import 'dart:io';

import 'package:flutter_test/flutter_test.dart';

/// S1 (Tier 1 visual fidelity): the prototype (`t4`) never draws a global
/// `AppBar` — every root owns its own 56px title row instead (see
/// `PluriRootHeader` and `root_header_wiring_test.dart`). `app.dart` used to
/// wrap every tab in `PluriWaveScaffold(appBar: AppBar(...))`; this is a
/// fast source-level regression guard for that removal, since the widget
/// under it (`_PaginaPrincipal`) is library-private and constructs real
/// platform-backed services, so it cannot be safely widget-tested here.
void main() {
  test('app.dart no longer constructs a global Material AppBar', () {
    final source = File('lib/app.dart').readAsStringSync();
    expect(
      source.contains('AppBar('),
      isFalse,
      reason:
          'the prototype has no global app bar — each root draws its own '
          'PluriRootHeader inside its content instead',
    );
  });

  test('the first-launch sequence runs the welcome screen, then the tutorial '
      'carousel, then the recurring what-is-new dialog, in that order', () {
    // `_PaginaPrincipal` is library-private and its
    // `_mostrarFlujoPrimerLanzamiento` constructs real platform-backed
    // services, so it cannot be safely widget-tested here (same
    // constraint as the AppBar guard above). This is a fast source-level
    // ordering guard instead: PantallaBienvenida.mostrarSiProcede must
    // run before PantallaTutorialAyuda.mostrarSiProcede, which must run
    // before the unrelated, pre-existing _mostrarOnboardingInicial() call
    // -- so the tutorial shows once on every launch sequence (fresh
    // installs AND existing installs upgrading to this version) without
    // ever racing the welcome screen or the what's-new dialog.
    final source = File('lib/app.dart').readAsStringSync();

    final indiceBienvenida = source.indexOf(
      'PantallaBienvenida.mostrarSiProcede',
    );
    final indiceTutorial = source.indexOf(
      'PantallaTutorialAyuda.mostrarSiProcede',
    );
    final indiceOnboarding = source.indexOf('_mostrarOnboardingInicial()');

    expect(
      indiceBienvenida,
      greaterThanOrEqualTo(0),
      reason: 'PantallaBienvenida.mostrarSiProcede must still be called',
    );
    expect(
      indiceTutorial,
      greaterThanOrEqualTo(0),
      reason: 'PantallaTutorialAyuda.mostrarSiProcede must be wired in',
    );
    expect(
      indiceOnboarding,
      greaterThanOrEqualTo(0),
      reason: '_mostrarOnboardingInicial() must still be called',
    );
    expect(
      indiceBienvenida,
      lessThan(indiceTutorial),
      reason: 'the welcome screen must run before the tutorial carousel',
    );
    expect(
      indiceTutorial,
      lessThan(indiceOnboarding),
      reason: 'the tutorial carousel must run before the what-is-new dialog',
    );
  });
}