'use strict';
process.env.GSD_TEST_MODE = '1';

const { test, describe } = require('node:test');
const assert = require('node:assert/strict');
const path = require('node:path');

const ROOT = path.join(__dirname, '..');
const { checkLatestVersion, CHECK_REASON, PACKAGE_NAME } = require(
  path.join(ROOT, 'gsd-core', 'bin', 'check-latest-version.cjs'),
);

// checkLatestVersion is a pure-ish function: it spawns one fixed npm
// command, validates the output, and returns { ok, version | reason }.
// The package name is HARDCODED — not a free choice for the caller.
// Tests use a pluggable spawn so no real npm process is invoked.

describe('Bug #2992: deterministic latest-version check', () => {
  test('PACKAGE_NAME is the constant @opengsd/gsd-core (no callers can override)', () => {
    assert.equal(PACKAGE_NAME, '@opengsd/gsd-core');
  });

  test('CHECK_REASON enum exposes the documented codes', () => {
    assert.deepEqual(
      Object.keys(CHECK_REASON).sort(),
      ['FAIL_INVALID_OUTPUT', 'FAIL_NPM_FAILED', 'OK'].sort(),
    );
  });

  test('returns { ok: true, version } when npm prints a valid semver', () => {
    const fakeSpawn = () => ({ status: 0, stdout: '1.39.1\n', stderr: '' });
    const r = checkLatestVersion({ spawn: fakeSpawn });
    assert.deepEqual(r, { ok: true, version: '1.39.1', reason: CHECK_REASON.OK });
  });
});

describe('Bug #2992: error paths', () => {
  const { checkLatestVersion, CHECK_REASON } = require(require('node:path').join(__dirname, '..', 'gsd-core', 'bin', 'check-latest-version.cjs'));

  test('FAIL_NPM_FAILED when npm exits non-zero (e.g. offline, 404)', () => {
    const r = checkLatestVersion({
      spawn: () => ({ status: 1, stdout: '', stderr: 'npm ERR! 404\n' }),
    });
    assert.equal(r.ok, false);
    assert.equal(r.reason, CHECK_REASON.FAIL_NPM_FAILED);
    assert.equal(r.detail, 'npm ERR! 404',
      'detail should be the trimmed stderr when npm reports a real error');
  });

  // #2993 CR: distinguish timeout from genuine npm failure in `detail`.
  // spawnSync sets status=null and signal='SIGTERM' on timeout; stderr is
  // typically empty. Without the signal-first branch, both shape as
  // 'npm exited non-zero' and the operator cannot tell timeout from failure.
  test('FAIL_NPM_FAILED detail names the signal when spawn times out', () => {
    const r = checkLatestVersion({
      spawn: () => ({ status: null, signal: 'SIGTERM', stdout: '', stderr: '' }),
    });
    assert.equal(r.ok, false);
    assert.equal(r.reason, CHECK_REASON.FAIL_NPM_FAILED);
    assert.equal(r.detail, 'npm timed out (signal: SIGTERM)',
      'detail should explicitly name the signal when status is null and signal is set');
  });

  test('FAIL_NPM_FAILED detail falls back to generic when neither stderr nor signal is present', () => {
    const r = checkLatestVersion({
      spawn: () => ({ status: 1, stdout: '', stderr: '' }),
    });
    assert.equal(r.detail, 'npm exited non-zero');
  });

  test('FAIL_INVALID_OUTPUT when npm prints something that is not a semver', () => {
    // E.g. if a future npm version changes the output format, or if the
    // network returns an HTML error page captured as stdout.
    const r = checkLatestVersion({
      spawn: () => ({ status: 0, stdout: '<html>not a version</html>\n', stderr: '' }),
    });
    assert.equal(r.ok, false);
    assert.equal(r.reason, CHECK_REASON.FAIL_INVALID_OUTPUT);
  });

  test('FAIL_INVALID_OUTPUT when stdout is empty', () => {
    const r = checkLatestVersion({
      spawn: () => ({ status: 0, stdout: '', stderr: '' }),
    });
    assert.equal(r.ok, false);
    assert.equal(r.reason, CHECK_REASON.FAIL_INVALID_OUTPUT);
  });

  test('accepts pre-release semver (e.g. 1.40.0-rc.1)', () => {
    const r = checkLatestVersion({
      spawn: () => ({ status: 0, stdout: '1.40.0-rc.1\n', stderr: '' }),
    });
    assert.deepEqual(r, { ok: true, version: '1.40.0-rc.1', reason: CHECK_REASON.OK });
  });
});

describe('Issue #815: --next dist-tag support', () => {
  const { buildViewArgs, resolveTag, ALLOWED_TAGS } = require(
    path.join(ROOT, 'gsd-core', 'bin', 'check-latest-version.cjs'),
  );

  test('ALLOWED_TAGS is the sanctioned channel allowlist (latest, next)', () => {
    assert.deepEqual([...ALLOWED_TAGS].sort(), ['latest', 'next']);
  });

  test('buildViewArgs() defaults to the bare latest spec (byte-for-byte unchanged)', () => {
    assert.deepEqual(buildViewArgs(), ['view', '@opengsd/gsd-core', 'version']);
    assert.deepEqual(buildViewArgs('latest'), ['view', '@opengsd/gsd-core', 'version']);
  });

  test('buildViewArgs("next") targets the @next dist-tag', () => {
    assert.deepEqual(buildViewArgs('next'), ['view', '@opengsd/gsd-core@next', 'version']);
  });

  test('resolveTag defaults to latest when no --tag flag', () => {
    assert.equal(resolveTag(['--json']), 'latest');
  });

  test('resolveTag reads --tag next', () => {
    assert.equal(resolveTag(['--json', '--tag', 'next']), 'next');
  });

  test('resolveTag rejects an unknown tag (typo guard)', () => {
    assert.throws(() => resolveTag(['--tag', 'nightly']), /invalid --tag 'nightly'/);
  });

  test('resolveTag rejects --tag with no value', () => {
    assert.throws(() => resolveTag(['--tag']), /invalid --tag ''/);
  });

  test('checkLatestVersion accepts an RC under the next tag', () => {
    const r = checkLatestVersion({ tag: 'next', spawn: () => ({ status: 0, stdout: '1.4.0-rc.1\n', stderr: '' }) });
    assert.deepEqual(r, { ok: true, version: '1.4.0-rc.1', reason: CHECK_REASON.OK });
  });

  test('buildViewArgs rejects a tag outside the allowlist (exported-API guard)', () => {
    assert.throws(() => buildViewArgs('nightly'), /invalid dist-tag 'nightly'/);
  });

  test('checkLatestVersion rejects an out-of-allowlist tag even with an injected spawn', () => {
    assert.throws(
      () => checkLatestVersion({ tag: 'nightly', spawn: () => ({ status: 0, stdout: '9.9.9\n', stderr: '' }) }),
      /invalid dist-tag 'nightly'/,
    );
  });

  test('resolveTag handles the --tag=next equals form', () => {
    assert.equal(resolveTag(['--json', '--tag=next']), 'next');
  });

  test('resolveTag rejects an unknown --tag=value equals form (no silent fallback)', () => {
    assert.throws(() => resolveTag(['--tag=nightly']), /invalid --tag 'nightly'/);
  });
});