the-biergarten-app/web/frontend/stories/LoginForm.stories.tsx

import { zodResolver } from '@hookform/resolvers/zod';
import type { Meta, StoryObj } from '@storybook/react-vite';
import { useState } from 'react';
import { useForm } from 'react-hook-form';
import { expect, userEvent, within } from 'storybook/test';
import LoginForm from '../app/features/auth/components/LoginForm';
import { loginSchema, type LoginSchema } from '../app/features/auth/schemas';

const loginFormDescription = `Renders the real \`LoginForm\` component wired to the real \`loginSchema\` (zod) through the same react-hook-form setup used on the login page, so these stories validate actual client-side validation behavior rather than a re-implemented form.`;

const LoginFormHarness = () => {
    const [submitted, setSubmitted] = useState<LoginSchema | null>(null);
    const form = useForm<LoginSchema>({ resolver: zodResolver(loginSchema) });

    return (
        <div className="w-full max-w-md space-y-3 rounded-box bg-base-100 p-6 shadow-lg">
            <LoginForm
                onSubmit={form.handleSubmit((values) => setSubmitted(values))}
                formState={form.formState}
                register={form.register}
                submitting={false}
            />
            {submitted ? (
                <p data-testid="submit-result">Signed in as {submitted.username}</p>
            ) : null}
        </div>
    );
};

const meta = {
    title: 'Forms/LoginForm',
    component: LoginFormHarness,
    tags: ['autodocs'],
    parameters: {
        layout: 'centered',
        docs: {
            description: {
                component: loginFormDescription,
            },
        },
    },
} satisfies Meta<typeof LoginFormHarness>;

export default meta;
type Story = StoryObj<typeof meta>;

export const Empty: Story = {};

export const RejectsEmptySubmission: Story = {
    play: async ({ canvasElement }) => {
        const canvas = within(canvasElement);
        await userEvent.click(canvas.getByRole('button', { name: /sign in/i }));
        await expect(canvas.getByText(/username is required/i)).toBeInTheDocument();
        await expect(canvas.getByText(/password is required/i)).toBeInTheDocument();
        await expect(canvas.queryByTestId('submit-result')).not.toBeInTheDocument();
    },
};

export const AcceptsValidLogin: Story = {
    play: async ({ canvasElement }) => {
        const canvas = within(canvasElement);
        await userEvent.type(canvas.getByLabelText(/username/i), 'hans');
        await userEvent.type(canvas.getByLabelText(/password/i), 'correct-horse-battery');
        await userEvent.click(canvas.getByRole('button', { name: /sign in/i }));
        await expect(canvas.getByTestId('submit-result')).toHaveTextContent('hans');
    },
};