// allow-test-rule: pending-migration-to-typed-ir [#2974]
// Tracked in #2974 for migration to typed-IR assertions per CONTRIBUTING.md
// "Prohibited: Raw Text Matching on Test Outputs". Per-file review may
// reclassify some entries as source-text-is-the-product during migration.

/**
 * Regression test for #2698: CRLF line endings break agent-block strip regexes
 *
 * The legacy `gsd-update-check` hook migration in bin/install.js uses two
 * separate .replace() calls:
 *   1. LF-only regex: /\n# GSD Hooks\n\[\[hooks\]\]\nevent = ...\n/
 *   2. CRLF-only regex: /\r\n# GSD Hooks\r\n\[\[hooks\]\]\r\nevent = ...\r\n/
 *
 * These patterns fail when config.toml has mixed line endings — e.g. the
 * "# GSD Hooks" header uses LF but the body uses CRLF, or vice versa. This
 * can happen when the file is created cross-platform (Windows/Linux), when
 * editors convert only part of the file, or when a previous GSD version wrote
 * the block with different EOL than the file's dominant EOL.
 *
 * Fix: consolidate to a single \r?\n-aware regex that handles LF, CRLF, and
 * any mix in a single pass, making the migration robust regardless of the
 * platform the file was last written on.
 *
 * Test approach: write a `.codex/config.toml` with a stale gsd-update-check
 * block that uses mixed line endings (header in LF, body in CRLF), then run
 * install() and assert the stale block is gone.
 *
 * Note: The local Codex install writes to `.codex/` in the current directory.
 * Tests `process.chdir(tmpDir)` and write fixtures to `tmpDir/.codex/`.
 */

'use strict';

process.env.GSD_TEST_MODE = '1';

const { describe, test, before, beforeEach, afterEach } = require('node:test');
const assert = require('node:assert/strict');
const fs = require('fs');
const path = require('path');
const os = require('os');
const { execFileSync } = require('child_process');

const INSTALL_SRC = path.join(__dirname, '..', 'bin', 'install.js');
const BUILD_SCRIPT = path.join(__dirname, '..', 'scripts', 'build-hooks.js');
const { install, GSD_CODEX_MARKER } = require(INSTALL_SRC);

// Ensure hooks/dist/ is populated before install tests
before(() => {
  execFileSync(process.execPath, [BUILD_SCRIPT], {
    encoding: 'utf-8',
    stdio: 'pipe',
  });
});

describe('#2698: CRLF stale gsd-update-check block is removed on Codex reinstall', () => {
  let tmpDir;

  beforeEach(() => {
    tmpDir = fs.mkdtempSync(path.join(os.tmpdir(), 'gsd-crlf-install-2698-'));
  });

  afterEach(() => {
    fs.rmSync(tmpDir, { recursive: true, force: true });
  });

  // Helper: pre-populate .codex/config.toml with a GSD marker + stale hooks block
  // using the given line ending for the stale hooks block header, and a potentially
  // different EOL for the hooks body. This exercises the cross-platform mixed scenario.
  function writeCodexConfigWithStaleHooks(dir, headerEol, bodyEol) {
    // Build the stale block with header EOL for the "# GSD Hooks" line, but body EOL
    // for the content lines (simulates a file edited by two different platforms).
    const staleBlock = [
      '# GSD Hooks',           // line that starts the stale section
      '[[hooks]]',
      'event = "SessionStart"',
      'command = "node /old/path/gsd-update-check.js"',
    ].join(bodyEol);

    // Put the stale block in user content BEFORE the GSD marker. The GSD marker area
    // will be regenerated by mergeCodexConfig during install(); the stale block in
    // the user area is what the hooks migration must remove.
    const content = [
      '[features]',
      'codex_hooks = true',
      '',
    ].join(headerEol) + headerEol + staleBlock + headerEol + headerEol + GSD_CODEX_MARKER + headerEol;

    const codexDir = path.join(dir, '.codex');
    fs.mkdirSync(codexDir, { recursive: true });
    const configPath = path.join(codexDir, 'config.toml');
    fs.writeFileSync(configPath, content, 'utf-8');
    return configPath;
  }

  test('LF config.toml: stale gsd-update-check block removed on reinstall', (t) => {
    const origCwd = process.cwd();
    t.after(() => { process.chdir(origCwd); });
    process.chdir(tmpDir);

    writeCodexConfigWithStaleHooks(tmpDir, '\n', '\n');
    install(false, 'codex');

    const configPath = path.join(tmpDir, '.codex', 'config.toml');
    const content = fs.readFileSync(configPath, 'utf-8');

    assert.ok(
      !content.includes('gsd-update-check'),
      'Stale gsd-update-check entry must be removed from LF config.toml (#2698)'
    );
    assert.ok(
      content.includes('gsd-check-update'),
      'New gsd-check-update hook must appear after reinstall'
    );
  });

  test('CRLF config.toml: stale gsd-update-check block removed on reinstall', (t) => {
    const origCwd = process.cwd();
    t.after(() => { process.chdir(origCwd); });
    process.chdir(tmpDir);

    writeCodexConfigWithStaleHooks(tmpDir, '\r\n', '\r\n');
    install(false, 'codex');

    const configPath = path.join(tmpDir, '.codex', 'config.toml');
    const content = fs.readFileSync(configPath, 'utf-8');

    assert.ok(
      !content.includes('gsd-update-check'),
      'Stale gsd-update-check entry must be removed from CRLF config.toml (#2698)'
    );
    assert.ok(
      content.includes('gsd-check-update'),
      'New gsd-check-update hook must appear after reinstall'
    );
  });

  test('mixed-EOL config.toml: stale block with LF header but CRLF body removed on reinstall', (t) => {
    // This is the primary failure case: header line uses LF but the body uses CRLF.
    // The old LF-only regex requires all-\n separators; the old CRLF-only regex requires
    // all-\r\n separators. Neither matches a block with mixed endings, so the stale
    // block survives reinstall with the old code (#2698).
    const origCwd = process.cwd();
    t.after(() => { process.chdir(origCwd); });
    process.chdir(tmpDir);

    // headerEol='\n' (file dominant), bodyEol='\r\n' (hook block from another platform)
    writeCodexConfigWithStaleHooks(tmpDir, '\n', '\r\n');
    install(false, 'codex');

    const configPath = path.join(tmpDir, '.codex', 'config.toml');
    const content = fs.readFileSync(configPath, 'utf-8');

    assert.ok(
      !content.includes('gsd-update-check'),
      [
        'Stale gsd-update-check block with mixed LF/CRLF endings must be removed (#2698).',
        'Old code used two separate LF-only and CRLF-only regexes; neither matched mixed content.',
        'Fix consolidates to a single \\r?\\n-aware regex.',
      ].join(' ')
    );
  });
});