using UnityEngine;
using System.Collections;
using System.Collections.Generic;
using System.Xml;

public class BuffManager
{
	public enum State
	{
		Add,
		Remove,
	}

	public Dictionary<int, BuffData> dataDict;

	public BuffManager()
	{
		dataDict = new Dictionary<int, BuffData>();
		InitByXML("XML/Config/"+Language.GetCurrentLanguage()+"/buff_config");
	}

	public void InitByXML(string path)
	{
		TextAsset textAsset = (TextAsset)Resources.Load(path);
		
		XmlDocument xml = new XmlDocument();
		xml.LoadXml(textAsset.text);
		
		XmlNode mapNode = xml.SelectSingleNode("data");
		
		XmlNodeList nodeList = mapNode.SelectNodes("item");
		for(int i=0; i<nodeList.Count; i++)
		{
			BuffData data = new BuffData(nodeList[i]);
			if(!dataDict.ContainsKey(data.id))
				dataDict.Add(data.id, data);
			else
				Debuger.LogError("buff " + data.id + " has duplicate");
		}
	}

	private static BuffManager instance;
	public static BuffManager GetInstance()
	{
		if(instance == null)
		{
			instance = new BuffManager();
		}
		return instance;
	}

	public BuffData GetData(int id)
	{
		if(dataDict.ContainsKey(id))
			return dataDict[id];
		Debuger.LogWarning("can not find buff["+id+"]");
		return null;
	}








	public Buff AddBuff(int id, BattleObject target, BattleObject launcher)
	{
		BuffData data = GetData(id);
		if(data == null || target == null || launcher == null)
		{
			return null;
		}

		Buff buff = new Buff(data);
		buff.target = target;
		buff.launcher = launcher;

		BattleObject owner = buff.GetOwner();
		owner.AddBuff(buff);

		buff.CreateGraphicsEffect(owner.GetBaseTransform());
		if(SoundUtils.IsSoundNear(owner.position))
			SoundManager.GetInstatnce().effectSound.Play(buff.GetSoundEffect());

		DealBuff(owner, buff, State.Add);
		return buff;
	}

	public void RemoveBuff(Buff buff, bool noDeal=false)
	{
		BattleObject owner = buff.GetOwner();
		owner.RemoveBuff(buff);
		buff.target = null;
		buff.launcher = null;
		buff.RemoveGraphicsEffect();
		if(!noDeal)
			DealBuff(owner, buff, State.Remove);
	}

	public void DealBuff(BattleObject battleObj, Buff buff, State state)
	{
		for(int i=0; i<buff.GetNumBuffTypes(); i++)
		{
			switch(buff.GetBuffType(i))
			{
			case Buff.BuffType.Damage:
				if(state == State.Add)
					DealDamage(battleObj, buff);
				break;
			case Buff.BuffType.SpeedUp:
			case Buff.BuffType.SlowDown:
				DealSpeedModify(battleObj);
				break;
			case Buff.BuffType.Stuck:
				DealStuck(battleObj);
				break;
			case Buff.BuffType.Invisible:
				DealInvisible(battleObj);
				break;
			case Buff.BuffType.Bigger:
				DealBigger(battleObj);
				break;
			case Buff.BuffType.HoldAction:
				DealHoldAction(battleObj);
				break;
			}
		}
	}

	private void DealDamage(BattleObject battleObj, Buff buff)
	{
		for(int i=0; i<buff.GetNumBuffTypes(); i++)
		{
			if(buff.GetBuffType(i) == Buff.BuffType.Damage)
			{
				battleObj.MakeDamage(buff.GetConfigValue(i).GetValue(0), buff.launcher);
			}
		}
	}

	private void DealSpeedModify(BattleObject battleObj)
	{
		float add = 0;
		float reduce = 0;

		List<Buff> buffList = battleObj.GetBuffList();
		for(int i=0; i<buffList.Count; i++)
		{
			Buff buff = buffList[i];
			for(int j=0; j<buff.GetNumBuffTypes(); j++)
			{
				if(buff.GetBuffType(j) == Buff.BuffType.SpeedUp)
				{
					float speed = buff.GetConfigValue(j).GetValue(battleObj.originMoveSpeed);
					if(speed > add)
					{
						add = speed;
					}
				}
				else if(buff.GetBuffType(j) == Buff.BuffType.SlowDown)
				{
					float speed = buff.GetConfigValue(j).GetValue(battleObj.originMoveSpeed);
					if(speed > reduce)
					{
						reduce = speed;
					}
				}
			}
		}

		if(reduce == battleObj.originMoveSpeed)
		{
			battleObj.modifyMoveSpeed = -reduce;
		}
		else
		{
			battleObj.modifyMoveSpeed = add - reduce;
		}
	}

	private void DealStuck(BattleObject battleObj)
	{
		List<Buff> buffList = battleObj.GetBuffList();
		for(int i=0; i<buffList.Count; i++)
		{
			Buff buff = buffList[i];
			for(int j=0; j<buff.GetNumBuffTypes(); j++)
			{
				if(buff.GetBuffType(j) == Buff.BuffType.Stuck)
				{
					battleObj.enableMove = battleObj.enablePower = false;
					return;
				}
			}
		}

		battleObj.enableMove = battleObj.enablePower = true;
	}

	private void DealInvisible(BattleObject battleObj)
	{
		bool invisible = false;
		List<Buff> buffList = battleObj.GetBuffList();
		for(int i=0; i<buffList.Count; i++)
		{
			Buff buff = buffList[i];
			for(int j=0; j<buff.GetNumBuffTypes(); j++)
			{
				if(buff.GetBuffType(j) == Buff.BuffType.Invisible)
				{
					invisible = true;
					break;
				}
			}
		}

		battleObj.SetInvisible(invisible, Session.GetInstance().GetBattleSession().myPlayer.team == battleObj.team);
	}

	private void DealBigger(BattleObject battleObj)
	{
		float value = 0;

		List<Buff> buffList = battleObj.GetBuffList();
		for(int i=0; i<buffList.Count; i++)
		{
			Buff buff = buffList[i];
			for(int j=0; j<buff.GetNumBuffTypes(); j++)
			{
				if(buff.GetBuffType(j) == Buff.BuffType.Bigger)
				{
					float v = buff.GetConfigValue(j).GetValue(1f);
					if(v > value)
					{
						value = v;
					}
				}
			}
		}

		float totalValue = 1f + value;

		float hpAdd = battleObj.originMaxHp * value;
		battleObj.maxHp = battleObj.originMaxHp * totalValue;
		battleObj.hp += hpAdd;

		if(battleObj is Craft)
		{
			Craft craft = battleObj as Craft;
			Power power = craft.GetPowerManager().GetAttack();
			power.modifyValue = (int)(value * (float)power.GetOriginValue());
		}

		MapObjectScaler.Scale(battleObj, totalValue);
	}



	private void DealHoldAction(BattleObject battleObj)
	{
		bool hasHold = false;
		List<Buff> buffList = battleObj.GetBuffList();
		for(int i=0; i<buffList.Count; i++)
		{
			Buff buff = buffList[i];
			for(int j=0; j<buff.GetNumBuffTypes(); j++)
			{
				if(buff.GetBuffType(j) == Buff.BuffType.HoldAction)
				{
					hasHold = true;
				}
			}
		}

		battleObj.holdAction = hasHold;
	}


}