// @vitest-environment jsdom
import {afterEach, beforeEach, describe, expect, it, vi} from 'vitest';
import {act, cleanup, fireEvent, render, screen, waitFor} from '@testing-library/react';
import {MemoryRouter, useLocation} from 'react-router-dom';
import App from './App.jsx';
import {PreferencesProvider} from './context/PreferencesContext.jsx';

vi.mock('react-i18next', () => import('./test/i18n-mock.js'));
vi.mock('./hooks/useLibrarySync.js', () => ({default: () => ({status: 'OK', lastSyncedAt: null, isRunning: false})}));
vi.mock('./hooks/useForceSync.js', () => ({default: () => ({trigger: vi.fn(), busy: false})}));

const DEBOUNCE_WAIT_MS = 700;
const b64 = (o) => btoa(JSON.stringify(o)).replace(/=+$/, '');
// Expired by the browser clock. A clock that runs ahead of the server makes the backend still accept it.
const EXPIRED_BY_LOCAL_CLOCK = `${b64({alg: 'EdDSA'})}.${b64({exp: Math.floor(Date.now() / 1000) - 60})}.sig`;
const page = {content: [{appid: 220, name: 'Half-Life 2', playtimeMinutes: 0, status: 'BACKLOG'}], page: 0, size: 20, totalElements: 1, totalPages: 1};

const wait = (ms) => act(() => new Promise((resolve) => setTimeout(resolve, ms)));

const current = {location: null};

function Spy() {
    current.location = useLocation();
    return null;
}

beforeEach(() => {
    localStorage.setItem('tbp_jwt', EXPIRED_BY_LOCAL_CLOCK);
    globalThis.fetch = vi.fn(async () => ({ok: true, status: 200, json: async () => page}));
});

afterEach(() => {
    cleanup();
    localStorage.clear();
});

describe('App', () => {
    it('keeps a token that only the browser clock calls expired; a 401 from the backend ends the session', async () => {
        render(
            <MemoryRouter initialEntries={['/library']}>
                <PreferencesProvider><App/><Spy/></PreferencesProvider>
            </MemoryRouter>,
        );
        await waitFor(() => expect(screen.getByText('Half-Life 2')).toBeTruthy());
        expect(localStorage.getItem('tbp_jwt')).toBe(EXPIRED_BY_LOCAL_CLOCK);

        fetch.mockImplementation(async () => ({ok: false, status: 401, json: async () => ({})}));
        fireEvent.change(screen.getByRole('searchbox'), {target: {value: 'half'}});
        await wait(DEBOUNCE_WAIT_MS);

        await waitFor(() => expect(current.location.pathname).toBe('/login'));
        expect(current.location.state).toEqual({sessionExpired: true, from: '/library?q=half&page=0'});
        expect(localStorage.getItem('tbp_jwt')).toBeNull();
    });
});