import { describe, it, expect } from "vitest";
import { EMPTY_THREAD_CORE } from "../runtimes/remote-thread-list/empty-thread-core";

describe("EMPTY_THREAD_CORE", () => {
  it("has isLoading=true so it is not mistaken for an empty conversation", () => {
    expect(EMPTY_THREAD_CORE.isLoading).toBe(true);
  });

  it("has empty messages", () => {
    expect(EMPTY_THREAD_CORE.messages).toEqual([]);
  });

  it("does not trigger isEmpty (messages.length === 0 && !isLoading)", () => {
    const isEmpty =
      EMPTY_THREAD_CORE.messages.length === 0 && !EMPTY_THREAD_CORE.isLoading;
    expect(isEmpty).toBe(false);
  });

  it("all capabilities are disabled", () => {
    const caps = EMPTY_THREAD_CORE.capabilities;
    expect(caps.edit).toBe(false);
    expect(caps.reload).toBe(false);
    expect(caps.cancel).toBe(false);
    expect(caps.speech).toBe(false);
    expect(caps.attachments).toBe(false);
  });

  it("mutating methods throw", () => {
    expect(() => EMPTY_THREAD_CORE.append({} as any)).toThrow();
    expect(() => EMPTY_THREAD_CORE.startRun({} as any)).toThrow();
    expect(() => EMPTY_THREAD_CORE.cancelRun()).toThrow();
  });
});