import { test, expect, vi } from "vitest";
import { EventEmitter } from "node:events";

// Mock node:child_process so the PRODUCTION spawnFn (no injected spawnFn) is exercised
// without launching a real pi. Per-file mock — kept out of pi-process-manager.test.ts,
// which deliberately spawns the real fake_pi.
vi.mock("node:child_process", () => ({
  spawn: vi.fn(() => {
    const ch: any = new EventEmitter();
    ch.stdout = new EventEmitter();
    ch.stderr = new EventEmitter();
    ch.stderr.resume = () => {};
    ch.stdin = { write: () => true };
    ch.kill = () => {};
    return ch;
  }),
}));
import { spawn as nodeSpawn } from "node:child_process";
import { PiProcessManager } from "../src/pi/pi-process-manager.js";
import { loadConfig } from "../src/config.js";

test("production spawnFn launches `pi --mode rpc` with no --approve (pi 0.73 dropped it)", async () => {
  (nodeSpawn as any).mockClear();
  // loadConfig({}) leaves provider/model/thinking unset → spawnFor skips the rpc
  // handshake and just spawns + sends the prompt, so the mocked child never hangs.
  const cfg = loadConfig({});
  const mgr = new PiProcessManager(cfg); // NO injected spawnFn → uses the production spawnFn
  await mgr.spawnFor("s1", {});
  const [bin, args] = (nodeSpawn as any).mock.calls[0];
  expect(bin).toBe(cfg.piBin);
  expect(args).toEqual(["--mode", "rpc"]);
  expect(args).not.toContain("--approve");
  mgr.teardown("s1");
});