'use strict';

/**
 * Which stats serve a calibrated number in the live pipeline.
 *
 * The rule this locks: a stat that cannot survive dropping a single settled date
 * was never calibrated — it was fitted to that date. hits WAS served calibrated
 * and is not any more, which is the honest consequence of measuring it.
 */

const snapshotService = require('../../src/services/snapshotService');

describe('the deployed set is LODO-gated', () => {
  it('serves the stats that passed LODO at the powered threshold', () => {
    expect(snapshotService.CALIBRATION_DEPLOYED).toContain('total_bases');
    // hits was withdrawn at 6ae11f1 under a hand-chosen threshold that admitted
    // 20-row dates as evidence, and is restored here because the powered
    // instrument finds no reversal. Through the gate, not around it.
    expect(snapshotService.CALIBRATION_DEPLOYED).toContain('hits');
  });

  it('does NOT serve rbi or runs — both fail on dates ABOVE the threshold', () => {
    // These are DATE-DRIVEN failures, not underpowered ones: rbi reverses on a
    // 99-row date and runs on 86- and 244-row dates. No threshold rescues them.
    for (const stat of ['rbi', 'runs']) {
      expect(snapshotService.CALIBRATION_DEPLOYED).not.toContain(stat);
    }
  });

  it('every deployed stat cleared the power-derived threshold, not a chosen one', () => {
    const { LODO_MIN_HELD_ROWS, LODO_THRESHOLD_BASIS } = require('../../src/services/model/calibrationRegistry');
    expect(LODO_MIN_HELD_ROWS).toBe(70);
    expect(LODO_THRESHOLD_BASIS.derived_blind).toBe(true);
    // The reversing dates that keep rbi/runs out are all at or above it, so
    // their exclusion cannot be an artefact of the threshold.
    for (const n of [99, 86, 244]) expect(n).toBeGreaterThanOrEqual(LODO_MIN_HELD_ROWS);
  });

  it('is frozen, so a stat cannot be added at runtime without a code change', () => {
    expect(Object.isFrozen(snapshotService.CALIBRATION_DEPLOYED)).toBe(true);
    expect(() => { snapshotService.CALIBRATION_DEPLOYED.push('hits'); }).toThrow();
  });
});