import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:flutter_application_1/enums.dart';
import 'package:flutter_application_1/pages/chart_page.dart';
import 'package:flutter_application_1/pages/milestone_page.dart';
import 'package:flutter_application_1/widgets/chart_widget.dart';
import 'package:flutter_application_1/widgets/error_widget.dart';
import 'package:flutter_application_1/widgets/input_widget.dart';
import 'package:flutter_application_1/widgets/interval_widget.dart';
import 'package:flutter_application_1/widgets/milestone_timeline_widget.dart';
import 'package:flutter_application_1/widgets/result_widget.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:syncfusion_flutter_charts/charts.dart';

void main() {
  group('InputWidget Tests', () {
    testWidgets('Displays label, tooltip, and input field', (WidgetTester tester) async {
      const label = 'Test Label';
      const tooltipText = 'This is a tooltip';
      const suffixText = 'suffix';
      final controller = TextEditingController();
      final focusNode = FocusNode();

      await tester.pumpWidget(
        CupertinoApp(
          home: CupertinoPageScaffold(
            navigationBar: const CupertinoNavigationBar(
              middle: Text('Test InputWidget'),
            ),
            child: InputWidget(
              label: label,
              controller: controller,
              focusNode: focusNode,
              isValid: false,
              suffixText: suffixText,
              tooltipText: tooltipText,
            ),
          ),
        ),
      );

      expect(find.text(label), findsOneWidget);
      expect(find.text(suffixText), findsOneWidget);
      expect(find.byType(CupertinoTextField), findsOneWidget);
      expect(find.byType(Tooltip), findsOneWidget);
    });

    testWidgets('Displays validation icon correctly', (WidgetTester tester) async {
      final controller = TextEditingController();
      final focusNode = FocusNode();

      await tester.pumpWidget(
        CupertinoApp(
          home: InputWidget(
            label: 'Test Label',
            controller: controller,
            focusNode: focusNode,
            isValid: false,
            suffixText: 'suffix',
            tooltipText: 'This is a tooltip',
          ),
        ),
      );

      expect(find.byIcon(CupertinoIcons.clear_circled_solid), findsOneWidget);
      expect(find.byIcon(CupertinoIcons.check_mark_circled_solid), findsNothing);

      await tester.pumpWidget(
        CupertinoApp(
          home: InputWidget(
            label: 'Test Label',
            controller: controller,
            focusNode: focusNode,
            isValid: true,
            suffixText: 'suffix',
            tooltipText: 'This is a tooltip',
          ),
        ),
      );

      expect(find.byIcon(CupertinoIcons.check_mark_circled_solid), findsOneWidget);
      expect(find.byIcon(CupertinoIcons.clear_circled_solid), findsNothing);
    });

    testWidgets('Text input updates controller', (WidgetTester tester) async {
      final controller = TextEditingController();
      final focusNode = FocusNode();

      await tester.pumpWidget(
        CupertinoApp(
          home: InputWidget(
            label: 'Test Label',
            controller: controller,
            focusNode: focusNode,
            isValid: false,
            suffixText: 'suffix',
            tooltipText: 'This is a tooltip',
          ),
        ),
      );

      await tester.enterText(find.byType(CupertinoTextField), '12345');

      expect(controller.text, '12345');
    });
  });
  group('Interal Widget Tests', () {
    testWidgets('Initial state', (WidgetTester tester) async {
      const selectedInterval = 'jährlich';

      await tester.pumpWidget(
        MaterialApp(
          home: Scaffold(
            body: IntervalWidget(
              selectedInterval: selectedInterval,
              onChanged: (newInterval) {},
            ),
          ),
        ),
      );

      expect(find.text('Ausschüttungsintervall'), findsOneWidget);
      expect(find.text(selectedInterval), findsOneWidget);
      expect(find.byIcon(Icons.keyboard_arrow_down), findsOneWidget);
    });

    testWidgets('Tapping the button expands the dropdown', (WidgetTester tester) async {
      const selectedInterval = 'jährlich';

      await tester.pumpWidget(
        MaterialApp(
          home: Scaffold(
            body: IntervalWidget(
              selectedInterval: selectedInterval,
              onChanged: (newInterval) {
              },
            ),
          ),
        ),
      );

      await tester.tap(find.byType(ElevatedButton));
      await tester.pump();

      expect(find.byType(ListTile), findsNWidgets(2));
      expect(find.byIcon(CupertinoIcons.checkmark_alt), findsOneWidget);
    });

    testWidgets('Selecting an interval updates the state', (WidgetTester tester) async {
      const selectedInterval = 'jährlich';
      var currentInterval = selectedInterval;

      await tester.pumpWidget(
        MaterialApp(
          home: Scaffold(
            body: IntervalWidget(
              selectedInterval: selectedInterval,
              onChanged: (newInterval) {
                currentInterval = newInterval;
              },
            ),
          ),
        ),
      );

      await tester.tap(find.byType(ElevatedButton));
      await tester.pump();

      await tester.tap(find.text('monatlich'));
      await tester.pump();

      expect(currentInterval, 'monatlich');
      expect(find.byType(ListTile), findsNothing);
      expect(find.byIcon(Icons.keyboard_arrow_down), findsOneWidget);
    });
  });
  group('Chart Widget Tests', () {
    testWidgets('Displays chart correctly', (WidgetTester tester) async {
      final List<double> lowerValues = [100, 200, 300, 400];
      final List<double> upperValues = [50, 150, 250, 350];

      await tester.pumpWidget(
        MaterialApp(
          home: Scaffold(
            body: StackedColumnChart(
              lowerValues: lowerValues,
              upperValues: upperValues,
            ),
          ),
        ),
      );

      expect(find.byType(SfCartesianChart), findsOneWidget);

      expect(find.text('Einzahlungen'), findsOneWidget);
      expect(find.text('Zinsen'), findsOneWidget);

      expect(find.byType(CategoryAxis), findsOneWidget);
      expect(find.byType(NumericAxis), findsOneWidget);

      expect(find.text('Einzahlungen'), findsOneWidget);
      expect(find.text('Zinsen'), findsOneWidget);
      await tester.pumpAndSettle();
    });
  });
  group('Milestone Timeline Widget Tests', () {
    testWidgets('Milestone timeline displays correctly', (WidgetTester tester) async {
      final List<Map<String, dynamic>> milestones = [
        {'value': 100.0, 'emoji': '😊', 'text': 'First milestone'},
        {'value': 200.0, 'emoji': '😃', 'text': 'Second milestone'},
        {'value': 300.0, 'emoji': '😁', 'text': 'Third milestone'},
      ];
      const double totalInterest = 250.0;

      await tester.pumpWidget(
        CupertinoApp(
          home: Material(
            child: MilestoneTimeline(
              milestones: milestones,
              totalInterest: totalInterest,
            ),
          ),
        ),
      );

      expect(find.text('First milestone'), findsOneWidget);
      expect(find.text('Second milestone'), findsOneWidget);
      expect(find.text('Third milestone'), findsOneWidget);

      expect(find.byIcon(CupertinoIcons.check_mark_circled_solid), findsNWidgets(2));
      expect(find.byIcon(CupertinoIcons.circle_fill), findsOneWidget);
    });
  });
  group('Result Widget Tests', () {
  testWidgets('Displays result values correctly', (WidgetTester tester) async {
    const compoundInterest = '1000';
    const investedMoney = '500';
    const time = '5';
    const monthlySavingsRate = '100';
    const interestRate = '5';
    const payoutInterval = PayoutInterval.monthly;
    final List<double> investedMoneyList = [100, 200, 300, 400, 500];
    final List<double> compoundInterestList = [100, 200, 300, 400, 1000];

    await tester.pumpWidget(
      MaterialApp(
        home: Material(
          child: ResultWidget(
            compoundInterest: compoundInterest,
            investedMoney: investedMoney,
            time: time,
            monthlySavingsRate: monthlySavingsRate,
            interestRate: interestRate,
            payoutInterval: payoutInterval,
            investedMoneyList: investedMoneyList,
            compoundInterestList: compoundInterestList,
          ),
        ),
      ),
    );

    expect(find.text('Endkapital:'), findsOneWidget);
    expect(find.text('$compoundInterest€'), findsOneWidget);
    expect(find.text('Einzahlungen:'), findsOneWidget);
    expect(find.text('$investedMoney€'), findsOneWidget);
    expect(find.text('Erhaltene Zinsen:'), findsOneWidget);
    expect(find.text('${double.parse(compoundInterest) + double.parse(investedMoney)}€'), findsOneWidget);
  });

  testWidgets('Navigates to ChartPage on "Grafik" button press', (WidgetTester tester) async {
    final List<double> investedMoneyList = [100, 200, 300, 400, 500];
    final List<double> compoundInterestList = [100, 200, 300, 400, 1000];

    await tester.pumpWidget(
      MaterialApp(
        home: Material(
          child: ResultWidget(
            compoundInterest: '1000',
            investedMoney: '500',
            time: '5',
            monthlySavingsRate: '100',
            interestRate: '5',
            payoutInterval: PayoutInterval.monthly,
            investedMoneyList: investedMoneyList,
            compoundInterestList: compoundInterestList,
          ),
        ),
      ),
    );

    await tester.tap(find.text('Grafik'));
    await tester.pumpAndSettle();

    expect(find.byType(ChartPage), findsOneWidget);
  });

  testWidgets('Navigates to MilestonePage on "Meilensteine" button press', (WidgetTester tester) async {
    await tester.pumpWidget(
      const MaterialApp(
        home: Material(
          child: ResultWidget(
            compoundInterest: '1000',
            investedMoney: '500',
            time: '5',
            monthlySavingsRate: '100',
            interestRate: '5',
            payoutInterval: PayoutInterval.monthly,
            investedMoneyList: [],
            compoundInterestList: [],
          ),
        ),
      ),
    );

    await tester.tap(find.text('Meilensteine'));
    await tester.pumpAndSettle();

    expect(find.byType(MilestonePage), findsOneWidget);
  });
});

  group('Error Widget Tests', () {
    testWidgets('Displays error message correctly', (WidgetTester tester) async {
      const String errorMessage = 'This is an error message';

      await tester.pumpWidget(
        const CupertinoApp(
          home: Material(
            child: ErrWidget(
              errorMessage: errorMessage,
            ),
          ),
        ),
      );

      expect(find.byIcon(CupertinoIcons.exclamationmark_circle_fill), findsOneWidget);
      expect(find.text(errorMessage), findsOneWidget);
    });
  });
}