import { test } from 'node:test';
import assert from 'node:assert/strict';
import { easterSunday, germanHolidays } from '../server/holidays.js';

test('Ostersonntag bekannter Jahre', () => {
  assert.equal(easterSunday(2024), '2024-03-31');
  assert.equal(easterSunday(2025), '2025-04-20');
  assert.equal(easterSunday(2026), '2026-04-05');
  assert.equal(easterSunday(2027), '2027-03-28');
});

test('bundesweite Feiertage 2026', () => {
  const dates = Object.fromEntries(germanHolidays(2026).map((h) => [h.name, h.date]));
  assert.equal(dates['Karfreitag'], '2026-04-03');
  assert.equal(dates['Ostermontag'], '2026-04-06');
  assert.equal(dates['Christi Himmelfahrt'], '2026-05-14');
  assert.equal(dates['Pfingstmontag'], '2026-05-25');
  assert.equal(dates['Tag der Deutschen Einheit'], '2026-10-03');
  assert.equal(Object.keys(dates).length, 9);
  assert.ok(!('Fronleichnam' in dates));
});

test('Landesfeiertage nur im passenden Bundesland', () => {
  const nw = germanHolidays(2026, 'NW').map((h) => h.name);
  assert.ok(nw.includes('Fronleichnam'));
  assert.ok(nw.includes('Allerheiligen'));
  assert.ok(!nw.includes('Reformationstag'));
  const sn = Object.fromEntries(germanHolidays(2026, 'SN').map((h) => [h.name, h.date]));
  assert.equal(sn['Buß- und Bettag'], '2026-11-18');
  assert.ok('Reformationstag' in sn);
});