import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:kooltap/l10n/app_localizations.dart';
import 'package:kooltap/models/bar_tab.dart';
import 'package:kooltap/models/tab_item.dart';
import 'package:kooltap/services/admin_pin_service.dart';
import 'package:kooltap/services/bar_tab_service.dart';
import 'package:kooltap/services/pin_lock_service.dart';
import 'package:kooltap/viewmodels/admin_pin_view_model.dart';
import 'package:kooltap/viewmodels/bar_screen_view_model.dart';
import 'package:kooltap/views/dialogs/edit_tab_dialog.dart';
import 'package:mocktail/mocktail.dart';
import 'package:provider/provider.dart';

class MockBarTabService extends Mock implements BarTabService {}

class MockAdminPinService extends Mock implements AdminPinService {}

BarTab _tab({required bool withItems}) {
  return BarTab(
    id: 'tab-1',
    customerName: 'John',
    openedAt: DateTime(2026),
    items: [
      if (withItems)
        const TabItem(
          id: 'item-1',
          tabId: 'tab-1',
          productId: 'beer',
          productName: 'Beer',
          quantity: 2,
          unitPriceInCents: 250,
        ),
    ],
  );
}

void main() {
  late MockBarTabService barTabService;
  late MockAdminPinService adminPinService;
  late AdminPinViewModel adminPinViewModel;

  setUp(() {
    barTabService = MockBarTabService();
    adminPinService = MockAdminPinService();
    adminPinViewModel = AdminPinViewModel(adminPinService: adminPinService);

    when(() => barTabService.deleteTab(any())).thenAnswer((_) async {});
    when(() => adminPinService.hasPin()).thenAnswer((_) async => true);
    when(() => adminPinService.verifyPin('1234')).thenAnswer((_) async => true);
    when(
      () => adminPinService.verifyPin('0000'),
    ).thenAnswer((_) async => false);
  });

  Future<void> openDialog(WidgetTester tester, BarTab tab) async {
    await adminPinViewModel.load();

    await tester.pumpWidget(
      MultiProvider(
        providers: [
          ChangeNotifierProvider<BarScreenViewModel>(
            create: (_) => BarScreenViewModel(barTabService: barTabService),
          ),
          ChangeNotifierProvider<AdminPinViewModel>.value(
            value: adminPinViewModel,
          ),
        ],
        child: MaterialApp(
          locale: const Locale('en'),
          localizationsDelegates: AppLocalizations.localizationsDelegates,
          supportedLocales: AppLocalizations.supportedLocales,
          home: Builder(
            builder: (context) => Scaffold(
              body: ElevatedButton(
                onPressed: () => confirmDeleteTab(context, tab),
                child: const Text('Open'),
              ),
            ),
          ),
        ),
      ),
    );

    await tester.tap(find.text('Open'));
    await tester.pumpAndSettle();
  }

  Future<void> confirmWithPin(WidgetTester tester, String? pin) async {
    if (pin != null) await tester.enterText(find.byType(TextField), pin);
    await tester.tap(find.widgetWithText(FilledButton, 'Delete'));
    await tester.pumpAndSettle();
  }

  testWidgets('deletes an empty tab without asking for a PIN', (tester) async {
    await openDialog(tester, _tab(withItems: false));

    expect(find.byType(TextField), findsNothing);
    await confirmWithPin(tester, null);

    verify(() => barTabService.deleteTab('tab-1')).called(1);
  });

  testWidgets('deletes a tab with drinks after the right admin PIN', (
    tester,
  ) async {
    await openDialog(tester, _tab(withItems: true));
    await confirmWithPin(tester, '1234');

    verify(() => barTabService.deleteTab('tab-1')).called(1);
    expect(adminPinViewModel.isUnlocked, false);
  });

  testWidgets('keeps a tab with drinks after a wrong admin PIN', (
    tester,
  ) async {
    await openDialog(tester, _tab(withItems: true));
    await confirmWithPin(tester, '0000');

    verifyNever(() => barTabService.deleteTab(any()));
  });

  testWidgets('keeps a tab with drinks while the PIN is locked out', (
    tester,
  ) async {
    when(
      () => adminPinService.verifyPin(any()),
    ).thenThrow(const PinLockedOutException(Duration(minutes: 1)));

    await openDialog(tester, _tab(withItems: true));
    await confirmWithPin(tester, '1234');

    verifyNever(() => barTabService.deleteTab(any()));
  });

  testWidgets('cancelling deletes nothing', (tester) async {
    await openDialog(tester, _tab(withItems: true));
    await tester.tap(find.text('Cancel'));
    await tester.pumpAndSettle();

    verifyNever(() => barTabService.deleteTab(any()));
  });

  testWidgets('does not ask for a PIN when no admin PIN is set', (
    tester,
  ) async {
    when(() => adminPinService.hasPin()).thenAnswer((_) async => false);

    await openDialog(tester, _tab(withItems: true));

    expect(find.byType(TextField), findsNothing);
    await confirmWithPin(tester, null);

    verify(() => barTabService.deleteTab('tab-1')).called(1);
  });
}