// tests/commands/trekresearch.test.mjs
// v5.1 prose-pin tests + v5.1.1 runtime SC4 + SC7 tests for /trekresearch.

import { test } from 'node:test';
import { strict as assert } from 'node:assert';
import { readFileSync } from 'node:fs';
import { dirname, join } from 'node:path';
import { fileURLToPath } from 'node:url';
import { resolvePhaseSignal } from '../../lib/profiles/phase-signal-resolver.mjs';
import { validateBriefContent } from '../../lib/validators/brief-validator.mjs';
import { parseDocument } from '../../lib/util/frontmatter.mjs';

const HERE = dirname(fileURLToPath(import.meta.url));
const ROOT = join(HERE, '..', '..');
const COMMAND_FILE = join(ROOT, 'commands', 'trekresearch.md');
const PHASE = 'research';

function read() { return readFileSync(COMMAND_FILE, 'utf8'); }
function readFixture(name) { return readFileSync(join(ROOT, 'tests', 'fixtures', name), 'utf8'); }
function frontmatterOf(text) {
  const doc = parseDocument(text);
  return doc.parsed && doc.parsed.frontmatter;
}

// --- Pattern D prose-pins ---

test('trekresearch — sequencing-gate surface mentions BRIEF_V51_MISSING_SIGNALS + phase_signals', () => {
  const text = read();
  assert.ok(text.includes('BRIEF_V51_MISSING_SIGNALS'),
    '/trekresearch must surface the BRIEF_V51_MISSING_SIGNALS sequencing gate');
  assert.ok(text.includes('phase_signals'),
    '/trekresearch must reference phase_signals (v5.1 composition rule)');
});

test('trekresearch — low-effort path references --quick equivalent', () => {
  const text = read();
  // Bound the Composition rule section by the next `###` heading rather than a
  // magic 2000-character window: a fixed count silently drops the match as soon
  // as prose is inserted above it, turning a real pin into a no-op.
  const sectionOf = (doc) => {
    const compIdx = doc.indexOf('## Composition rule (v5.1)');
    assert.ok(compIdx >= 0, 'Composition rule (v5.1) section missing');
    const nextHeading = doc.indexOf('\n### ', compIdx);
    return nextHeading > compIdx ? doc.slice(compIdx, nextHeading) : doc.slice(compIdx);
  };

  // (a) positive: the low-effort path is documented inside the bounded section.
  assert.match(sectionOf(text), /--quick/, 'Low-effort path must mention --quick equivalent');

  // (b) negative: an actual removal must still be caught — a bound that can
  //     never fail proves nothing.
  const mutated = text.replace(/--quick/g, '--removed');
  assert.doesNotMatch(sectionOf(mutated), /--quick/,
    'heading-bounded slice must still fail on a genuine removal');
});

// --- Step 7: Phase 5 bounded conversation loop (heading-bounded slices) ---

// Same bounding discipline as the Composition-rule pin above: slice from the
// phase heading to the NEXT phase heading, never a fixed character window.
function phaseSlice(doc, startHeading, endHeading) {
  const start = doc.indexOf(startHeading);
  assert.ok(start >= 0, `${startHeading} missing`);
  const end = doc.indexOf(endHeading, start);
  assert.ok(end > start, `${endHeading} missing — could not bound ${startHeading}`);
  return doc.slice(start, end);
}

function phase5(doc) {
  return phaseSlice(doc, '## Phase 5 —', '## Phase 6 —');
}

test('trekresearch — Phase 5 loop is gated on effort == high and names both primitives', () => {
  const p5 = phase5(read());
  assert.match(p5, /effort == 'high'/, 'Phase 5 loop must be gated on effort == \'high\'');
  assert.match(p5, /research-loop-cap\.mjs/, 'Phase 5 must call the loop-cap shim per turn');
  assert.match(p5, /query-privacy-gate\.mjs/, 'Phase 5 must route outbound queries through the privacy gate');
  assert.match(p5, /\$\{CLAUDE_PLUGIN_ROOT\}/, 'shim invocations must use the ${CLAUDE_PLUGIN_ROOT} path form');
});

test('trekresearch — Phase 5 declares the loop bound and all three exits', () => {
  const p5 = phase5(read());
  assert.match(p5, /### Loop bound/, 'Phase 5 must carry a `### Loop bound` sub-heading');
  assert.match(
    p5,
    /\*\*Maximum 3 turns per under-illuminated dimension\.\*\*/,
    'the bound must be stated verbatim',
  );
  // Three exits — converged / cap exhausted / operator stop.
  assert.match(p5, /converged/i, 'exit 1 (converged) must be documented');
  assert.match(p5, /exhaust/i, 'exit 2 (cap exhausted) must be documented');
  assert.match(p5, /operator stop/i, 'exit 3 (operator stop) must be documented');
  // Exhaustion must reach the operator — a silent cap is indistinguishable
  // from convergence, which is the failure this loop exists to avoid.
  assert.match(
    p5,
    /visibl|visible|print/i,
    'cap exhaustion must be written visibly to the operator',
  );
});

test('trekresearch — Phase 5 marks empty turns without re-targeting the same dimension', () => {
  const p5 = phase5(read());
  assert.match(p5, /`empty`/, 'a finding-less or citation-less turn must be marked `empty`');
  assert.match(p5, /empty_turns/, 'empty turns must be counted (empty_turns)');
  assert.match(
    p5,
    /does NOT re-target|not re-target/i,
    'an empty turn must not re-target the same dimension',
  );
});

test('trekresearch — Phase 5 states the no-brief default and the moot precedence matrix', () => {
  const p5 = phase5(read());
  // (a) no-brief default
  assert.match(p5, /effort = 'standard'/, 'no-brief default effort must be stated');
  assert.match(
    p5,
    /--project/,
    'the no-brief default must be anchored to the absence of --project/brief.md',
  );
  // (b) precedence matrix — each entry independently makes the loop moot,
  //     mirroring the --engine moot gate in Phase 4.
  for (const token of ['--quick', '--local', 'external_research_enabled']) {
    assert.ok(p5.includes(token), `moot matrix must name ${token}`);
  }
  assert.match(p5, /moot/i, 'the matrix must use the same moot vocabulary as the engine gate');
  // (c) interaction rule — effort: high without model under a cheap profile.
  assert.match(
    p5,
    /effort: high/,
    'the interaction rule for a brief carrying effort: high without model must be stated',
  );
});

test('trekresearch — Phase 5 restates the honesty rule for loop output', () => {
  const p5 = phase5(read());
  // Whitespace-tolerant: the pin is on the sentence, not on where the
  // paragraph happens to wrap.
  assert.match(
    p5,
    /more\s+turns\s+do\s+not\s+make\s+a\s+finding\s+more\s+credible/i,
    'the honesty hard rule must be restated for the loop output',
  );
});

test('trekresearch — Phase 5 pins survive only while the prose does (mutation control)', () => {
  const text = read();
  const mutated = text.replace(/research-loop-cap\.mjs/g, 'removed-cap.mjs');
  assert.doesNotMatch(
    phase5(mutated),
    /research-loop-cap\.mjs/,
    'heading-bounded Phase 5 slice must still fail on a genuine removal',
  );
});

test('trekresearch — High-effort behavior keeps the standard/low effort sentences verbatim', () => {
  const text = read();
  assert.ok(
    text.includes('Standard effort (or absent): use the existing conditional triggers.'),
    'the standard-effort sentence must survive the Phase 5 rewrite verbatim',
  );
  assert.ok(
    text.includes('Low effort: inline research only, no agent swarm'),
    'the low-effort sentence must survive the Phase 5 rewrite verbatim',
  );
});

// --- v5.1.1 runtime SC4 + SC7 ---

test('trekresearch — SC4: low-effort fixture → resolver returns {effort: low, model: sonnet}', () => {
  const fm = frontmatterOf(readFixture('brief-effort-low.md'));
  const r = resolvePhaseSignal(fm, PHASE);
  assert.equal(r.effort, 'low');
  assert.equal(r.model, 'sonnet');
});

test('trekresearch — SC4: standard-effort fixture → resolver returns {effort: standard, model: undefined}', () => {
  const fm = frontmatterOf(readFixture('brief-effort-standard.md'));
  const r = resolvePhaseSignal(fm, PHASE);
  assert.equal(r.effort, 'standard');
  assert.equal(r.model, undefined);
});

test('trekresearch — SC4: high-effort fixture → resolver returns {effort: high, model: opus}', () => {
  const fm = frontmatterOf(readFixture('brief-effort-high.md'));
  const r = resolvePhaseSignal(fm, PHASE);
  assert.equal(r.effort, 'high');
  assert.equal(r.model, 'opus');
});

test('trekresearch — SC7: brief_version 2.1 + no phase_signals + no partial → BRIEF_V51_MISSING_SIGNALS', () => {
  const r = validateBriefContent(readFixture('brief-v21-no-signals.md'), { strict: true });
  assert.equal(r.valid, false);
  assert.ok(
    r.errors.find(e => e.code === 'BRIEF_V51_MISSING_SIGNALS'),
    `sequencing gate must fire; errors=${JSON.stringify(r.errors)}`,
  );
});