// tests/lib/run-coupling-prose-pins.test.mjs
// The coupling to Claude Code's built-in `run` skill (wave 4, order A2,
// decisions 54 and 64). The plan's "run the thing" step, the executor's
// `### End to end` and the plan template's run step each say in one sentence
// that the app is seen and driven with `run`, and that the verdict is still
// the `End-to-end:` command, because `run` gives no exit code. Each part is
// read by its heading or marker, never by line number.

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 { sectionText } from '../helpers/md-section.mjs';

const ROOT = join(dirname(fileURLToPath(import.meta.url)), '..', '..');
const read = (rel) => readFileSync(join(ROOT, rel), 'utf8');

/** From the line holding `marker` to the first line where `stop` is true. */
function partAt(rel, marker, stop) {
  const lines = read(rel).split('\n');
  const start = lines.findIndex((l) => l.includes(marker));
  assert.ok(start !== -1, `${rel} must hold "${marker}"`);
  let end = lines.length;
  for (let i = start + 1; i < lines.length; i++) if (stop(lines[i])) { end = i; break; }
  return lines.slice(start, end).join(' ').replace(/\s+/g, ' ');
}

const PARTS = [
  // An indented paragraph of a numbered list item: it ends at a blank or unindented line.
  ['commands/trekplan.md', '**The "run the thing" step.**', (l) => l.trim() === '' || /^\S/.test(l)],
  ['commands/trekexecute.md', '### End to end — "run the thing" (P9 (6))', (l) => l.startsWith('### ')],
  ['templates/plan-template.md', '### Step 2: {description — the "run the thing" step}', (l) => l.startsWith('### ')],
];

// The template quotes the names instead of backticking them: every backticked
// span on a template step bullet is read as a runnable example
// (tests/lib/skills-criteria-prose-pins.test.mjs), and `run` is no command.
const RUN = '(?:`run`|"run")';
for (const [rel, marker, stop] of PARTS) {
  test(`run coupling: ${rel} names Claude Code's run and keeps the verdict on the End-to-end: command`, () => {
    const p = partAt(rel, marker, stop);
    assert.match(p, new RegExp(`Claude Code's built-in ${RUN} skill`), `${rel}: the run step must name Claude Code's built-in run`);
    assert.match(p, /the verdict is still the `?End-to-end:`? command/, `${rel}: the verdict must stay the End-to-end: command`);
    assert.match(p, new RegExp(`${RUN} gives no exit code`), `${rel}: the reason must be said`);
  });
}

test('run coupling: the run step still says what it runs, through the criteria runner', () => {
  const p = partAt(...PARTS[0]);
  assert.match(p, /criteria runner's allowlist/);
  assert.match(p, /End-to-end: \\`bash tests\/e2e\.sh\\`/);
});

test('run coupling: the writing-criteria quiet case is owned by run, with no stand-in left in its description', () => {
  const md = read('evals/skill-writing-criteria-quiet-2/prompt.md');
  assert.match(md, /^tags: \[[^\]]*\bowner=run\b[^\]]*\]$/m);
  assert.doesNotMatch(md, /stands in/);
  assert.doesNotMatch(md, /owner=trekexecute/);
});

// The final report says whether the app was seen with `run`, for every run,
// also one with no app to launch (the "no — {reason}" form).
const EXEC = 'commands/trekexecute.md';

/** Phase 8 of /trekexecute, read up to Phase 9 (its report fence holds its own `## ` heading). */
function phase8(text) {
  const start = text.indexOf('## Phase 8 — Final report');
  const end = text.indexOf('## Phase 9');
  assert.ok(start !== -1 && end > start, 'Phase 8 — Final report and Phase 9 must both exist, in that order');
  return text.slice(start, end);
}

test('run_seen: the Phase 8 report template says, right after End to end, whether the app was seen with `run`', () => {
  const lines = phase8(read(EXEC)).split('\n');
  const e2e = lines.findIndex((l) => l.startsWith('**End to end:**'));
  assert.ok(e2e !== -1, 'the report template has no **End to end:** line');
  assert.equal(lines[e2e + 1], '**Seen with `run`:** {yes | no — {reason}}',
    'the line after **End to end:** is not the "Seen with `run`" line in its yes / no — {reason} form');
});

test('run_seen: the summary JSON carries "run_seen" right after "end_to_end"', () => {
  const text = read(EXEC);
  const sumIdx = text.indexOf('"trekexecute_summary": {');
  assert.ok(sumIdx !== -1, 'summary JSON block missing');
  const lines = text.slice(sumIdx, text.indexOf('\n```', sumIdx)).split('\n').map((l) => l.trim());
  const e2e = lines.findIndex((l) => l.startsWith('"end_to_end":'));
  assert.ok(e2e !== -1, 'the summary JSON has no "end_to_end" key');
  assert.equal(lines[e2e + 1], '"run_seen": "{yes | no — reason}",',
    'the key after "end_to_end" is not "run_seen" with its yes / no — reason value');
});

test('run_seen: the End to end section says to record run_seen, also when no app was seen, and keeps the End-to-end: command as the verdict', () => {
  const s = sectionText(read(EXEC), PARTS[1][1]).replace(/\s+/g, ' ');
  assert.match(s, /Record `run_seen`: `yes` when the app was seen and driven with Claude Code's built-in `run` in this run, else `no — \{reason\}`/,
    'the End to end section does not say to record run_seen as yes, or no with a reason');
  assert.match(s, /no app to launch/, 'the no-form does not name the run with no app to launch');
  assert.match(s, /The verdict is still the `End-to-end:` command\./,
    'the End to end section no longer says the End-to-end: command is the verdict');
});

// /trekexecute keeps `run_seen` in the progress file (template, field table,
// Phase 7) and Phase 8 reads it from there, so the resume and multi-session
// paths report it; Handover 5 lists it as optional (fix round 4-5b, E14).

/** The text from the line holding `start` up to (not including) the next line holding `stop`; both must exist. */
function between(rel, start, stop) {
  const text = read(rel);
  const s = text.indexOf(start);
  assert.ok(s !== -1, `${rel} must hold "${start}"`);
  const e = text.indexOf(stop, s + start.length);
  assert.ok(e !== -1, `${rel} must hold "${stop}" after "${start}"`);
  return text.slice(s, e);
}

/** Every sentence of `text` (flattened) that holds `needle`. */
function sentencesWith(text, needle) {
  return text.replace(/\s+/g, ' ').trim().split(/(?<=\.)\s+(?=[A-Z`"*(])/).filter((s) => s.includes(needle));
}

/** The progress-file template of /trekexecute's Phase 3, parsed as JSON. */
function progressTemplate() {
  const block = between(EXEC, '### Progress file schema', '**The step-loop fields');
  const m = block.match(/```json\n([\s\S]*?)\n```/);
  assert.ok(m, 'the Progress file schema section holds no ```json block');
  return JSON.parse(m[1]);
}

test('[E14] the progress template carries run_seen', () => {
  const tpl = progressTemplate();
  assert.ok(Object.prototype.hasOwnProperty.call(tpl, 'run_seen'),
    'the progress template has no top-level run_seen field');
  assert.equal(tpl.run_seen, null, `the progress template's run_seen is not null: ${JSON.stringify(tpl.run_seen)}`);
  assert.ok(!Object.prototype.hasOwnProperty.call(tpl.steps['1'], 'run_seen'),
    'run_seen sits in the per-step record, not at the top level');
});

test('[E14] the field table describes run_seen', () => {
  const table = between(EXEC, '**The step-loop fields', '**The coupling fields');
  const rows = table.split('\n').filter((l) => l.startsWith('| `run_seen` |'));
  assert.equal(rows.length, 1, `the step-loop field table must hold exactly one run_seen row; found ${rows.length}`);
  const cells = rows[0].split(' | ');
  assert.match(cells[1], /^Phase 7$/, `the run_seen row is not written in Phase 7: ${rows[0]}`);
  assert.match(rows[0], /Claude Code's (built-in )?`run`/, `the run_seen row does not say it is what Claude Code's run showed: ${rows[0]}`);
  assert.match(rows[0], /`null` = not run/, `the run_seen row does not say null = not run: ${rows[0]}`);
});

test('[E14] Phase 8 reads run_seen from progress.json', () => {
  const p7 = between(EXEC, '### End to end — "run the thing"', '### Architecture rules (K5)');
  const rec = sentencesWith(p7, 'Record `run_seen`');
  assert.equal(rec.length, 1, `Phase 7 must hold one "Record \`run_seen\`" sentence; found ${rec.length}`);
  assert.match(rec[0], /\bin the progress file\b|\bto the progress file\b|`progress\.json`/,
    `Phase 7 records run_seen without writing it to the progress file: ${rec[0]}`);
  const p8 = between(EXEC, '## Phase 8 — Final report', '## Phase 9 — Stats tracking');
  const hits = sentencesWith(p8, '`run_seen`');
  const ok = hits.find((s) => /\bread\b|\breads\b/.test(s)
    && /progress file|`progress\.json`/.test(s)
    && /\*\*Seen with `run`:\*\*/.test(s)
    && /summary/.test(s)
    && /resume/.test(s) && /multi-session/.test(s));
  assert.ok(ok, `no Phase 8 sentence says the Seen with run line and the summary's run_seen are read from the progress file, so the resume and multi-session paths report it: ${hits.join(' | ')}`);
});

test('[E14] Handover 5 lists run_seen as optional', () => {
  const h5 = between('docs/HANDOVER-CONTRACTS.md', '## Handover 5 ', '## Handover 6 ');
  const rows = h5.split('\n').filter((l) => l.startsWith('| `run_seen` |'));
  assert.equal(rows.length, 1, `Handover 5 must hold exactly one run_seen row; found ${rows.length}`);
  const cells = rows[0].split(' | ');
  assert.equal(cells[2], 'optional', `the run_seen row's Required cell is not "optional": ${rows[0]}`);
  assert.match(rows[0], /additive/, `the run_seen row does not say the field is additive: ${rows[0]}`);
  assert.match(rows[0], /Phase 7/, `the run_seen row does not say Phase 7 records it: ${rows[0]}`);
});