import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
import { parseArgv } from "../src/run.js";

describe("parseArgv", () => {
  let exitSpy: ReturnType<typeof vi.spyOn>;
  let _stderrSpy: ReturnType<typeof vi.spyOn>;

  beforeEach(() => {
    exitSpy = vi.spyOn(process, "exit").mockImplementation((() => {
      throw new Error("process.exit");
    }) as never);
    _stderrSpy = vi.spyOn(process.stderr, "write").mockImplementation((() => true) as never);
  });

  afterEach(() => {
    vi.restoreAllMocks();
  });

  it("returns threadId, role, prompt for valid argv", () => {
    const result = parseArgv([
      "node",
      "script",
      "--thread",
      "abc123",
      "--role",
      "developer",
      "--prompt",
      "do stuff",
    ]);
    expect(result).toEqual({ threadId: "abc123", role: "developer", prompt: "do stuff" });
  });

  it("exits when --thread is missing", () => {
    expect(() => parseArgv(["node", "script", "--role", "dev", "--prompt", "x"])).toThrow(
      "process.exit",
    );
    expect(exitSpy).toHaveBeenCalledWith(1);
  });

  it("exits when --role is missing", () => {
    expect(() => parseArgv(["node", "script", "--thread", "t1", "--prompt", "x"])).toThrow(
      "process.exit",
    );
    expect(exitSpy).toHaveBeenCalledWith(1);
  });

  it("exits when --prompt is missing", () => {
    expect(() => parseArgv(["node", "script", "--thread", "t1", "--role", "dev"])).toThrow(
      "process.exit",
    );
    expect(exitSpy).toHaveBeenCalledWith(1);
  });
});