using System;
using System.Collections.Generic;
using System.Text;
using CommonAI.RTS;
using CommonLang.Vector;

using CommonLang;
using CommonAI.Zone.Helper;
using CommonAI.RTS.Manhattan;
using CommonAI.Zone.ZoneEditor;

namespace CommonAI.Zone.Instance
{
    public abstract class InstanceFlag : GameEntity, IPositionObject
    {

        public abstract float Direction { get; }
        public abstract float RadiusSize { get; }

        public InstanceZone Parent { get { return mParent; } }
        public string Name { get { return mName; } }
        public string Alias { get { return mAlias; } }
        public Vector2 Pos { get { return mPos; } }
        public float X { get { return mPos.X; } }
        public float Y { get { return mPos.Y; } }

        private Vector2 mPos = new Vector2();
        private readonly string mName;
        private readonly string mAlias;
        private readonly string mSrcTag = null;
        private bool mEnableTriggerd = false;
        private bool mEnable = true;
        private InstanceZone mParent;
        private string mTag;

        public bool Enable
        {
            get { return mEnable; }
            set
            {
                if (!mEnableTriggerd || mEnable != value)
                {
                    mEnableTriggerd = true;
                    mEnable = value;
                    if (mEnable)
                    {
                        if (mOnFlagEnabled != null)
                            mOnFlagEnabled.Invoke(this);
                    }
                    else
                    {
                        if (mOnFlagDisabled != null)
                            mOnFlagDisabled.Invoke(this);
                    }
                }
            }
        }
        public string Tag
        {
            get { return mTag; }
            set
            {
                if (mTag != value)
                {
                    mTag = value;
                    Parent.queueEvent(new FlagTagChangedEvent(this.mName, this.mTag));
                }
            }
        }
        public string SrcTag
        {
            get { return mSrcTag; }
        }


        public InstanceFlag(InstanceZone zone, ZoneEditor.SceneObjectData data)
        {
            this.mParent = zone;
            this.mName = data.Name;
            this.mAlias = data.Alias;
            this.mPos = new Vector2(data.X, data.Y);
            this.mTag = data.Tag;
        }

        protected override void Disposing()
        {
            base.Disposing();
            this.clearEvents();
        }

        virtual internal void onAdded()
        {
            if (mOnInit != null)
            {
                mOnInit.Invoke(this);
            }
        }
        protected internal virtual void OnStart()
        {

        }

        virtual internal void update()
        {
        }

        abstract public TVector2 getRandomPos(Random random);

        //----------------------------------------------------------------------------
        #region IFlagAPI

        public bool get_enable()
        {
            return Enable;
        }
        public bool set_enable(bool e)
        {
            Enable = e;
            return e;
        }
        public string get_name()
        {
            return Name;
        }
        public float get_x()
        {
            return X;
        }
        public float get_y()
        {
            return Y;
        }
        /// <summary>
        /// Show Check Point
        /// </summary>
        /// <param name="target"></param>
        public void look_at_target(string target)
        {
            mParent.queueEvent(new LookAtEvent(target, 0, 0));
        }

        #endregion

        //----------------------------------------------------------------------------
        #region Delegate


        /// <summary>
        /// 触发器开始
        /// </summary>
        /// <param name="flag"></param>
        public delegate void InitHandler(InstanceFlag flag);

        /// <summary>
        /// 触发器被开启
        /// </summary>
        /// <param name="flag"></param>
        public delegate void FlagEnabledHandler(InstanceFlag flag);

        /// <summary>
        /// 触发器被关闭
        /// </summary>
        /// <param name="flag"></param>
        public delegate void FlagDisabledHandler(InstanceFlag flag);

        private InitHandler mOnInit;
        private FlagEnabledHandler mOnFlagEnabled;
        private FlagDisabledHandler mOnFlagDisabled;

        public event InitHandler OnInit { add { mOnInit += value; } remove { mOnInit -= value; } }
        public event FlagEnabledHandler OnFlagEnabled { add { mOnFlagEnabled += value; } remove { mOnFlagEnabled -= value; } }
        public event FlagDisabledHandler OnFlagDisabled { add { mOnFlagDisabled += value; } remove { mOnFlagDisabled -= value; } }

        protected virtual void clearEvents()
        {
            mOnInit = null;
            mOnFlagEnabled = null;
            mOnFlagDisabled = null;
        }

        #endregion
        //----------------------------------------------------------------------------

    }

    public class ZoneRegion : InstanceFlag, ViewTrigger.ViewTriggerListener
    {
        public ZoneEditor.RegionData.Shape RegionType { get { return mShape; } }
        /// <summary>
        /// Center of the position
        /// </summary>
        public override float RadiusSize { get { return R; } }
        public override float Direction { get { return 0; } }
        public float Width { get { return W; } }
        public float Height { get { return H; } }
        public float Radius { get { return R; } }
        readonly private ZoneEditor.RegionData.Shape mShape;
        private float W;
        private float H;
        private float R;
        private ViewTrigger mViewTrigger;
        private bool mAllTriggerOver = false;
        private bool mAllTriggerNoneAlive = false;

        private List<AbstractSpawnTrigger> mSpawnTriggers = new List<AbstractSpawnTrigger>();


        public ZoneRegion(InstanceZone zone, ZoneEditor.RegionData data)
            : base(zone, data)
        {
            this.mShape = data.RegionType;
            this.W = data.W;
            this.H = data.H;
            this.R = data.Radius;
            switch (mShape)
            {
                case ZoneEditor.RegionData.Shape.RECTANGLE:
                    this.mViewTrigger = new ViewTriggerRectCenter(Parent, W, H);
                    break;
                case ZoneEditor.RegionData.Shape.STRIP:
                    this.mViewTrigger = new ViewTriggerStripCenter(Parent, W, H, data.StripDirection);
                    break;
                case ZoneEditor.RegionData.Shape.ROUND:
                default:
                    this.mViewTrigger = new ViewTriggerRoundCenter(Parent, R);
                    break;
            }
            this.mViewTrigger.setListener(this);
        }

        public override TVector2 getRandomPos(Random random)
        {
            if (mShape == ZoneEditor.RegionData.Shape.ROUND)
            {
                float angle = (float)(random.NextDouble() * CMath.PI_MUL_2);
                float len = (float)(random.NextDouble() * R);
                float x = X + (float)(Math.Cos(angle) * len);
                float y = Y + (float)(Math.Sin(angle) * len);
                return new TVector2(x, y);
            }
            else
            {
                float x = X + (float)((-W / 2f) + random.NextDouble() * W);
                float y = Y + (float)((-H / 2f) + random.NextDouble() * H);
                return new TVector2(x, y);
            }
        }

        public bool IsUnitInRegion(InstanceZoneObject unit)
        {
            return Collider.Object_BlockBody_TouchRound(unit, this.get_x(), this.get_y(), this.RadiusSize); ;
        }

        public void keepInRegion(ref float x, ref float y)
        {
            switch (mShape)
            {
                case ZoneEditor.RegionData.Shape.RECTANGLE:
                    x = CMath.getInRange(x, this.X - this.W / 2, this.X + this.W / 2);
                    y = CMath.getInRange(y, this.Y - this.H / 2, this.Y + this.H / 2);
                    break;
                case ZoneEditor.RegionData.Shape.ROUND:
                    float d = MathVector.getDistance(x, y, this.X, this.Y);
                    if (d > this.R)
                    {
                        float a = MathVector.getDegree(x, y, this.X, this.Y);
                        MathVector.movePolar(ref x, ref y, a, d - this.R);
                    }
                    break;
            }
        }

        protected override void Disposing()
        {
            base.Disposing();
            mViewTrigger.Dispose();
            foreach (var e in mSpawnTriggers)
            {
				e.OnLastObjectRemoved -= onTriggerLastObjectRemoved;
                e.Dispose();
            }
            mSpawnTriggers.Clear();
            mOnUnitEnter = null;
            mOnUnitLeave = null;
            mOnZoneUpdate = null;
            mOnSpawnOver = null;
        }

        internal void AddSpawnTrigger(AbstractSpawnTrigger trigger)
        {
            trigger.OnLastObjectRemoved += onTriggerLastObjectRemoved;
            mSpawnTriggers.Add(trigger);
            mAllTriggerOver = false;
        }
        private void onTriggerLastObjectRemoved(ZoneRegion region, AbstractSpawnTrigger trigger, InstanceZoneObject unit)
        {
            if (mOnSpawnOver != null && IsSpawnOver)
            {
                mOnSpawnOver.Invoke(this);
            }
        }

        /// <summary>
        /// 获取此区域绑定的怪物刷新点
        /// </summary>
        /// <returns></returns>
        public IEnumerable<AbstractSpawnTrigger> GetSpawnTriggers()
        {
            return mSpawnTriggers;
        }
        /// <summary>   
        /// 获取此区域绑定的怪物刷新点
        /// </summary>
        /// <param name="name"></param>
        /// <returns></returns>
        public AbstractSpawnTrigger GetSpawnTrigger(string name)
        {
            for (int i = mSpawnTriggers.Count - 1; i >= 0; --i)
            {
                AbstractSpawnTrigger tg = mSpawnTriggers[i];
                if (string.Equals(tg.Name, name))
                {
                    return tg;
                }
            }
            return null;
        }
        /// <summary>
        /// 检测是否所有刷怪点都结束
        /// </summary>
        public bool IsSpawnOver
        {
            get
            {
                if (!mAllTriggerOver)
                {
                    for (int i = mSpawnTriggers.Count - 1; i >= 0; --i)
                    {
                        AbstractSpawnTrigger tg = mSpawnTriggers[i];
                        if (!tg.IsSpawnOver)
                        {
                            return false;
                        }
                    }
                    mAllTriggerOver = true;
                }
                return true;
            }
        }
        /// <summary>
        /// 检测是否所有刷怪点都无存活
        /// </summary>
        public bool IsSpawnNoneAlive
        {
            get
            {
                if (!mAllTriggerNoneAlive)
                {
                    for (int i = mSpawnTriggers.Count - 1; i >= 0; --i)
                    {
                        AbstractSpawnTrigger tg = mSpawnTriggers[i];
                        if (!tg.IsSpawnOver)
                        {
                            return false;
                        }
                        if (tg.AliveCount > 0)
                        {
                            return false;
                        }
                    }
                    mAllTriggerNoneAlive = true;
                }
                return true;
            }
        }

        internal override void update()
        {
            base.update();

            if (Enable && (mOnUnitEnter != null || mOnUnitLeave != null || mEnterOnceList.Count > 0 || mLeaveOnceList.Count > 0))
            {
                mViewTrigger.Enable = true;
                mViewTrigger.onLookUpdate(X, Y);
            }
            else
            {
                mViewTrigger.Enable = false;
            }

            if (Enable && mOnZoneUpdate != null)
            {
                mOnZoneUpdate.Invoke(this);
            }
        }

        void ViewTrigger.ViewTriggerListener.onObjectEnterView(ViewTrigger src, InstanceZoneObject obj)
        {
            if (mOnUnitEnter != null)
            {
                mOnUnitEnter.Invoke(this, obj as InstanceUnit);
            }
            mEnterOnceList.Invoke(this, obj as InstanceUnit);
        }

        void ViewTrigger.ViewTriggerListener.onObjectLeaveView(ViewTrigger src, InstanceZoneObject obj)
        {
            if (mOnUnitLeave != null)
            {
                mOnUnitLeave.Invoke(this, obj as InstanceUnit);
            }
            mLeaveOnceList.Invoke(this, obj as InstanceUnit);
        }
        bool ViewTrigger.ViewTriggerListener.select(ViewTrigger src, InstanceZoneObject obj)
        {
            return obj is InstanceUnit;
        }

        public void addInRegionViewed(InstanceUnit unit)
        {
            if (mViewTrigger != null)
            {
                mViewTrigger.addViewed(unit);
            }
        }

        /// <summary>
        /// 获得所有由此刷新点产生的单位
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="list"></param>
        public void getSpawnedObjectsInRegion<T>(List<T> list) where T : InstanceZoneObject
        {
            foreach (var spawn in mSpawnTriggers)
            {
                spawn.getSpawnedObjects<T>(list);
            }
        }


        //[Obsolete]
        //private List<T> getObjectsInRegion<T>(ObjectAoiStatus aoi) where T : InstanceZoneObject
        //{
        //    if (this.RegionType == ZoneEditor.RegionData.Shape.RECTANGLE)
        //    {
        //        return Parent.getObjectsRectRange<T>(
        //            Collider.Object_Pos_IncludeInRect,
        //            this.X, this.Y, this.Width, this.Height , aoi);
        //    }
        //    else
        //    {
        //        return Parent.getObjectsRoundRange<T>(
        //            Collider.Object_Pos_IncludeInRound,
        //            this.X, this.Y, this.Radius, aoi);
        //    }
        //}

        public void getObjectsInRegion<T>(List<T> list, ObjectAoiStatus aoi = null) where T : InstanceZoneObject
        {
            if (this.RegionType == ZoneEditor.RegionData.Shape.RECTANGLE)
            {
                Parent.getObjectsRectRange<T>(
                    Collider.Object_Pos_IncludeInRect,
                    this.X - this.Width/2, this.Y- this.Height/2, this.X + this.Width/2, this.Y + this.Height/2,
                    list, aoi);
            }
            else
            {
                Parent.getObjectsRoundRange<T>(
                    Collider.Object_Pos_IncludeInRound,
                    this.X, this.Y, this.Radius,
                    list, aoi);
            }
        }

        public int getObjectsCountInRegion<T>(ObjectAoiStatus aoi = null) where T : InstanceZoneObject
        {
            if (this.RegionType == ZoneEditor.RegionData.Shape.RECTANGLE)
            {
                return Parent.getObjectsCountRectRange<T>(Collider.Object_Pos_IncludeInRect, 
					this.X - this.Width / 2, this.Y - this.Height / 2, this.X + this.Width / 2, this.Y + this.Height / 2, aoi);
            }
            else
            {
                return Parent.getObjectsCountRoundRange<T>(
                    Collider.Object_Pos_IncludeInRound,
                    this.X, this.Y, this.Radius, aoi);
            }
        }

        //[Obsolete]
        //private List<T> getObjectsInRegion<T>(Select<T> select, ObjectAoiStatus aoi) where T : InstanceZoneObject
        //{
        //    List<T> list = getObjectsInRegion<T>();
        //    for (int i = list.Count - 1; i >= 0; --i)
        //    {
        //        if (!select.Invoke(list[i]))
        //        {
        //            list.RemoveAt(i);
        //        }
        //    }
        //    return list;
        //}

        public int getObjectsCountInRegion<T>(Select<T> select , ObjectAoiStatus aoi = null) where T : InstanceZoneObject
        {
            int ret = 0;
            using (var list = ListObjectPool<T>.AllocAutoRelease())
            {
                getObjectsInRegion<T>(list , aoi);
                for (int i = list.Count - 1; i >= 0; --i)
                {
                    if (select.Invoke(list[i]))
                    {
                        ret++;
                    }
                }
            }
            return ret;
        }

        //--------------------------------------------------------------------------------------------------------------
        #region Delegate

        /// <summary>
        /// 某单位进入此区域
        /// </summary>
        /// <param name="region"></param>
        /// <param name="obj"></param>
        public delegate void UnitEnterHandler(ZoneRegion region, InstanceUnit obj);

        /// <summary>
        /// 某单位离开此区域
        /// </summary>
        /// <param name="region"></param>
        /// <param name="obj"></param>
        public delegate void UnitLeaveHandler(ZoneRegion region, InstanceUnit obj);

        /// <summary>
        /// 区域更新
        /// </summary>
        /// <param name="region"></param>
        public delegate void ZoneUpdateHandler(ZoneRegion region);

        /// <summary>
        /// 刷新点刷新完毕
        /// </summary>
        /// <param name="region"></param>
        public delegate void SpawnOverHandler(ZoneRegion region);

        private UnitEnterHandler mOnUnitEnter;
        private UnitLeaveHandler mOnUnitLeave;
        private ZoneUpdateHandler mOnZoneUpdate;
        private SpawnOverHandler mOnSpawnOver;

        public event UnitEnterHandler OnUnitEnter { add { mOnUnitEnter += value; } remove { mOnUnitEnter -= value; } }
        public event UnitLeaveHandler OnUnitLeave { add { mOnUnitLeave += value; } remove { mOnUnitLeave -= value; } }
        public event ZoneUpdateHandler OnZoneUpdate { add { mOnZoneUpdate += value; } remove { mOnZoneUpdate -= value; } }
        public event SpawnOverHandler OnSpawnOver { add { mOnSpawnOver += value; } remove { mOnSpawnOver -= value; } }

        //--------------------------------------------------------------------------------------------------------------
        private struct OnceEvent : IOnceInvoke
        {
            public InstanceUnit unit { get; private set; }
            public bool IsDone { get { return done || !unit.Enable; } }
            private UnitEnterHandler enter_handler;
            private UnitLeaveHandler leave_handler;
            private bool done;

            public OnceEvent(InstanceUnit unit, UnitEnterHandler enter, UnitLeaveHandler leave)
            {
                this.unit = unit;
                this.enter_handler = enter;
                this.leave_handler = leave;
                this.done = false;
            }
            public void Invoke(ZoneRegion region)
            {
                if (enter_handler != null) this.enter_handler.Invoke(region, unit);
                if (leave_handler != null) this.leave_handler.Invoke(region, unit);
                this.enter_handler = null;
                this.leave_handler = null;
                this.done = true;
            }
        }
        private class OnceInvokeList : OnceInvokeList<OnceEvent>
        {
            public void Invoke(ZoneRegion region, InstanceUnit unit)
            {
                base.Invoke((e) =>
                {
                    if (e.unit == unit)
                    {
                        e.Invoke(region);
                    }
                });
            }
        }
        private OnceInvokeList mEnterOnceList = new OnceInvokeList();
        private OnceInvokeList mLeaveOnceList = new OnceInvokeList();

        /// <summary>
        /// 监听单位进入一次，触发器只触发一次
        /// </summary>
        /// <param name="unit"></param>
        /// <param name="handler"></param>
        public void ListenUnitEnterOnce(InstanceUnit unit, UnitEnterHandler handler)
        {
            mEnterOnceList.Add(new OnceEvent(unit, handler, null));
        }
        /// <summary>
        /// 监听单位离开一次，触发器只触发一次
        /// </summary>
        /// <param name="unit"></param>
        /// <param name="handler"></param>
        public void ListenUnitLeaveOnce(InstanceUnit unit, UnitLeaveHandler handler)
        {
            mLeaveOnceList.Add(new OnceEvent(unit, null, handler));
        }

        //--------------------------------------------------------------------------------------------------------------

        protected override void clearEvents()
        {
            base.clearEvents();
            mEnterOnceList.Clear();
            mLeaveOnceList.Clear();
            mOnUnitEnter = null;
            mOnUnitLeave = null;
            mOnZoneUpdate = null;
            mOnSpawnOver = null;
        }

        #endregion


    }

    public class ZoneWayPoint : InstanceFlag
    {
        public override float RadiusSize { get { return 1; } }
        public override float Direction { get { return 0; } }

        private IList<ZoneWayPoint> mNexts = new List<ZoneWayPoint>();

        public ZoneWayPoint(InstanceZone zone, ZoneEditor.PointData data)
            : base(zone, data)
        {
        }

        public override TVector2 getRandomPos(Random random)
        {
            return new TVector2(X, Y);
        }
        internal override void update()
        {
            base.update();
        }
        internal void AddNext(ZoneWayPoint next)
        {
            mNexts.Add(next);
        }

        public ZoneWayPoint GetRandomNext(ZoneWayPoint prev = null)
        {
            if (mNexts.Count > 0)
            {
                if (mNexts.Count == 1)
                {
                    return mNexts[0];
                }
                int nexti = Parent.RandomN.Next(0, mNexts.Count);
                for (int i = 0; i < mNexts.Count; i++)
                {
                    int idx = CMath.cycNum(nexti, i, mNexts.Count);
                    if (mNexts[idx] != prev)
                    {
                        return mNexts[idx];
                    }
                }
                return mNexts[nexti];
            }
            return null;
        }

        public ZoneWayPoint GetNext()
        {
            if (mNexts.Count > 0)
            {
                return mNexts[0];
            }
            return null;
        }

        public ZoneWayPoint GetTail()
        {
            if (mNexts.Count == 0)
            {
                return this;
            }
            ZoneWayPoint wp = GetNext();
            while (true)
            {
                ZoneWayPoint next = wp.GetNext();
                if (next != null)
                {
                    wp = next;
                }
                else
                {
                    break;
                }
            }
            return wp;
        }
    }

    public class ZoneDecoration : InstanceFlag
    {
        public override float RadiusSize { get { return this.R; } }
        public override float Direction { get { return this.StripDirection; } }

        readonly private ZoneEditor.DecorationData.Shape mShape;
        private float W;
        private float H;
        private float R;
        private float StripDirection;
        private bool Blockable;
        private int BlockValue;

        public ZoneDecoration(InstanceZone zone, ZoneEditor.DecorationData data)
            : base(zone, data)
        {
            this.mShape = data.RegionType;
            this.W = data.W;
            this.H = data.H;
            this.R = data.Radius;
            this.StripDirection = data.StripDirection;
            this.Blockable = data.Blockable;
            this.BlockValue = data.BlockValue;
            this.OnFlagEnabled += this.OnEnabled;
            this.OnFlagDisabled += this.OnDisabled;
            if (Blockable)
            {
                this.OnFlagEnabled += this.OnTerrainEnabled;
                this.OnFlagDisabled += this.OnTerrainDisabled;
            }
        }

        internal override void update()
        {
            base.update();
        }

        public override TVector2 getRandomPos(Random random)
        {
            if (mShape == ZoneEditor.DecorationData.Shape.ROUND)
            {
                float angle = (float)(random.NextDouble() * CMath.PI_MUL_2);
                float len = (float)(random.NextDouble() * R);
                float x = X + (float)(Math.Cos(angle) * len);
                float y = Y + (float)(Math.Sin(angle) * len);
                return new TVector2(x, y);
            }
            else
            {
                float x = X + (float)((-W / 2f) + random.NextDouble() * W);
                float y = Y + (float)((-H / 2f) + random.NextDouble() * H);
                return new TVector2(x, y);
            }
        }
        private void OnEnabled(InstanceFlag flag)
        {
            Parent.queueEvent(new DecorationChangedEvent(Name, true));
        }
        private void OnDisabled(InstanceFlag flag)
        {
            Parent.queueEvent(new DecorationChangedEvent(Name, false));
        }

        #region FillTerrain

        private void OnTerrainEnabled(InstanceFlag flag)
        {
            this.FillTerrain(fill_Terrain_value);
        }
        private void OnTerrainDisabled(InstanceFlag flag)
        {
            this.FillTerrain(fill_Terrain_reset);
        }
        private void fill_Terrain_value(int bx, int by)
        {
            Parent.PathFinder.TryFillTerrain(bx, by, BlockValue);
        }
        private void fill_Terrain_reset(int bx, int by)
        {
            Parent.PathFinder.TryFillTerrain(bx, by, Parent.TerrainSrc.TerrainMatrix[bx, by]);
        }
        protected void FillTerrain(AstarManhattan.ForEachTerrainAction fillAction)
        {
            var mmap = Parent.PathFinder.MMap;
            switch (this.mShape)
            {
                case ZoneEditor.DecorationData.Shape.RECTANGLE:
                    AstarManhattan.ForEachTerrainRect(mmap, X - W / 2, Y - H / 2, W, H, fillAction);
                    break;
                case ZoneEditor.DecorationData.Shape.ROUND:
                    AstarManhattan.ForEachTerrainEllipse(mmap, X - W / 2, Y - H / 2, W, H, fillAction);
                    break;
                case ZoneEditor.DecorationData.Shape.STRIP:
                    TLine2 line = new TLine2(X, Y, X, Y);
                    MathVector.movePolarExt(ref line.p, StripDirection, -H / 2);
                    MathVector.movePolarExt(ref line.q, StripDirection, +H / 2);
                    AstarManhattan.ForEachTerrainStripWidth(mmap, line.p.X, line.p.Y, line.q.X, line.q.Y, W / 2, fillAction);
                    break;
            }
            Parent.PathFinder.BeginFindPath();
        }

        public bool TouchBlock(float x, float y)
        {
            if (Blockable && Enable && Parent.PathFinder.MMap.TestBlockValue(this.BlockValue))
            {
                int bx = (((int)x) / Parent.TerrainSrc.GridCellW);
                int by = (((int)y) / Parent.TerrainSrc.GridCellH);
                var mmap = Parent.PathFinder.MMap;
                switch (this.mShape)
                {
                    case ZoneEditor.DecorationData.Shape.RECTANGLE:
                        return AstarManhattan.ForEachTerrainRect(mmap, X - W / 2, Y - H / 2, W, H,
                            (cx, cy) => { return cx == bx && cy == by; });
                    case ZoneEditor.DecorationData.Shape.ROUND:
                        return AstarManhattan.ForEachTerrainEllipse(mmap, X - W / 2, Y - H / 2, W, H,
                            (cx, cy) => { return cx == bx && cy == by; });
                    case ZoneEditor.DecorationData.Shape.STRIP:
                        TLine2 line = new TLine2(X, Y, X, Y);
                        MathVector.movePolarExt(ref line.p, StripDirection, -H / 2);
                        MathVector.movePolarExt(ref line.q, StripDirection, +H / 2);
                        return AstarManhattan.ForEachTerrainStripWidth(mmap, line.p.X, line.p.Y, line.q.X, line.q.Y, W / 2,
                            (cx, cy) => { return cx == bx && cy == by; });
                }
            }
            return false;
        }

        #endregion

    }

    public class ZoneArea : InstanceFlag
    {
        public override float RadiusSize { get { return this.R; } }
        public override float Direction { get { return 0; } }
        public int CurrentMapNodeValue { get; private set; }

        private float W;
        private float H;
        private float R;

        public ZoneArea(InstanceZone zone, ZoneEditor.AreaData data)
            : base(zone, data)
        {
            this.W = data.W;
            this.H = data.H;
            this.R = data.W / 2;
        }

        internal void BindMapBlock(AreaData data)
        {
            //var current_node = Parent.PathFinder.GetMapNodeByPos(X, Y);
            //if (current_node != null)
            {
                this.CurrentMapNodeValue = data.Color;
                var list = Parent.TerrainAreaGenerator.GetContinuousMapNode(X, Y, W / 2, H / 2);
                foreach (var index in list)
                {
                    var node = Parent.PathFinder.GetMapNode(index.BX, index.BY) as ZoneMapNode;
                    if (node != null)
                    {
                        node.SetServerArea(this);
                    }
                }
            }
        }

        public override TVector2 getRandomPos(Random random)
        {
            return new TVector2(X, Y);
        }

        internal void do_onUnitEnter(InstanceZoneObject obj)
        {
            if (obj is InstanceUnit)
            {
                if (mOnUnitEnter != null) mOnUnitEnter.Invoke(this, obj as InstanceUnit);
                if (mEnterOnceList.Count > 0) mEnterOnceList.Invoke(this, obj as InstanceUnit);
            }
        }
        internal void do_onUnitLeave(InstanceZoneObject obj)
        {
            if (obj is InstanceUnit)
            {
                if (mOnUnitLeave != null) mOnUnitLeave.Invoke(this, obj as InstanceUnit);
                if (mLeaveOnceList.Count > 0) mLeaveOnceList.Invoke(this, obj as InstanceUnit);
            }
        }

        //----------------------------------------------------------------------------
        #region Delegate


        /// <summary>
        /// 某单位进入此区域
        /// </summary>
        /// <param name="area"></param>
        /// <param name="obj"></param>
        public delegate void UnitEnterHandler(ZoneArea area, InstanceUnit obj);

        /// <summary>
        /// 某单位离开此区域
        /// </summary>
        /// <param name="area"></param>
        /// <param name="obj"></param>
        public delegate void UnitLeaveHandler(ZoneArea area, InstanceUnit obj);


        private UnitEnterHandler mOnUnitEnter;
        private UnitLeaveHandler mOnUnitLeave;

        public event UnitEnterHandler OnUnitEnter { add { mOnUnitEnter += value; } remove { mOnUnitEnter -= value; } }
        public event UnitLeaveHandler OnUnitLeave { add { mOnUnitLeave += value; } remove { mOnUnitLeave -= value; } }


        //----------------------------------------------------------------------------
        private struct OnceEvent : IOnceInvoke
        {
            public InstanceUnit unit { get; private set; }
            public bool IsDone { get { return done || !unit.Enable; } }

            private UnitEnterHandler enter_handler;
            private UnitLeaveHandler leave_handler;
            private bool done;

            public OnceEvent(InstanceUnit unit, UnitEnterHandler enter, UnitLeaveHandler leave)
            {
                this.unit = unit;
                this.enter_handler = enter;
                this.leave_handler = leave;
                this.done = false;
            }
            public void Invoke(ZoneArea area)
            {
                if (enter_handler != null) this.enter_handler.Invoke(area, unit);
                if (leave_handler != null) this.leave_handler.Invoke(area, unit);
                this.enter_handler = null;
                this.leave_handler = null;
                this.done = true;
            }
        }
        private class OnceInvokeList : OnceInvokeList<OnceEvent>
        {
            public void Invoke(ZoneArea area, InstanceUnit unit)
            {
                base.Invoke((e) =>
                {
                    if (e.unit == unit)
                    {
                        e.Invoke(area);
                    }
                });
            }
        }
        private OnceInvokeList mEnterOnceList = new OnceInvokeList();
        private OnceInvokeList mLeaveOnceList = new OnceInvokeList();

        /// <summary>
        /// 监听单位进入一次，触发器只触发一次
        /// </summary>
        /// <param name="unit"></param>
        /// <param name="handler"></param>
        public void ListenUnitEnterOnce(InstanceUnit unit, UnitEnterHandler handler)
        {
            mEnterOnceList.Add(new OnceEvent(unit, handler, null));
        }
        /// <summary>
        /// 监听单位离开一次，触发器只触发一次
        /// </summary>
        /// <param name="unit"></param>
        /// <param name="handler"></param>
        public void ListenUnitLeaveOnce(InstanceUnit unit, UnitLeaveHandler handler)
        {
            mLeaveOnceList.Add(new OnceEvent(unit, null, handler));
        }

        //----------------------------------------------------------------------------

        protected override void clearEvents()
        {
            base.clearEvents();
            mEnterOnceList.Clear();
            mLeaveOnceList.Clear();
            mOnUnitEnter = null;
            mOnUnitLeave = null;
        }


        #endregion
        //----------------------------------------------------------------------------

    }
}