import { UpdateManyToManyAssociationsOptions } from '../interfaces';
import { AuthenticatedUser } from '../interfaces/authenticated-user.interface';
import { CreatedByEntity, JoinTableEntity } from '../models';
import { AttributesOf } from '../types';
import { UpdateAssociationFillFunction } from '../types/update-association-fill-function.type';

export type UpdateAssociationSynchronousFillFunction<
    T extends JoinTableEntity | CreatedByEntity<T>,
    AuthenticatedUserType extends AuthenticatedUser = AuthenticatedUser,
    NewChildrenType = any
> = (
    ...params: Parameters<UpdateAssociationFillFunction<T, AuthenticatedUserType, NewChildrenType>>
) => AttributesOf<T>;

export function defaultUpdateManyToManyFillFunction<T extends CreatedByEntity<T>>(
    childForeignKey: keyof AttributesOf<T>
): UpdateAssociationSynchronousFillFunction<T, AuthenticatedUser, any> {
    return (
        newChild: CreatedByEntity<any>,
        _index: number,
        _existingRecord: T,
        updateOptions: UpdateManyToManyAssociationsOptions<T, AuthenticatedUser>
    ) => {
        const { parentForeignKey, parentInstanceId } = updateOptions;
        const newJoinTableRecord: AttributesOf<T> = {
            [childForeignKey]: newChild.id,
            [parentForeignKey]: parentInstanceId
        } as unknown as AttributesOf<T>;

        return newJoinTableRecord;
    };
}