import { context } from '../../../../../../tests/utilities';
import { RuleOption } from '../rule-options';
import { IByDayOfWeekRuleOptions } from './06-by-day-of-week.pipe';
import {
  getPrevWeekdaysOfMonth,
  getPrevWeekdaysOfYear,
  RevByDayOfWeekPipe,
} from './rev-06-by-day-of-week.pipe';
import { buildPipeFn, dateTime } from './test-utilities';

const buildPipe = buildPipeFn<typeof RevByDayOfWeekPipe, IByDayOfWeekRuleOptions>(
  RevByDayOfWeekPipe,
);

describe('RevByDayOfWeekPipe', () => {
  let byDayOfWeek: RuleOption.ByDayOfWeek[];
  let byMonthOfYear: RuleOption.ByMonthOfYear[] | undefined;

  afterEach(() => {
    byDayOfWeek = undefined as any;
    byMonthOfYear = undefined;
  });

  context('YEARLY', (frequency: 'YEARLY') => {
    context(dateTime(2019, 1, 1, 2, 3, 4, 5), date => {
      it('TU', () => {
        byDayOfWeek = ['TU'];

        const prevWeekdays = getPrevWeekdaysOfYear(date, byDayOfWeek);

        expect(prevWeekdays).toEqual([date]);

        const pipe = buildPipe(date, { byDayOfWeek, byMonthOfYear, frequency });

        expect(pipe.run({ date })).toEqual({ date });
      });

      it('FR,TH,20MO', () => {
        byDayOfWeek = ['FR', 'TH', ['MO', 20]];

        let prevWeekdays = getPrevWeekdaysOfYear(date, byDayOfWeek);

        expect(prevWeekdays).toEqual([]);

        prevWeekdays = getPrevWeekdaysOfYear(
          date.subtract(1, 'year').endGranularity('year'),
          byDayOfWeek,
        );

        expect(prevWeekdays).toEqual([
          dateTime(2018, 12, 28).endGranularity('day'),
          dateTime(2018, 12, 27).endGranularity('day'),
          dateTime(2018, 5, 14).endGranularity('day'),
        ]);

        const pipe = buildPipe(date, { byDayOfWeek, byMonthOfYear, frequency });

        expect(pipe.run({ date })).toEqual({
          date,
          invalidDate: true,
          skipToDate: dateTime(2018, 12, 28).endGranularity('day'),
        });
      });

      it('FR,TH,53MO', () => {
        byDayOfWeek = ['FR', 'TH', ['MO', 53]];

        let prevWeekdays = getPrevWeekdaysOfYear(date, byDayOfWeek);

        expect(prevWeekdays).toEqual([]);

        prevWeekdays = getPrevWeekdaysOfYear(
          date.subtract(1, 'year').endGranularity('year'),
          byDayOfWeek,
        );

        expect(prevWeekdays).toEqual([
          dateTime(2018, 12, 31).endGranularity('day'),
          dateTime(2018, 12, 28).endGranularity('day'),
          dateTime(2018, 12, 27).endGranularity('day'),
        ]);

        const pipe = buildPipe(date, { byDayOfWeek, byMonthOfYear, frequency });

        expect(pipe.run({ date })).toEqual({
          date,
          invalidDate: true,
          skipToDate: dateTime(2018, 12, 31).endGranularity('day'),
        });
      });

      it('FR,TH,3MO and 1,5', () => {
        byDayOfWeek = ['FR', 'TH', ['MO', 3]];
        byMonthOfYear = [1, 5];

        let prevWeekdays = getPrevWeekdaysOfMonth(date, byDayOfWeek);

        expect(prevWeekdays).toEqual([]);

        prevWeekdays = getPrevWeekdaysOfMonth(
          date.granularity('year').subtract(1, 'millisecond'),
          byDayOfWeek,
        );

        expect(prevWeekdays).toEqual([
          dateTime(2018, 12, 28).endGranularity('day'),
          dateTime(2018, 12, 27).endGranularity('day'),
          dateTime(2018, 12, 17).endGranularity('day'),
        ]);

        const pipe = buildPipe(date, { byDayOfWeek, byMonthOfYear, frequency });

        expect(pipe.run({ date })).toEqual({
          date,
          invalidDate: true,
          skipToDate: dateTime(2018, 12, 28).endGranularity('day'),
        });
      });
    });

    context(dateTime(2019, 1, 16, 2, 3, 4, 5), date => {
      it('TU', () => {
        byDayOfWeek = ['TU'];

        const prevWeekdays = getPrevWeekdaysOfYear(date, byDayOfWeek);

        expect(prevWeekdays).toEqual([dateTime(2019, 1, 15, 2, 3, 4, 5)]);

        const pipe = buildPipe(date, { byDayOfWeek, byMonthOfYear, frequency });

        expect(pipe.run({ date })).toEqual({
          date,
          invalidDate: true,
          skipToDate: dateTime(2019, 1, 15).endGranularity('day'),
        });
      });

      it('FR,TH,20MO', () => {
        byDayOfWeek = ['FR', 'TH', ['MO', 20]];

        const prevWeekdays = getPrevWeekdaysOfYear(date, byDayOfWeek);

        expect(prevWeekdays).toEqual([
          dateTime(2019, 1, 11, 2, 3, 4, 5),
          dateTime(2019, 1, 10, 2, 3, 4, 5),
        ]);

        const pipe = buildPipe(date, { byDayOfWeek, byMonthOfYear, frequency });

        expect(pipe.run({ date })).toEqual({
          date,
          invalidDate: true,
          skipToDate: dateTime(2019, 1, 11).endGranularity('day'),
        });
      });
    });

    context(dateTime(2019, 3, 16, 2, 3, 4, 5), date => {
      it('3MO and 1,5', () => {
        byDayOfWeek = [['MO', 3]];
        byMonthOfYear = [1, 5];

        let prevWeekdays = getPrevWeekdaysOfMonth(date, byDayOfWeek);

        expect(prevWeekdays).toEqual([]);

        prevWeekdays = getPrevWeekdaysOfMonth(
          date.granularity('month').subtract(1, 'millisecond'),
          byDayOfWeek,
        );

        expect(prevWeekdays).toEqual([dateTime(2019, 2, 18).endGranularity('day')]);

        const pipe = buildPipe(date, { byDayOfWeek, byMonthOfYear, frequency });

        expect(pipe.run({ date })).toEqual({
          date,
          invalidDate: true,
          skipToDate: dateTime(2019, 2, 18).endGranularity('day'),
        });
      });

      it('3MO and 2', () => {
        byDayOfWeek = [['MO', 3]];
        byMonthOfYear = [2];

        let prevWeekdays = getPrevWeekdaysOfMonth(date, byDayOfWeek);

        expect(prevWeekdays).toEqual([]);

        prevWeekdays = getPrevWeekdaysOfMonth(
          date.granularity('month').subtract(1, 'millisecond'),
          byDayOfWeek,
        );

        expect(prevWeekdays).toEqual([dateTime(2019, 2, 18).endGranularity('day')]);

        const pipe = buildPipe(date, { byDayOfWeek, byMonthOfYear, frequency });

        expect(pipe.run({ date })).toEqual({
          date,
          invalidDate: true,
          skipToDate: dateTime(2019, 2, 18).endGranularity('day'),
        });
      });
    });
  });

  context('MONTHLY', (frequency: 'MONTHLY') => {
    context(dateTime(2019, 1, 1, 2, 3, 4, 5), date => {
      it('TU', () => {
        byDayOfWeek = ['TU'];

        const prevWeekdays = getPrevWeekdaysOfMonth(date, byDayOfWeek);

        expect(prevWeekdays).toEqual([date]);

        const pipe = buildPipe(date, { byDayOfWeek, byMonthOfYear, frequency });

        expect(pipe.run({ date })).toEqual({ date });
      });
    });

    context(dateTime(2019, 1, 16, 2, 3, 4, 5), date => {
      it('FR,TH,3MO', () => {
        byDayOfWeek = ['FR', 'TH', ['MO', 3]];

        const prevWeekdays = getPrevWeekdaysOfMonth(date, byDayOfWeek);

        expect(prevWeekdays).toEqual([
          dateTime(2019, 1, 11, 2, 3, 4, 5),
          dateTime(2019, 1, 10, 2, 3, 4, 5),
        ]);

        const pipe = buildPipe(date, { byDayOfWeek, byMonthOfYear, frequency });

        expect(pipe.run({ date })).toEqual({
          date,
          invalidDate: true,
          skipToDate: dateTime(2019, 1, 11).endGranularity('day'),
        });
      });
    });

    context(dateTime(2019, 3, 16, 2, 3, 4, 5), date => {
      it('3MO and 2', () => {
        byDayOfWeek = [['MO', 3]];
        byMonthOfYear = [2];

        let prevWeekdays = getPrevWeekdaysOfMonth(date, byDayOfWeek);

        expect(prevWeekdays).toEqual([]);

        prevWeekdays = getPrevWeekdaysOfMonth(
          date.granularity('month').subtract(1, 'millisecond'),
          byDayOfWeek,
        );

        expect(prevWeekdays).toEqual([dateTime(2019, 2, 18).endGranularity('day')]);

        const pipe = buildPipe(date, { byDayOfWeek, byMonthOfYear, frequency });

        expect(pipe.run({ date })).toEqual({
          date,
          invalidDate: true,
          skipToDate: dateTime(2019, 2, 18).endGranularity('day'),
        });
      });
    });

    context(dateTime(2019, 3, 30, 2, 3, 4, 5), date => {
      it('3MO and 1,5', () => {
        byDayOfWeek = ['MO'];
        byMonthOfYear = [1, 5];

        const pipe = buildPipe(date, { byDayOfWeek, byMonthOfYear, frequency });

        expect(pipe.run({ date })).toEqual({
          date,
          invalidDate: true,
          skipToDate: dateTime(2019, 3, 25).endGranularity('day'),
        });
      });
    });
  });

  context('DAILY', (frequency: 'DAILY') => {
    context(dateTime(2019, 1, 1, 2, 3, 4, 5), date => {
      it('TU', () => {
        byDayOfWeek = ['TU'];

        const pipe = buildPipe(date, { byDayOfWeek, byMonthOfYear, frequency });

        expect(pipe.run({ date })).toEqual({ date });
      });

      it('FR,TH', () => {
        byDayOfWeek = ['FR', 'TH'];
        byMonthOfYear = [1, 5];

        const pipe = buildPipe(date, { byDayOfWeek, byMonthOfYear, frequency });

        expect(pipe.run({ date })).toEqual({
          date,
          invalidDate: true,
          skipToDate: dateTime(2018, 12, 28).endGranularity('day'),
        });
      });
    });
  });
});