// Tier 1 contract golden tests (see docs/adr/0002-two-tier-runtime-contract.md).
//
// These lock the four-verb CLI I/O envelope at the process boundary so the
// upcoming TypeScript / runtime-core refactor cannot silently change what an
// agent (or the skill/CLI/MCP transports) observes on stdout:
//   --build   -> { ok: true, db }
//   --search  -> JSON array
//   --query   -> pretty-printed JSON result, or { error, stack } + exit 1 on throw
//   --attune  -> pretty-printed JSON result, or { error, stack } + exit 1 on throw
//
// The sandbox contract (query cannot call attune helpers, attune exposes only
// remember/forget, etc.) is covered separately in runtime.test.mjs; this file is
// only about the transport envelope.

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

const repoRoot = resolve(dirname(fileURLToPath(import.meta.url)), '..');

function runRuntime(args, { home }) {
  return spawnSync(process.execPath, ['scripts/runtime.mjs', ...args], {
    cwd: repoRoot,
    env: { ...process.env, HOME: home },
    encoding: 'utf8',
  });
}

function tempHome() {
  const home = mkdtempSync(join(tmpdir(), 'obelisk-cli-envelope-'));
  mkdirSync(join(home, '.claude'), { recursive: true });
  return home;
}

test('--build emits { ok: true, db } pointing at the resolved db path', () => {
  const home = tempHome();
  const result = runRuntime(['--build'], { home });

  assert.equal(result.status, 0, result.stderr || result.stdout);
  const payload = JSON.parse(result.stdout);
  assert.equal(payload.ok, true);
  assert.equal(typeof payload.db, 'string');
  assert.ok(
    payload.db.endsWith(join('.obelisk', 'obelisk.sqlite')),
    `db path should resolve under HOME/.obelisk, got ${payload.db}`,
  );
});

test('--search emits a JSON array envelope', () => {
  const home = tempHome();
  const result = runRuntime(['--search', 'zzznomatchzzz'], { home });

  assert.equal(result.status, 0, result.stderr || result.stdout);
  const payload = JSON.parse(result.stdout);
  assert.ok(Array.isArray(payload), 'search must return a JSON array');
});

test('--query returns a pretty-printed JSON result on success', () => {
  const home = tempHome();
  const scriptPath = join(home, 'ok.mjs');
  writeFileSync(scriptPath, 'return { answer: 42 };');

  const result = runRuntime(['--query', scriptPath], { home });

  assert.equal(result.status, 0, result.stderr || result.stdout);
  assert.deepEqual(JSON.parse(result.stdout), { answer: 42 });
  // Pretty-printed with two-space indentation (JSON.stringify(r, null, 2)).
  assert.match(result.stdout, /\n {2}"answer": 42/);
});

test('--query surfaces a throw as { error, stack } and exits 1', () => {
  const home = tempHome();
  const scriptPath = join(home, 'boom.mjs');
  writeFileSync(scriptPath, "throw new Error('boom-envelope');");

  const result = runRuntime(['--query', scriptPath], { home });

  assert.equal(result.status, 1);
  const payload = JSON.parse(result.stdout);
  assert.equal(payload.error, 'boom-envelope');
  assert.equal(typeof payload.stack, 'string');
});

test('--attune surfaces a throw as { error, stack } and exits 1', () => {
  const home = tempHome();
  const scriptPath = join(home, 'attune-boom.mjs');
  writeFileSync(scriptPath, "throw new Error('attune-envelope');");

  const result = runRuntime(['--attune', scriptPath], { home });

  assert.equal(result.status, 1);
  const payload = JSON.parse(result.stdout);
  assert.equal(payload.error, 'attune-envelope');
  assert.equal(typeof payload.stack, 'string');
});

test('unknown verb prints usage to stderr and exits non-zero', () => {
  const home = tempHome();
  const result = runRuntime(['--nonsense'], { home });

  assert.notEqual(result.status, 0);
  assert.equal(result.stdout, '');
  assert.match(result.stderr, /Usage:/);
  assert.match(result.stderr, /--build/);
});

test('--search shares the { error, stack } envelope instead of crashing to stderr', () => {
  // A hyphenated term is FTS5 syntax and makes search() throw. The uniform
  // error envelope (see docs/adr/0002) requires this surface as { error, stack }
  // on stdout with exit 1 — the same shape as --query/--attune — not a raw crash.
  const home = tempHome();
  const result = runRuntime(['--search', 'foo-bar'], { home });

  assert.equal(result.status, 1);
  const payload = JSON.parse(result.stdout);
  assert.equal(typeof payload.error, 'string');
  assert.equal(typeof payload.stack, 'string');
});