import { describe, expect, it, vi, afterEach } from 'vitest';
import { cleanup, render } from 'vitest-browser-svelte';
import { page } from 'vitest/browser';
import DisambiguationPicker from './DisambiguationPicker.svelte';
import type { components } from '$lib/generated/api';

type PersonHint = components['schemas']['PersonHint'];

afterEach(() => cleanup());

const persons: PersonHint[] = [
	{ id: 'w1', displayName: 'Walter Raddatz' },
	{ id: 'w2', displayName: 'Walter Müller' }
];

const multiProps = { persons, heading: 'Person auswählen', showCue: true };

function pressEscape() {
	(document.activeElement as HTMLElement).dispatchEvent(
		new KeyboardEvent('keydown', { key: 'Escape', bubbles: true })
	);
}

describe('DisambiguationPicker', () => {
	it('opens the picker and shows a select option per ambiguous person', async () => {
		render(DisambiguationPicker, { ...multiProps, onSelect: vi.fn() });
		await page.getByRole('button', { name: /Mehrere Personen gefunden/ }).click();
		await expect
			.element(page.getByRole('button', { name: 'Walter Raddatz auswählen' }))
			.toBeInTheDocument();
		await expect
			.element(page.getByRole('button', { name: 'Walter Müller auswählen' }))
			.toBeInTheDocument();
	});

	it('moves focus into the picker list on open', async () => {
		render(DisambiguationPicker, { ...multiProps, onSelect: vi.fn() });
		await page.getByRole('button', { name: /Mehrere Personen gefunden/ }).click();
		await expect
			.element(page.getByRole('button', { name: 'Walter Raddatz auswählen' }))
			.toHaveFocus();
	});

	it('returns focus to the trigger when closed with Escape', async () => {
		render(DisambiguationPicker, { ...multiProps, onSelect: vi.fn() });
		const trigger = page.getByRole('button', { name: /Mehrere Personen gefunden/ });
		await trigger.click();
		await expect
			.element(page.getByRole('button', { name: 'Walter Raddatz auswählen' }))
			.toHaveFocus();
		pressEscape();
		await expect.element(trigger).toHaveFocus();
	});

	it('does not call onSelect when dismissed without choosing', async () => {
		const onSelect = vi.fn();
		render(DisambiguationPicker, { ...multiProps, onSelect });
		await page.getByRole('button', { name: /Mehrere Personen gefunden/ }).click();
		await expect
			.element(page.getByRole('button', { name: 'Walter Raddatz auswählen' }))
			.toHaveFocus();
		pressEscape();
		expect(onSelect).not.toHaveBeenCalled();
	});

	it('calls onSelect with the chosen person', async () => {
		const onSelect = vi.fn();
		render(DisambiguationPicker, { ...multiProps, onSelect });
		await page.getByRole('button', { name: /Mehrere Personen gefunden/ }).click();
		await page.getByRole('button', { name: 'Walter Müller auswählen' }).click();
		expect(onSelect).toHaveBeenCalledWith(persons[1]);
	});

	it('renders the supplied heading as a visible panel heading', async () => {
		render(DisambiguationPicker, {
			persons: [{ id: 'c1', displayName: 'Clara Cramer' }],
			heading: 'Meintest du Clara Cramer?',
			showCue: false,
			onSelect: vi.fn()
		});
		await page.getByRole('button', { name: 'Meintest du Clara Cramer?' }).click();
		await expect.element(page.getByText('Meintest du Clara Cramer?')).toBeVisible();
	});

	it('suppresses the cue when showCue is false', async () => {
		render(DisambiguationPicker, {
			persons: [{ id: 'c1', displayName: 'Clara Cramer' }],
			heading: 'Meintest du Clara Cramer?',
			showCue: false,
			onSelect: vi.fn()
		});
		await expect.element(page.getByText('(auswählen…)')).not.toBeInTheDocument();
	});

	it('shows the cue when showCue is true', async () => {
		render(DisambiguationPicker, { ...multiProps, onSelect: vi.fn() });
		await expect.element(page.getByText('(auswählen…)')).toBeVisible();
	});

	it('announces the did-you-mean heading as the trigger accessible name for a single suggestion', async () => {
		render(DisambiguationPicker, {
			persons: [{ id: 'c1', displayName: 'Clara Cramer' }],
			heading: 'Meintest du Clara Cramer?',
			showCue: false,
			onSelect: vi.fn()
		});
		await expect
			.element(page.getByRole('button', { name: 'Meintest du Clara Cramer?' }))
			.toBeInTheDocument();
	});

	it('keeps the multiple-people trigger accessible name for two or more suggestions', async () => {
		render(DisambiguationPicker, { ...multiProps, onSelect: vi.fn() });
		await expect
			.element(page.getByRole('button', { name: /Mehrere Personen gefunden/ }))
			.toBeInTheDocument();
	});
});