using Entitas;
using UnityEngine;
using Game;
using System.Collections.Generic;

[Game]
public class ViewComponent : IComponent
{
    public EntityPoolItem EntityPoolItem;
    public GameObject GameObject;
    public GameObject GameObjectLogic;
    public Transform TransformLogic;
    public Transform TransformView;
    public Transform TransformViewRot;
    public Transform TransformViewOffset;
    public Transform TransformViewMain;
    public Transform TransformViewOther;
    public Collider Collider;
    public Material Material;
    public Vector3 PositionView => TransformViewMain.position;
    public Vector3 PositionLogic => TransformLogic.position;
    public Vector3 PositionPre;
    public SpriteRenderer SpriteRenderer; //物体的主要sprite

    public MetaData<Vector3> PosView = new MetaData<Vector3>();

    //额外对象
    public List<EffectPoolItem> EffectObject = new List<EffectPoolItem>(); //挂在实体上的特效
    public ShadowPoolItem SkillPointerObject; //技能指示器

    // 特殊效果
    public Vector3 LocalPositionOrder = Vector3.zero; //避免z-fighting
    public Vector3 LocalPositionShake = Vector3.zero; //抖动带来的额外偏移
    public Vector3 ScaleDir = Vector3.zero; //缩放方向
    public Color FlashColor = Color.white; //闪白颜色
    public float ShakeTimeLeft; //抖动剩余时间
    public float FlashTimeLeft; //闪白剩余时间
    public float ScaleTimeLeft; //缩放剩余时间
    public float ScaleRate; //缩放强度
}

namespace Game
{
    public abstract partial class Util
    {
        public static void EntityShake(GameEntity entity, int shakeTimes)
        {
            entity.view.ShakeTimeLeft = shakeTimes * GameConst.ShakeTerm;
        }

        public static void EntityFlash(GameEntity entity)
        {
            EntityFlash(entity, Color.white);
        }

        public static void EntityFlash(GameEntity entity, Color flashColor)
        {
            entity.view.FlashTimeLeft = GameConst.FlashTerm;
            entity.view.FlashColor = flashColor;
        }

        public static void EntityScale(GameEntity entity, Vector3 dir)
        {
            entity.view.ScaleTimeLeft = GameConst.ScaleTerm;
            entity.view.ScaleDir = dir;
            var rate = Mathf.Clamp01((dir.magnitude - GameConst.ScaleFloatingMin) /
                                     (GameConst.ScaleFloatingMax - GameConst.ScaleFloatingMin));
            var scaleRate = Mathf.Lerp(GameConst.ScaleRateMin, GameConst.ScaleRateMax, rate);

            entity.view.ScaleRate = scaleRate;
        }

        public static void SetEntityPos(GameEntity entity, Vector3 pos)
        {
            entity.view.GameObject.transform.position = pos;
        }

        public static int GetEntityLayer(GameEntity entity)
        {
            return entity.view.GameObject.layer;
        }

        public static void SetEntityLayer(GameEntity entity, int layer)
        {
            entity.view.GameObject.layer = layer;
        }

        public static Vector3 EntityLogicPos(int entity)
        {
            var e = Util.GetEntity(entity);
            if (e == null)
            {
                return Vector3.zero;
            }

            return EntityLogicPos(e);
        }

        public static Vector3 EntityLogicPos(GameEntity entity)
        {
            return entity.view.TransformLogic.position;
        }

        public static Vector3 EntityViewPos(int entity)
        {
            var e = Util.GetEntity(entity);
            if (e == null)
            {
                return Vector3.zero;
            }

            return EntityViewPos(e);
        }

        public static Vector3 EntityViewPos(GameEntity entity)
        {
            return entity.view.TransformViewMain.position;
        }

        public static float EntityDistance(int entity1, int entity2)
        {
            var e1 = Util.GetEntity(entity1);
            var e2 = Util.GetEntity(entity2);
            if (e1 == null || e2 == null)
            {
                return 0;
            }

            return EntityDistance(e1, e2);
        }

        public static float EntityDistance(GameEntity entity1, GameEntity entity2)
        {
            return Vector3.Distance(EntityLogicPos(entity1), EntityLogicPos(entity2));
        }

        public static float EntityDistanceXZ(int entity1, int entity2)
        {
            var e1 = Util.GetEntity(entity1);
            var e2 = Util.GetEntity(entity2);
            if (e1 == null || e2 == null)
            {
                return 0;
            }

            return EntityDistanceXZ(e1, e2);
        }

        public static float EntityDistanceXZ(GameEntity entity1, GameEntity entity2)
        {
            var pos1 = EntityLogicPos(entity1);
            var pos2 = EntityLogicPos(entity2);
            pos1.y = 0;
            pos2.y = 0;
            return Vector3.Distance(pos1, pos2);
        }

        public static Vector3 EntityOffset(int entity1, int entity2)
        {
            var e1 = Util.GetEntity(entity1);
            var e2 = Util.GetEntity(entity2);
            if (e1 == null || e2 == null)
            {
                return Vector3.zero;
            }

            return EntityOffset(e1, e2);
        }

        public static Vector3 EntityOffset(GameEntity entity1, GameEntity entity2)
        {
            return EntityLogicPos(entity2) - EntityLogicPos(entity1);
        }

        public static void ClearView(GameEntity entity)
        {
            var view = entity.view;
            //特效销毁
            foreach (var item in view.EffectObject)
            {
                item.EffectDestroy();
            }

            view.EffectObject.Clear();
            //删除技能指示器
            if (view.SkillPointerObject != null)
            {
                view.SkillPointerObject.Destroy();
            }

            //重置shader参数
            view.Material.SetColor("_FlashColor", new Color(1f, 1f, 1f, 1f));

            entity.view.GameObjectLogic.SetActive(true);
            view.EntityPoolItem.Destroy();
        }
    }
}