using System.Collections;
using System.Collections.Generic;
using System.Linq;

using UnityEditor;

using UnityEngine;

using XericLibrary.Runtime.MacroLibrary;
using XericLibrary.Runtime.Type;

using static UnityEngine.GraphicsBuffer;

namespace XericLibrary.Runtime.Generation
{
	public class BaseGenerate<T> : WeaklyMonoBase
	where T : WeaklyObject
	{
		#region 字段属性

		/// <summary>
		/// 生成器
		/// </summary>
		[SerializeField]
		private T GenerationCompute;

		#endregion

		#region 生命周期



		#endregion

		#region 快捷静态

		/// <summary>
		/// 复制一个组件到另一个组件中
		/// <code>
		/// 这个方法只能用于 MonoBehaviours 或普通 C# 类的字段和属性，
		/// 不能用于 Unity 内置组件（例如 Transform、Rigidbody 等）的复制，
		/// 因为这些组件的字段和属性通常是私有的。
		/// </code>
		/// </summary>
		/// <typeparam name="COMPONENT"></typeparam>
		/// <param name="SOURCE"></param>
		/// <param name="CopyTo"></param>
		/// <returns></returns>
		public static COMPONENT CopyComponentToAnother<COMPONENT>(COMPONENT source, COMPONENT copied)
		where COMPONENT : Component
		{
			if(source == null || copied == null)
			{
				Debug.LogWarning("Source or target component is null. Cannot copy parameters.");
				return null;
			}

			System.Type type = typeof(T);
			var fields = type.GetFields();
			var properties = type.GetProperties();

			// 复制只考虑公共字段属性
			foreach(var field in fields)
			{
				if(!field.IsStatic)
				{
					field.SetValue(copied, field.GetValue(source));
				}
			}

			foreach(var property in properties)
			{
				if(property.CanWrite)
				{
					property.SetValue(copied, property.GetValue(source, null), null);
				}
			}

			return copied;
		}

		/// <summary>
		/// 从给定的物体上克隆一个组件到新的物体上
		/// <code>
		/// 这个方法适用于所有类型的组件
		/// </code>
		/// </summary>
		/// <typeparam name="COMPONENT"></typeparam>
		/// <param name="source"></param>
		/// <param name="copied"></param>
		/// <returns></returns>
		public static COMPONENT CopyComponentToNew<COMPONENT>(GameObject source, out GameObject copied)
		where COMPONENT : Component
		{
			Component[] allComponents = source.GetComponents<Component>();
			copied = Instantiate(source);

			foreach(Component component in copied.GetComponents<Component>())
			{
				if(component.GetType() != typeof(COMPONENT))
				{
#if UNITY_EDITOR
					if(PlayModeState != PlayModeStateChange.EnteredPlayMode)
						DestroyImmediate(component);
					else
						Destroy(component);
#else
					Destroy(component);
#endif
				}
			}
			return copied.GetComponent<COMPONENT>();
		}

		#endregion

		#region 快捷方法

		/// <summary>
		/// 创建节点
		/// </summary>
		protected GameObject CreatOrGetGameNode(string name, Transform parent = null)
		{
			var targetParent = parent == null ? transform : parent;

			var node = targetParent.GetChildren()
			.Where(a => a.name == name)
			.Select(a => a.gameObject)
			.FirstOrDefault();

			if(node != null)
				return node;

			node = new GameObject(name);
			node.transform.parent = targetParent;
			return node;
		}

		/// <summary>
		/// 使给定的游戏节点断子绝孙
		/// </summary>
		protected void DieSonless(Transform transform)
		{
			foreach(var target in transform.GetChildren().ToList())
			{
#if UNITY_EDITOR
				if(PlayModeState != PlayModeStateChange.EnteredPlayMode)
					DestroyImmediate(target.gameObject);
				else
					Destroy(target.gameObject);
#else
				Destroy(target.gameObject);
#endif
			}
		}

		/// <summary>
		/// 使给定的游戏节点断子绝孙
		/// </summary>
		protected void DieSonless(GameObject target)
		{
			DieSonless(target.transform);
		}

		/// <summary>
		/// 提取所有组件，然后在同级中另起一个节点进行对指定组件结构的覆盖
		/// </summary>
		/// <typeparam name="COMPONENT"></typeparam>
		/// <param name="transform">要提取组件的节点</param>
		/// <param name="name">复制时另起节点的名称</param>
		/// <param name="MaxStackDepth">最大检索深度</param>
		protected void ExtractAllComponent<COMPONENT>(Transform transform, string name, int MaxStackDepth = 20)
		where COMPONENT : Component 
		{
			var root = CreatOrGetGameNode(name, transform);
			DieSonless(root);

			int index = 0;
			// 提取组件
			foreach(var comp in transform.GetComponentsInRecursionChildren<COMPONENT>(MaxStackDepth))
			{
				CreatOrGetGameNode($"component.{index++}", root.transform);
				CopyComponentToNew<COMPONENT>(comp.gameObject, out var copiedObj);
				copiedObj.transform.parent = root.transform;
			}
		}

		#endregion

	}

#if UNITY_EDITOR

	/// <summary>
	/// 基本的创建辅助器，用于在inspecter上创建按钮或其他功能
	/// </summary>
	public class BaseGenerateEditor : Editor
	{
		public override void OnInspectorGUI()
		{
			base.OnInspectorGUI();

			if(GUILayout.Button("生成更新"))
				UpdateGen();
		}

		/// <summary>
		/// 更新生成
		/// </summary>
		protected void UpdateGen()
		{
			var script = (StairsGenerate)target;
		}

		
	}

#endif
}