// tests/kb-update/test-full-pass-worklist.test.mjs
// Spor 3 Port 3 (kadens-judge) — PERIODIC full-pass WORKLIST (P3d).
//
// The incremental pass (P3a) only re-judges files whose source sitemap_lastmod
// moved past **Verified:** — it catches lastmod-VISIBLE drift. The full-pass
// catches the class staleness misses (base-rate showed staleness-recall 0/40):
// MS can change a page without bumping its sitemap lastmod. So the full-pass is
// deliberately LASTMOD-INDEPENDENT — it gates on the Port 1 frontmatter contract
// (type:reference + a Source URL to anchor against) and on cadence age of the
// **Verified:** stamp, NOT on lastmod. buildFileSourceMap (which skips sources
// without a lastmod) is reused only to ANNOTATE entries, never to gate them.
//
// classifyFullPassDue is PURE (mirrors classifyVerifiedStaleness): no disk, today
// + cadence injected. The operator-chosen design is a WORKLIST (not an inline
// judge): this produces the ranked list of files due for re-judge; the operator
// kicks off the actual judging separately (§5 "ikke auto-lansert", §4c "aldri
// auto-fiks", and the honest ~2700-fetch/multi-session cost forecloses inline).

import { test } from 'node:test';
import assert from 'node:assert/strict';
import {
  classifyFullPassDue,
  buildFullPassReport,
} from '../../scripts/kb-update/lib/full-pass-worklist.mjs';
import { normalizeStaleVerified } from '../../scripts/kb-update/lib/transform.mjs';
import {
  parseTypeHeader,
  parseSourceHeader,
  parseVerifiedHeader,
} from '../../scripts/kb-update/lib/kb-headers.mjs';

const TODAY = '2026-06-29';
const MAX_AGE = 90; // threshold = 2026-03-31 (verified strictly before → cadence-due)

const f = (over) => ({
  path: 'skills/x/references/a.md',
  type: 'reference',
  source: 'https://learn.microsoft.com/x',
  verified: '2026-06-01',
  newestSourceLastmod: null,
  ...over,
});

const opts = { today: TODAY, maxAgeDays: MAX_AGE };

// --- classifyFullPassDue: core scope + cadence classification ---

test('reference + source + never verified → due, reason never-verified', () => {
  const out = classifyFullPassDue([f({ verified: null })], opts);
  assert.equal(out.worklist.length, 1);
  assert.equal(out.worklist[0].reason, 'never-verified');
  assert.equal(out.worklist[0].ageDays, null);
  assert.equal(out.counts.neverVerified, 1);
  assert.equal(out.counts.due, 1);
});

test('reference + source + verified OLDER than cadence window → due, reason cadence-due', () => {
  const out = classifyFullPassDue([f({ verified: '2026-01-01' })], opts);
  assert.equal(out.worklist.length, 1);
  assert.equal(out.worklist[0].reason, 'cadence-due');
  assert.equal(out.worklist[0].ageDays, 179); // 2026-01-01 → 2026-06-29
  assert.equal(out.counts.cadenceDue, 1);
  assert.equal(out.counts.due, 1);
});

test('reference + source + verified WITHIN cadence window → fresh, not in worklist', () => {
  const out = classifyFullPassDue([f({ verified: '2026-06-01' })], opts);
  assert.equal(out.worklist.length, 0);
  assert.equal(out.counts.fresh, 1);
});

test('verified EXACTLY at threshold (today − maxAgeDays) → fresh (strict <, mirrors incremental)', () => {
  // 2026-06-29 minus 90 days = 2026-03-31
  const out = classifyFullPassDue([f({ verified: '2026-03-31' })], opts);
  assert.equal(out.worklist.length, 0);
  assert.equal(out.counts.fresh, 1);
});

test('verified one day before threshold → cadence-due', () => {
  const out = classifyFullPassDue([f({ verified: '2026-03-30' })], opts);
  assert.equal(out.worklist.length, 1);
  assert.equal(out.worklist[0].reason, 'cadence-due');
});

test('reference declared but NO source → unsourced (cannot anchor full-pass), counted not listed', () => {
  const out = classifyFullPassDue([f({ source: null, verified: null })], opts);
  assert.equal(out.worklist.length, 0);
  assert.equal(out.counts.unsourced, 1);
});

test('template / methodology / regulatory → out-of-scope, never listed', () => {
  const out = classifyFullPassDue([
    f({ type: 'template', source: null, verified: null }),
    f({ type: 'methodology', source: null, verified: null }),
    f({ type: 'regulatory', source: null, verified: null }),
  ], opts);
  assert.equal(out.worklist.length, 0);
  assert.equal(out.counts.outOfScope, 3);
});

test('no Type header (legacy corpus) → unmigrated, counted but not listed (Spor 1 territory)', () => {
  const out = classifyFullPassDue([f({ type: null, source: null, verified: null })], opts);
  assert.equal(out.worklist.length, 0);
  assert.equal(out.counts.unmigrated, 1);
});

test('YYYY-MM verified normalizes to -01 for the cadence boundary', () => {
  // 2026-03 → 2026-03-01, which is before the 2026-03-31 threshold → due
  const out = classifyFullPassDue([f({ verified: '2026-03' })], opts);
  assert.equal(out.worklist.length, 1);
  assert.equal(out.worklist[0].reason, 'cadence-due');
});

test('worklist entry carries path, reason, verified, ageDays, source for the human', () => {
  const out = classifyFullPassDue([
    f({ path: 'skills/s/references/p.md', verified: '2026-02-01', source: 'https://learn.microsoft.com/p' }),
  ], opts);
  const e = out.worklist[0];
  assert.equal(e.path, 'skills/s/references/p.md');
  assert.equal(e.reason, 'cadence-due');
  assert.equal(e.verified, '2026-02-01');
  assert.equal(e.source, 'https://learn.microsoft.com/p');
  assert.equal(typeof e.ageDays, 'number');
});

test('ranking: never-verified before cadence-due; within cadence-due oldest verified first', () => {
  const out = classifyFullPassDue([
    f({ path: 'b-recent-stale.md', verified: '2026-02-01' }), // cadence-due, 148d
    f({ path: 'a-never.md', verified: null }),                // never-verified
    f({ path: 'c-oldest-stale.md', verified: '2026-01-01' }), // cadence-due, 179d
  ], opts);
  assert.deepEqual(out.worklist.map((e) => e.path), ['a-never.md', 'c-oldest-stale.md', 'b-recent-stale.md']);
});

test('mixed corpus aggregates counts; total = input length; due = worklist length', () => {
  const out = classifyFullPassDue([
    f({ verified: '2026-01-01' }),                          // cadence-due
    f({ verified: null }),                                  // never-verified
    f({ verified: '2026-06-20' }),                          // fresh
    f({ source: null, verified: null }),                   // unsourced
    f({ type: 'template', source: null, verified: null }), // out-of-scope
    f({ type: null, source: null, verified: null }),       // unmigrated
  ], opts);
  assert.equal(out.counts.total, 6);
  assert.equal(out.counts.cadenceDue, 1);
  assert.equal(out.counts.neverVerified, 1);
  assert.equal(out.counts.fresh, 1);
  assert.equal(out.counts.unsourced, 1);
  assert.equal(out.counts.outOfScope, 1);
  assert.equal(out.counts.unmigrated, 1);
  assert.equal(out.counts.due, 2);
  assert.equal(out.worklist.length, 2);
});

test('empty input → empty worklist, zeroed counts', () => {
  const out = classifyFullPassDue([], opts);
  assert.equal(out.worklist.length, 0);
  assert.equal(out.counts.total, 0);
  assert.equal(out.counts.due, 0);
});

// --- buildFullPassReport: assemble the report (pure; corpus paths + reader injected) ---

const SOURCE_MAP = new Map([
  ['due.md', '2026-06-15'], // annotation only — does NOT affect due-ness
  ['fresh.md', '2026-01-01'],
]);
const PATHS = ['due.md', 'fresh.md', 'gone.md', 'legacy.md'];
const READER = (p) => ({
  'due.md': { type: 'reference', source: 'https://learn.microsoft.com/due', verified: '2026-01-01' },
  'fresh.md': { type: 'reference', source: 'https://learn.microsoft.com/fresh', verified: '2026-06-20' },
  'gone.md': null, // deleted on disk
  'legacy.md': { type: null, source: null, verified: null },
}[p] ?? null);

test('buildFullPassReport — stamps metadata, joins headers, classifies by cadence', () => {
  const r = buildFullPassReport(PATHS, READER, SOURCE_MAP, opts);
  assert.equal(r.generated_at, TODAY);
  assert.equal(r.cadence_max_age_days, MAX_AGE);
  assert.equal(r.counts.due, 1);
  assert.equal(r.counts.fresh, 1);
  assert.equal(r.counts.unmigrated, 1);
  assert.equal(r.worklist.length, 1);
  assert.equal(r.worklist[0].path, 'due.md');
  assert.equal(r.worklist[0].reason, 'cadence-due');
});

test('buildFullPassReport — annotates worklist entry with newestSourceLastmod from the source map', () => {
  const r = buildFullPassReport(PATHS, READER, SOURCE_MAP, opts);
  assert.equal(r.worklist[0].newestSourceLastmod, '2026-06-15');
});

test('buildFullPassReport — deleted files (reader null) skipped entirely, not counted', () => {
  const r = buildFullPassReport(PATHS, READER, SOURCE_MAP, opts);
  assert.equal(r.counts.total, 3); // gone.md skipped
  assert.ok(!r.worklist.some((e) => e.path === 'gone.md'));
});

test('buildFullPassReport — no source map still works (annotation null)', () => {
  const r = buildFullPassReport(['due.md'], READER, new Map(), opts);
  assert.equal(r.worklist.length, 1);
  assert.equal(r.worklist[0].newestSourceLastmod, null);
});

// --- Spor 1 acceptance: worklist ACTIVATION + the **Verified:** MCP poison it fixes ---

test('acceptance — migrated reference headers (type+source, verified:null) land in never-verified; unmigrated===0', () => {
  const reader = (p) => ({
    'm1.md': { type: 'reference', source: 'https://learn.microsoft.com/1', verified: null },
    'm2.md': { type: 'reference', source: 'https://learn.microsoft.com/2', verified: null },
  }[p] ?? null);
  const r = buildFullPassReport(['m1.md', 'm2.md'], reader, new Map(), opts);
  assert.equal(r.counts.neverVerified, 2);
  assert.ok(r.counts.due > 0, 'the worklist activates — due>0');
  assert.equal(r.counts.unmigrated, 0, 'no legacy no-Type files remain');
  assert.ok(r.worklist.every((e) => e.reason === 'never-verified'));
});

// The poison, exercised through the REAL parser + normalizer (not a hand-forged
// header value): a header-region `**Verified:** MCP <date>` parses to the non-date
// token 'MCP', which the cadence classifier reads as a recent verification and drops
// the file to `fresh` — omitted from the worklist AND falsely "verified". This is the
// exact failure mode normalizeStaleVerified removes.
const POISONED =
  '# Poisoned Ref\n\n**Status:** GA\n**Verified:** MCP 2026-06\n**Type:** reference\n' +
  '**Source:** https://learn.microsoft.com/x\n\n---\n\n## A\n\ntekst\n';
const hdr = (c) => ({ type: parseTypeHeader(c), source: parseSourceHeader(c), verified: parseVerifiedHeader(c) });

test('acceptance — **Verified:** MCP poison drops a never-verified ref to fresh (the bug the normalizer fixes)', () => {
  assert.equal(parseVerifiedHeader(POISONED), 'MCP'); // the poison: a non-date token read as "verified"
  const r = buildFullPassReport(['p.md'], (p) => ({ 'p.md': hdr(POISONED) }[p] ?? null), new Map(), opts);
  assert.equal(r.counts.fresh, 1, 'wrongly counted fresh');
  assert.equal(r.worklist.length, 0, 'omitted from the worklist — the poison');
  assert.equal(r.counts.unmigrated, 0);
});

test('acceptance — normalizeStaleVerified restores the poisoned file to a due never-verified entry', () => {
  const fixed = normalizeStaleVerified(POISONED);
  assert.equal(parseVerifiedHeader(fixed), null); // stale token stripped
  assert.equal(parseTypeHeader(fixed), 'reference'); // Type/Source untouched
  assert.equal(parseSourceHeader(fixed), 'https://learn.microsoft.com/x');
  const r = buildFullPassReport(['p.md'], (p) => ({ 'p.md': hdr(fixed) }[p] ?? null), new Map(), opts);
  assert.equal(r.worklist.length, 1);
  assert.equal(r.worklist[0].reason, 'never-verified');
  assert.ok(r.counts.due > 0);
});