using System;
using NUnit.Framework;

namespace ShrinkDataSaver.Tests
{
    [TestFixture]
    public class DataSerializerTests
    {
        [Serializable]
        private class SimpleData
        {
            public string Name = "test";
            public int Score = 42;
        }

        [Serializable]
        private class NestedData
        {
            public string Id = "root";
            public SimpleData Child = new();
            public int[] Numbers = { 1, 2, 3 };
        }

        [Test]
        public void Serialize_Deserialize_SimpleObject()
        {
            var original = new SimpleData { Name = "Alice", Score = 100 };
            var bytes = DataSerializer.Serialize(original);
            var restored = DataSerializer.Deserialize<SimpleData>(bytes);

            Assert.AreEqual("Alice", restored.Name);
            Assert.AreEqual(100, restored.Score);
        }

        [Test]
        public void Serialize_Deserialize_NestedObject()
        {
            var original = new NestedData
            {
                Id = "parent",
                Child = new SimpleData { Name = "child", Score = 99 },
                Numbers = new[] { 10, 20, 30 }
            };

            var bytes = DataSerializer.Serialize(original);
            var restored = DataSerializer.Deserialize<NestedData>(bytes);

            Assert.AreEqual("parent", restored.Id);
            Assert.AreEqual("child", restored.Child.Name);
            Assert.AreEqual(99, restored.Child.Score);
            Assert.AreEqual(new[] { 10, 20, 30 }, restored.Numbers);
        }

        [Test]
        public void ToJObject_FromJObject_RoundTrip()
        {
            var original = new SimpleData { Name = "Bob", Score = 77 };
            var bytes = DataSerializer.Serialize(original);
            var jObj = DataSerializer.ToJObject(bytes);

            Assert.AreEqual("Bob", jObj["Name"].ToString());
            Assert.AreEqual(77, (int)jObj["Score"]);

            var bytesBack = DataSerializer.FromJObject(jObj);
            var restored = DataSerializer.Deserialize<SimpleData>(bytesBack);
            Assert.AreEqual("Bob", restored.Name);
            Assert.AreEqual(77, restored.Score);
        }

        [Test]
        public void Serialize_NullFields_Ignored()
        {
            var data = new SimpleData { Name = null, Score = 5 };
            var bytes = DataSerializer.Serialize(data);
            var json = System.Text.Encoding.UTF8.GetString(bytes);

            Assert.IsFalse(json.Contains("Name"));
            Assert.IsTrue(json.Contains("Score"));
        }
    }
}