import { afterEach, describe, expect, it, vi } from "vitest";
import { resetTelegramFetchStateForTests, resolveTelegramFetch } from "./fetch.js";

const setDefaultAutoSelectFamily = vi.hoisted(() => vi.fn());

vi.mock("node:net", async () => {
  const actual = await vi.importActual<typeof import("node:net")>("node:net");
  return {
    ...actual,
    setDefaultAutoSelectFamily,
  };
});

const originalFetch = globalThis.fetch;

afterEach(() => {
  resetTelegramFetchStateForTests();
  setDefaultAutoSelectFamily.mockReset();
  vi.unstubAllEnvs();
  vi.clearAllMocks();
  if (originalFetch) {
    globalThis.fetch = originalFetch;
  } else {
    delete (globalThis as { fetch?: typeof fetch }).fetch;
  }
});

describe("resolveTelegramFetch", () => {
  it("returns wrapped global fetch when available", async () => {
    const fetchMock = vi.fn(async () => ({}));
    globalThis.fetch = fetchMock as unknown as typeof fetch;
    const resolved = resolveTelegramFetch();
    expect(resolved).toBeTypeOf("function");
  });

  it("prefers proxy fetch when provided", async () => {
    const fetchMock = vi.fn(async () => ({}));
    const resolved = resolveTelegramFetch(fetchMock as unknown as typeof fetch);
    expect(resolved).toBeTypeOf("function");
  });

  it("honors env enable override", async () => {
    vi.stubEnv("OPENCLAW_TELEGRAM_ENABLE_AUTO_SELECT_FAMILY", "1");
    globalThis.fetch = vi.fn(async () => ({})) as unknown as typeof fetch;
    resolveTelegramFetch();
    expect(setDefaultAutoSelectFamily).toHaveBeenCalledWith(true);
  });

  it("uses config override when provided", async () => {
    globalThis.fetch = vi.fn(async () => ({})) as unknown as typeof fetch;
    resolveTelegramFetch(undefined, { network: { autoSelectFamily: true } });
    expect(setDefaultAutoSelectFamily).toHaveBeenCalledWith(true);
  });

  it("env disable override wins over config", async () => {
    vi.stubEnv("OPENCLAW_TELEGRAM_ENABLE_AUTO_SELECT_FAMILY", "0");
    vi.stubEnv("OPENCLAW_TELEGRAM_DISABLE_AUTO_SELECT_FAMILY", "1");
    globalThis.fetch = vi.fn(async () => ({})) as unknown as typeof fetch;
    resolveTelegramFetch(undefined, { network: { autoSelectFamily: true } });
    expect(setDefaultAutoSelectFamily).toHaveBeenCalledWith(false);
  });
});