// tests/lib/plan-scope-sweep.test.mjs
// K6 — the sweep for files the plan does not name.
// `plan-scope-sweep.mjs --plan <plan.md> --base <ref>`: changed files since the
// merge base, minus every step's `Files:` / `Test first:` file / manifest
// `expected_paths`, minus a named process-file list, must be empty.
// 0 = nothing outside the plan, 1 = deviation (listed), 2 = could not run.

import { test } from 'node:test';
import { strict as assert } from 'node:assert';
import { spawnSync, execFileSync } from 'node:child_process';
import { mkdtempSync, mkdirSync, writeFileSync, rmSync } from 'node:fs';
import { join, dirname } from 'node:path';
import { tmpdir } from 'node:os';
import { fileURLToPath } from 'node:url';
import { plannedPaths, PROCESS_FILES } from '../../lib/verification/plan-scope-sweep.mjs';
import { buildPlan } from '../helpers/plan-v18-builder.mjs';

const HERE = dirname(fileURLToPath(import.meta.url));
const SWEEP = join(HERE, '..', '..', 'lib', 'verification', 'plan-scope-sweep.mjs');

const git = (dir, ...args) => execFileSync('git', ['-C', dir, ...args], { encoding: 'utf-8', stdio: 'pipe' });

function repo() {
  const dir = mkdtempSync(join(tmpdir(), 'scope-sweep-'));
  git(dir, 'init', '-q', '-b', 'main');
  git(dir, 'config', 'user.email', 't@example.invalid');
  git(dir, 'config', 'user.name', 't');
  git(dir, 'config', 'commit.gpgsign', 'false');
  writeFileSync(join(dir, 'README.md'), '# r\n');
  git(dir, 'add', 'README.md');
  git(dir, 'commit', '-q', '-m', 'base');
  mkdirSync(join(dir, '.claude', 'projects', 'p1'), { recursive: true });
  writeFileSync(join(dir, '.claude', 'projects', 'p1', 'plan.md'), buildPlan());
  mkdirSync(join(dir, 'src'));
  mkdirSync(join(dir, 'tests'));
  return dir;
}

function put(dir, rel, body = 'x\n') {
  mkdirSync(dirname(join(dir, rel)), { recursive: true });
  writeFileSync(join(dir, rel), body);
}

function run(dir, extra = []) {
  const r = spawnSync('node', [SWEEP, '--plan', '.claude/projects/p1/plan.md', '--base', 'main', ...extra],
    { cwd: dir, encoding: 'utf-8' });
  let json = null;
  try { json = JSON.parse(r.stdout); } catch { /* asserted by caller */ }
  return { code: r.status, json, out: r.stdout, err: r.stderr };
}

// ---- the test that failed first ----
test('K6: one changed file outside the plan → 1, and it is listed', () => {
  const dir = repo();
  try {
    git(dir, 'checkout', '-q', '-b', 'work');
    put(dir, 'src/mod1.mjs');
    put(dir, 'tests/mod1.test.mjs');
    put(dir, 'src/unplanned.mjs');
    git(dir, 'add', 'src', 'tests', '.claude');
    git(dir, 'commit', '-q', '-m', 'work');
    const r = run(dir);
    assert.equal(r.code, 1, r.out + r.err);
    assert.deepEqual(r.json.outside, ['src/unplanned.mjs']);
  } finally { rmSync(dir, { recursive: true, force: true }); }
});

test('K6: only planned files and process files changed → 0', () => {
  const dir = repo();
  try {
    git(dir, 'checkout', '-q', '-b', 'work');
    put(dir, 'src/mod1.mjs');
    put(dir, 'tests/mod2.test.mjs');
    put(dir, '.claude/projects/p1/progress.json', '{}');
    git(dir, 'add', 'src', 'tests', '.claude');
    git(dir, 'commit', '-q', '-m', 'work');
    const r = run(dir);
    assert.equal(r.code, 0, r.out + r.err);
    assert.deepEqual(r.json.outside, []);
  } finally { rmSync(dir, { recursive: true, force: true }); }
});

test('K6: uncommitted and untracked changes count too', () => {
  const dir = repo();
  try {
    git(dir, 'add', '.claude');
    git(dir, 'commit', '-q', '-m', 'plan');
    put(dir, 'README.md', '# changed\n');
    put(dir, 'stray.txt');
    const r = run(dir);
    assert.equal(r.code, 1);
    assert.deepEqual(r.json.outside, ['README.md', 'stray.txt']);
  } finally { rmSync(dir, { recursive: true, force: true }); }
});

test('K6: --process names extra process files; a deviation is allowed once the plan names the file', () => {
  const dir = repo();
  try {
    put(dir, 'CHANGELOG.md');
    assert.equal(run(dir).code, 1);
    assert.equal(run(dir, ['--process', 'CHANGELOG.md']).code, 0);
    const plan = buildPlan().replace('- **Files:** `src/mod1.mjs`', '- **Files:** `src/mod1.mjs`, `CHANGELOG.md`');
    writeFileSync(join(dir, '.claude', 'projects', 'p1', 'plan.md'), plan);
    assert.equal(run(dir).code, 0);
  } finally { rmSync(dir, { recursive: true, force: true }); }
});

test('K6: a bad ref, a missing plan, or a plan without steps → 2', () => {
  const dir = repo();
  try {
    assert.equal(run(dir, ['--base', 'no-such-ref']).code, 2);
    const r = spawnSync('node', [SWEEP, '--plan', 'missing.md', '--base', 'main'], { cwd: dir, encoding: 'utf-8' });
    assert.equal(r.status, 2);
    writeFileSync(join(dir, '.claude', 'projects', 'p1', 'plan.md'), '# no steps\n');
    assert.equal(run(dir).code, 2);
  } finally { rmSync(dir, { recursive: true, force: true }); }
});

test('plannedPaths collects Files, Test first files and manifest expected_paths', () => {
  const p = plannedPaths(buildPlan());
  for (const f of ['src/mod1.mjs', 'tests/mod1.test.mjs', 'src/mod2.mjs', 'tests/mod2.test.mjs']) {
    assert.ok(p.includes(f), `${f} missing from ${p.join(',')}`);
  }
  assert.ok(PROCESS_FILES.length > 0);
});

// ---- review findings (independent code review, 06.10) ----
test('K6: renames list both paths, deletions count, non-ASCII and spaced names match when planned', () => {
  const dir = repo();
  try {
    put(dir, 'src/old name.mjs');
    put(dir, 'src/gone.mjs');
    git(dir, 'add', 'src');
    git(dir, 'commit', '-q', '-m', 'more');
    git(dir, 'checkout', '-q', '-b', 'work');
    git(dir, 'mv', 'src/old name.mjs', 'src/prøve fil.mjs');
    git(dir, 'rm', '-q', 'src/gone.mjs');
    git(dir, 'commit', '-q', '-m', 'work');
    const r = run(dir);
    assert.equal(r.code, 1);
    assert.deepEqual(r.json.outside, ['src/gone.mjs', 'src/old name.mjs', 'src/prøve fil.mjs']);
    const plan = buildPlan().replace('- **Files:** `src/mod1.mjs`',
      '- **Files:** `src/mod1.mjs`, `src/old name.mjs`, `src/prøve fil.mjs`, `src/gone.mjs`');
    writeFileSync(join(dir, '.claude', 'projects', 'p1', 'plan.md'), plan);
    const ok = run(dir);
    assert.equal(ok.code, 0, ok.out);
  } finally { rmSync(dir, { recursive: true, force: true }); }
});

test('K6: a glob with no fixed directory (`**/*`) plans nothing and is reported as ignored', () => {
  const dir = repo();
  try {
    put(dir, 'src/anything.mjs');
    const plan = buildPlan().replace('- **Files:** `src/mod1.mjs`', '- **Files:** `src/mod1.mjs`, `**/*`');
    writeFileSync(join(dir, '.claude', 'projects', 'p1', 'plan.md'), plan);
    const r = run(dir);
    assert.equal(r.code, 1);
    assert.deepEqual(r.json.ignored, ['**/*']);
    assert.ok(r.json.outside.includes('src/anything.mjs'));
    const scoped = buildPlan().replace('- **Files:** `src/mod1.mjs`', '- **Files:** `src/**`');
    writeFileSync(join(dir, '.claude', 'projects', 'p1', 'plan.md'), scoped);
    assert.equal(run(dir).code, 0, 'a glob under a fixed directory still plans');
  } finally { rmSync(dir, { recursive: true, force: true }); }
});

test('K6: a flag without its value, or a directory as the plan → 2, never a crash', () => {
  const dir = repo();
  try {
    for (const extra of [['--process'], ['--repo']]) {
      const r = run(dir, extra);
      assert.equal(r.code, 2, `${extra.join(' ')}: ${r.err}`);
      assert.ok(r.json);
    }
    const r = spawnSync('node', [SWEEP, '--plan', 'src', '--base', 'main'], { cwd: dir, encoding: 'utf-8' });
    assert.equal(r.status, 2, r.stderr);
  } finally { rmSync(dir, { recursive: true, force: true }); }
});