import 'package:flutter/material.dart';
import 'package:flutter/services.dart';

import 'package:flutter_test/flutter_test.dart';

import 'package:go_router/go_router.dart';

import 'package:sxchnge_analytics/sxchnge_analytics.dart';

import 'package:sxchnge_auth/sxchnge_auth.dart';

import 'package:sxchnge_app/main.dart';
import 'package:sxchnge_app/routing/routes.dart';

Future<void> open(
  WidgetTester tester,
  String path,
  DummyAnalyticsService sink,
) async {
  tester.platformDispatcher.defaultRouteNameTestValue = path;
  addTearDown(tester.platformDispatcher.clearDefaultRouteNameTestValue);
  await tester.pumpWidget(
    SxchngeApp(
      analyticsService: sink,
      signupService: const DummySignupService(delay: Duration.zero),
      verificationService: const DummyVerificationService(delay: Duration.zero),
    ),
  );
  await tester.pumpAndSettle();
}

Future<void> tap(WidgetTester tester, Finder finder) async {
  await tester.ensureVisible(finder);
  await tester.tap(finder);
  await tester.pumpAndSettle();
}

void main() {
  testWidgets(
    'recipient change removes sent claim, focuses editor and requires a new send',
    (tester) async {
      final sink = DummyAnalyticsService();
      await open(tester, '/verification-sent', sink);
      final email = find.byKey(const ValueKey('verification-email'));
      await tester.enterText(email, 'alex@example.com');
      await tap(tester, find.byKey(const ValueKey('verification-resend')));
      expect(email, findsNothing);
      expect(
        find.byKey(const ValueKey('verification-recipient')),
        findsOneWidget,
      );
      await tap(
        tester,
        find.byKey(const ValueKey('verification-change-email')),
      );
      expect(find.byKey(const ValueKey('verification-sent')), findsNothing);
      final editable = tester.widget<EditableText>(
        find.descendant(of: email, matching: find.byType(EditableText)),
      );
      expect(editable.focusNode.hasFocus, isTrue);
      await tester.enterText(email, 'different@example.com');
      expect(
        find.byKey(const ValueKey('verification-recipient')),
        findsNothing,
      );
      await tester.testTextInput.receiveAction(TextInputAction.send);
      await tester.pumpAndSettle();
      expect(find.text('different@example.com'), findsOneWidget);
      expect(
        sink.events
            .where(
              (e) =>
                  e.step == JourneyStep.emailDelivery &&
                  e.signal == JourneySignal.requested,
            )
            .length,
        2,
      );
    },
  );

  testWidgets(
    'confirmation error has primary retry and keyboard-accessible new-email recovery',
    (tester) async {
      final semantics = tester.ensureSemantics();
      final sink = DummyAnalyticsService();
      await open(tester, '/verify-email?token=demo-internal', sink);
      expect(
        tester.widget(find.byKey(const ValueKey('verification-retry'))),
        isA<FilledButton>(),
      );
      expect(find.byKey(const ValueKey('verification-email')), findsNothing);
      final node = tester.getSemantics(
        find.byKey(const ValueKey('verification-error')),
      );
      expect(node.getSemanticsData().flagsCollection.isHeader, isTrue);
      expect(node.getSemanticsData().flagsCollection.isLiveRegion, isTrue);
      await tap(tester, find.text('Send a new verification email'));
      await tester.enterText(
        find.byKey(const ValueKey('verification-email')),
        'alex@example.com',
      );
      await tester.sendKeyEvent(LogicalKeyboardKey.tab);
      await tester.pump();
      await tester.sendKeyEvent(LogicalKeyboardKey.enter);
      await tester.pumpAndSettle();
      expect(find.byKey(const ValueKey('verification-sent')), findsOneWidget);
      expect(sink.events.map((e) => e.journeyId).toSet().length, 1);
      semantics.dispose();
    },
  );

  testWidgets(
    'signup verification keeps simulated analytics with ordinary product copy',
    (tester) async {
      final sink = DummyAnalyticsService();
      await open(tester, '/', sink);
      await tap(tester, find.text('Sign up'));
      await tester.enterText(find.byKey(const ValueKey('name')), 'Alex');
      await tester.enterText(
        find.byKey(const ValueKey('email')),
        'alex@example.com',
      );
      await tester.enterText(
        find.byKey(const ValueKey('password')),
        'example-password',
      );
      await tester.enterText(
        find.byKey(const ValueKey('confirmation')),
        'example-password',
      );
      await tap(tester, find.byKey(const ValueKey('submit')));
      expect(find.text('Check your inbox.'), findsOneWidget);
      expect(find.textContaining('We’ve sent you'), findsOneWidget);
      await tap(tester, find.byKey(const ValueKey('demo-confirmation')));
      expect(find.text('Your email\nis verified.'), findsOneWidget);
      expect(sink.events.map((e) => e.journeyId).toSet().length, 1);
      expect(sink.events.where((e) => e.terminal).length, 1);
      expect(
        sink.events.where((e) => e.signal == JourneySignal.succeeded),
        isEmpty,
      );
      expect(sink.events.every((e) => e.simulated), isTrue);
      final payload = sink.events.map((e) => e.properties).toString();
      for (final secret in [
        'alex@example.com',
        'example-password',
        'Alex',
        'demo-valid',
      ]) {
        expect(payload, isNot(contains(secret)));
      }
      final count = sink.events.length;
      await tester.pumpAndSettle();
      expect(sink.events.length, count);
    },
  );

  testWidgets(
    'exit from a deep-linked failed confirmation records abandonment once',
    (tester) async {
      final sink = DummyAnalyticsService();
      await open(tester, '/verify-email?token=demo-expired', sink);
      await tap(tester, find.text('Back to login'));
      expect(sink.events.last.signal, JourneySignal.abandoned);
      expect(sink.events.last.exit, JourneyExit.navigation);
      expect(sink.events.where((e) => e.terminal).length, 1);
      final router = GoRouter.of(tester.element(find.byType(Scaffold)));
      router.goNamed(AppRoutes.login);
      await tester.pumpAndSettle();
      expect(sink.events.where((e) => e.terminal).length, 1);
    },
  );

  testWidgets(
    'verification controls have accessible labels and mobile tap targets',
    (tester) async {
      final semantics = tester.ensureSemantics();
      tester.view.physicalSize = const Size(390, 844);
      tester.view.devicePixelRatio = 1;
      addTearDown(tester.view.resetPhysicalSize);
      addTearDown(tester.view.resetDevicePixelRatio);
      await open(
        tester,
        '/verify-email?token=demo-internal',
        DummyAnalyticsService(),
      );
      await expectLater(tester, meetsGuideline(labeledTapTargetGuideline));
      await expectLater(tester, meetsGuideline(androidTapTargetGuideline));
      semantics.dispose();
    },
  );
}