package Chainlightning


	/////////////////////////////////////////////////////////////
	//////////////////     Konstanten         ///////////////////
	////////////////////////////////////////////////////////////


	import UnitClass
	import AreaMarker
	import Filter
	import Buff
	import Fx
	import Stun
	import Missle
	import CustomEvent
	import Lightning
	
	constant int spellID = 'A999'
	constant real initialBlitzSpeed = 5
	constant real secondBlitzSpeed = 10
	constant real initianlBlitzDist = 600
	constant real chainGroupRadius = 64
	constant real chainGroupRangeNext = 800
	constant int chainJumpNumber = 2
	constant real chainSlowPer = 50
	constant real chainSlowDur = 5
	constant real chainStunDur = 3
	constant real baseDmg = 50
	constant string blitzString = FINGER_OF_DEATH
	
	
	/////////////////////////////////////////////////////////////
	///////////////////      Init         ///////////////////////
	////////////////////////////////////////////////////////////
	
		
	init	
		trigger t = CreateTrigger()
		t.addAction(function spellStart)
		t.registerAnyUnitEvent(EVENT_PLAYER_UNIT_SPELL_CAST)
	
	function spellStart()
		if GetSpellAbilityId() == spellID
			new ChainlighningInit(GetTriggerUnit(), vec2(GetSpellTargetX(),GetSpellTargetY()))
			
			
	/////////////////////////////////////////////////////////////
	///////////         SkillShot       /////////////////////////
	////////////////////////////////////////////////////////////				
	
	class ChainlighningInit
		
		Unit u
		int jumps
		
		private construct(unit u, vec2 pos)
			this.u=u.getUserData() castTo Unit
			vec2 posU = u.getPos()
			angle spellAngle = posU.angleTo(pos)
			jumps = chainJumpNumber
			Missle missle = new Missle(posU, pos, initialBlitzSpeed, chainGroupRadius, initianlBlitzDist, this.u, function allEnemysAndNotUnit)
			missle.setEffect("Abilities\\Weapons\\VengeanceMissile\\VengeanceMissile.mdl")
			Action a = missle.registerHitEvent(function onHit)
			a.setData(this castTo int)
			
			
		private static function onHit()
			currentAction.getData() castTo ChainlighningInit.theSpellStunCheck(function onHit) 
		
		private function theSpellStunCheck(code onHit)
			Unit uOld = triggerUnit
			uOld.damageMagic(u, baseDmg)
			vec2 posU = uOld.u.getPos()
			
			group g = CreateGroup()
			filterCheckUnit = uOld.u
			filterCheckPlayer = u.owner
			GroupEnumUnitsInRange(g,posU.x,posU.y,chainGroupRangeNext, Condition(function allEnemysAndNotUnit))
			Unit uNew = GroupPickRandomUnit(g).getUserData() castTo Unit
			
			if uNew != null
				new Flash(u, uOld, uNew, jumps)
			else 
				uOld.addStun(chainStunDur)
				
			DestroyGroup(g)


	/////////////////////////////////////////////////////////////
	///////////         Flash           /////////////////////////
	////////////////////////////////////////////////////////////
				
			
	class Flash	
		timer t = getTimer()
		lightning l
		Unit u
		Unit uOld
		Unit uNew
		int jumps
		int i
		Table wasHit = new Table()
		
		construct(Unit u, Unit uOld, Unit uNew, int jumps)	
			this.u=u
			this.uOld=uOld
			wasHit.saveBoolean(GetHandleId(uOld.u), true)
			this.uNew=uNew
			wasHit.saveBoolean(GetHandleId(uNew.u), true)
			this.jumps=jumps-1
			
			i = R2I(1/0.03)
			if jumps>0
				vec2 pos = uOld.u.getPos()
				vec2 pos2 = uNew.u.getPos()
				l = createLightning(blitzString, pos, pos2)
				t.setData(this castTo int)
				t.startPeriodic(0.03, function callMove)
			else
				destroy this
				
		construct(Unit u, Unit uOld, Unit uNew, int jumps, code callMove)	
			this.u=u
			this.uOld=uOld
			this.uNew=uNew
			wasHit.saveBoolean(GetHandleId(uNew.u), true)
			this.jumps=jumps-1
			i = R2I(1/0.03)
			if jumps>0
				vec2 pos = uOld.u.getPos()
				vec2 pos2 = uNew.u.getPos()
				l = createLightning(blitzString, pos, pos2)
				t.setData(this castTo int)
				t.startPeriodic(0.03, callMove)
			else
				uOld.addStun(chainStunDur)
				destroy this
				
		ondestroy
			t.release()
			destroy wasHit

		private static function callMove()
			GetExpiredTimer().getData() castTo Flash.move(function callMove)
		
		private function move(code callMove)
			vec2 pos = uOld.u.getPos()
			vec2 pos2 = uNew.u.getPos()
			l.setPos(pos, pos2)
			
			i--
			if i <= 0
				l.destr()
				t.release()
				vec2 posU = uNew.u.getPos()			
				group g = CreateGroup()
				filterCheckUnit = u.u
				GroupEnumUnitsInRange(g,posU.x,posU.y,chainGroupRangeNext, Condition(function allEnemysAndNotUnit))
				for unit gu in g
					if wasHit.loadBoolean(GetHandleId(gu))
						GroupRemoveUnit(g, gu)
				Unit uLatest = GroupPickRandomUnit(g).getUserData() castTo Unit
			
				if uLatest != null
					new Flash(u, uNew, uLatest, jumps, callMove)
				else 
					uNew.addStun(chainStunDur)
				
				DestroyGroup(g)	
					
			
endpackage