import 'package:flutter_test/flutter_test.dart';
import 'package:food_ai/shared/models/user.dart';

void main() {
  group('User.fromJson', () {
    test('deserializes full object', () {
      final json = {
        'id': 'user-1',
        'email': 'test@example.com',
        'name': 'Test User',
        'avatar_url': 'https://avatar.url/pic.jpg',
        'height_cm': 180,
        'weight_kg': 75.5,
        'age': 28,
        'gender': 'male',
        'activity': 'moderate',
        'goal': 'maintain',
        'daily_calories': 2500,
        'plan': 'free',
        'preferences': {'cuisines': ['russian']},
      };

      final user = User.fromJson(json);

      expect(user.id, 'user-1');
      expect(user.email, 'test@example.com');
      expect(user.name, 'Test User');
      expect(user.avatarUrl, 'https://avatar.url/pic.jpg');
      expect(user.heightCm, 180);
      expect(user.weightKg, 75.5);
      expect(user.age, 28);
      expect(user.gender, 'male');
      expect(user.activity, 'moderate');
      expect(user.goal, 'maintain');
      expect(user.dailyCalories, 2500);
      expect(user.plan, 'free');
      expect(user.preferences['cuisines'], ['russian']);
    });

    test('deserializes minimal object (required fields only)', () {
      final json = {
        'id': 'user-2',
        'email': 'min@example.com',
        'name': 'Min User',
        'plan': 'paid',
      };

      final user = User.fromJson(json);

      expect(user.id, 'user-2');
      expect(user.email, 'min@example.com');
      expect(user.name, 'Min User');
      expect(user.plan, 'paid');
      expect(user.avatarUrl, isNull);
      expect(user.heightCm, isNull);
      expect(user.weightKg, isNull);
      expect(user.age, isNull);
      expect(user.gender, isNull);
      expect(user.dailyCalories, isNull);
      expect(user.preferences, isEmpty);
    });

    test('handles snake_case to camelCase mapping', () {
      final json = {
        'id': 'user-3',
        'email': 'test@example.com',
        'name': 'Test',
        'plan': 'free',
        'avatar_url': 'https://pic.url',
        'height_cm': 170,
        'weight_kg': 65.0,
        'daily_calories': 2000,
      };

      final user = User.fromJson(json);

      expect(user.avatarUrl, 'https://pic.url');
      expect(user.heightCm, 170);
      expect(user.weightKg, 65.0);
      expect(user.dailyCalories, 2000);
    });

    test('roundtrip fromJson -> toJson -> fromJson', () {
      final original = User(
        id: 'user-4',
        email: 'roundtrip@example.com',
        name: 'Roundtrip',
        avatarUrl: 'https://avatar.url',
        heightCm: 175,
        weightKg: 70.0,
        age: 30,
        gender: 'female',
        activity: 'high',
        goal: 'lose',
        dailyCalories: 1800,
        plan: 'paid',
        preferences: {'cuisines': ['asian']},
      );

      final json = original.toJson();
      final restored = User.fromJson(json);

      expect(restored.id, original.id);
      expect(restored.email, original.email);
      expect(restored.name, original.name);
      expect(restored.avatarUrl, original.avatarUrl);
      expect(restored.heightCm, original.heightCm);
      expect(restored.weightKg, original.weightKg);
      expect(restored.age, original.age);
      expect(restored.gender, original.gender);
      expect(restored.plan, original.plan);
      expect(restored.dailyCalories, original.dailyCalories);
    });

    test('ignores unknown fields', () {
      final json = {
        'id': 'user-5',
        'email': 'test@example.com',
        'name': 'Test',
        'plan': 'free',
        'unknown_field': 42,
        'another_unknown': 'hello',
      };

      final user = User.fromJson(json);

      expect(user.id, 'user-5');
      expect(user.email, 'test@example.com');
    });
  });

  group('User.hasCompletedOnboarding', () {
    test('returns false when body params are missing', () {
      const user = User(
        id: '1',
        email: 'test@test.com',
        name: 'Test',
        plan: 'free',
      );

      expect(user.hasCompletedOnboarding, isFalse);
    });

    test('returns true when all body params are present', () {
      const user = User(
        id: '1',
        email: 'test@test.com',
        name: 'Test',
        plan: 'free',
        heightCm: 180,
        weightKg: 75.0,
        age: 28,
        gender: 'male',
      );

      expect(user.hasCompletedOnboarding, isTrue);
    });
  });
}