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

import createMockRes from "test-utils/create-mock-res";

const { httpProxy, getServiceWidget, cache, logger } = vi.hoisted(() => {
  const store = new Map();

  return {
    httpProxy: vi.fn(),
    getServiceWidget: vi.fn(),
    cache: {
      get: vi.fn((k) => store.get(k)),
      put: vi.fn((k, v) => store.set(k, v)),
      del: vi.fn((k) => store.delete(k)),
      _reset: () => store.clear(),
    },
    logger: {
      debug: vi.fn(),
      error: vi.fn(),
    },
  };
});

vi.mock("utils/logger", () => ({
  default: () => logger,
}));

vi.mock("utils/config/service-helpers", () => ({
  default: getServiceWidget,
}));

vi.mock("utils/proxy/http", () => ({
  httpProxy,
}));

vi.mock("memory-cache", () => ({
  default: cache,
  ...cache,
}));

vi.mock("widgets/widgets", () => ({
  default: {
    kavita: {
      api: "{url}/{endpoint}",
    },
  },
}));

import kavitaProxyHandler from "./proxy";

describe("widgets/kavita/proxy", () => {
  beforeEach(() => {
    vi.clearAllMocks();
    cache._reset();
  });

  it("logs in and returns server stats", async () => {
    getServiceWidget.mockResolvedValue({ type: "kavita", url: "http://kv", username: "u", password: "p" });

    httpProxy
      .mockResolvedValueOnce([200, "application/json", Buffer.from(JSON.stringify({ token: "tok" }))])
      .mockResolvedValueOnce([
        200,
        "application/json",
        Buffer.from(JSON.stringify({ seriesCount: 5, totalFiles: 100 })),
      ]);

    const req = { query: { group: "g", service: "svc", index: "0" } };
    const res = createMockRes();

    await kavitaProxyHandler(req, res);

    expect(httpProxy).toHaveBeenCalledTimes(2);
    expect(res.statusCode).toBe(200);
    expect(res.body).toEqual({ seriesCount: 5, totalFiles: 100 });
  });

  it("retries after a 401 by obtaining a new session token", async () => {
    cache.put("kavitaProxyHandler__sessionToken.svc", "old");

    getServiceWidget.mockResolvedValue({ type: "kavita", url: "http://kv", username: "u", password: "p" });

    httpProxy
      .mockResolvedValueOnce([401, "application/json", Buffer.from("{}")])
      .mockResolvedValueOnce([200, "application/json", Buffer.from(JSON.stringify({ token: "newtok" }))])
      .mockResolvedValueOnce([200, "application/json", Buffer.from(JSON.stringify({ seriesCount: 1, totalFiles: 2 }))]);

    const req = { query: { group: "g", service: "svc", index: "0" } };
    const res = createMockRes();

    await kavitaProxyHandler(req, res);

    const loginCalls = httpProxy.mock.calls.filter(([url]) => url.toString().includes("Account/login"));
    expect(loginCalls).toHaveLength(1);
    expect(res.body).toEqual({ seriesCount: 1, totalFiles: 2 });
  });
});