk_table_ids
from rest_framework.exceptions import ValidationError
from api.translation import __
from backend.kafka import send_request
from backend.redis_client import redis_client


class TravelTableDelete(AdminApiBase):
    def validate_request(self,request):
        rules = {
            "id": "required|array|exists:api.TtTravelTable,id",
        }
        # if need rename field, can put here
        attribute = {
            # "email": __("attr.email"),
        }
        # validate id first, cause need get travel_table 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)

            action = "travel_table_delete"
            ids = request.data.get("id")

            travel_table = TtTravelTable.objects.filter(id__in=ids).prefetch_related("ttconstraintprofile_set")
            travel_table_name = ",".join(travel_table.values_list("name", flat=True))
            constraint_profile_ids = set()
            for val in travel_table:
                constraint_profile_ids.update({cp.id for cp in val.ttconstraintprofile_set.all()})


            redis_related_fk_data = get_related_fk_table_ids("TtTravelTable",ids,True)

            TtTravelTable.objects.filter(id__in=ids).delete()
            # after delete only get latest constraint profile things
            constraint_profiles = {}
            if constraint_profile_ids:
                constraint_profiles = TtConstraintProfile.objects.filter(id__in=constraint_profile_ids).prefetch_related("travel_table")

            # remove from redis
            redis_travel_table_table = "travel_table"
            redis_constraint_profile_table = "constraint_profile"

            redis_data = {
                "update": {},
                "delete": {}
            }
            # delete travel_table from redis
            for id in ids:
                redis_data["delete"].setdefault(redis_travel_table_table, []).append(id)
            if redis_related_fk_data:
                for redis_table, related_ids in redis_related_fk_data.items():
                    redis_data["delete"].setdefault(redis_table, []).extend(related_ids)

            for constraint_profile in constraint_profiles:
                redis_data["update"].setdefault(redis_constraint_profile_table, []).append({
                    "id": constraint_profile.id,
                    "travel_table_ids": [tb.id for tb in constraint_profile.travel_table.all()],
                })

            bulk_sync_to_redis(redis_client,redis_data)

            audit_trail = AuditTrail.objects.create(
                user_id=request.user.id,
                type=self.audit_type,
                ip_address=get_ip(request)
            )
            remark_param = {
                "name": travel_table_name
            }

            # call to a function for insert details, so in future if want change to used worker, can modify in function only
            AuditTrailDetails.custom_insert(
                audit_trail=audit_trail,
                action=action,
                remark_param=remark_param,
            )
            response = {

            }

            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)