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

vi.mock('$app/forms', () => ({ enhance: () => () => {} }));
vi.mock('$lib/person/PersonTypeahead.svelte', () => ({ default: () => null }));

afterEach(cleanup);

describe('AddRelationshipForm', () => {
	it('shows add-relationship button initially and no form', async () => {
		render(AddRelationshipForm, { personId: 'person-1' });
		await expect.element(page.getByRole('button')).toBeInTheDocument();
		await expect.element(page.getByRole('combobox')).not.toBeInTheDocument();
	});

	it('shows relationType select when add button is clicked', async () => {
		render(AddRelationshipForm, { personId: 'person-1' });
		document.querySelector<HTMLButtonElement>('button')!.click();
		await expect.element(page.getByRole('combobox')).toBeInTheDocument();
	});

	it('hides form and shows button when cancel is clicked', async () => {
		render(AddRelationshipForm, { personId: 'person-1' });
		document.querySelector<HTMLButtonElement>('button')!.click();
		await expect.element(page.getByRole('combobox')).toBeInTheDocument();
		const cancelBtn = [...document.querySelectorAll<HTMLButtonElement>('button')].find(
			(b) => b.type === 'button' && /abbrechen/i.test(b.textContent ?? '')
		);
		cancelBtn!.click();
		await expect.element(page.getByRole('combobox')).not.toBeInTheDocument();
	});

	it('submit is disabled when no person is selected', async () => {
		render(AddRelationshipForm, { personId: 'person-1' });
		document.querySelector<HTMLButtonElement>('button')!.click();
		await expect.element(page.getByRole('button', { name: /^Hinzufügen$/i })).toBeDisabled();
	});

	it('form has no server action when onSubmit prop is provided', async () => {
		const onSubmit = vi.fn().mockResolvedValue(undefined);
		render(AddRelationshipForm, { personId: 'person-1', onSubmit });
		document.querySelector<HTMLButtonElement>('button')!.click();
		await expect.element(page.getByRole('combobox')).toBeInTheDocument();
		const form = document.querySelector('form');
		expect(form?.hasAttribute('action')).toBe(false);
	});

	it('shows year-range error when toYear is before fromYear', async () => {
		render(AddRelationshipForm, { personId: 'person-1' });
		document.querySelector<HTMLButtonElement>('button')!.click();
		await expect.element(page.getByRole('combobox')).toBeInTheDocument();

		const fromInput = document.querySelector<HTMLInputElement>('input[name="fromYear"]')!;
		fromInput.value = '1935';
		fromInput.dispatchEvent(new InputEvent('input', { bubbles: true }));

		const toInput = document.querySelector<HTMLInputElement>('input[name="toYear"]')!;
		toInput.value = '1920';
		toInput.dispatchEvent(new InputEvent('input', { bubbles: true }));

		await expect.element(page.getByRole('alert')).toBeVisible();
	});
});