import { confirmedOperationRanges, operationIntervals, planOperationRead } from './operations-sync-plan';

describe('confirmed operation range projection', () => {
  it('clips overlaps in source order without merging and respects account and instrument scope', () => {
    const day = (value: number) => new Date(Date.UTC(2026, 0, value));
    const target = { accountId: 'a', from: day(2), to: day(5) };
    const sources = [
      { ...target, from: day(3), to: day(6) },
      { ...target, from: day(1), to: day(4) },
      { ...target, instrumentUid: 'uid' },
      { ...target, accountId: 'other' },
      { ...target, from: day(5), to: day(6) },
      { ...target, from: day(1), to: day(2) },
    ];
    const before = structuredClone(sources);
    expect(confirmedOperationRanges([target], sources)).toEqual([
      { ...target, from: day(3) },
      { ...target, to: day(4) },
    ]);
    expect(confirmedOperationRanges([{ ...target, instrumentUid: 'uid' }], sources)).toEqual([
      { ...target, from: day(3) },
      { ...target, to: day(4) },
      target,
    ]);
    expect(sources).toEqual(before);
  });
});

describe('operations calendar windows', () => {
  it('merges overlaps before splitting leap February and keeps precise Moscow-derived boundaries', () => {
    const result = operationIntervals([
      {
        accountId: 'a',
        from: new Date('2024-02-01T00:00:00+03:00'),
        to: new Date('2024-03-01T00:00:00+03:00'),
      },
      {
        accountId: 'a',
        from: new Date('2024-02-10Z'),
        to: new Date('2024-04-01Z'),
      },
    ]);
    expect(
      result.map(({ from, to }) => [from.toISOString(), to.toISOString()]),
    ).toEqual([
      ['2024-01-31T21:00:00.000Z', '2024-02-01T00:00:00.000Z'],
      ['2024-02-01T00:00:00.000Z', '2024-03-01T00:00:00.000Z'],
      ['2024-03-01T00:00:00.000Z', '2024-04-01T00:00:00.000Z'],
    ]);
  });

  it('does not combine account or instrument predicates and rejects invalid ranges', () => {
    const range = {
      from: new Date('2026-12-15Z'),
      to: new Date('2027-01-15Z'),
    };
    const result = operationIntervals([
      { accountId: 'a', ...range },
      { accountId: 'b', ...range },
      { accountId: 'a', instrumentUid: 'uid', ...range },
    ]);
    expect(result).toHaveLength(6);
    expect(() =>
      operationIntervals([{ accountId: 'a', from: range.to, to: range.from }]),
    ).toThrow();
  });
});

describe('operation completeness and freshness', () => {
  const from = new Date('2026-09-01Z');
  const asOf = new Date('2026-09-25T12:00:00Z');
  const covered = { accountId: 'a', from, to: asOf, asOf, fetchedAt: asOf };

  it.each([1, 3599, 3600])(
    'preserves the observed complete end after %s seconds, separately from TTL',
    (seconds) => {
      const now = new Date(asOf.valueOf() + seconds * 1000);
      const plan = planOperationRead(
        [{ accountId: 'a', from, to: now }],
        [covered],
        now,
        { movingEnd: true },
      );
      expect(plan.intervals[0]).toMatchObject({
        availability: 'complete',
        asOf,
        to: asOf,
        stale: seconds >= 3600,
      });
      expect(plan.load).toEqual(
        [],
      );
    },
  );

  it('preserves a cursor observed end after the clock and calendar advance', () => {
    const cursorEnd = new Date(asOf.valueOf() + 1000);
    const plan = planOperationRead(
      [{ accountId: 'a', from, to: cursorEnd }],
      [covered],
      new Date('2026-10-01Z'),
      { movingEnd: true },
    );
    expect(plan.intervals[0]).toMatchObject({
      availability: 'complete',
      to: asOf,
      asOf,
    });
    expect(plan.load).toEqual([]);
  });
  it('does not hide earlier holes or reuse an instrument subset as whole-account completeness', () => {
    const now = new Date(asOf.valueOf() + 1000);
    const partial = { ...covered, from: new Date('2026-09-10Z') };
    const plan = planOperationRead(
      [{ accountId: 'a', from, to: now }],
      [partial],
      now,
      { movingEnd: true },
    );
    expect(plan.intervals[0]).toMatchObject({
      availability: 'partial',
      stale: false,
    });
    expect(plan.load).toEqual([{ accountId: 'a', from, to: partial.from }]);
    expect(
      planOperationRead(
        [{ accountId: 'a', from, to: now }],
        [{ ...covered, instrumentUid: 'uid' }],
        now,
      ).intervals[0].availability,
    ).toBe('missing');
  });

  it('loads a newly explicit tail and closes the previous month after rollover', () => {
    const now = new Date(asOf.valueOf() + 1000);
    expect(
      planOperationRead([{ accountId: 'a', from, to: now }], [covered], now)
        .load,
    ).toEqual([{ accountId: 'a', from: asOf, to: now }]);
    const monthEnd = new Date('2026-10-01Z');
    const rollover = new Date('2026-10-01T00:00:01Z');
    const plan = planOperationRead(
      [{ accountId: 'a', from, to: rollover }],
      [covered],
      rollover,
      { movingEnd: true },
    );
    expect(plan.load).toEqual([
      { accountId: 'a', from: asOf, to: monthEnd },
      { accountId: 'a', from: monthEnd, to: rollover },
    ]);
    expect(
      planOperationRead(
        [{ accountId: 'a', from, to: monthEnd }],
        [{ ...covered, to: monthEnd, asOf: monthEnd }],
        rollover,
      ).load,
    ).toEqual([]);
  });

  it('force refresh reloads only the shown target even when coverage is fresh', () => {
    const target = { accountId: 'a', from: new Date('2026-09-20Z'), to: asOf };
    expect(
      planOperationRead([target], [covered], asOf, { force: true }).load,
    ).toEqual([target]);
  });
});