/**
 * @file runWorktree.ts
 * @description Which `claude --worktree` session the Workspace's Changes panel
 * follows for the URL's `?run=` pane. A poll that misses the run (one bad read
 * lists no runs) keeps the last answer instead of moving the panel to the main
 * folder — which, while it holds an unsaved edit, asked to discard it out of
 * nowhere.
 * @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
 */

export interface RunWorktree {
  run: string;
  session: string;
}

/**
 * @param prev The previous answer.
 * @param runParam The URL's `?run=`.
 * @param opened That run in the latest list, if the list had it.
 */
export function runWorktreeSession(
  prev: RunWorktree | null,
  runParam: string | null,
  opened: { worktree?: boolean; sessionId: string | null } | undefined
): RunWorktree | null {
  if (!runParam) return null;
  if (!opened) return prev?.run === runParam ? prev : null;
  return opened.worktree && opened.sessionId ? { run: runParam, session: opened.sessionId } : null;
}