// ***********************************************************************
// Assembly         : Unity
// Author           : Kimch
// Created          : 2018-2-29
// Description      :
// Last Modified By : 
// Last Modified On : 
// ***********************************************************************
// <copyright file= "Entity" company=""></copyright>
// <summary></summary>
// ***********************************************************************
using System.Collections.Generic;
using F.Entity;
using UnityEngine;

namespace G
{
	public enum EntityType
	{
		None,
		Drop,
		Prop,
		Pet,
		Mount,

		//Enemy,
		Minion,
		Elite,
		Boss,

		Npc,
		General,
		Player,
		MainPlayer,
	}

	/// <summary>
	/// 
	/// </summary>
	public class Entity : MonoBehaviour, IEntity
	{
		#region Property 

		/// <summary>
		/// 唯一标识
		/// </summary>
		public int id
		{
			get;
			protected set;
		}

		/// <summary>
		/// 配置ID
		/// </summary>
		public int itemId
		{
			get;
			protected set;
		}

		/// <summary>
		/// 实体类型
		/// </summary>
		public virtual EntityType entityType
		{
			get { return EntityType.None; }
		}

		/// <summary>
		/// 实体表现类
		/// </summary>
		public EntityView entityView
		{
			get;
			private set;
		}

		/// <summary>
		/// 
		/// </summary>
		public Vector3 position
		{
			get { return this.transform.position; }
			set { this.transform.position = value; }
		}

		/// <summary>
		/// 
		/// </summary>
		public Quaternion rotation
		{
			get { return this.transform.localRotation; }
			set { this.transform.localRotation = value; }
		}

		/// <summary>
		/// 
		/// </summary>
		public Vector3 eulerAngles
		{
			get { return this.transform.localEulerAngles; }
			set { this.transform.localEulerAngles = value; }
		}

		/// <summary>
		/// 
		/// </summary>
		public Vector3 scale
		{
			get { return this.transform.localScale; }
			set { this.transform.localScale = value; }
		}

		/// <summary>
		/// 设置统一缩放
		/// </summary>
		public float unityScale
		{
			get { return this.transform.localScale.x; }
			set { this.transform.localScale = Vector3.one * value; }
		}

		/// <summary>
		/// 
		/// </summary>
		public Vector3 forward
		{
			get { return this.transform.forward; }
		}

		/// <summary>
		/// 
		/// </summary>
		public Vector3 up
		{
			get { return this.transform.up; }
		}

		/// <summary>
		/// 
		/// </summary>
		public Vector3 right
		{
			get { return this.transform.right; }
		}

		/// <summary>
		/// 
		/// </summary>
		public Entity parent
		{
			get { return EntityManager.Instance.GetParent(this.id); }
			set
			{
				if (value != null)
				{
					EntityManager.Instance.SetParent(this.id, value.id);
				}
			}
		}

		/// <summary>
		/// 
		/// </summary>
		/// <param name="children"></param>
		public void GetChildren(List<Entity> children)
		{
			if (children != null)
				EntityManager.Instance.GetChildren(this.id, children);
		}

		#endregion

		#region Method

		/// <summary>
		/// 
		/// </summary>
		public Entity()
		{
			this.entityView = new EntityView(this);
		}

		/// <summary>
		/// 
		/// </summary>
		public void InitView()
		{
			this.entityView.Init(this.OnViewInitCompleted);
		}

		/// <summary>
		/// 
		/// </summary>
		protected virtual void OnViewInitCompleted()
		{
			//Debug.Log($"{this.entityType} OnViewInitCompleted");
		}

		/// <summary>
		/// 判断物体是否在自己前方
		/// </summary>
		/// <param name="target"></param>
		/// <returns></returns>
		public bool IsInFront2D(Entity target)
		{
			if (target == null)
			{
				return false;
			}

			var toward = target.position - this.position;
			toward.y = 0f;
			var forward = this.forward;
			forward.y = 0f;
			return Vector3.Dot(toward, forward) > 0;
		}

		/// <summary>
		/// 物体之间的距离
		/// </summary>
		/// <param name="target"></param>
		/// <returns></returns>
		public float Distance2D(Entity target)
		{
			if (target == null)
			{
				return float.MaxValue;
			}
			var toward = target.position - this.position;
			toward.y = 0f;
			return toward.magnitude;
		}

		#endregion

		#region Interface 

		/// <summary>
		/// 回收
		/// </summary>
		public void OnRecycle()
		{

		}

		/// <summary>
		/// 销毁
		/// </summary>
		public virtual void Dispose()
		{
			this.entityView.Dispose();
			if (gameObject)
				Destroy(gameObject);
		}

		/// <summary>
		/// 显示
		/// </summary>
		/// <param name="userData"></param>
		public void OnShow(object userData)
		{
		}

		/// <summary>
		/// 隐藏
		/// </summary>
		/// <param name="userData"></param>
		public void OnHide(object userData)
		{
		}

		protected virtual void UpdateInternal(float delta)
		{

		}

		public virtual void UpdatePerSecond()
		{

		}

		object IEntity.handle
		{
			get { return this.entityView; }
		}

		void IEntity.OnUpdate(float deltaTime)
		{
			this.UpdateInternal(deltaTime);
			this.entityView.OnUpdate(deltaTime);
		}

		void IEntity.OnUpdatePerSecond()
		{
			this.UpdatePerSecond();
		}

		#endregion
	}
}