import { test } from "node:test";
import assert from "node:assert/strict";
import { api } from "../lib/client-api";

test("API sends explicit falsy JSON bodies and prevents cached private responses", async (t) => {
  const fetch = t.mock.method(
    globalThis,
    "fetch",
    async (_url: unknown, options: RequestInit) => {
      assert.equal(options.method, "POST");
      assert.equal(options.body, "false");
      assert.equal(options.cache, "no-store");
      return Response.json({ ok: true });
    },
  );
  assert.deepEqual(await api("test", false), { ok: true });
  assert.equal(fetch.mock.callCount(), 1);
});

test("API explains HTML gateway failures, JSON errors, and empty error responses", async (t) => {
  const fetch = t.mock.method(
    globalThis,
    "fetch",
    async () => new Response("Bad gateway", { status: 502 }),
  );
  await assert.rejects(api("test"), /unreadable response/);
  fetch.mock.mockImplementation(async () =>
    Response.json({ error: "Map unavailable" }, { status: 404 }),
  );
  await assert.rejects(api("test"), /Map unavailable/);
  fetch.mock.mockImplementation(async () =>
    Response.json(null, { status: 503 }),
  );
  await assert.rejects(api("test"), /Request failed/);
});

test("API reports timeouts and offline connections with a recovery action", async (t) => {
  const fetch = t.mock.method(globalThis, "fetch", async () => {
    throw new DOMException("timeout", "TimeoutError");
  });
  await assert.rejects(api("test"), /timed out.*Reconnect/);
  fetch.mock.mockImplementation(async () => {
    throw new TypeError("Failed to fetch");
  });
  await assert.rejects(api("test"), /Check your connection/);
});