import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:provider/provider.dart';

import 'package:fuel_tax_tracker/services/app_state.dart';
import 'package:fuel_tax_tracker/widgets/ad_free_upsell_dialog.dart';

/// Covers the "remove ads for a year" upsell shown right after a user
/// watches the app's one ad placement — see `AppState.syncNow`'s
/// `onAdWatched` hook, wired up in main.dart. Tested here as a standalone
/// dialog function, matching backup_reminder_test.dart's convention.
void main() {
  Future<void> openDialog(WidgetTester tester, AppState appState) async {
    await tester.pumpWidget(
      ChangeNotifierProvider.value(
        value: appState,
        child: MaterialApp(
          home: Builder(
            builder: (context) => ElevatedButton(
              onPressed: () => showAdFreeUpsellDialog(context),
              child: const Text('open'),
            ),
          ),
        ),
      ),
    );
    await tester.tap(find.text('open'));
    await tester.pumpAndSettle();
  }

  testWidgets('shows the pitch with both actions', (tester) async {
    await openDialog(tester, AppState());

    expect(find.text('Tired of Ads?'), findsOneWidget);
    expect(find.text('Not Now'), findsOneWidget);
    expect(find.text('Remove Ads'), findsOneWidget);
  });

  testWidgets('falls back to generic copy when no price is loaded yet', (tester) async {
    await openDialog(tester, AppState());

    expect(find.textContaining('a single one-time purchase'), findsOneWidget);
    expect(find.textContaining('\$'), findsNothing);
  });

  testWidgets('Not Now closes the dialog without navigating anywhere', (tester) async {
    await openDialog(tester, AppState());

    await tester.tap(find.text('Not Now'));
    await tester.pumpAndSettle();

    expect(find.text('Tired of Ads?'), findsNothing);
  });

  testWidgets('Remove Ads closes the dialog and starts the purchase flow', (tester) async {
    final appState = AppState();
    await openDialog(tester, appState);

    await tester.tap(find.text('Remove Ads'));
    await tester.pumpAndSettle();

    expect(find.text('Tired of Ads?'), findsNothing, reason: 'dialog closed');
    // buyAdFreeYear() delegates to PurchaseService, which — with no real
    // store connection in tests — surfaces its failure through
    // AppState.purchaseError rather than throwing, so tapping through is
    // enough to confirm the button actually invoked it without crashing.
    expect(appState.purchaseError, isNotNull);
  });
}