-- Combat state
gha_combat = { }

--INIT
gha_combat["Init"] = function(LuaAI)
log("gha_combat  Init")
return false -- cant add this state from startup 
end

-- ENTER
gha_combat["Enter"] = function(LuaAI)
	log("gha_combat Enter")

	data = LuaAI:Data()
	unit = data["victim"]
	data["victim"] = nil
	data[GHA_COMBAT] = {}

	-- here will be gha_team_combat_state	
	if unit == nil then LuaAI:ChangeState(gha_main) return end
	
	-- DEBUG STUFF
	log("Target guid = " .. unit:GetGUIDLow() )
	
	if gha_checkforhelp(LuaAI,unit) then LuaAI:ChangeState( gha_team_combat ) return end
	
	gha_combat["AttackStart"](LuaAI,unit)
	LuaAI:SetUpdateInterval(100)
	LuaAI:SetDefaultUpdate(false)
	
	 player = unit:CastToPlayer()
		if player ~= nil then i_creature:SetLootRecipient( player ) end

end

-- EXIT
gha_combat["Exit"] = function(LuaAI)
log("gha_combat Exit")
data = LuaAI:Data()
	data[GHA_COMBAT] = nil
	--TODO Stop attacking
	gha_combat["AttackStop"](LuaAI,nil)
    i_creature:CombatStop(true)
    i_creature:DeleteThreatList()
end

-- UPDATE
gha_combat["Update"] = function(LuaAI)
	i_creature = LuaAI:GetCreature()	
	local data = LuaAI:Data()
	
    if( not i_creature:SelectHostilTarget() ) or  ( not i_creature:getVictim() ) then
			if data[GHA_COMBAT]["sent_evade_check"] then return end
			m_guid = i_creature:GetGUID()
			log("Sent GHA_COMBAT_EVADE_CHECK")
			DispatchMsg(7000,m_guid,m_guid,GHA_COMBAT_EVADE_CHECK,nil)
			data[GHA_COMBAT]["sent_evade_check"] = true
			return 
			end
    
		if i_creature:getVictim() ~= nil then
			if ( gha_combat["needToStop"](LuaAI) ) then
				gha_combat["AttackStop"](LuaAI,nil)
				return;
			end
			
			if i_creature:IsWithinDist(i_creature:getVictim(), ATTACK_DIST)  and  i_creature:isAttackReady(BASE_ATTACK) then
                i_creature:AttackerStateUpdate(i_creature:getVictim(),BASE_ATTACK,false)
                i_creature:resetAttackTimer(BASE_ATTACK)
            end
		
		end
end

-- DEINIT
gha_combat["DeInit"] = function(LuaAI)
log("gha_combat DeInit")
gha_main["DeInit"](LuaAI)
end

-- MoveInLineOfSight
gha_combat["MoveInLineOfSight"] = function(LuaAI,unit)
log("gha_combat MoveInLineOfSight")
end

-- AttackStart
gha_combat["AttackStart"] = function(LuaAI,unit)
log("gha_combat AttackStart")
    if unit == nil then return end
	i_creature = LuaAI:GetCreature()
	local data = LuaAI:Data()
	
	if(unit:HasStealthAura()) 
	then
		unit:RemoveSpellsCausingAura(SPELL_AURA_MOD_STEALTH)
    end   
	
    if i_creature:Attack(unit,false) then
    
        i_creature:AddThreat(unit, 0,0,nil)
        i_creature:resetAttackTimer(BASE_ATTACK)
        if gha_victim_is_within_combat_range(i_creature) then
				log(" i_creature:MutateTargeted(unit) ") 
		        i_creature:MutateTargeted(unit) 
		end
    end
    
end

-- AttackStop
gha_combat["AttackStop"] = function(LuaAI,unit)
log("gha_combat AttackStop")
-- WARNINGunit may be called with nil value ... so carefull
	i_creature = LuaAI:GetCreature()

	i_creature:AttackStop()
    
    if i_creature:GetMotionType() == TARGETED_MOTION_TYPE then
		i_creature:MovementClear(false)
	    i_creature:MutateIdle()
    end
    
end

-- HandleMessage
gha_combat["HandleMessage"] = function(LuaAI,sender,msg,extrainfo)
log("gha_combat HandleMessage , msg= %d , mguidlow = %d" , msg ,LuaAI:GetCreature():GetGUIDLow() )
i_creature = LuaAI:GetCreature()	
data = LuaAI:Data()

if msg == GHA_COMBAT_EVADE_CHECK then
	data[GHA_COMBAT]["sent_evade_check"] = false
	if( not i_creature:SelectHostilTarget() ) or  ( not i_creature:getVictim() ) then
			log("Evading from enemy ... ")
			i_creature:MovementClear(false)
			i_creature:MutateTargetedHome()
			LuaAI:ChangeState( gha_main )
	else
		gha_combat["AttackStart"]( LuaAI,i_creature:getVictim() )
	end
	return 0
end

return 0 
end

-- DamageInflict
gha_combat["DamageInflict"] = function(LuaAI,unit,amount_damage)
log("gha_combat DamageInflict")
    if unit == nil then return end
	gha_combat["AttackStart"](LuaAI,unit)
end

-- IsVisible
gha_combat["IsVisible"] = function(LuaAI,unit)
log("gha_combat IsVisible")
-- In combat state ,we care only about our enemy .... possibly later will add trheat list
return false
end

-- needToStop
gha_combat["needToStop"] = function(LuaAI)
log("gha_combat needToStop")
i_creature = LuaAI:GetCreature()

-- checked in gha_victim_is_within_combat_range
--	if ( not i_creature:isAlive() ) or ( i_creature:getVictim() == nil ) 
--		then
--       return true
--       end
    return not gha_victim_is_within_combat_range(i_creature)
end

m_AI["gha_combat"] = gha_combat