using System;
using System.Linq;
using DotRecast.Core.Collections;
using JNGame.Math;
using JNGame.Sync.Entity.Component;
using JNGame.Sync.Frame.Entity;
using JNGame.Sync.Frame.Entity.Component.Components;
using JNGame.Sync.Frame.Entity.Components;
using JNGame.Sync.Frame.Service;
using JNGame.Sync.System;

namespace JNGame.Sync.Entity
{

    public interface IJNEntity : IJNSyncCycle,IJNSyncId
    {
        
        /// <summary>
        /// 坐标
        /// </summary>
        public JNTransformComponent Transform { get; }
        /// <summary>
        /// 位置
        /// </summary>
        public LVector3 Position { get; }
        
        public IJNContext GetContext();

        public T GetComponent<T>() where T : JNComponent;

    }
    
    public abstract class JNEntity : Entitas.Entity,IJNEntity,IComparable
    {

        private ulong _id;
        public ulong Id => _id;

        public IJNContext Context { get; private set; }

        //组件Lookup
        public JNEntityLookup CLookup{ get; set; }

        /// <summary>
        /// 坐标
        /// </summary>
        public JNTransformComponent Transform => CLookup.Query<JNTransformComponent>(this);
        /// <summary>
        /// 位置
        /// </summary>
        public LVector3 Position => Transform.Position;

        public void OnInit(IJNContext context,ulong id = 0)
        {
            Context = context;
            _id = id;
            if (_id <= 0)
            {
                _id = GetSystem<JNRandomSystem>().NextId();
            }
            Context.AddEntity(Id,this);
        }

        public abstract JNEntityLookup NewCLookup();

        public T GetSystem<T>() where T : SLogicSystem
        {
            return Context.GetSync().GetSystem<T>();
        }

        /// <summary>
        /// 获取组件
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <returns></returns>
        public T GetComponent<T>() where T : JNComponent
        {
            return CLookup.Query<T>(this);
        }

        /// <summary>
        /// 添加组件
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <returns></returns>
        public JNComponent AddComponent<T>() where T : JNComponent,new()
        {
            int index = CLookup.GetIndex<T>();
            var temp = CreateComponent<T>(index);
            temp.OnInit(this);
            base.AddComponent(index,temp);
            temp.OnSyncStart();
            return temp;
        }


        public void RemoveComponent<T>() where T : JNComponent,new()
        {
            int index = CLookup.GetIndex<T>();
            var component = CLookup.Query<T>(this);
            component.OnSyncDestroy();
            base.RemoveComponent(index);
        }


        public override void RemoveAllComponents()
        {
            GetComponents().ForEach(child => (child as JNComponent)?.OnSyncDestroy());
            base.RemoveAllComponents();
        }


        //实现排序实现
        public int CompareTo(object obj)
        {
            if (obj is IJNEntity entity)
            {
                return Id.CompareTo(entity.Id);
            }
            return 1;
        }
        
        public IJNContext GetContext()
        {
            return Context;
        }

        public override void Destroy()
        {
            Context.RemoveEntity(Id);
            OnSyncDestroy();
            RemoveAllComponents();
            base.Destroy();
        }

        //生命周期
        public virtual void OnSyncStart(){}

        public virtual void OnSyncUpdate()
        {
            //给组件推帧
            foreach (var component in GetComponents())
            {
                (component as JNComponent)?.OnSyncUpdate();
            }
        }

        public virtual void OnSyncDestroy()
        {}
    }
    
}