from rest_framework import status
from rest_framework.exceptions import ValidationError

from api.models.audit_trail import AuditTrail
from api.models.audit_trail_details import AuditTrailDetails
from api.models.es_exam_activity import EsExamActivity
from api.translation import __
from api.utils import log_critical_error, get_exception_detail, get_ip
from api.validator import BaseValidator
from api.views.admin.base import AdminApiBase


class ExamActivityDelete(AdminApiBase):
	def validate_request(self, request):
		rules = {
			"id": "required|array|exists:api.EsExamActivity,id",
		}

		attribute = {}

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

		# Ensure each exam_requirement retains at least 1 activity after deletion
		ids = request.data.get("id")
		activities_to_delete = EsExamActivity.objects.filter(id__in=ids).values("id", "exam_requirement_id")

		from collections import defaultdict
		delete_count_by_requirement = defaultdict(int)
		for activity in activities_to_delete:
			delete_count_by_requirement[activity["exam_requirement_id"]] += 1

		for exam_requirement_id, delete_count in delete_count_by_requirement.items():
			total = EsExamActivity.objects.filter(exam_requirement_id=exam_requirement_id).count()
			if total - delete_count < 1:
				message = __("validation.exam_activity.min_one_required")
				raise ValidationError({
					"error": message,
					"errors": {
						"id": [message],
					},
				})

	def post(self, request):
		try:
			self.validate_request(request)

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

			obj = EsExamActivity.objects.filter(id__in=ids)
			code = ",".join(obj.values_list("code", flat=True))

			EsExamActivity.objects.filter(id__in=ids).delete()

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

			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)