package Creep
import public Entity
import public ClosureTimers
import public Wave
import public TerrainUtils
import public Bounty
import public initlater PlayerData
import initlater LumberAndCoinSystem
import GameTimer

public constant CREEP_OWNER = players[9]

public int array pow2

init
	for int i = 0 to 31
		pow2[i] = R2I(Pow(2, I2R(i)))

public function getPathingNormal(vec2 pos) returns vec2
	let numberOfTests = 8
	let radius = 64.
	vec2 addedVecs = vec2(0, 0)
	for int i = 1 to numberOfTests
		let direction = vec2(0,0).polarOffset((i * 2 * bj_PI/numberOfTests).asAngleRadians(), radius)
		let testPoint = pos + direction
		if testPoint.isTerrainWalkable()
			addedVecs += direction
	return addedVecs.setLength(1.) * (-1.)

public function getBounceVec(vec3 vel3, vec2 nor2) returns vec3
	let nor3 = nor2.toVec3()
	let pv3 = vel3.project(nor3)
	vec2 pv2 = pv3.toVec2()
	pv2 *= (-1.25)
	return vel3 + pv2


public class Creep extends UnitEntity
	int bounty
	boolean dropCoin

	construct(vec3 pos, int typId, int bounty, vec2 target, angle ang)
		super(createUnit(CREEP_OWNER, typId, pos.toVec2(), ang), pos, 16)
		actor.setAnimation("birth")
		this.bounty = bounty
		dropCoin = shouldSpawnCoin()

		// Apply timed life to prevent blocking and creeps getting stuck
		actor.setTimedLife(5.15 * 60.)
		EventListener.add(actor, EVENT_PLAYER_UNIT_DEATH, () -> onDeath())
		doAfter(GetRandomReal(0.01, 0.2)) ->
			actor.issuePointOrder("attack", target)

	function onDeath()
		let killer = GetKillingUnit()
		if dropCoin
			let itm = createItem(COIN_ID, getPos())
			itm.setUserData((getElapsedGameTime() / 17.).round())
			doAfter(45.) ->
				if itm != null and GetWidgetLife(itm) > .405
					itm.remove()

		if killer != null and killer.getOwner() != owner
			let size = allPlayers.size()
			if pDatas[killer.getOwner().getId()] == null
				var killBounty = (bounty div size)
				if killBounty <= 0
					killBounty = 1
				for pd in allPlayers
					if(pd.p != killer.getOwner())
						pd.p.addGold(killBounty)
						showBountyTextTag(killBounty, actor, pd.p)
			else if size > 0 and bounty > 0
				var killBounty = (bounty div size) + (bounty mod size)
				if killBounty < 1
					killBounty = 1
				var restBounty = 0
				if size > 1 and bounty-killBounty > 0
					restBounty = ((bounty-killBounty) / (size - 1.)).round()

				killer.getOwner().addGold(killBounty)
				showBountyTextTag(killBounty, actor, killer.getOwner())
				if restBounty > 0
					for pd in allPlayers
						if(pd.p != killer.getOwner())
							pd.p.addGold(restBounty)
							showBountyTextTag(restBounty, actor, pd.p)

	override function update()
		if pos.toVec2().isTerrainWalkable()
			vel *= (0.975)
		else
			let normal = getPathingNormal(pos.toVec2())
			vel = getBounceVec(vel, normal)
		super.update()