import 'package:flutter_test/flutter_test.dart';

void main() {
  group('Auth Validation', () {
    test('email is required for login', () {
      final email = '';
      expect(email.isEmpty, isTrue);
    });

    test('password is required for login', () {
      final password = '';
      expect(password.isEmpty, isTrue);
    });

    test('valid email format', () {
      final email = 'user@example.com';
      final emailRegex = RegExp(r'^[^\s@]+@[^\s@]+\.[^\s@]+$');
      expect(emailRegex.hasMatch(email), isTrue);
    });

    test('invalid email format rejected', () {
      final invalidEmails = [
        'notanemail',
        'missing@',
        '@nodomain.com',
      ];
      
      final emailRegex = RegExp(r'^[^\s@]+@[^\s@]+\.[^\s@]+$');
      
      for (final email in invalidEmails) {
        expect(emailRegex.hasMatch(email), isFalse);
      }
    });

    test('password minimum length', () {
      final password = 'short';
      final minLength = 8;
      expect(password.length >= minLength, isFalse);
    });

    test('valid password length', () {
      final password = 'securepassword123';
      final minLength = 8;
      expect(password.length >= minLength, isTrue);
    });
  });

  group('Registration Validation', () {
    test('name is required', () {
      final name = '';
      expect(name.isEmpty, isTrue);
    });

    test('name has minimum length', () {
      final name = 'J';
      final minLength = 2;
      expect(name.length >= minLength, isFalse);
    });

    test('password confirmation must match', () {
      final password = 'securepassword';
      final confirmation = 'securepassword';
      expect(password == confirmation, isTrue);
    });

    test('mismatched passwords detected', () {
      final password = 'securepassword';
      final confirmation = 'differentpassword';
      expect(password == confirmation, isFalse);
    });
  });

  group('Token Management', () {
    test('token is stored after login', () {
      final token = 'jwt_token_here';
      expect(token.isNotEmpty, isTrue);
    });

    test('token format is valid', () {
      // Simple check - real JWT has 3 parts separated by dots
      final token = 'header.payload.signature';
      final parts = token.split('.');
      expect(parts.length, 3);
    });

    test('empty token is invalid', () {
      final token = '';
      expect(token.isEmpty, isTrue);
    });
  });

  group('Auth State', () {
    test('initial state is unauthenticated', () {
      const isAuthenticated = false;
      expect(isAuthenticated, isFalse);
    });

    test('state changes after login', () {
      var isAuthenticated = false;
      
      // Simulate login
      isAuthenticated = true;
      
      expect(isAuthenticated, isTrue);
    });

    test('state changes after logout', () {
      var isAuthenticated = true;
      
      // Simulate logout
      isAuthenticated = false;
      
      expect(isAuthenticated, isFalse);
    });
  });
}