import { beforeEach, describe, expect, it } from 'vitest';
import { screen } from '@testing-library/react';
import userEvent from '@testing-library/user-event';
import { renderApp, mockGuest } from '@/test/utils';
import { server } from '@/mocks/server';
import { setupUninitializedHandlers } from '@/mocks/index';
import { _resetSetupStatusCache } from '@/router';

// Reset module-level setup status cache before each test.
beforeEach(() => {
    _resetSetupStatusCache();
});

describe('InviteCompletePage', () => {
    it('shows a loading spinner on mount while validating the token', async () => {
        server.use(...setupUninitializedHandlers);
        mockGuest();
        renderApp('/invite/complete?token=valid-token');

        // Loading spinner should appear immediately.
        expect(await screen.findByTestId('invite-loading')).toBeInTheDocument();
    });

    it('shows an error state for an expired token', async () => {
        server.use(...setupUninitializedHandlers);
        mockGuest();
        renderApp('/invite/complete?token=expired-token');

        expect(await screen.findByTestId('invite-error')).toBeInTheDocument();
        expect(screen.queryByTestId('invite-name-input')).not.toBeInTheDocument();
    });

    it('shows an error state for a used token', async () => {
        server.use(...setupUninitializedHandlers);
        mockGuest();
        renderApp('/invite/complete?token=used-token');

        expect(await screen.findByTestId('invite-error')).toBeInTheDocument();
    });

    it('shows an error state when no token is provided', async () => {
        server.use(...setupUninitializedHandlers);
        mockGuest();
        renderApp('/invite/complete');

        expect(await screen.findByTestId('invite-error')).toBeInTheDocument();
    });

    it('shows the form with a read-only email for a valid token', async () => {
        server.use(...setupUninitializedHandlers);
        mockGuest();
        renderApp('/invite/complete?token=valid-token');

        expect(await screen.findByTestId('invite-name-input')).toBeInTheDocument();
        const emailInput = screen.getByTestId('invite-email-input') as HTMLInputElement;
        expect(emailInput.value).toBe('invited@example.com');
        expect(emailInput.disabled).toBe(true);
    });

    it('shows validation errors when submitting an empty form', async () => {
        server.use(...setupUninitializedHandlers);
        mockGuest();
        const user = userEvent.setup();
        renderApp('/invite/complete?token=valid-token');

        const submit = await screen.findByTestId('invite-submit-button');
        await user.click(submit);

        expect(await screen.findByTestId('invite-name-error')).toBeInTheDocument();
        expect(screen.getByTestId('invite-password-error')).toBeInTheDocument();
    });

    it('shows success message after a valid submission', async () => {
        server.use(...setupUninitializedHandlers);
        mockGuest();
        const user = userEvent.setup();
        renderApp('/invite/complete?token=valid-token');

        await user.type(await screen.findByTestId('invite-name-input'), 'Bob User');
        await user.type(screen.getByTestId('invite-password-input'), 'ValidPass1!');
        await user.type(screen.getByTestId('invite-confirmPassword-input'), 'ValidPass1!');
        await user.click(screen.getByTestId('invite-submit-button'));

        expect(await screen.findByTestId('invite-success')).toBeInTheDocument();
    });
});