/**
 * @file AuthGate.test.tsx
 * @description The login gate: local mode renders the app untouched, server
 * mode shows the login page until a login succeeds, a wrong password says so,
 * and a later 401 `EAUTH` brings the login page back. `usePermissions` and
 * `useWorkLanes` mirror the server's roles: an admin changes everything, an
 * analyst reads everything but works only in their own workspaces, a
 * developer only ever sees (and so changes) their own. The login page wears the
 * OS's light/dark; a sign-in swaps in the account's saved appearance.
 * @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
 */

import { describe, it, expect, vi, beforeEach } from "vitest";
import { act, cleanup, render, screen, waitFor } from "@testing-library/react";
import userEvent from "@testing-library/user-event";
import "../../i18n";

const me = vi.fn();
const login = vi.fn();
const prefs = vi.fn();
const LANES = [
  { id: 1, owner_id: 5 },
  { id: 2, owner_id: 6 },
];
vi.mock("../../lib/api", () => ({
  AUTH_REQUIRED_EVENT: "agenthub:auth-required",
  api: {
    auth: { me: () => me(), login: (u: string, p: string) => login(u, p), logout: vi.fn() },
    lanes: { list: () => Promise.resolve({ lanes: LANES }) },
    me: { prefs: () => prefs(), savePrefs: () => Promise.resolve({ prefs: {} }) },
  },
}));

import { AuthGate, usePermissions } from "../AuthGate";
import { useWorkLanes } from "../../hooks/useLanes";

function Probe() {
  const p = usePermissions();
  const { lanes } = useWorkLanes();
  return (
    <p>
      {[
        `admin:${p.isAdmin}`,
        `all:${p.seesAll}`,
        `mine:${p.canEditLane({ owner_id: 5 })}`,
        `theirs:${p.canEditLane({ owner_id: 6 })}`,
        `work:${lanes.map((l) => l.id).join(",")}`,
      ].join(" ")}
    </p>
  );
}

const user = { id: 1, username: "mia", role: "developer" };

beforeEach(() => {
  me.mockReset();
  login.mockReset();
  prefs.mockReset().mockResolvedValue({ prefs: {} });
  localStorage.clear();
});

describe("AuthGate", () => {
  it("renders the app in local mode", async () => {
    me.mockResolvedValue({ mode: "local" });
    render(<AuthGate>app</AuthGate>);
    expect(await screen.findByText("app")).toBeInTheDocument();
  });

  it("paints at once in a browser that last saw local mode", () => {
    localStorage.setItem("agenthub.authMode", "local");
    me.mockReturnValue(new Promise(() => {}));
    render(<AuthGate>app</AuthGate>);
    expect(screen.getByText("app")).toBeInTheDocument();
  });

  it("asks again instead of guessing when the server does not answer", async () => {
    vi.useFakeTimers({ shouldAdvanceTime: true });
    try {
      me.mockRejectedValueOnce(new Error("502"));
      me.mockResolvedValue({ mode: "server", user: null });
      render(<AuthGate>app</AuthGate>);
      expect(screen.queryByText("app")).toBeNull();
      await act(async () => {
        await vi.advanceTimersByTimeAsync(2100);
      });
      expect(await screen.findByLabelText(/username/i)).toBeInTheDocument();
      expect(screen.queryByText("app")).toBeNull();
    } finally {
      vi.useRealTimers();
    }
  });

  it("renders the app when an older server or a dashboard token answers instead", async () => {
    for (const err of [
      { status: 404 },
      { status: 200, code: "EBADRESPONSE" },
      { status: 401, code: "EUNAUTHORIZED" },
    ]) {
      me.mockReset();
      me.mockRejectedValue(Object.assign(new Error("x"), err));
      const { unmount } = render(<AuthGate>app</AuthGate>);
      expect(await screen.findByText("app")).toBeInTheDocument();
      unmount();
    }
  });

  it("asks for a login in server mode and opens the app after one", async () => {
    me.mockResolvedValue({ mode: "server", user: null });
    login.mockRejectedValueOnce(Object.assign(new Error("x"), { code: "EBADLOGIN" }));
    login.mockResolvedValueOnce({ user });
    render(<AuthGate>app</AuthGate>);

    const name = await screen.findByLabelText(/username/i);
    const pass = screen.getByLabelText(/^password$/i);
    await userEvent.type(name, "mia");
    await userEvent.type(pass, "nope");
    await userEvent.click(screen.getByRole("button", { name: /sign in/i }));
    expect(await screen.findByRole("alert")).toBeInTheDocument();
    expect(screen.queryByText("app")).toBeNull();

    await userEvent.type(pass, "member-pass-1");
    await userEvent.click(screen.getByRole("button", { name: /sign in/i }));
    expect(await screen.findByText("app")).toBeInTheDocument();
    expect(login).toHaveBeenLastCalledWith("mia", "member-pass-1");

    act(() => {
      window.dispatchEvent(new Event("agenthub:auth-required"));
    });
    expect(await screen.findByLabelText(/username/i)).toBeInTheDocument();
  });
});

describe("AuthGate theme", () => {
  it("wears the OS theme while signed out and the account's own once signed in", async () => {
    const html = document.documentElement;
    // The previous user's choice, left in this browser.
    localStorage.setItem("theme", "dark");
    localStorage.setItem("agenthub.theme.dark", "darcula");
    const mq = { matches: false, addEventListener: vi.fn(), removeEventListener: vi.fn() };
    vi.stubGlobal("matchMedia", () => mq); // the OS is light
    me.mockResolvedValue({ mode: "server", user: null });
    prefs.mockResolvedValue({ prefs: { theme: "dark", "agenthub.theme.dark": "orca-dark" } });
    login.mockResolvedValue({ user });
    render(<AuthGate>app</AuthGate>);

    await userEvent.type(await screen.findByLabelText(/username/i), "mia");
    expect(html.dataset.mode).toBe("light");
    expect(html.hasAttribute("data-theme")).toBe(false);

    await userEvent.type(screen.getByLabelText(/^password$/i), "member-pass-1");
    await userEvent.click(screen.getByRole("button", { name: /sign in/i }));
    await waitFor(() => expect(html.dataset.theme).toBe("orca-dark"));
    expect(html.dataset.mode).toBe("dark");
    expect(localStorage.getItem("agenthub.theme.dark")).toBe("orca-dark");
    vi.unstubAllGlobals();
  });
});

describe("usePermissions / useWorkLanes", () => {
  const as = async (state: unknown) => {
    cleanup();
    me.mockResolvedValue(state);
    render(
      <AuthGate>
        <Probe />
      </AuthGate>
    );
    return (await screen.findByText(/work:\d/)).textContent;
  };

  it("lets an admin and local mode do everything", async () => {
    for (const state of [
      { mode: "local" },
      { mode: "server", user: { id: 9, username: "boss", role: "admin" } },
    ]) {
      expect(await as(state)).toBe("admin:true all:true mine:true theirs:true work:1,2");
    }
  });

  it("lets an analyst read everything but work only in their own workspaces", async () => {
    expect(await as({ mode: "server", user: { id: 5, username: "ana", role: "analyst" } })).toBe(
      "admin:false all:true mine:true theirs:false work:1"
    );
  });

  it("lets a developer act on everything they can see, and nothing host-wide", async () => {
    expect(await as({ mode: "server", user: { id: 5, username: "mia", role: "developer" } })).toBe(
      "admin:false all:false mine:true theirs:true work:1,2"
    );
  });
});