import {describe, it, expect} from 'vitest';
import {ISO8601Result, Zulu} from '@/parse.js';

describe('Parse', () => {
  describe('date segment', () => {
    it('adds day', () => {
      let result = ISO8601Result.parseDateTime('2024-05-04');
      expect(result!.date).toEqual({year: 2024, month: 5, day: 4});

      let withoutSeparator = ISO8601Result.parseDateTime('20240504');
      expect(withoutSeparator!.date).toEqual({year: 2024, month: 5, day: 4});
    });

    it('rejects mixing date separators', () => {
      expect(ISO8601Result.parseDateTime('2024-0504')).toEqual(null);
      expect(ISO8601Result.parseDateTime('202405-04')).toEqual(null);
    });
  });

  describe('time segment', () => {
    it('just segment', () => {
      let simple = ISO8601Result.parseDateTime('T12:13:14');
      expect(simple!.time).toEqual({hour: 12, minute: 13, second: 14, millisecond: 0});

      let withoutSeparator = ISO8601Result.parseDateTime('T121314');
      expect(withoutSeparator!.time).toEqual({hour: 12, minute: 13, second: 14, millisecond: 0});

      expect(ISO8601Result.parseDateTime('12:13:14')).toEqual(null);
    });

    it('time segment', () => {
      let simple = ISO8601Result.parseDateTime('2024-05-04T12:12');
      expect(simple!.time).toEqual({hour: 12, minute: 12, second: 0, millisecond: 0});

      let hourOnly = ISO8601Result.parseDateTime('2024-05-04T12');
      expect(hourOnly!.time).toEqual({hour: 12, minute: 0, second: 0, millisecond: 0});

      let result = ISO8601Result.parseDateTime('2024-05-04T12:13:14');
      expect(result!.time).toEqual({hour: 12, minute: 13, second: 14, millisecond: 0});

      let msResult = ISO8601Result.parseDateTime('2024-05-04T12:13:14.123');
      expect(msResult!.time).toEqual({hour: 12, minute: 13, second: 14, millisecond: 123});
    });

    it('rejects mixing time separators', () => {
      expect(ISO8601Result.parseDateTime('T12:1314')).toEqual(null);
      expect(ISO8601Result.parseDateTime('T1213:14')).toEqual(null);
      expect(ISO8601Result.parseDateTime('T12:1314.123')).toEqual(null);
    });

    it('requires leading T', () => {
      expect(ISO8601Result.parseDateTime('12:13:14')).toEqual(null);
    });
  });

  describe('offset', () => {
    it('offset', () => {
      let simple = ISO8601Result.parseDateTime('2024-05-04T12:13+09');
      expect(simple!.offset).toEqual(32400000);

      let withMinutes = ISO8601Result.parseDateTime('2024-05-04T12:13+08:15');
      expect(withMinutes!.offset).toEqual(29700000);

      let minusMinutes = ISO8601Result.parseDateTime('2024-05-04T12:13-08:15');
      expect(minusMinutes!.offset).toEqual(-29700000);

      let simpleTime = ISO8601Result.parseDateTime('2024-05-04T12+09');
      expect(simpleTime!.offset).toEqual(32400000);
    });

    it('rejects offset without time', () => {
      expect(ISO8601Result.parseDateTime('2024-05-04Z')).toEqual(null);
      expect(ISO8601Result.parseDateTime('2024-05-04+04:00')).toEqual(null);
      expect(ISO8601Result.parseDateTime('2024-05-04T+04:00')).toEqual(null);
    });

    it('time zone designator', () => {
      let simple = ISO8601Result.parseDateTime('2024-05-04T12:13Z');
      expect(simple!.offset).toEqual(Zulu);

      let simpleTime = ISO8601Result.parseDateTime('2024-05-04T12Z');
      expect(simpleTime!.offset).toEqual(Zulu);
    });

    it('time zone', () => {
      let simple = ISO8601Result.parseDateTime('2024-05-04T12:13[Europe/Oslo]');
      expect(simple!.timeZone).toEqual('Europe/Oslo');
    });

    it('complex', () => {
      let simple = ISO8601Result.parseDateTime('2024-05-04T12:13[Europe/Oslo]');
      expect(simple!.timeZone).toEqual('Europe/Oslo');
    });
  });
});