import { test, expect, vi } from "vitest";
import { EventEmitter } from "node:events";
import { ThtRunner } from "../src/tht/tht-runner.js";

// Spy on child_process.spawn so we can capture the resolved argv (incl. -c config)
// that ThtRunner.run() builds, without launching a real process.
vi.mock("node:child_process", () => ({
  spawn: vi.fn(() => {
    const ch: any = new EventEmitter();
    ch.stdout = new EventEmitter();
    ch.stderr = new EventEmitter();
    queueMicrotask(() => {
      ch.stdout.emit("data", Buffer.from('{"id":"x"}'));
      ch.emit("close", 0);
    });
    return ch;
  }),
}));
import { spawn } from "node:child_process";

test("sessionNew parses id from JSON", async () => {
  const r = new ThtRunner({ thtBin: "tht", harnessDir: "/h", configPath: "config/tht.yaml" });
  r.run = async () => ({ code: 0, stdout: '{"id":"2026-06-27-100000-x"}', stderr: "" });
  expect(await r.sessionNew({ question: "q" })).toEqual({ id: "2026-06-27-100000-x" });
});

test("run with exit != 0 propagates error with stderr", async () => {
  const r = new ThtRunner({ thtBin: "tht", harnessDir: "/h", configPath: "config/tht.yaml" });
  r.run = async () => ({ code: 1, stdout: "", stderr: "ERRORE: boom" });
  await expect(r.sessionList()).rejects.toThrow(/boom/);
});

test("sessionNew with missing workspace file falls back to default configPath argv", async () => {
  // harnessDir "/nope" has no workspaces/foo.yaml -> configArg falls back to default.
  (spawn as any).mockClear();
  const r = new ThtRunner({ thtBin: "tht", harnessDir: "/nope", configPath: "config/tht.yaml" });
  await r.sessionNew({ question: "q", workspace: "foo" });
  const [bin, argv] = (spawn as any).mock.calls[0];
  expect(bin).toBe("tht");
  expect(argv).toEqual(["-c", "config/tht.yaml", "session", "new", "q", "--json"]);
});