import { describe, it, expect, vi, beforeEach, afterEach } from "vitest";

vi.mock("@/api/driver", () => ({
  getPushKey: vi.fn(async () => ({ key: "BIIh_RELLY", enabled: true })),
  subscribePush: vi.fn(async () => ({ ok: true })),
  unsubscribePush: vi.fn(async () => ({ ok: true })),
}));

import { currentState, enable, supported } from "./push";
import * as api from "@/api/driver";

const SUB = {
  endpoint: "https://fcm.googleapis.com/fcm/send/abc",
  toJSON: () => ({
    endpoint: "https://fcm.googleapis.com/fcm/send/abc",
    keys: { p256dh: "p256", auth: "auth" },
  }),
  unsubscribe: vi.fn(async () => true),
};

function stubBrowser(opts: {
  permission?: NotificationPermission;
  existing?: unknown;
  ios?: boolean;
  standalone?: boolean;
} = {}) {
  const perm = opts.permission ?? "default";
  const registration = {
    pushManager: {
      getSubscription: vi.fn(async () => opts.existing ?? null),
      subscribe: vi.fn(async () => SUB),
    },
  };
  vi.stubGlobal("navigator", {
    serviceWorker: {
      getRegistration: vi.fn(async () => registration),
      ready: Promise.resolve(registration),
    },
    userAgent: opts.ios ? "iPhone" : "Android Chrome",
    standalone: opts.standalone,
  });
  const notification = {
    permission: perm,
    requestPermission: vi.fn(async () => (opts.permission === "denied" ? "denied" : "granted")),
  };
  // Notification обязан лежать И в window: supported() проверяет именно его —
  // так же, как это делает браузер.
  vi.stubGlobal("window", {
    PushManager: function () {},
    Notification: notification,
    matchMedia: () => ({ matches: !!opts.standalone }),
  });
  vi.stubGlobal("Notification", notification);
  return registration;
}

describe("уведомления в приложении", () => {
  beforeEach(() => vi.clearAllMocks());
  afterEach(() => vi.unstubAllGlobals());

  it("iPhone без установки на экран: объясняем, а не молчим", async () => {
    vi.stubGlobal("navigator", { userAgent: "iPhone", standalone: false });
    vi.stubGlobal("window", { matchMedia: () => ({ matches: false }) });
    expect(supported()).toBe(false);
    expect(await currentState()).toBe("needs-install");
  });

  it("разрешение отклонено — переспросить нечем", async () => {
    stubBrowser({ permission: "denied" });
    expect(await currentState()).toBe("denied");
  });

  it("подписка уходит на сервер с ключами из браузера", async () => {
    stubBrowser();
    expect(await enable()).toBe("on");
    expect(api.subscribePush).toHaveBeenCalledWith({
      endpoint: "https://fcm.googleapis.com/fcm/send/abc",
      p256dh: "p256",
      auth: "auth",
    });
  });

  it("сервер не настроен — разрешение НЕ спрашиваем", async () => {
    // Единственная попытка на установку: потратить её впустую нельзя.
    vi.mocked(api.getPushKey).mockResolvedValueOnce({ key: "", enabled: false });
    stubBrowser();
    expect(await enable()).toBe("off");
    expect(Notification.requestPermission).not.toHaveBeenCalled();
    expect(api.subscribePush).not.toHaveBeenCalled();
  });
});