// tests/kb-eval/test-apply-score-cache.test.mjs
// Spor D STEG 1 (S42): apply-skill-op.mjs refreshes the WHOLE-CORPUS score-cache
// after a successful mutation, so the SessionStart surfacing (STEG C) reflects the
// new disk immediately instead of going stale until the next manual
// `score-skill.mjs --write`.
//
// refreshScoreCache(report, {cachePath, generatedAt}) is the pure-scoring/impure-write
// seam: scoreReport + buildScoreCache (pure) then a single writeFileSync. The cache is
// WHOLE-CORPUS (independent of WHICH skill changed) because retire drops a skill and
// create/merge/sanitize shift sibling K10 — every applied mutation must regenerate it.

import { test } from 'node:test';
import assert from 'node:assert/strict';
import { readFileSync, rmSync } from 'node:fs';
import { tmpdir } from 'node:os';
import { join } from 'node:path';
import { refreshScoreCache, SCORE_CACHE_FILE } from '../../scripts/kb-eval/apply-skill-op.mjs';
import { scoreReport, buildScoreCache } from '../../scripts/kb-eval/lib/skill-score.mjs';

// A synthetic skill whose deterministic + judge criteria all pass; K10 is
// parametrizable so one helper drives both the OK and the below-target cases.
function skill(name, { k10Pass = true, k10Combined = 1, worst = 'other' } = {}) {
  return {
    name,
    deterministic: {
      K2_descriptionFormat: { pass: true },
      K3_bodyLength: { bodyLines: 100, pass: true },
      K5_progressiveDisclosure: { namedRatio: 0.5, pass: true },
      K6_routingTable: { pass: true },
      refCountConsistency: { consistent: true },
      K10_siblingScopeOverlap: { maxCombined: k10Combined, pass: k10Pass, threshold: 7, worstSibling: worst },
      N1_nameValidity: { pass: true },
      N2_descriptionLength: { pass: true },
      N3_refNestingDepth: { pass: true },
      N4_refToc: { ratio: 1, pass: true, withToc: 1, largeFiles: 1 },
      N5_forwardSlashPaths: { pass: true },
    },
    judge: {
      K1_triggerPrecision: { precision: 1, pass: true },
      K4_noDuplication: { score: 5, pass: true },
      K9_noTimeSensitive: { pass: true, findings: [] },
      K7_imperativeStyle: { ratio: 1, pass: true },
    },
  };
}

test('SCORE_CACHE_FILE points at the surfacing cache (scripts/kb-eval/data/skill-score-report.json)', () => {
  assert.ok(
    SCORE_CACHE_FILE.endsWith(join('scripts', 'kb-eval', 'data', 'skill-score-report.json')),
    `cache must be the same file STEG C surfacing reads; got: ${SCORE_CACHE_FILE}`,
  );
});

test('refreshScoreCache — persists exactly buildScoreCache(scoreReport(report)) and returns it', () => {
  const out = join(tmpdir(), `apply-score-cache-${process.pid}.json`);
  try {
    const report = { skills: [skill('alpha'), skill('beta', { k10Pass: false, k10Combined: 9, worst: 'alpha' })] };
    const returned = refreshScoreCache(report, { cachePath: out, generatedAt: '2026-06-23' });

    const onDisk = JSON.parse(readFileSync(out, 'utf8'));
    const expected = buildScoreCache(scoreReport(report, { target: 90 }), { generatedAt: '2026-06-23' });
    assert.deepEqual(onDisk, expected, 'persisted cache must equal buildScoreCache(scoreReport(report))');
    assert.deepEqual(returned, expected, 'return value mirrors what was written');

    // whole-corpus + compact + below[] as names
    assert.equal(onDisk.scored.length, 2);
    assert.ok(!('criteria' in onDisk.scored[0]), 'cache stays compact (no verbose criteria[])');
    assert.deepEqual(onDisk.below, ['beta'], 'the K10-failing skill surfaces as below-target');
    assert.equal(onDisk.generatedAt, '2026-06-23');
  } finally {
    rmSync(out, { force: true });
  }
});

test('refreshScoreCache — OVERWRITES (does not merge): a retire shrinks the cache', () => {
  const out = join(tmpdir(), `apply-score-cache-retire-${process.pid}.json`);
  try {
    // Corpus BEFORE: 3 skills.
    refreshScoreCache({ skills: [skill('alpha'), skill('beta'), skill('gamma')] }, { cachePath: out, generatedAt: '2026-06-23' });
    assert.equal(JSON.parse(readFileSync(out, 'utf8')).scored.length, 3);

    // A retire drops 'gamma' -> refresh with the smaller corpus. The cache is
    // overwritten whole-corpus, so the retired skill must not linger and re-surface.
    refreshScoreCache({ skills: [skill('alpha'), skill('beta')] }, { cachePath: out, generatedAt: '2026-06-23' });
    const after = JSON.parse(readFileSync(out, 'utf8'));
    assert.equal(after.scored.length, 2, 'cache overwritten, not merged');
    assert.ok(!after.scored.some((s) => s.name === 'gamma'), 'retired skill dropped from the surfacing cache');
  } finally {
    rmSync(out, { force: true });
  }
});

test('refreshScoreCache — generatedAt defaults to an ISO date (today) when not injected', () => {
  const out = join(tmpdir(), `apply-score-cache-date-${process.pid}.json`);
  try {
    refreshScoreCache({ skills: [skill('alpha')] }, { cachePath: out });
    const onDisk = JSON.parse(readFileSync(out, 'utf8'));
    assert.match(onDisk.generatedAt, /^\d{4}-\d{2}-\d{2}$/, 'impure layer stamps today as YYYY-MM-DD');
  } finally {
    rmSync(out, { force: true });
  }
});