/**
 * A single property handler for FindOptionsRelations.
 */
export type FindOptionsRelationsProperty<Property> = Property extends Promise<infer I>
	? FindOptionsRelationsProperty<NonNullable<I>> | boolean
	: Property extends Array<infer I>
		? FindOptionsRelationsProperty<NonNullable<I>> | boolean
		: Property extends string
			? never
			: Property extends number
				? never
				: Property extends boolean
					? never
					: Property extends Function
						? never
						: Property extends Buffer
							? never
							: Property extends Date
								? never
								: Property extends object
									? FindOptionsRelations<Property> | boolean
									: boolean;

/**
 * Relations find options.
 */
export type FindOptionsRelations<Entity> = {
	[P in keyof Entity]?: P extends 'toString'
		? unknown
		: FindOptionsRelationsProperty<NonNullable<Entity[P]>>;
};

/**
 * Relation names to be selected by "relation" defined as string.
 * Old relation mechanism in TypeORM.
 *
 * @deprecated will be removed in the next version, use FindOptionsRelation type notation instead
 */
export type FindOptionsRelationByString = string[];