// tests/hooks/test-lock-green.test.mjs
// The test lock's green mark (operator decision 2026-10-08, voyage-lekerepo
// trial point 7). The stop guard blocked Stop three times while the executor
// waited for the controller in the background, though the step's test was
// already green. Now:
//   - `test-lock.mjs green --cmd "<Verify>"` RUNS the step's test command and
//     marks the lock "seen green" only on exit 0 (a command proves it, never a
//     word);
//   - the stop guard lets a green-marked lock stop; the write guard still
//     refuses the locked files — the lock still protects the test;
//   - `test-lock.mjs pending` clears the mark when a fix round starts.

import { test } from 'node:test';
import { strict as assert } from 'node:assert';
import { spawnSync } from 'node:child_process';
import { writeFileSync, mkdirSync, readFileSync } from 'node:fs';
import { join } from 'node:path';
import { runHook } from '../helpers/hook-helper.mjs';
import { ROOT, makeRepo, parseJsonOut } from './guard-helpers.mjs';

const CLI = join(ROOT, 'lib', 'util', 'test-lock.mjs');
const STOP = join(ROOT, 'hooks', 'scripts', 'stop-test-lock.mjs');
const PRE_WRITE = join(ROOT, 'hooks', 'scripts', 'pre-write-executor.mjs');
const SESS = `sess-green-${process.pid}-${Date.now()}`;
const CMD = 'node --test tests/step.test.mjs';

function cli(repo, args) {
  const r = spawnSync(process.execPath, [CLI, ...args], { cwd: repo, encoding: 'utf8', env: { ...process.env, CLAUDE_CODE_SESSION_ID: SESS } });
  return { code: r.status, stdout: r.stdout, stderr: r.stderr };
}

function lockedRepo(testBody) {
  const repo = makeRepo('main');
  mkdirSync(join(repo, 'tests'), { recursive: true });
  writeFileSync(join(repo, 'tests', 'step.test.mjs'), [
    "import { test } from 'node:test';",
    "import { strict as assert } from 'node:assert';",
    `test('step', () => { ${testBody} });`,
    '',
  ].join('\n'));
  assert.equal(cli(repo, ['lock', '--files', 'tests/step.test.mjs', '--step', '3', '--cmd', CMD]).code, 0);
  return repo;
}
const stop = (repo) => ({ hook_event_name: 'Stop', session_id: SESS, cwd: repo, stop_hook_active: false });
const edit = (file_path) => ({ hook_event_name: 'PreToolUse', tool_name: 'Edit', tool_input: { file_path, old_string: 'x', new_string: 'z' } });

test('green: the step\'s test passes -> the lock is marked green, Stop goes through, the test file stays locked', async () => {
  const repo = lockedRepo('assert.equal(1, 1);');
  const g = cli(repo, ['green', '--cmd', CMD]);
  assert.equal(g.code, 0, g.stderr);
  assert.ok(JSON.parse(cli(repo, ['status']).stdout).green_at, 'status shows green_at');
  assert.equal(parseJsonOut((await runHook(STOP, stop(repo))).stdout), null, 'a green lock does not block Stop');
  const w = await runHook(PRE_WRITE, edit(join(repo, 'tests', 'step.test.mjs')));
  assert.equal(w.code, 2, 'the test file is still locked against edits');
});

test('green: the test fails -> exit 1, no mark, Stop is still refused', async () => {
  const repo = lockedRepo('assert.equal(1, 2);');
  assert.equal(cli(repo, ['green', '--cmd', CMD]).code, 1);
  assert.equal(JSON.parse(cli(repo, ['status']).stdout).green_at, null);
  assert.equal(parseJsonOut((await runHook(STOP, stop(repo))).stdout)?.decision, 'block');
});

test('green: a --cmd that is not the stored test command is never run -> exit 2, no mark', () => {
  const repo = lockedRepo('assert.equal(1, 1);');
  const g = cli(repo, ['green', '--cmd', 'echo ok']);
  assert.equal(g.code, 2, g.stderr);
  assert.equal(JSON.parse(cli(repo, ['status']).stdout).green_at, null);
});

test('green: no lock to mark -> exit 1', () => {
  const repo = makeRepo('main');
  assert.equal(cli(repo, ['green', '--cmd', CMD]).code, 1);
});

test('pending: a fix round clears the mark, and Stop is refused again', async () => {
  const repo = lockedRepo('assert.equal(1, 1);');
  assert.equal(cli(repo, ['green', '--cmd', CMD]).code, 0);
  assert.equal(cli(repo, ['pending']).code, 0);
  assert.equal(JSON.parse(cli(repo, ['status']).stdout).green_at, null);
  assert.equal(parseJsonOut((await runHook(STOP, stop(repo))).stdout)?.decision, 'block');
});

test('re-lock of the same step starts without a mark', () => {
  const repo = lockedRepo('assert.equal(1, 1);');
  assert.equal(cli(repo, ['green', '--cmd', CMD]).code, 0);
  assert.equal(cli(repo, ['lock', '--files', 'tests/step.test.mjs', '--step', '3', '--cmd', CMD]).code, 0);
  assert.equal(JSON.parse(cli(repo, ['status']).stdout).green_at, null);
});

test('trekexecute: D1 marks the lock green through the command, a fix round marks it pending', () => {
  const md = readFileSync(join(ROOT, 'commands', 'trekexecute.md'), 'utf8');
  assert.match(md, /test-lock\.mjs green\n/);
  assert.match(md, /test-lock\.mjs lock --files \{test files\} --step \{N\} --cmd "\{Verify command\}"/);
  assert.match(md, /test-lock\.mjs pending/);
});