using CommonAI.Zone.ZoneEditor;
using CommonAI.ZoneClient;
using CommonLang;
using System;
using CommonLang.Vector;
using CommonAI.Zone;
using System.Collections.Generic;
using XmdsCommon.Plugin;
using CommonAI.Zone.Helper;

namespace XmdsCommon.ZoneClient
{
    public class HZZoneLayer : ZoneLayer
    {
        private List<ZoneEditorArea> mSafeAreaList;

        public HZZoneLayer(EditorTemplates dataroot, ILayerClient client)
            : base(dataroot, client)
        {
            this.LayerInit += HZZoneLayer_LayerInit;
        }

        private void HZZoneLayer_LayerInit(ZoneLayer layer)
        {
            //扫出所有安全区域.

            ICollection<ZoneFlag> list = layer.Flags;
            if (list == null)
            {
                return;
            }

            mSafeAreaList = new List<ZoneEditorArea>();
            ZoneEditorArea zea = null;

            foreach (ZoneFlag e in list)
            {
                if (e is ZoneEditorArea)
                {
                    zea = e as ZoneEditorArea;

                    if (zea.CurrentMapNodeValue == XmdsMapBlock.BLOCK_VALUE_SAFE)
                    {
                        mSafeAreaList.Add(zea);
                    }
                }
            }
        }

        public override bool IsCanPickItem(ZoneActor owner, ZoneItem item)
        {
            if (item == null)
            {
                return false;
            }
            if (IsTeamPickableItem(owner, item))
            {
                return true;
            }
            if (IsPickableItem(owner, item))
            {
                return true;
            }
            return false;
        }

        /// <summary>
        /// 获取当前可检取道具
        /// </summary>
        /// <param name="owner"></param>
        /// <returns></returns>
        /**
        public override ZoneItem GetNearPickableItem(ZoneActor owner)
        {
            ZoneItem ret = null;
            ForEachNearObjects<ZoneItem>(owner.X, owner.Y, (ZoneItem item, ref bool cancel) =>
            {
                if (IsTeamPickableItem(owner, item))
                {
                    ret = item;
                    cancel = true;
                }
            });
            if (ret != null)
            {
                return ret;
            }
            ForEachNearObjects<ZoneItem>(owner.X, owner.Y, (ZoneItem item, ref bool cancel) =>
            {
                if (IsPickableItem(owner, item))
                {
                    ret = item;
                    cancel = true;
                }
            });
            return ret;
        }
        **/
        
        public virtual bool IsTeamPickableItem(ZoneActor owner, ZoneItem item, bool no_touch = false)
        {
            if (no_touch || item.Info.Pickable && (item.Info.DropForAll || item.Force == owner.Force))
            {
                if (CMath.intersectRound(item.X, item.Y, item.Info.BodySize, owner.X, owner.Y, owner.Info.BodySize))
                {
                    XmdsCommon.Message.DropItem di = item.SyncInfo.ExtData as XmdsCommon.Message.DropItem;
                    if (di == null)
                    {
                        return true;
                    }
                    else
                    {
                        //Mode 1 自由拾取 只检查自己背包
                        //Mode 2， 队伍背包，只检查队伍背包
                        //Mode 3， Roll点，只判断所有权
                        bool is_owner = false;
                        if (di.PlayerUUID != null)
                        {
                            for (int i = 0; i < di.PlayerUUID.Count; i++)
                            {
                                if (owner.PlayerUUID == di.PlayerUUID[i])
                                {
                                    is_owner = true;
                                    break;
                                }
                            }
                        }

                        if (is_owner)//有归属者.
                        {
                            if (di.Mode == 2)
                            {
                                return true;
                            }
                            else
                            {
                                return false;
                            }
                        }
                        else
                        {
                            if (item.PassTimeMS >= di.ProtectTime)
                            {
                                return true;
                            }
                            else
                            {
                                return false;
                            }
                        }
                    }
                }
            }
            return false;
        }

        public override bool IsPickableItem(ZoneActor owner, ZoneItem item, bool no_touch = false)
        {
            if (!item.Info.OnlyForShow && (item.Info.DropForAll || item.Force == owner.Force))
            {
                if (no_touch || CMath.intersectRound(item.X, item.Y, item.Info.BodySize, owner.X, owner.Y, owner.Info.BodySize))
                {
                    XmdsCommon.Message.DropItem di = item.SyncInfo.ExtData as XmdsCommon.Message.DropItem;
                    if (di == null)
                    {
                        return true;
                    }
                    else
                    {
                        bool is_owner = false;
                        if (di.PlayerUUID != null)
                        {
                            for (int i = 0; i < di.PlayerUUID.Count; i++)
                            {
                                if (owner.PlayerUUID == di.PlayerUUID[i])
                                {
                                    is_owner = true;
                                    break;
                                }
                            }
                        }

                        if (is_owner)
                        {
                            return true;
                        }
                        else
                        {
                            //if (item.PassTimeMS >= di.ProtectTime）
                            if (item.PassTimeMS >= di.ProtectTime || item.SyncInfo.ItemExpireTimeMS == int.MaxValue) //edited by vajre 用于跨服拾取别人的装备
                            {
                                return true;
                            }
                            else
                            {
                                return false;
                            }
                        }
                    }
                }
            }
            return false;
        }

        public bool IsInSafeArea(ZoneUnit src)
        {
            var sa = GetArea(src.X, src.Y);
            //var sa = mUnit.CurrentArea;
            if (sa != null && sa.CurrentMapNodeValue == XmdsMapBlock.BLOCK_VALUE_SAFE)
            {
                return true;
            }
            else
            {
                return false;
            }
        }


        public override bool IsAttackable(ZoneUnit src, ZoneUnit target, SkillTemplate.CastTarget expectTarget)
        {
            //绝对中立阵营，不能被选为攻击目标.
            if (target.Force == 0 || target.HP <= 0)
            {
                return false;
            }
            switch (expectTarget)
            {
                case SkillTemplate.CastTarget.Enemy:
                    {
                        bool isEnemy = (src.Virtual as XmdsClientVirtual.XmdsClientVirtual).IsEnemy(target);
                        if (src.Info.UType == UnitInfo.UnitType.TYPE_PLAYER && target.Info.UType == UnitInfo.UnitType.TYPE_PLAYER)
                        {
                            if (IsInSafeArea(src) || IsInSafeArea(target))
                            {
                                return false;
                            }
                            else
                            {
                                return isEnemy;
                            }
                        }
                        else
                        {
                            return isEnemy;
                        }
                    }
                case SkillTemplate.CastTarget.PetForMaster:
                    if (src.Info.UType == UnitInfo.UnitType.TYPE_PET)
                    {
                        return (src != target) && (src.Force == target.Force);
                    }
                    return false;
                case SkillTemplate.CastTarget.Alias:
                case SkillTemplate.CastTarget.AlliesExcludeSelf:
                    return (src != target) && (src.Virtual as XmdsClientVirtual.XmdsClientVirtual).IsAllies(target);
                case SkillTemplate.CastTarget.AlliesIncludeSelf:
                    return (src.Virtual as XmdsClientVirtual.XmdsClientVirtual).IsAllies(target);
                case SkillTemplate.CastTarget.EveryOne:
                    return true;
                case SkillTemplate.CastTarget.EveryOneExcludeSelf:
                    return (src != target);
                case SkillTemplate.CastTarget.Self:
                    return src == target;
				case SkillTemplate.CastTarget.EnemyAndSelf:
					{
						if (src == target)
						{
							return true;
						}
						else
						{
							bool isEnemy = (src.Virtual as XmdsClientVirtual.XmdsClientVirtual).IsEnemy(target);
							if (src.Info.UType == UnitInfo.UnitType.TYPE_PLAYER && target.Info.UType == UnitInfo.UnitType.TYPE_PLAYER)
							{
								if (IsInSafeArea(src) || IsInSafeArea(target))
								{
									return false;
								}
								else
								{
									return isEnemy;
								}
							}
							else
							{
								return isEnemy;
							}
						}
						
					};
                case SkillTemplate.CastTarget.NA:
                default:
                    return false;
            }
        }

        /// <summary>
        /// 获得范围内符合目标条件的单位.
        /// </summary>
        /// <param name="owner"></param>
        /// <param name="range"></param>
        /// <param name="expect"></param>
        /// <returns></returns>
        public virtual ZoneUnit GetNearTarget<T>(ZoneActor owner, float range, SkillTemplate.CastTarget expect = SkillTemplate.CastTarget.Enemy) where T : XmdsClientVirtual.XmdsClientVirtual
        {
            ZoneUnit min = null;
            float min_len = range * range;

            ForEachNearObjects<ZoneUnit>(owner.X, owner.Y, range, (ZoneUnit u, ref bool cancel) =>
            {
                if (u.Virtual is T)
                {
                    if (IsAttackable(owner, u, expect))
                    {
                        float len = MathVector.getDistanceSquare(u.X, u.Y, owner.X, owner.Y) - u.Info.BodyHitSize;
                        if (min_len >= len)
                        {
                            min_len = len;
                            min = u;
                        }
                    }
                }
            });

            return min;
        }

        /// <summary>
        /// 获得范围内血量最少的单位.
        /// </summary>
        /// <param name="owner"></param>
        /// <param name="range"></param>
        /// <param name="expect"></param>
        /// <returns></returns>
        public virtual ZoneUnit GetWeakestTarget<T>(ZoneActor owner, float range, SkillTemplate.CastTarget expect = SkillTemplate.CastTarget.Enemy) where T : XmdsClientVirtual.XmdsClientVirtual
        {
            using (var list = ListObjectPool<ZoneUnit>.AllocAutoRelease())
            {
                ForEachNearObjects<ZoneUnit>(owner.X, owner.Y, range, (ZoneUnit u, ref bool cancel) =>
                {
                    if (u.Virtual is T)
                    {
                        if (CMath.intersectRound(owner.X, owner.Y, range, u.X, u.Y, u.Info.BodyHitSize))
                        {
                            if (IsAttackable(owner, u, expect))
                            {
                                list.Add(u);
                            }
                        }
                    }
                });
                if (list.Count > 0)
                {
                    list.Sort((a, b) =>
                    {
                        if (a.HP != b.HP)
                        {
                            return a.HP - b.HP;
                        }
                        float da = CMath.getDistanceSquare(a.X, a.Y, owner.X, owner.Y) - a.Info.BodyHitSize;
                        float db = CMath.getDistanceSquare(b.X, b.Y, owner.X, owner.Y) - b.Info.BodyHitSize;
                        return (int)(da - db);
                    });
                    return list[0];
                }
                else
                {
                    return null;
                }
            }
        }

        public virtual ZoneEditorArea GetNearSafeAreaPos(float x, float y)
        {
            if (mSafeAreaList == null)
            {
                return null;
            }

            ZoneEditorArea ret = null;

            if (mSafeAreaList.Count > 0)
            {
                mSafeAreaList.Sort((a, b) =>
                {
                    float da = CMath.getDistanceSquare(a.X, a.Y, x, y);
                    float db = CMath.getDistanceSquare(b.X, b.Y, x, y);
                    return (int)(da - db);
                });

                ret = mSafeAreaList[0];
            }
            return ret;
        }
    }

}