import { basename, dirname, join } from '../filesystem/vaultFs';
import type { OpenDocRequest } from '../workspaces/workspace';

/** The open document a link is being followed *from*. */
export type LinkSource = {
  /** Provider the current document belongs to. */
  providerId: string;
  /** The current document's id/path (links resolve relative to its folder). */
  path: string;
};

/**
 * Resolve a relative markdown link target (e.g. `Note.md`, `sub/Note.md`)
 * against the document it was clicked in, producing an `OpenDocRequest` the
 * workspace can open. Resolution is a plain path join relative to the source
 * document's folder — callers pass external (scheme-bearing) targets elsewhere.
 */
export function resolveDocumentLink(
  source: LinkSource,
  target: string,
): OpenDocRequest {
  const entryId = join(dirname(source.path), target);
  return { providerId: source.providerId, entryId, title: basename(entryId) };
}