import { getOperationName } from '@apollo/client/utilities';
import { useSetRecoilState } from 'recoil';

import { GET_VIEW_FIELDS } from '@/views/queries/select';
import {
  SortOrder,
  useCreateViewFieldsMutation,
  useGetViewFieldsQuery,
} from '~/generated/graphql';

import { entityTableDimensionsState } from '../states/entityTableDimensionsState';
import { viewFieldsState } from '../states/viewFieldsState';
import {
  ViewFieldDefinition,
  ViewFieldMetadata,
  ViewFieldTextMetadata,
} from '../types/ViewField';

const DEFAULT_VIEW_FIELD_METADATA: ViewFieldTextMetadata = {
  type: 'text',
  placeHolder: '',
  fieldName: '',
};

export const useLoadView = ({
  objectName,
  viewFieldDefinitions,
}: {
  objectName: 'company' | 'person';
  viewFieldDefinitions: ViewFieldDefinition<ViewFieldMetadata>[];
}) => {
  const setEntityTableDimensions = useSetRecoilState(
    entityTableDimensionsState,
  );
  const setViewFields = useSetRecoilState(viewFieldsState);

  const [createViewFieldsMutation] = useCreateViewFieldsMutation();

  useGetViewFieldsQuery({
    variables: {
      orderBy: { index: SortOrder.Asc },
      where: { objectName: { equals: objectName } },
    },
    onCompleted: (data) => {
      if (data.viewFields.length) {
        setViewFields(
          data.viewFields.map<ViewFieldDefinition<ViewFieldMetadata>>(
            (viewField) => ({
              ...(viewFieldDefinitions.find(
                ({ columnLabel }) => viewField.fieldName === columnLabel,
              ) || { metadata: DEFAULT_VIEW_FIELD_METADATA }),
              id: viewField.id,
              columnLabel: viewField.fieldName,
              columnOrder: viewField.index,
              columnSize: viewField.sizeInPx,
            }),
          ),
        );
        setEntityTableDimensions((prevState) => ({
          ...prevState,
          numberOfColumns: data.viewFields.length,
        }));
        return;
      }

      // Populate if empty
      createViewFieldsMutation({
        variables: {
          data: viewFieldDefinitions.map((viewFieldDefinition) => ({
            fieldName: viewFieldDefinition.columnLabel,
            index: viewFieldDefinition.columnOrder,
            isVisible: true,
            objectName,
            sizeInPx: viewFieldDefinition.columnSize,
          })),
        },
        refetchQueries: [getOperationName(GET_VIEW_FIELDS) ?? ''],
      });
    },
  });
};