import { test } from 'node:test';
import assert from 'node:assert/strict';
import { validateQueue, ENTRY_CLASSES, ENTRY_STATES } from '../../scripts/kb-eval/lib/g7-queue.mjs';

// A queue entry is the ONLY thing standing between a real defect and silent loss,
// so the checks here are deliberately unforgiving about shape and about anchors
// that no longer exist in the corpus.

const okEntry = () => ({
  id: 'idx-99',
  file: 'skills/x/references/y.md',
  class: 'multi-locator',
  status: 'open',
  raised: '2026-08-03',
  summary: 'Something the file asserts in two places.',
  evidence: 'docs/r11-pilot-results.md §9.6',
  anchors: ['the exact text'],
});

const stub = (contents) => (p) => {
  if (!(p in contents)) throw new Error(`ENOENT ${p}`);
  return contents[p];
};

test('a well-formed open entry whose anchor is present passes', () => {
  const r = validateQueue([okEntry()], stub({ 'skills/x/references/y.md': 'aaa the exact text bbb' }));
  assert.equal(r.ok, true);
  assert.deepEqual(r.findings, []);
});

test('vocabularies are closed', () => {
  assert.deepEqual([...ENTRY_CLASSES].sort(), ['multi-locator', 'replacement']);
  assert.deepEqual([...ENTRY_STATES].sort(), ['open', 'resolved']);
});

test('unknown class is rejected', () => {
  const e = { ...okEntry(), class: 'deletion' };
  const r = validateQueue([e], stub({ 'skills/x/references/y.md': 'the exact text' }));
  assert.equal(r.ok, false);
  assert.match(r.findings[0].message, /class/);
});

test('unknown status is rejected', () => {
  const e = { ...okEntry(), status: 'wontfix' };
  const r = validateQueue([e], stub({ 'skills/x/references/y.md': 'the exact text' }));
  assert.equal(r.ok, false);
  assert.match(r.findings[0].message, /status/);
});

test('a missing required field is reported by name', () => {
  const e = okEntry();
  delete e.evidence;
  const r = validateQueue([e], stub({ 'skills/x/references/y.md': 'the exact text' }));
  assert.equal(r.ok, false);
  assert.match(r.findings[0].message, /evidence/);
});

test('an open entry MUST carry at least one anchor', () => {
  const e = { ...okEntry(), anchors: [] };
  const r = validateQueue([e], stub({ 'skills/x/references/y.md': 'the exact text' }));
  assert.equal(r.ok, false);
  assert.match(r.findings[0].message, /anchor/i);
});

// The point of the whole mechanism: a defect must not be able to leave the queue
// just because someone edited the file around it.
test('an open entry whose anchor no longer occurs is a DRIFT finding, not a pass', () => {
  const r = validateQueue([okEntry()], stub({ 'skills/x/references/y.md': 'nothing matching here' }));
  assert.equal(r.ok, false);
  assert.equal(r.findings[0].kind, 'anchor_drift');
  assert.match(r.findings[0].message, /the exact text/);
});

test('every anchor is checked, not just the first', () => {
  const e = { ...okEntry(), anchors: ['present', 'absent'] };
  const r = validateQueue([e], stub({ 'skills/x/references/y.md': 'present only' }));
  assert.equal(r.ok, false);
  assert.equal(r.findings.length, 1);
  assert.match(r.findings[0].message, /absent/);
});

test('a missing file is reported rather than thrown', () => {
  const r = validateQueue([okEntry()], stub({}));
  assert.equal(r.ok, false);
  assert.equal(r.findings[0].kind, 'file_unreadable');
});

test('a resolved entry MUST record how it was resolved', () => {
  const e = { ...okEntry(), status: 'resolved' };
  const r = validateQueue([e], stub({ 'skills/x/references/y.md': 'whatever' }));
  assert.equal(r.ok, false);
  assert.match(r.findings[0].message, /resolution/);
});

test('a resolved entry is exempt from anchor checking', () => {
  const e = { ...okEntry(), status: 'resolved', resolution: 'colon -> period, ratified 2026-08-03' };
  const r = validateQueue([e], stub({ 'skills/x/references/y.md': 'anchor is long gone' }));
  assert.equal(r.ok, true);
});

test('duplicate ids are rejected', () => {
  const r = validateQueue([okEntry(), okEntry()], stub({ 'skills/x/references/y.md': 'the exact text' }));
  assert.equal(r.ok, false);
  assert.match(r.findings[0].message, /duplicate/i);
});

test('findings from several entries are all reported', () => {
  const a = { ...okEntry(), id: 'idx-1' };
  const b = { ...okEntry(), id: 'idx-2', anchors: ['gone'] };
  const r = validateQueue([a, b], stub({ 'skills/x/references/y.md': 'the exact text' }));
  assert.equal(r.ok, false);
  assert.equal(r.findings.length, 1);
  assert.equal(r.findings[0].id, 'idx-2');
});

test('a non-array queue is rejected without throwing', () => {
  const r = validateQueue({ entries: [] }, stub({}));
  assert.equal(r.ok, false);
  assert.match(r.findings[0].message, /array/i);
});

// A class-wide entry books ONE finding that lives in many files. Booking it as a
// single-file entry was measured to hide 41 of 42 locators from the gate — the
// 795d494 failure, a locator alive only in prose while both gates go green. So an
// anchor may also be a { file, text } pair, checked against ITS OWN file.
test('a { file, text } anchor is checked against its own file, not entry.file', () => {
  const e = { ...okEntry(), anchors: [{ file: 'skills/x/references/other.md', text: 'over here' }] };
  const r = validateQueue(
    [e],
    stub({ 'skills/x/references/y.md': 'nothing matching', 'skills/x/references/other.md': 'aaa over here bbb' }),
  );
  assert.equal(r.ok, true);
  assert.deepEqual(r.findings, []);
});

test('a { file, text } anchor absent from its own file DRIFTS, and the finding names that file', () => {
  const e = { ...okEntry(), anchors: [{ file: 'skills/x/references/other.md', text: 'over here' }] };
  const r = validateQueue(
    [e],
    stub({ 'skills/x/references/y.md': 'over here', 'skills/x/references/other.md': 'empty' }),
  );
  assert.equal(r.ok, false);
  assert.equal(r.findings[0].kind, 'anchor_drift');
  assert.match(r.findings[0].message, /other\.md/);
  // Discriminating: entry.file DOES contain the text, so a message blaming y.md
  // would mean the anchor was looked up in the wrong file. Without this line the
  // test passes against the old code, which serialises the object into the
  // message and matches /other\.md/ by accident.
  assert.doesNotMatch(r.findings[0].message, /y\.md/);
});

test('string and { file, text } anchors mix in one entry, and BOTH are checked', () => {
  const e = { ...okEntry(), anchors: ['the exact text', { file: 'skills/x/references/other.md', text: 'gone' }] };
  const r = validateQueue(
    [e],
    stub({ 'skills/x/references/y.md': 'the exact text', 'skills/x/references/other.md': 'not it' }),
  );
  assert.equal(r.ok, false);
  assert.equal(r.findings.length, 1);
  assert.match(r.findings[0].message, /gone/);
  // Discriminating, for the same reason: the surviving string anchor is present
  // in entry.file, so the drift must be reported against other.md.
  assert.match(r.findings[0].message, /other\.md/);
  assert.doesNotMatch(r.findings[0].message, /y\.md/);
});

test('an unreadable per-anchor file is reported, not thrown, and names that file', () => {
  const e = { ...okEntry(), anchors: [{ file: 'skills/x/references/missing.md', text: 'whatever' }] };
  const r = validateQueue([e], stub({ 'skills/x/references/y.md': 'the exact text' }));
  assert.equal(r.ok, false);
  assert.equal(r.findings[0].kind, 'file_unreadable');
  assert.match(r.findings[0].message, /missing\.md/);
});

// Without this, a typo'd anchor object would be checked against nothing and the
// entry would pass — a defect leaving the programme unnoticed, which is the one
// outcome the queue exists to prevent.
test('a malformed anchor object is a schema fault, never a silent pass', () => {
  const e = { ...okEntry(), anchors: [{ file: 'skills/x/references/other.md' }] };
  const r = validateQueue([e], stub({ 'skills/x/references/y.md': 'x', 'skills/x/references/other.md': 'x' }));
  assert.equal(r.ok, false);
  assert.equal(r.findings[0].kind, 'schema');
  assert.match(r.findings[0].message, /anchor/i);
});

test('the real queue file validates against the live corpus', async () => {
  const { readFileSync } = await import('node:fs');
  const queue = JSON.parse(readFileSync('scripts/kb-eval/data/g7-review-queue.json', 'utf8'));
  const r = validateQueue(queue.entries, (p) => readFileSync(p, 'utf8'));
  assert.deepEqual(r.findings, [], `G7 queue drifted: ${JSON.stringify(r.findings, null, 2)}`);
  assert.equal(r.ok, true);
});