import { describe, it, expect, afterEach } from 'vitest';
import { cleanup, render } from 'vitest-browser-svelte';
import { page } from 'vitest/browser';

import ContributorStack from './ContributorStack.svelte';
import type { components } from '$lib/generated/api';

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

afterEach(() => cleanup());

const makeActor = (overrides: Partial<ActivityActorDTO> = {}): ActivityActorDTO => ({
	initials: 'MR',
	color: '#7a4f9a',
	name: 'Max Raddatz',
	...overrides
});

describe('ContributorStack', () => {
	it('contributor avatar is announced by screen readers with actor name', async () => {
		const actor = makeActor({ name: 'Anna Meier', initials: 'AM' });
		render(ContributorStack, { contributors: [actor], hasMore: false });
		await expect.element(page.getByRole('img', { name: 'Anna Meier' })).toBeInTheDocument();
	});

	it('falls back to initials as accessible name when actor name is null', async () => {
		const actor = makeActor({ name: undefined, initials: 'AM' });
		render(ContributorStack, { contributors: [actor], hasMore: false });
		await expect.element(page.getByRole('img', { name: 'AM' })).toBeInTheDocument();
	});

	it('renders two avatars without crashing when actors have identical initials', async () => {
		const actors = [
			makeActor({ name: undefined, initials: 'AM', color: '#aa0000' }),
			makeActor({ name: undefined, initials: 'AM', color: '#0000bb' })
		];
		render(ContributorStack, { contributors: actors, hasMore: false });
		await expect.element(page.getByText('AM').first()).toBeInTheDocument();
	});

	it('renders overflow indicator when hasMore is true', async () => {
		render(ContributorStack, { contributors: [makeActor()], hasMore: true });
		await expect.element(page.getByText('…')).toBeInTheDocument();
	});

	it('renders empty placeholder when no contributors', async () => {
		render(ContributorStack, { contributors: [], hasMore: false });
		await expect.element(page.getByTitle('Noch niemand angefangen')).toBeInTheDocument();
	});
});