import 'dart:io';

import 'package:flutter_test/flutter_test.dart';

/// ─────────────────────────────────────────────────────────────────────────
/// THE RETIRED PLATFORM IS NOT NAMED ANYWHERE
///
/// The delivery screens under `lib/xpress` are a verbatim port of a rider app
/// that belonged to a platform which has since been shut down. The port
/// brought its hostnames, its image host and its name in comments with it, and
/// those references outlived the thing they referred to.
///
/// A dead product's name in a live repo is not a cosmetic problem. It sends the
/// next reader looking for a backend that no longer answers, and it is exactly
/// the sort of string that gets pasted into a config file by somebody trying to
/// make a screen work.
///
/// ── Why the word is assembled rather than written ──
///
/// This file has to know the banned string in order to look for it, and a
/// literal here would be the very thing it forbids — the ban would fail its own
/// test. Joining two halves keeps the guard real and keeps the repo clean.
/// ─────────────────────────────────────────────────────────────────────────
void main() {
  // The retired platform's name, never spelled in one piece. See above.
  final banned = <String>[
    ['nea', 'rle'].join(),
  ];

  test('no source, test or document names the retired platform', () {
    final offenders = <String>[];

    for (final dir in const ['lib', 'test']) {
      for (final entity in Directory(dir).listSync(recursive: true)) {
        if (entity is! File) continue;
        if (!entity.path.endsWith('.dart')) continue;
        // This file is the one place the string legitimately exists, in two
        // halves — skip it rather than assemble a special case for it.
        if (entity.path.endsWith('retired_platform_test.dart')) continue;

        final text = entity.readAsStringSync().toLowerCase();
        for (final word in banned) {
          if (text.contains(word)) offenders.add(entity.path);
        }
      }
    }

    for (final doc in Directory('.').listSync()) {
      if (doc is! File || !doc.path.endsWith('.md')) continue;
      final text = doc.readAsStringSync().toLowerCase();
      for (final word in banned) {
        if (text.contains(word)) offenders.add(doc.path);
      }
    }

    expect(
      offenders,
      isEmpty,
      reason:
          'the retired platform is named in: ${offenders.join(', ')} — it was '
          'shut down, so a reference to it points at nothing and reads as a '
          'live dependency to the next person through this file',
    );
  });
}