// @vitest-environment jsdom
import {afterEach, beforeEach, describe, expect, it, vi} from 'vitest';
import {act, cleanup, fireEvent, screen, waitFor} from '@testing-library/react';
import {useEffect} from 'react';
import {toast} from 'sonner';
import WelcomePage from './WelcomePage.jsx';
import WelcomeGate from '../components/WelcomeGate.jsx';
import {useCurrentUserContext} from '../context/CurrentUserContext.jsx';
import {fetchRoutes, json} from '../test/fetchRoutes.js';
import {renderWithProviders} from '../test/renderWithProviders.jsx';

vi.mock('react-i18next', () => import('../test/i18n-mock.js'));
vi.mock('sonner', () => ({toast: {error: vi.fn()}}));

const me = (overrides = {}) => ({id: 1, email: 'a@b.de', role: 'USER', steamId: null,
    settings: {welcomeSeenAt: null}, ...overrides});
const putCalls = () => fetch.mock.calls.filter(([, init]) => init?.method === 'PUT');

const renderPage = async ({user = me(), summary = json(200, {total: 0}), seen = json(204)} = {}) => {
    fetchRoutes({
        'GET /api/users/me': json(200, user),
        'GET /api/library/summary': summary,
        'PUT /api/users/settings/welcome-seen': seen,
    });
    const result = renderWithProviders(<WelcomePage/>, {
        path: '/welcome', entries: ['/welcome'], routes: {'/dashboard': <p>dashboard</p>},
    });
    await act(async () => undefined);
    return result;
};

describe('WelcomePage', () => {
    beforeEach(() => localStorage.setItem('tbp_session', '1'));

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

    it('shows six feature cards, five of them with a link to their page', async () => {
        await renderPage();

        expect(screen.getAllByRole('heading', {level: 2})).toHaveLength(6);
        expect(screen.getAllByRole('link', {name: 'WELCOME.OPEN'}).map((link) => link.getAttribute('href')))
            .toEqual(['/library', '/library', '/stats', '/settings', '/import']);
    });

    it('checks the steps that are done', async () => {
        await renderPage({user: me({steamId: '7656'}), summary: json(200, {total: 1})});

        expect(await screen.findAllByText('WELCOME.DONE')).toHaveLength(2);
    });

    it('checks nothing for a new user without games', async () => {
        await renderPage();

        expect(screen.queryByText('WELCOME.DONE')).toBeNull();
    });

    it('renders without checks when the summary fails', async () => {
        await renderPage({summary: json(500, {})});

        expect(screen.getByText('WELCOME.TITLE')).toBeTruthy();
        expect(screen.queryByText('WELCOME.DONE')).toBeNull();
    });

    it.each(['WELCOME.GO', 'WELCOME.SKIP'])('"%s" stamps once and opens the dashboard', async (label) => {
        const {router} = await renderPage();

        fireEvent.click(screen.getByText(label));

        await waitFor(() => expect(router.state.location.pathname).toBe('/dashboard'));
        expect(putCalls().map(([url]) => url)).toEqual([expect.stringContaining('/api/users/settings/welcome-seen')]);
    });

    it('still opens the dashboard, silently, when the stamp fails', async () => {
        const {router} = await renderPage({seen: json(500, {})});

        fireEvent.click(screen.getByText('WELCOME.GO'));

        await waitFor(() => expect(router.state.location.pathname).toBe('/dashboard'));
        expect(toast.error).not.toHaveBeenCalled();
    });

    it('staysOnTheDashboardWhenItReloadsTheUserBeforeTheStampLands', async () => {
        let stamped = false;
        function DashboardStub() {
            const {reload} = useCurrentUserContext();
            useEffect(() => { reload(); }, [reload]);
            return <p>dashboard</p>;
        }
        fetchRoutes({
            'GET /api/users/me': () => json(200, me({settings: {welcomeSeenAt: stamped ? '2026-10-01T10:00:00Z' : null}})),
            'GET /api/library/summary': json(200, {total: 0}),
            'PUT /api/users/settings/welcome-seen': () => new Promise((resolve) => setTimeout(() => {
                stamped = true;
                resolve(json(204));
            }, 20)),
        });
        const {router} = renderWithProviders(<WelcomePage/>, {
            path: '/welcome', entries: ['/welcome'],
            routes: {'/dashboard': <WelcomeGate><DashboardStub/></WelcomeGate>},
        });
        await screen.findByText('WELCOME.TITLE');

        fireEvent.click(screen.getByText('WELCOME.GO'));

        await waitFor(() => expect(stamped).toBe(true));
        await act(async () => new Promise((resolve) => setTimeout(resolve, 30)));
        expect(router.state.location.pathname).toBe('/dashboard');
    });

    it('sendsTheStampWithATimeout', async () => {
        await renderPage({seen: () => new Promise(() => undefined)});

        fireEvent.click(screen.getByText('WELCOME.GO'));

        await waitFor(() => expect(putCalls()).toHaveLength(1));
        expect(putCalls()[0][1].signal).toBeInstanceOf(AbortSignal);
    });
});