import { beforeEach, describe, expect, it } from 'vitest';
import { screen } from '@testing-library/react';
import userEvent from '@testing-library/user-event';
import { http, HttpResponse } from 'msw';
import { renderApp, mockAuthenticated } from '@/test/utils';
import { server } from '@/mocks/server';
import { API_BASE } from '@/mocks/auth/fixtures';
import { _resetSetupStatusCache } from '@/router';

beforeEach(() => {
    _resetSetupStatusCache();
});

async function openDialog() {
    mockAuthenticated();
    renderApp('/users');
    await screen.findByTestId('users-invite-button', {}, { timeout: 10000 });
    await userEvent.click(screen.getByTestId('users-invite-button'));
    expect(screen.getByTestId('invite-dialog-email')).toBeInTheDocument();
}

describe('InviteUserDialog', () => {
    it('shows email and role fields on open', async () => {
        await openDialog();
        expect(screen.getByTestId('invite-dialog-email')).toBeInTheDocument();
        expect(screen.getByTestId('invite-dialog-role')).toBeInTheDocument();
        expect(screen.getByTestId('invite-dialog-submit')).toBeInTheDocument();
    });

    it('shows validation error when submitting with empty email', async () => {
        await openDialog();
        await userEvent.click(screen.getByTestId('invite-dialog-submit'));
        expect(await screen.findByTestId('invite-email-error')).toBeInTheDocument();
    });

    it('shows validation error when submitting without selecting a role', async () => {
        await openDialog();
        await userEvent.type(screen.getByTestId('invite-dialog-email'), 'new@example.com');
        await userEvent.click(screen.getByTestId('invite-dialog-submit'));
        expect(await screen.findByTestId('invite-role-error')).toBeInTheDocument();
    });

    it('advances to step 2 (invite link) after successful submission', async () => {
        await openDialog();

        await userEvent.type(screen.getByTestId('invite-dialog-email'), 'new@example.com');

        // Open role dropdown and select "User" (use role=option to avoid ambiguity)
        await userEvent.click(screen.getByTestId('invite-dialog-role'));
        const options = await screen.findAllByRole('option');
        const userOption = options.find((o) => o.textContent === 'User');
        await userEvent.click(userOption!);

        await userEvent.click(screen.getByTestId('invite-dialog-submit'));

        expect(await screen.findByTestId('invite-dialog-link-input')).toBeInTheDocument();
        expect(screen.getByTestId('invite-dialog-copy')).toBeInTheDocument();
    });

    it('shows error banner when API returns 400', async () => {
        server.use(
            http.post(`${API_BASE}/api/v1/Users/invite`, () =>
                HttpResponse.json({ detail: 'User already exists.' }, { status: 400 }),
            ),
        );
        await openDialog();

        await userEvent.type(screen.getByTestId('invite-dialog-email'), 'dup@example.com');
        await userEvent.click(screen.getByTestId('invite-dialog-role'));
        const opts = await screen.findAllByRole('option');
        const userOpt = opts.find((o) => o.textContent === 'User');
        await userEvent.click(userOpt!);
        await userEvent.click(screen.getByTestId('invite-dialog-submit'));

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

    it('resets to step 1 when dialog is closed and reopened', async () => {
        await openDialog();
        await userEvent.type(screen.getByTestId('invite-dialog-email'), 'test@example.com');

        // Close the dialog by pressing Escape
        await userEvent.keyboard('{Escape}');

        // Reopen
        await userEvent.click(screen.getByTestId('users-invite-button'));
        const emailInput = screen.getByTestId('invite-dialog-email') as HTMLInputElement;
        expect(emailInput.value).toBe('');
    });
});