// tests/lib/stats-landing.test.mjs
// Veikart steg 1, økt 2's countable form: after a real /trekbrief → /trekplan run
// there must be (1) a `brief-approved` record with the slug, (2) a trekbrief-stats
// record with `intent_approved: true`, and (3) a trekplan-stats record with the
// same slug — all in the directory scripts/yardstick.mjs reads.
//
// The Bash tool's env carries no CLAUDE_PLUGIN_DATA. Phase 7 of /trekbrief and
// Phase 12 of /trekplan used to say "if ${CLAUDE_PLUGIN_DATA} is not set, skip
// silently" — the same silent skip that left brief-approved at 0 records. These
// tests execute the command lines the prose spells, with CLAUDE_PLUGIN_DATA
// EMPTY, and require the records to land in the yardstick's directory.

import { test } from 'node:test';
import { strict as assert } from 'node:assert';
import { spawnSync } from 'node:child_process';
import { existsSync, mkdirSync, mkdtempSync, readFileSync, rmSync, writeFileSync } from 'node:fs';
import { tmpdir } from 'node:os';
import { dirname, join } from 'node:path';
import { fileURLToPath } from 'node:url';

const HERE = dirname(fileURLToPath(import.meta.url));
const ROOT = join(HERE, '..', '..');
const read = (rel) => readFileSync(join(ROOT, rel), 'utf8');
const DATA_REL = join('.claude', 'plugins', 'data', 'voyage-ktg-plugin-marketplace');

/** The text of `## <heading>` up to the next `## ` heading. */
function section(rel, heading) {
  const text = read(rel);
  const start = text.indexOf(`\n## ${heading}`);
  assert.ok(start >= 0, `${rel} must have "## ${heading}"`);
  const next = text.indexOf('\n## ', start + 1);
  return next < 0 ? text.slice(start) : text.slice(start, next);
}

/** The one line in `sec` that runs stats-append.mjs for `kind`. */
function appendLine(sec, kind, rel) {
  const lines = sec.split('\n').filter((l) =>
    /^\s*node \$\{CLAUDE_PLUGIN_ROOT\}\/lib\/stats\/stats-append\.mjs\b/.test(l) && l.includes(` ${kind}`));
  assert.equal(lines.length, 1, `${rel} must carry exactly one \`stats-append.mjs ${kind}\` line; found ${lines.length}`);
  return lines[0].trim().replace(/\s*<<-?'?JSON'?\s*$/, '');
}

/** Run a prose command line with a record on stdin, CLAUDE_PLUGIN_DATA empty, HOME = home. */
function runLine(line, record, home) {
  const cmd = line.split('${CLAUDE_PLUGIN_ROOT}').join(ROOT);
  return spawnSync('bash', ['-c', cmd], {
    encoding: 'utf8',
    input: JSON.stringify(record),
    env: { ...process.env, CLAUDE_PLUGIN_DATA: '', HOME: home },
  });
}

function records(file) {
  return readFileSync(file, 'utf8').trim().split('\n').filter(Boolean).map((l) => JSON.parse(l));
}

const TB = 'commands/trekbrief.md';
const TP = 'commands/trekplan.md';

test('M6: /trekbrief Phase 7 writes through stats-append (code), not "skip silently" (prose)', () => {
  const sec = section(TB, 'Phase 7');
  appendLine(sec, 'trekbrief', TB);
  assert.doesNotMatch(sec, /skip silently/i, 'a silent skip is how the record never landed');
  assert.match(sec, /"intent_approved"/);
  assert.match(sec, /"slug"/);
});

test('M6: /trekplan Phase 12 writes through stats-append (code), not "skip silently" (prose)', () => {
  const sec = section(TP, 'Phase 12');
  appendLine(sec, 'trekplan', TP);
  assert.doesNotMatch(sec, /skip (tracking )?silently/i);
  assert.match(sec, /"slug"/);
});

test('M6: with CLAUDE_PLUGIN_DATA empty the trekbrief record (intent_approved) lands where the yardstick reads', () => {
  const home = mkdtempSync(join(tmpdir(), 'stats-landing-'));
  try {
    const line = appendLine(section(TB, 'Phase 7'), 'trekbrief', TB);
    const r = runLine(line, { ts: '2026-09-23T10:00:00Z', slug: 'dark-mode-toggle', intent_approved: true }, home);
    assert.equal(r.status, 0, `stats-append failed: ${r.stdout} ${r.stderr}`);
    const file = join(home, DATA_REL, 'trekbrief-stats.jsonl');
    assert.ok(existsSync(file), `record must land in ${file}`);
    const recs = records(file);
    assert.equal(recs.length, 1);
    assert.equal(recs[0].intent_approved, true);
    assert.equal(recs[0].slug, 'dark-mode-toggle');
  } finally { rmSync(home, { recursive: true, force: true }); }
});

test('M6: a failed write is reported, never silent (exit 1 + reason on stdout)', () => {
  const home = mkdtempSync(join(tmpdir(), 'stats-landing-'));
  try {
    // the data dir path is occupied by a FILE, so the directory cannot be created
    mkdirSync(join(home, '.claude', 'plugins', 'data'), { recursive: true });
    writeFileSync(join(home, DATA_REL), 'not a directory');
    const line = appendLine(section(TB, 'Phase 7'), 'trekbrief', TB);
    const r = runLine(line, { ts: '2026-09-23T10:00:00Z', slug: 'x', intent_approved: false }, home);
    assert.equal(r.status, 1);
    const out = JSON.parse(r.stdout);
    assert.equal(out.written, false);
    assert.ok(out.reason && out.reason.length > 0, r.stdout);
  } finally { rmSync(home, { recursive: true, force: true }); }
});

test('M6: stats-append refuses a record that is not a JSON object, and an unknown kind', () => {
  const home = mkdtempSync(join(tmpdir(), 'stats-landing-'));
  try {
    const cli = join(ROOT, 'lib', 'stats', 'stats-append.mjs');
    const env = { ...process.env, CLAUDE_PLUGIN_DATA: '', HOME: home };
    const bad = spawnSync('node', [cli, 'trekbrief'], { encoding: 'utf8', input: 'not json', env });
    assert.equal(bad.status, 1, bad.stdout + bad.stderr);
    assert.equal(JSON.parse(bad.stdout).written, false);
    const unknown = spawnSync('node', [cli, 'no-such-command'], { encoding: 'utf8', input: '{}', env });
    assert.equal(unknown.status, 1);
    assert.ok(!existsSync(join(home, DATA_REL, 'no-such-command-stats.jsonl')));
  } finally { rmSync(home, { recursive: true, force: true }); }
});

test('M6: økt 2\'s countable form lands end to end with CLAUDE_PLUGIN_DATA empty (stamp → trekbrief → trekplan)', async () => {
  const home = mkdtempSync(join(tmpdir(), 'stats-landing-'));
  const proj = mkdtempSync(join(tmpdir(), 'stats-landing-proj-'));
  try {
    writeFileSync(join(proj, 'brief.md'), `---
type: trekbrief
brief_version: "2.1"
task: "Add a dark-mode toggle to a recipe app"
slug: dark-mode-toggle
---

## Intent

Readers cook in dim kitchens and the bright page glares.

## Goal

A toggle in settings, defaulting to the system theme.
`);
    // (1) the Phase 4h stamp line, as trekbrief.md spells it
    const stampLine = read(TB).split('\n').find((l) =>
      /^\s*node \$\{CLAUDE_PLUGIN_ROOT\}\/lib\/validators\/intent-approval\.mjs\b.*--stamp/.test(l));
    assert.ok(stampLine, 'trekbrief.md must carry the --stamp line');
    let cmd = stampLine.trim().split('${CLAUDE_PLUGIN_ROOT}').join(ROOT);
    cmd = cmd.split('{BRIEF_PATH}').join(join(proj, 'brief.md')).split('{PROJECT_DIR}').join(proj);
    const s = spawnSync('bash', ['-c', cmd], { encoding: 'utf8', env: { ...process.env, CLAUDE_PLUGIN_DATA: '', HOME: home } });
    assert.equal(s.status, 0, s.stdout + s.stderr);
    // (2) and (3): the stats lines
    assert.equal(runLine(appendLine(section(TB, 'Phase 7'), 'trekbrief', TB),
      { ts: '2026-09-23T10:00:00Z', slug: 'dark-mode-toggle', intent_approved: true }, home).status, 0);
    assert.equal(runLine(appendLine(section(TP, 'Phase 12'), 'trekplan', TP),
      { ts: '2026-09-23T10:05:00Z', slug: 'dark-mode-toggle', outcome: 'save' }, home).status, 0);

    const { loadStats } = await import(join(ROOT, 'scripts', 'yardstick.mjs'));
    const stats = loadStats(join(home, DATA_REL));
    const all = stats.files.flatMap((f) => f.records.map((r) => ({ file: f.name, r })));
    const approved = all.filter(({ r }) => r.event === 'brief-approved' && r.payload?.slug === 'dark-mode-toggle');
    const brief = all.filter(({ file, r }) => file === 'trekbrief-stats.jsonl' && r.intent_approved === true && r.slug === 'dark-mode-toggle');
    const plan = all.filter(({ file, r }) => file === 'trekplan-stats.jsonl' && r.slug === 'dark-mode-toggle');
    assert.equal(approved.length, 1, 'brief-approved with slug');
    assert.equal(brief.length, 1, 'trekbrief record with intent_approved: true');
    assert.equal(plan.length, 1, 'trekplan record with the same slug');
  } finally {
    rmSync(home, { recursive: true, force: true });
    rmSync(proj, { recursive: true, force: true });
  }
});

test('M6: stats-append and intent-approval resolve the same data dir as the yardstick', async () => {
  const { resolveStatsDir } = await import(join(ROOT, 'lib', 'stats', 'stats-append.mjs'));
  const { resolveApprovalDataDir } = await import(join(ROOT, 'lib', 'validators', 'intent-approval.mjs'));
  const env = { HOME: '/home/someone', CLAUDE_PLUGIN_DATA: '' };
  assert.equal(resolveStatsDir(env), join('/home/someone', DATA_REL));
  assert.equal(resolveApprovalDataDir(env), resolveStatsDir(env));
  assert.equal(resolveStatsDir({ HOME: '/h', CLAUDE_PLUGIN_DATA: '/x/y' }), '/x/y');
});