using NUnit.Framework;
using UnityEngine;
using System.Collections;
using UnityEngine.TestTools;

namespace Tests.EditMode
{
    public class BootstrapTests
    {
        private Bootstrap.CustomBootSettings settings;
        private GameObject prefab1;
        private GameObject prefab2;

        [SetUp]
        public void SetUp()
        {
            settings = ScriptableObject.CreateInstance<Bootstrap.CustomBootSettings>();
            settings.name = "TestSettings";
            prefab1 = GameObject.CreatePrimitive(PrimitiveType.Cube);
            prefab1.name = "Prefab1";
            prefab2 = GameObject.CreatePrimitive(PrimitiveType.Sphere);
            prefab2.name = "Prefab2";
        }

        [TearDown]
        public void TearDown()
        {
            // Settings will clean up the container and instantiated prefabs
            settings.Cleanup();
            
            // Clean up the prefab templates
            if (prefab1 != null) Object.DestroyImmediate(prefab1);
            if (prefab2 != null) Object.DestroyImmediate(prefab2);
            if (settings != null) Object.DestroyImmediate(settings);
        }

        [Test]
        public void InitialiseSync_CreatesContainerWithCorrectName()
        {
            // Arrange
            settings.BootPrefabs = new[] { prefab1 };

            // Act
            settings.InitialiseSync();

            // Access the RuntimeContainer through reflection since it's private
            var containerField = typeof(Bootstrap.CustomBootSettings).GetField("RuntimeContainer", 
                System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance);
            var container = containerField.GetValue(settings) as GameObject;

            // Assert
            Assert.IsNotNull(container, "RuntimeContainer should not be null");
            Assert.AreEqual($"{settings.name}_Container", container.name, 
                "Container should be named with the pattern {settings.name}_Container");
        }

        [Test]
        public void InitialiseSync_InstantiatesAllPrefabs()
        {
            // Arrange
            settings.BootPrefabs = new[] { prefab1, prefab2 };

            // Act
            settings.InitialiseSync();

            // Access the RuntimeContainer and Instances through reflection
            var containerField = typeof(Bootstrap.CustomBootSettings).GetField("RuntimeContainer", 
                System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance);
            var container = containerField.GetValue(settings) as GameObject;
            
            var instancesField = typeof(Bootstrap.CustomBootSettings).GetField("Instances", 
                System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance);
            var instances = instancesField.GetValue(settings) as GameObject[];

            // Assert
            Assert.IsNotNull(container, "RuntimeContainer should not be null");
            Assert.AreEqual(2, container.transform.childCount, "Container should have 2 child objects");
            Assert.IsNotNull(instances, "Instances array should not be null");
            Assert.AreEqual(2, instances.Length, "Instances array should have 2 elements");
            
            Assert.IsNotNull(instances[0], "First instance should not be null");
            Assert.IsTrue(instances[0].name.StartsWith(prefab1.name), 
                $"First instance name '{instances[0].name}' should start with prefab name '{prefab1.name}'");
            Assert.AreEqual(container.transform, instances[0].transform.parent, "First instance should be a child of the container");
            
            Assert.IsNotNull(instances[1], "Second instance should not be null");
            Assert.IsTrue(instances[1].name.StartsWith(prefab2.name), 
                $"Second instance name '{instances[1].name}' should start with prefab name '{prefab2.name}'");
            Assert.AreEqual(container.transform, instances[1].transform.parent, "Second instance should be a child of the container");
        }

        [Test]
        public void InitialiseSync_HandlesNullPrefabs()
        {
            // Arrange
            settings.BootPrefabs = new GameObject[] { prefab1, null, prefab2 };

            // Act
            settings.InitialiseSync();

            // Access the RuntimeContainer and Instances through reflection
            var containerField = typeof(Bootstrap.CustomBootSettings).GetField("RuntimeContainer", 
                System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance);
            var container = containerField.GetValue(settings) as GameObject;
            
            var instancesField = typeof(Bootstrap.CustomBootSettings).GetField("Instances", 
                System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance);
            var instances = instancesField.GetValue(settings) as GameObject[];

            // Assert
            Assert.IsNotNull(container, "RuntimeContainer should not be null");
            Assert.AreEqual(2, container.transform.childCount, "Container should have 2 child objects (skipping the null prefab)");
            Assert.AreEqual(3, instances.Length, "Instances array should have 3 elements (including null)");
            
            Assert.IsNotNull(instances[0], "First instance should not be null");
            Assert.IsNull(instances[1], "Second instance should be null");
            Assert.IsNotNull(instances[2], "Third instance should not be null");
        }

        [Test]
        public void InitialiseSync_EmptyPrefabsArray_CreatesContainerOnly()
        {
            // Arrange
            settings.BootPrefabs = new GameObject[0];

            // Act
            settings.InitialiseSync();

            // Access the RuntimeContainer through reflection
            var containerField = typeof(Bootstrap.CustomBootSettings).GetField("RuntimeContainer", 
                System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance);
            var container = containerField.GetValue(settings) as GameObject;
            
            var instancesField = typeof(Bootstrap.CustomBootSettings).GetField("Instances", 
                System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance);
            var instances = instancesField.GetValue(settings) as GameObject[];

            // Assert
            Assert.IsNotNull(container, "RuntimeContainer should be created even with empty prefabs array");
            Assert.AreEqual(0, container.transform.childCount, "Container should have no children");
            Assert.AreEqual(0, instances.Length, "Instances array should be empty");
        }
    }
}