import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:integration_test/integration_test.dart';
import 'package:go_router/go_router.dart';

import 'package:sage/main.dart' as app;
import 'package:sage/core/router/app_router.dart';

/// Integration test for password reset flow
/// 
/// Tests the complete password reset journey:
/// 1. Navigate to password reset from login
/// 2. Request password reset
/// 3. Handle deep link with token
/// 4. Update password
/// 5. Navigate back to login
void main() {
  IntegrationTestWidgetsFlutterBinding.ensureInitialized();

  group('Password Reset Flow', () {
    testWidgets('complete password reset flow works correctly', (WidgetTester tester) async {
      // Launch app
      app.main();
      await tester.pumpAndSettle();

      // Start from login screen (if not already there)
      // Navigate to password reset
      final forgotPasswordButton = find.text('Forgot Password?');
      expect(forgotPasswordButton, findsOneWidget);
      
      await tester.tap(forgotPasswordButton);
      await tester.pumpAndSettle();

      // Should be on reset password page
      expect(find.text('Reset Password'), findsOneWidget);
      expect(find.text('Forgot Password?'), findsOneWidget);
      
      // Test deep linking by simulating URL with token
      // This would normally be triggered by email link
      final context = tester.element(find.byType(Scaffold));
      
      // Navigate to reset password confirm with token
      GoRouter.of(context).go('/reset-password-confirm?token=test123&email=test@example.com');
      await tester.pumpAndSettle();
      
      // Should be on reset password confirm page
      expect(find.text('Reset Password'), findsOneWidget);
      
      // Navigate to update password with token
      GoRouter.of(context).go('/update-password?token=test123&email=test@example.com');
      await tester.pumpAndSettle();
      
      // Should be on update password page
      expect(find.text('Update Password'), findsOneWidget);
      expect(find.text('Set New Password'), findsOneWidget);
    });

    testWidgets('password reset navigation from signup works', (WidgetTester tester) async {
      // Launch app
      app.main();
      await tester.pumpAndSettle();

      // Navigate to signup first
      final signupButton = find.text('Sign Up');
      if (signupButton.evaluate().isNotEmpty) {
        await tester.tap(signupButton);
        await tester.pumpAndSettle();
      }

      // Look for forgot password link on signup page
      final signupForgotPassword = find.text('Forgot Password?');
      expect(signupForgotPassword, findsOneWidget);
      
      await tester.tap(signupForgotPassword);
      await tester.pumpAndSettle();

      // Should navigate to reset password page
      expect(find.text('Reset Password'), findsOneWidget);
      expect(find.text('Forgot Password?'), findsOneWidget);
    });

    testWidgets('deep linking handles malformed URLs gracefully', (WidgetTester tester) async {
      // Launch app
      app.main();
      await tester.pumpAndSettle();

      // Test malformed reset URL
      final context = tester.element(find.byType(Scaffold));
      GoRouter.of(context).go('/reset-password-invalid');
      await tester.pumpAndSettle();

      // Should show error page with option to request new reset
      expect(find.text('Page not found'), findsOneWidget);
      expect(find.text('Request New Reset Link'), findsOneWidget);
    });

    testWidgets('router extracts URL parameters correctly', (WidgetTester tester) async {
      // Launch app
      app.main();
      await tester.pumpAndSettle();

      // Navigate with URL parameters
      final context = tester.element(find.byType(Scaffold));
      GoRouter.of(context).go('/reset-password-confirm?token=abc123&email=user@example.com');
      await tester.pumpAndSettle();

      // Extract parameters using router helper
      final params = AppRouter.extractQueryParameters(context);
      expect(params['token'], 'abc123');
      expect(params['email'], 'user@example.com');
      
      // Test deep link handler
      final resetData = AppRouter.handlePasswordResetDeepLink(context);
      expect(resetData['token'], 'abc123');
      expect(resetData['email'], 'user@example.com');
    });
  });

  group('Navigation Guards', () {
    testWidgets('password reset routes are accessible without auth', (WidgetTester tester) async {
      // Launch app
      app.main();
      await tester.pumpAndSettle();

      // Test all password reset routes are accessible
      final context = tester.element(find.byType(Scaffold));
      
      // Test /reset-password
      GoRouter.of(context).go('/reset-password');
      await tester.pumpAndSettle();
      expect(find.text('Reset Password'), findsOneWidget);
      
      // Test /reset-password-confirm
      GoRouter.of(context).go('/reset-password-confirm');
      await tester.pumpAndSettle();
      expect(find.text('Reset Password'), findsOneWidget);
      
      // Test /update-password
      GoRouter.of(context).go('/update-password');
      await tester.pumpAndSettle();
      expect(find.text('Update Password'), findsOneWidget);
    });
  });
}