import {describe, it, expect, beforeAll} from 'vitest';
import {ZonedDateTime} from '@/';
import importer from '@clarify/zone-data/importer';
import {TimeZone} from '@clarify/zone-data';

describe('ZonedDateTime', () => {
  describe('.hoursInDay', () => {
    let oslo!: TimeZone;
    let lordHowe!: TimeZone;
    let saoPaulo!: TimeZone;

    beforeAll(async () => {
      oslo = await importer['Europe/Oslo']();
      lordHowe = await importer['Australia/Lord_Howe']();
      saoPaulo = await importer['America/Sao_Paulo']();
    });

    describe('Europe/Oslo', () => {
      it('Europe/Oslo', async () => {
        let date = new ZonedDateTime(Date.parse('2024-03-08T15:03:57.265Z'), oslo);
        expect(date.hoursInDay).toEqual(24);
      });

      it('DST end', async () => {
        let one = new ZonedDateTime(Date.UTC(2024, 9, 26, 22, 0, 0), oslo);
        let two = new ZonedDateTime(Date.UTC(2024, 9, 27, 22, 0, 0), oslo);
        expect(one.hoursInDay).toEqual(25);
        expect(two.hoursInDay).toEqual(25);
      });

      it('DST start', async () => {
        let one = new ZonedDateTime(Date.UTC(2024, 2, 30, 23, 0, 0), oslo);
        let two = new ZonedDateTime(Date.UTC(2024, 2, 31, 21, 0, 0), oslo);
        expect(one.hoursInDay).toEqual(23);
        expect(two.hoursInDay).toEqual(23);
      });
    });

    describe('America/Sao_Paulo', () => {
      it('DST end', async () => {
        let date = new ZonedDateTime(Date.UTC(2018, 10, 4, 10, 0, 0), saoPaulo);
        expect(date.hoursInDay).toEqual(23);
      });

      it('DST start', async () => {
        let date = new ZonedDateTime(Date.UTC(2018, 1, 17, 10, 0, 0), saoPaulo);
        expect(date.hoursInDay, 'starts date at 01:00').toEqual(25);
      });
    });

    describe('Australia/Lord_Howe', () => {
      it('regular', async () => {
        let date = new ZonedDateTime(Date.UTC(2023, 5, 30, 15, 28, 4, 345), lordHowe);
        expect(date.hoursInDay).toEqual(24);
      });

      it('DST start', async () => {
        let date = new ZonedDateTime(Date.UTC(2023, 3, 1, 14, 28, 4, 345), lordHowe);
        expect(date.hoursInDay).toEqual(24.5);
      });

      it('DST end', async () => {
        let date = new ZonedDateTime(Date.UTC(2023, 8, 30, 15, 28, 4, 345), lordHowe);
        expect(date.hoursInDay).toEqual(23.5);
      });
    });
  });
});