import {
  candleGaps,
  candleWindows,
  confirmedCandleCoverage,
} from './candle-coverage';
const date = (value: string) => new Date(value);
describe('source-confirmed daily candle coverage', () => {
  it('retains closed empty coverage while yesterday incomplete and open empty ranges require rereading after midnight', () => {
    const range = { from: date('2026-09-20Z'), to: date('2026-09-26Z') };
    const now = date('2026-09-25T23:59:50Z');
    const coverage = confirmedCandleCoverage(
      range,
      [
        {
          time: '2026-09-24T00:00:00Z',
          close: '1.000000001',
          isComplete: false,
        },
      ],
      now,
    );
    expect(
      coverage.map((row) => [
        row.from.toISOString().slice(0, 10),
        row.to.toISOString().slice(0, 10),
        row.isComplete,
      ]),
    ).toEqual([
      ['2026-09-20', '2026-09-24', true],
      ['2026-09-24', '2026-09-25', false],
      ['2026-09-25', '2026-09-26', false],
    ]);
    expect(candleGaps(range, coverage, date('2026-09-25T23:59:59Z'))).toEqual(
      [],
    );
    expect(candleGaps(range, coverage, date('2026-09-26T00:00:01Z'))).toEqual([
      { from: date('2026-09-24Z'), to: range.to },
    ]);
    expect(
      candleGaps(
        range,
        confirmedCandleCoverage(range, [], date('2026-09-27Z')),
        date('2030-01-01Z'),
      ),
    ).toEqual([]);
  });
  it('expires the mutable empty current day at exactly one minute', () => {
    const range = { from: date('2026-09-25Z'), to: date('2026-09-26Z') };
    const covered = confirmedCandleCoverage(
      range,
      [],
      date('2026-09-25T08:00:00Z'),
    );
    expect(candleGaps(range, covered, date('2026-09-25T08:00:59Z'))).toEqual(
      [],
    );
    expect(candleGaps(range, covered, date('2026-09-25T08:01:00Z'))).toEqual([
      range,
    ]);
  });
  it('splits leap-year history into contiguous windows of at most 365 days', () => {
    const range = { from: date('2020-01-01Z'), to: date('2026-09-25Z') };
    const windows = candleWindows(range);
    expect(windows[0].from).toEqual(range.from);
    expect(windows.at(-1)?.to).toEqual(range.to);
    windows.forEach((window, index) => {
      expect(window.to.valueOf() - window.from.valueOf()).toBeLessThanOrEqual(
        365 * 86400000,
      );
      if (index) expect(window.from).toEqual(windows[index - 1].to);
    });
  });
});