// The add-on's answers: what a failed request says to the person using the page.
import { afterEach, describe, expect, it, vi } from "vitest";
import { getJson, send } from "../src/api";

const answer = (status: number, body: string, type = "application/json") =>
  vi.stubGlobal("fetch", vi.fn(async () => new Response(body, { status, headers: { "Content-Type": type } })));

afterEach(() => vi.unstubAllGlobals());

describe("api", () => {
  it("shows the add-on's own sentence for any failed answer with a JSON error (app 0.2.78)", async () => {
    answer(400, JSON.stringify({ error: "Home Assistant refused light.turn_on: the entity is unavailable." }));
    await expect(send("screens/x", "PUT", {})).rejects.toThrow("Home Assistant refused light.turn_on: the entity is unavailable.");
    answer(503, JSON.stringify({ error: "Home Assistant didn't answer in time. Try again in a moment." }));
    await expect(getJson("capabilities?entity=light.a")).rejects.toThrow("Home Assistant didn't answer in time. Try again in a moment.");
    answer(502, JSON.stringify({ error: "Bad gateway from Home Assistant." }));
    await expect(getJson("states")).rejects.toThrow("Bad gateway from Home Assistant.");
  });
  it("keeps the general sentence for an answer that isn't JSON or has no error in it", async () => {
    const general = "That didn't work. Refresh the page and try again.";
    answer(502, "<html><body>502 Bad Gateway</body></html>", "text/html");
    await expect(getJson("inventory")).rejects.toThrow(general);
    answer(500, JSON.stringify({ detail: "nope" }));
    await expect(getJson("inventory")).rejects.toThrow(general);
    answer(500, JSON.stringify({ error: "" }));
    await expect(getJson("inventory")).rejects.toThrow(general);
  });
  it("sends relative URLs with the CSRF header and reads an empty answer as null", async () => {
    answer(200, "");
    expect(await send("screens/x/identify", "POST")).toBeNull();
    const call = (fetch as unknown as ReturnType<typeof vi.fn>).mock.calls[0];
    expect(call[0]).toBe("api/screens/x/identify");
    expect(call[1].headers).toHaveProperty("X-Screen-CSRF");
  });
});