/**
 * Enumerated set of HTTP Patch operations
 */
export abstract class PatchOpType {
	public static readonly ADD: 'add' = 'add';
	public static readonly REMOVE: 'remove' = 'remove';
	public static readonly REPLACE: 'replace' = 'replace';
	public static readonly COPY: 'copy' = 'copy';
	public static readonly MOVE: 'move' = 'move';
	public static readonly TEST: 'test' = 'test';
}

type PatchOpTypes = 'add' | 'remove' | 'replace' | 'copy' | 'move' | 'test';

/**
 * HTTP Patch operations
 */
export type PatchOp<T extends PatchOpTypes> = {
	op: T;
	path: string;
} & (
	T extends 'move'
		? { from: string }
		: T extends 'copy'
			? { from: string }
			: { }
) & (
	T extends 'add'
		? { value: any }
		: T extends 'replace'
			? { value: any }
			: T extends 'test'
				? { value: string }
				: { }
);

/**
 * Expected payload for an HTTP Patch request
 */
export type PatchPayload = (
	PatchOp<'add'> |
	PatchOp<'replace'> |
	PatchOp<'remove'> |
	PatchOp<'copy'> |
	PatchOp<'move'> |
	PatchOp<'test'>
)[];