import {describe, it, assert} from 'vitest';
import {Duration, PlainTime} from '@/';
import {PlainDateTime} from '@/plain-date-time.js';

let values = [new Duration(0, 0, 0, 1), new Duration(0, 0, 1), new Duration(0, 1), new Duration(1)];

describe('PlainDateTime#add', () => {
  it('hour overflow', () => {
    let earlier = new PlainDateTime(2020, 5, 31, 23, 12, 38, 271);
    let result = earlier.add({hours: 2});
    let expected = new PlainDateTime(2020, 6, 1, 1, 12, 38, 271);
    assert.ok(result.equals(expected), 'equals');
  });

  it('adds duration', () => {
    let jan31 = new PlainDateTime(2020, 1, 31, 15, 0);
    let result = jan31.add(Duration.from('P1MT1S'));
    let expected = new PlainDateTime(2020, 2, 29, 15, 0, 1, 0);
    assert.ok(result.equals(expected), 'equals');
  });

  it('regression: mod', () => {
    let jan31 = new PlainDateTime(2020, 1, 31);
    let result = jan31.add({minutes: -45});
    let expected = new PlainDateTime(2020, 1, 30, 23, 15, 0, 0);
    assert.ok(result.equals(expected), 'equals');
  });

  it('regression: mods', () => {
    let jan31 = new PlainDateTime(2020, 2, 1);
    let result = jan31.add({minutes: -45});
    let expected = new PlainDateTime(2020, 1, 31, 23, 15, 0, 0);
    assert.ok(result.equals(expected), 'equals');
  });

  describe('higher units', () => {
    const plainTime = new PlainTime(15, 23, 30, 123);

    it.each(values)('adds day', async duration => {
      let value = plainTime.add(duration);
      assert.deepEqual([value.hour, value.minute, value.second, value.millisecond], [15, 23, 30, 123]);
    });
  });
});