using System;
using System.Collections.Generic;
using System.Text;
using CommonLang;
using CommonAI.RTS;
using CommonLang.Vector;
using CommonAI.RTS.Manhattan;
using CommonAI.Zone.Helper;
using CommonAI.Data;

namespace CommonAI.Zone.Instance
{
    
    /// <summary>
    /// 生成单位的触发器
    /// </summary>
    public abstract class AbstractSpawnTrigger : Ability
    {
        public string Name { get; private set; }

        private ZoneRegion mAdded = null;

        private int mSpawnTimeIntervalMS;
        private int mDelayTimeMS = 0;
        private int mSpawnOnceCount;

        private LaunchEffect mSpawnEffect;

        private bool mSpawnWithoutAlive = true;
        private bool mResetOnWithoutAlive = false;

        private int mTotalSpawnCount = 0;
        private int mSpawnIndexer = 0;

        private int mLimitedSpawnCount = 0;
        private int mLimitedAliveCount = 0;

        private HashMap<InstanceZoneObject, InstanceZoneObject> mSpawnedUnits = new HashMap<InstanceZoneObject, InstanceZoneObject>();
        private string mUnitTag;

        private TimeTaskMS mTimeTask;

        private float mStartDirection = float.NaN;
        private TeamFormation mTeam;
        private TeamFormationGroup mTeamHelper;

		//绑定事件
		//protected List<String> Events = new List<String>();

		//--------------------------------------------------------------------------------------------------
		public AbstractSpawnTrigger(InstanceZone zone, string name)
            : base(zone)
        {
            this.Name = name;
        }

        public InstanceZone BindingZone { get { return mAdded.Parent; } }
        public ZoneRegion BindingRegion { get { return mAdded; } }

        public int OnceSpawnCount { get { return mSpawnOnceCount; } }
        public int LimitedSpawnCount { get { return mLimitedSpawnCount; } }
        public int LimitedAliveCount { get { return mLimitedAliveCount; } }

        /// <summary>
        /// 当前存活数量
        /// </summary>
        public virtual int AliveCount { get { return mSpawnedUnits.Count; } }
        public int SpawnIndexer { get { return mSpawnIndexer; } }
        public int TotalSpawnCount { get { return mTotalSpawnCount; } }
        public float StartDirection { get { return (!float.IsNaN(mStartDirection)) ? mStartDirection : (float)(Zone.RandomN.NextDouble() * CMath.PI_MUL_2); } }
        /// <summary>
        /// 是否已完成刷新
        /// </summary>
        public bool IsSpawnOver
        {
            get
            {
                if (mLimitedSpawnCount == 0)
                    return false;
                return (mTotalSpawnCount >= mLimitedSpawnCount);
            }
        }
        public bool IsWaitAlive
        {
            get
            {
                if (mLimitedAliveCount == 0)
                    return false;
                return (mSpawnedUnits.Count >= mLimitedAliveCount);
            }
        }

        /// <summary>
        /// 生产单位间隔时间
        /// </summary>
        /// <param name="interval"></param>
        public void setSpawnInterval(int interval)
        {
            this.mSpawnTimeIntervalMS = interval;
        }
        /// <summary>
        /// 设置每次产生个数
        /// </summary>
        /// <param name="count"></param>
        public void setSpawnCount(int count)
        {
            this.mSpawnOnceCount = count;
        }
        /// <summary>
        /// 设置出生特效
        /// </summary>
        /// <param name="effect"></param>
        public void setSpawnEffect(LaunchEffect effect)
        {
            this.mSpawnEffect = effect;
        }
        /// <summary>
        /// 单位产生绑定的标志
        /// </summary>
        /// <param name="tag"></param>
        public void setUnitTag(string tag)
        {
            this.mUnitTag = tag;
        }

        /// <summary>
        /// 只有当前怪物没有存活时才刷新
        /// </summary>
        /// <param name="without_alive"></param>
        public void setSpawnWithoutAlive(bool without_alive)
        {
            this.mSpawnWithoutAlive = without_alive;
        }

        /// <summary>
        /// 设置怪物存活最大上限
        /// </summary>
        /// <param name="count"></param>
        public void setLimitedAliveCount(int count)
        {
            this.mLimitedAliveCount = count;
        }

        /// <summary>
        /// 设置怪物最大产生数量
        /// </summary>
        /// <param name="count"></param>
        public void setLimitedSpawnCount(int count)
        {
            this.mLimitedSpawnCount = count;
        }

        /// <summary>
        /// 设置当前触发器禁止时间，就是多长时间后才起效。
        /// </summary>
        /// <param name="time"></param>
        public void setDelayTime(int time)
        {
            this.mDelayTimeMS = time;
        }

        public void setStartDirection(float direction)
        {
            if (direction >= 0)
            {
                this.mStartDirection = direction;
            }
        }

        public void setTeamFormation(TeamFormation team)
        {
            this.mTeam = team;
        }


        public void setResetOnWithoutAlive(bool flag)
        {
            this.mResetOnWithoutAlive = flag;
        }

        public void getSpawnedObjects<T>(List<T> list) where T : InstanceZoneObject
        {
            foreach (var o in mSpawnedUnits.Values)
            {
                if (o is T)
                {
                    list.Add(o as T);
                }
            }
        }

        /// <summary>
        /// 重置计时器
        /// </summary>
        public void reset()
        {
            mTotalSpawnCount = 0;
            mSpawnedUnits.Clear();
            if (mTimeTask != null)
            {
                mTimeTask.Reset();
            }
        }

        /// <summary>
        /// 绑定到区域
        /// </summary>
        /// <param name="region"></param>
        public void bindToRegion(ZoneRegion region)
        {
            if (mAdded == null)
            {
                InstanceZone zone = region.Parent;
                mAdded = region;
                mTimeTask = zone.AddTimeTask(mSpawnTimeIntervalMS, mDelayTimeMS, 0, onTimeSpawn);
                region.OnFlagDisabled += this.onRegionStop;
                region.OnFlagEnabled += this.onRegionStart;
                region.AddSpawnTrigger(this);
                if (!region.Enable)
                {
                    mTimeTask.Pause();
                }
                else
                {
                    //一开始就执行一次spawn
                    spawnOnce(mAdded);
                }             
            }
            else
            {
                throw new Exception("This Trigger already bind a region !!!");
            }
        }

        private void onRegionStart(InstanceFlag region)
        {
            //一开始就执行一次spawn
            spawnOnce(mAdded);

            mTimeTask.Resume();
        }
        private void onRegionStop(InstanceFlag region)
        {
            mTimeTask.Pause();
        }
        private void onTimeSpawn(TimeTaskMS task)
        {
            spawnOnce(mAdded);
        }

        private void spawnOnce(ZoneRegion region)
        {
            if (SpawnTemplateCount <= 0)
            {
                return;
            }
            if (mSpawnWithoutAlive && mSpawnedUnits.Count > 0)
            {
                return;
            }
            InstanceZone zone = region.Parent;
            if (mTeam != null)
            {
                if (mTeamHelper == null || mTeamHelper.Data != mTeam)
                {
                    mTeamHelper = new TeamFormationGroup(mTeam, region);
                }
                for (int i = mSpawnOnceCount - 1; i >= 0; --i)
                {
                    var pos = region.getRandomPos(zone.RandomN);
                    mTeamHelper.AddPos(pos.X, pos.Y, StartDirection);
                }
                mTeamHelper.ResetPos();
            }
            else
            {
                mTeamHelper = null;
            }

			

            for (int i = mSpawnOnceCount - 1; i >= 0; --i)
            {
                if (IsSpawnOver) { break; }
                if (IsWaitAlive) { break; }
                var pos = (mTeamHelper != null) ? mTeamHelper.PopPos() : null;
                var obj = SpawnObject(pos);
                this.mSpawnIndexer++;
				this.mTotalSpawnCount++;

				if (obj != null)
                {                    
                    this.mSpawnedUnits.Put(obj, obj);
                    obj.UnitTag = mUnitTag;
                    obj.OnObjectRemoved += removeSpawned;
                    OnObjectSpawned(obj);
                    if (mOnSpawnObject != null)
                    {
                        mOnSpawnObject.Invoke(region, this, obj);
                    }
                    if (mSpawnEffect != null)
                    {
                        zone.queueEvent(new AddEffectEvent(0 ,region.X, region.Y, region.Direction, mSpawnEffect));
                    }
                    if (IsSpawnOver)
                    {
                        if (mOnSpawnOver != null)
                        {
                            mOnSpawnOver.Invoke(region, this);
                        }
                    }
                }
            }
            if (mTeamHelper != null)
            {
                mTeamHelper.Clear();
            }
            if (mResetOnWithoutAlive)
            {
                this.mTimeTask.Pause();
            }
        }

        private void removeSpawned(InstanceZoneObject obj)
        {
            obj.OnObjectRemoved -= removeSpawned;
            obj = mSpawnedUnits.RemoveByKey(obj);
            if (obj != null)
            {
                OnSpawnedObjectRemoved(obj);
                if (IsSpawnOver && mSpawnedUnits.Count == 0)
                {
                    mTimeTask.Pause();
                    if (mOnLastObjectRemoved != null)
                    {
                        mOnLastObjectRemoved.Invoke(mAdded, this, obj);
                    }
                }
            }
            if (IsSpawnOver == false && mSpawnedUnits.Count == 0 && mResetOnWithoutAlive)
            {
                this.mTimeTask.Reset();
            }
        }

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

        public override void Dispose()
        {
            base.Dispose();
            mOnSpawnOver = null;
            mOnSpawnObject = null;
            mOnLastObjectRemoved = null;
        }

        public delegate void SpawnObjectHandler(ZoneRegion region, AbstractSpawnTrigger trigger, InstanceZoneObject unit);
        public delegate void SpawnOverHandler(ZoneRegion region, AbstractSpawnTrigger trigger);
        public delegate void SpawnLastObjectRemovedHandler(ZoneRegion region, AbstractSpawnTrigger trigger, InstanceZoneObject unit);

        private SpawnOverHandler mOnSpawnOver;
        private SpawnObjectHandler mOnSpawnObject;
        private SpawnLastObjectRemovedHandler mOnLastObjectRemoved;

        public event SpawnOverHandler OnSpawnOver { add { mOnSpawnOver += value; } remove { mOnSpawnOver -= value; } }
        public event SpawnObjectHandler OnSpawnUnit { add { mOnSpawnObject += value; } remove { mOnSpawnObject -= value; } }
        public event SpawnLastObjectRemovedHandler OnLastObjectRemoved { add { mOnLastObjectRemoved += value; } remove { mOnLastObjectRemoved -= value; } }

        #endregion

        //--------------------------------------------------------------------------------------------------
        #region ABSTRACT

        abstract public int SpawnTemplateCount { get; }

        /// <summary>
        /// 创建并生成一个单位
        /// </summary>
        /// <returns></returns>
        abstract protected InstanceZoneObject SpawnObject(IPositionObject pos);

        /// <summary>
        /// 当一个单位被生成
        /// </summary>
        /// <param name="obj"></param>
        abstract protected void OnObjectSpawned(InstanceZoneObject obj);

        /// <summary>
        /// 当被生成的单位被移除场景
        /// </summary>
        /// <param name="obj"></param>
        abstract protected void OnSpawnedObjectRemoved(InstanceZoneObject obj);

        #endregion
    }

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


    /// <summary>
    /// 生成单位的触发器
    /// </summary>
    public class SpawnUnitTrigger : AbstractSpawnTrigger
    {
        public struct SpawnUnitInfo
        {
            public UnitInfo Unit;
            public int Level;
            public float Percent;

            public SpawnUnitInfo(UnitInfo unit, int level, float percent)
            {
                this.Unit = unit;
                this.Level = level;
                this.Percent = percent;
            }
        }
        private List<SpawnUnitInfo> mSpawnUnitTemplates = new List<SpawnUnitInfo>();
        private HashMap<uint, InstanceUnit> mAlivedUnits = new HashMap<uint, InstanceUnit>();
        private ZoneWayPoint mStartPath = null;
        private int mStartPathMinHoldTimeMS, mStartPathMaxHoldTimeMS;
		private int mPeaceTime;
		private byte mUnitForceMin;
		private byte mUnitForceMax;
        private string mUnitName;

        public override int SpawnTemplateCount
        {
            get { return mSpawnUnitTemplates.Count; }
        }
        public override int AliveCount
        {
            get {
                if (mAlivedUnits.Count > 0)
                {
                    int count = 0;
                    foreach(var u in mAlivedUnits.Values)
                    {
                        if (!u.IsDead())
                        {
                            count++;
                        }
                    }
                    return count;
                }
                return 0;
            }
        }

        public SpawnUnitTrigger(InstanceZone zone, string name)
            : base(zone, name)
        {

        }

        /// <summary>
        /// 设置产生单位的Force
        /// </summary>
        /// <param name="force"></param>
        public void setUnitForce(byte forceMin, byte forceMax)
        {
            this.mUnitForceMin = forceMin;
			this.mUnitForceMax = forceMax;

		}
        /// <summary>
        /// 设置出生单位名字
        /// </summary>
        /// <param name="name"></param>
        public void setUnitName(string name)
        {
            this.mUnitName = name;
        }
        /// <summary>
        /// 添加单位模板
        /// </summary>
        /// <param name="info">将要产生的单位模板</param>
        /// <param name="level"></param>
        /// <param name="percent"></param>
        public void addUnitInfo(UnitInfo info, int level, float percent)
        {
            this.mSpawnUnitTemplates.Add(new SpawnUnitInfo(info, level, percent));
        }
        /// <summary>
        /// 添加单位模板
        /// </summary>
        /// <param name="templateID">将要产生的单位模板</param>
        /// <param name="level"></param>
        /// <param name="percent"></param>
        public void addUnitInfo(int templateID, int level = 0, float percent = 100f)
        {
            UnitInfo info = Zone.Templates.getUnit(templateID);
            if (info != null)
            {
                info = (UnitInfo)info.Clone();
                this.addUnitInfo(info, level, percent);
            }
        }

		//添加单位事件
		//public void addItemEvent(string eventId)
		//{
		//	this.Events.Add(eventId);
		//}

		/// <summary>
		/// 添加多个单位模板
		/// </summary>
		/// <param name="unitsTemplateID"></param>
		/// <param name="level"></param>
		public void addUnits(int[] unitsTemplateID, int level)
        {
            if (unitsTemplateID != null)
            {
                foreach (int id in unitsTemplateID)
                {
                    UnitInfo info = Zone.Templates.getUnit(id);
                    if (info != null)
                    {
                        info = (UnitInfo)info.Clone();
                        this.addUnitInfo(info, level, 100f);
                    }
                }
            }
        }
        /// <summary>
        /// 清除所有怪物模板
        /// </summary>
        public void clearTemplates()
        {
            mSpawnUnitTemplates.Clear();
        }

        /// <summary>
        /// 设置移动路线
        /// </summary>
        /// <param name="zone"></param>
        /// <param name="flagName"></param>
        /// <param name="minHoldTimeMS"></param>
        /// <param name="maxHoldTimeMS"></param>
        public ZoneWayPoint setStartPath(InstanceZone zone, string flagName, int minHoldTimeMS, int maxHoldTimeMS, int PeaceTime)
        {
            this.mStartPath = null;
            if (!string.IsNullOrEmpty(flagName))
            {
                InstanceFlag flag = zone.getFlag(flagName);
                if (flag is ZoneWayPoint)
                {
                    mStartPath = flag as ZoneWayPoint;
                    mStartPathMinHoldTimeMS = minHoldTimeMS;
                    mStartPathMaxHoldTimeMS = maxHoldTimeMS;
					mPeaceTime = PeaceTime;
				}
            }
            return mStartPath;
        }
        protected override InstanceZoneObject SpawnObject(IPositionObject pos)
        {
            InstanceZone zone = this.BindingZone;
            SpawnUnitInfo spawn = mSpawnUnitTemplates[SpawnIndexer % mSpawnUnitTemplates.Count];
            if (CUtils.RandomPercent(zone.RandomN, spawn.Percent))
            {
                IVector2 mpos = pos != null ? new TVector2(pos.X, pos.Y) : BindingRegion.getRandomPos(zone.RandomN);
                float direction = pos != null ? pos.Direction : this.StartDirection;
                UnitInfo info = spawn.Unit;
                int level = spawn.Level;
                InstanceUnit unit = zone.AddUnit(info,
                   mUnitName,
                   this.GetForce(),
                   level,
                   mpos.X, mpos.Y, direction);
                if (unit is IGuardUnit)
                {
                    IGuardUnit guard = unit as IGuardUnit;
                    guard.SetOrginPosition(mpos.X, mpos.Y);
                }
                return unit;
            }
            return null;
        }
        
		private byte GetForce()
		{
			if (this.mUnitForceMax > this.mUnitForceMin && this.mUnitForceMin >= 0)
			{
				return (byte)(GlobalData.gRandom.Next() % (this.mUnitForceMax - this.mUnitForceMin) + this.mUnitForceMin);
			}

			return this.mUnitForceMin;
		}

        protected override void OnObjectSpawned(InstanceZoneObject obj)
        {
            InstanceUnit unit = (obj as InstanceUnit);
            if (unit != null)
            {
                mAlivedUnits.Put(unit.ID, unit);
                unit.OnDead += unit_OnDead;
                if (mStartPath != null && (unit is IGuardUnit))
                {
                    unit.OnActivated += unit_OnActivated;
                }
            }
        }
        protected override void OnSpawnedObjectRemoved(InstanceZoneObject obj)
        {
            IGuardUnit guard = (obj as IGuardUnit);
            if (guard != null)
            {
                var unit = guard as InstanceUnit;
                mAlivedUnits.RemoveByKey(unit.ID);
                unit.OnDead -= unit_OnDead;
                unit.OnActivated -= unit_OnActivated;
            }
        }
        private void unit_OnDead(InstanceUnit unit, InstanceUnit attacker)
        {
            mAlivedUnits.RemoveByKey(unit.ID);
        }
        private void unit_OnActivated(InstanceUnit unit)
        {
            unit.OnActivated -= unit_OnActivated;
            if (unit is IGuardUnit)
            {
                IGuardUnit guard = unit as IGuardUnit;
                if (mStartPathMinHoldTimeMS != 0 || mStartPathMaxHoldTimeMS != 0)
                {
                    guard.PatrolWith(
                        mStartPath,
                        mStartPathMinHoldTimeMS,
                        mStartPathMaxHoldTimeMS,
						mPeaceTime);
                }
                else
                {
                    guard.AttackTo(mStartPath, mPeaceTime);
                }
            }
        }


    }

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

    /// <summary>
    /// 生成物品的触发器
    /// </summary>
    public class SpawnItemTrigger : AbstractSpawnTrigger
    {
        public struct SpawnItemInfo
        {
            public ItemTemplate Item;
            public float Percent;

            public SpawnItemInfo(ItemTemplate item, float percent)
            {
                this.Item = item;
                this.Percent = percent;
            }
        }

        private List<SpawnItemInfo> mSpawnUnitTemplates = new List<SpawnItemInfo>();
        private byte mUnitForce;
        private string mUnitName;

        public override int SpawnTemplateCount
        {
            get { return mSpawnUnitTemplates.Count; }
        }

        public SpawnItemTrigger(InstanceZone zone, string name)
            : base(zone, name)
        {

        }

        /// <summary>
        /// 设置产生单位的Force
        /// </summary>
        /// <param name="force"></param>
        public void setUnitForce(byte force)
        {
            this.mUnitForce = force;
        }
        /// <summary>
        /// 设置出生单位名字
        /// </summary>
        /// <param name="name"></param>
        public void setUnitName(string name)
        {
            this.mUnitName = name;
        }

        /// <summary>
        /// 添加单位模板
        /// </summary>
        /// <param name="info">将要产生的单位模板</param>
        public void addItemInfo(int templateID, float percent = 100f)
        {
            ItemTemplate info = Zone.Templates.getItem(templateID);
            if (info != null)
            {
                info = (ItemTemplate)info.Clone();
                mSpawnUnitTemplates.Add(new SpawnItemInfo(info, percent));
            }
        }

        /// <summary>
        /// 清除所有怪物模板
        /// </summary>
        public void clearTemplates()
        {
            mSpawnUnitTemplates.Clear();
        }


        protected override InstanceZoneObject SpawnObject(IPositionObject pos)
        {
            InstanceZone zone = this.BindingZone;
            SpawnItemInfo spawn = mSpawnUnitTemplates[SpawnIndexer % mSpawnUnitTemplates.Count];
            if (CUtils.RandomPercent(zone.RandomN, spawn.Percent))
            {
                IVector2 mpos = pos != null ? new TVector2(pos.X, pos.Y) : BindingRegion.getRandomPos(zone.RandomN);
                float direction = pos != null ? pos.Direction : base.StartDirection;
                ItemTemplate info = spawn.Item;
                info = (ItemTemplate)info.Clone();
                InstanceItem item = zone.AddItem(info, mUnitName, mpos.X, mpos.Y, direction, mUnitForce, mUnitName, null);
                return item;
            }
            return null;
        }

        protected override void OnObjectSpawned(InstanceZoneObject obj)
        {
        }
        protected override void OnSpawnedObjectRemoved(InstanceZoneObject obj)
        {
        }

    }

}