/**
 * Workspace → Temporal workflow-id resolution.
 *
 * A workspace name is not always its workflow id: a fresh named workspace gets
 * `<workspace>_shannon-<timestamp>` as its workflow id (only an auto-named workspace's
 * directory name equals its original id), and each resume spawns a new workflow
 * (`<workspace>_resume_<ts>`). The workspace's session.json records the authoritative
 * id — the latest resume attempt, or the original — so commands that query Temporal
 * (status, stop) resolve through here instead of assuming the name is the id.
 */

import fs from 'node:fs';
import path from 'node:path';
import { getWorkspacesDir } from './home.js';
import { resolveRunFile } from './paths.js';

/** Latest workflow id recorded for a workspace: last resume attempt, else the original. */
export function resolveWorkflowId(workspace: string): string | undefined {
  const sessionPath = resolveRunFile(path.join(getWorkspacesDir(), workspace), 'session.json');
  try {
    const session = JSON.parse(fs.readFileSync(sessionPath, 'utf-8'));
    const resumeAttempts: { workflowId?: string }[] = session.session?.resumeAttempts ?? [];
    return resumeAttempts.at(-1)?.workflowId ?? session.session?.originalWorkflowId ?? undefined;
  } catch {
    return undefined;
  }
}