import {DAY, HOUR} from '@/units.js';
import {describe, it, expect} from 'vitest';
import {ZonedDateTime} from '@/';
import {TimeZone} from '@clarify/zone-data';
import importer from '@clarify/zone-data/importer';

describe('ZonedDateTime#add', () => {
  describe('addDay', () => {
    it('adds day', async () => {
      let zone = new TimeZone('Test/AddHours', [1679954400000, null], [-120, -60]);
      let date = new ZonedDateTime(1679954400000 - DAY, zone);
      expect(date.toJSON()).toEqual('2023-03-27T00:00:00.000+02:00[Test/AddHours]');
      expect(date.hour).toEqual(0);
      expect(date.day).toEqual(27);

      date = date.add({days: 1});
      expect(date.hour).toEqual(0);
      expect(date.day).toEqual(28);
      expect(date.toJSON()).toEqual('2023-03-28T00:00:00.000+01:00[Test/AddHours]');
    });

    it('adds day - 1', async () => {
      let zone = new TimeZone('Test/AddHours', [1679958000000, null], [-60, -120]);
      let date = new ZonedDateTime(1679958000000 - DAY, zone);
      expect(date.hour).toEqual(0);
      expect(date.day).toEqual(27);

      date = date.add({days: 1});
      expect(date.hour).toEqual(1);
      expect(date.day).toEqual(28);
    });

    it('adds month - 1', async () => {
      let zone = new TimeZone('Test/AddHours', [1679958000000, null], [-60, -120]);

      let date = new ZonedDateTime(Date.parse('2023-02-27T23:00:00.000Z'), zone);
      expect(date.hour).toEqual(0);
      expect(date.month).toEqual(2);
      expect(date.day).toEqual(28);

      date = date.add({months: 1});
      expect(date.month).toEqual(3);
      expect(date.hour).toEqual(1);
      expect(date.day).toEqual(28);
    });

    it('adds day - 1', async () => {
      let zone = new TimeZone('Test/AddHours', [1679972400000, null], [-60, -120]);

      let date = new ZonedDateTime(1679972400000 - HOUR * 4, zone);
      expect(date.toJSON()).toEqual('2023-03-28T00:00:00.000+01:00[Test/AddHours]');
      date = date.add({days: 1});
      expect(date.toJSON()).toEqual('2023-03-29T00:00:00.000+02:00[Test/AddHours]');
    });
  });

  describe('Europe/Oslo', () => {
    it('adds days', async () => {
      let zone = await importer['Europe/Oslo']();
      let date = new ZonedDateTime(Date.parse('1975-07-28T18:51:40.000Z'), zone);
      date = date.add({days: 180});
      expect(date.toJSON()).toEqual('1976-01-24T19:51:40.000+01:00[Europe/Paris]');
    });

    it('adds hours', async () => {
      let zone = new TimeZone('Test/AddHours', [1679983200000, null], [-180, -120]);

      let date = new ZonedDateTime(1679983200000 - 1, zone);

      date = date.with({
        minute: 0,
        second: 0,
        millisecond: 0,
      });
      expect(date.toJSON()).toEqual('2023-03-28T08:00:00.000+03:00[Test/AddHours]');
      date = date.add({hours: 1});
      expect(date.toJSON()).toEqual('2023-03-28T08:00:00.000+02:00[Test/AddHours]');
      date = date.add({hours: 1});
      expect(date.toJSON()).toEqual('2023-03-28T09:00:00.000+02:00[Test/AddHours]');
    });

    it('adds hours', async () => {
      let zone = new TimeZone('Test/AddHours', [1679983200000, null], [-60, -120]);

      let date = new ZonedDateTime(1679983200000 - 1, zone);

      date = date.with({
        minute: 0,
        second: 0,
        millisecond: 0,
      });
      expect(date.toJSON()).toEqual('2023-03-28T06:00:00.000+01:00[Test/AddHours]');
      date = date.add({hours: 1});
      expect(date.toJSON()).toEqual('2023-03-28T08:00:00.000+02:00[Test/AddHours]');
      date = date.add({hours: 1});
      expect(date.toJSON()).toEqual('2023-03-28T09:00:00.000+02:00[Test/AddHours]');
    });

    it('adds hours (+60 offset)', async () => {
      let zone = new TimeZone('Test/AddHours', [1679983200000, null], [180, 180 + 60]);

      let date = new ZonedDateTime(1679983200000 - 1, zone);

      date = date.with({
        minute: 0,
        second: 0,
        millisecond: 0,
      });

      expect(date.toJSON()).toEqual('2023-03-28T02:00:00.000-03:00[Test/AddHours]');
      date = date.add({hours: 1});
      expect(date.toJSON()).toEqual('2023-03-28T02:00:00.000-04:00[Test/AddHours]');
      date = date.add({hours: 1});
      expect(date.toJSON()).toEqual('2023-03-28T03:00:00.000-04:00[Test/AddHours]');
    });

    it('adds hours (15 min offset)', async () => {
      let zone = new TimeZone('Test/AddHours', [1679983200000, null], [120, 120 + 15]);

      let date = new ZonedDateTime(1679983200000 - 1, zone);

      date = date.with({
        minute: 0,
        second: 0,
        millisecond: 0,
      });

      expect(date.toJSON()).toEqual('2023-03-28T03:00:00.000-02:00[Test/AddHours]');
      date = date.add({hours: 1});
      expect(date.toJSON()).toEqual('2023-03-28T03:45:00.000-02:15[Test/AddHours]');
      date = date.add({hours: 1});
      expect(date.toJSON()).toEqual('2023-03-28T04:45:00.000-02:15[Test/AddHours]');
    });

    it('adds hours (shifted)', async () => {
      let zone = new TimeZone('Test/AddHours', [1679983200000, null], [120, 180]);

      let date = new ZonedDateTime(1679983200000 - 1, zone);

      date = date.with({
        minute: 0,
        second: 0,
        millisecond: 0,
      });

      expect(date.toJSON()).toEqual('2023-03-28T03:00:00.000-02:00[Test/AddHours]');

      date = date.add({hours: 1});
      expect(date.toJSON()).toEqual('2023-03-28T03:00:00.000-03:00[Test/AddHours]');

      date = date.add({hours: 1});
      expect(date.toJSON()).toEqual('2023-03-28T04:00:00.000-03:00[Test/AddHours]');
    });

    it('adds hours (shifted, 30 min)', async () => {
      let zone = new TimeZone('Test/AddHours', [1679983200000, null], [120, 150]);

      let date = new ZonedDateTime(1679983200000 - 1, zone);

      date = date.with({
        minute: 0,
        second: 0,
        millisecond: 0,
      });

      expect(date.toJSON()).toEqual('2023-03-28T03:00:00.000-02:00[Test/AddHours]');

      date = date.add({hours: 1});
      expect(date.toJSON()).toEqual('2023-03-28T03:30:00.000-02:30[Test/AddHours]');

      date = date.add({hours: 1});
      expect(date.toJSON()).toEqual('2023-03-28T04:30:00.000-02:30[Test/AddHours]');
    });
  });
});