package TowerBlockade
import Tower
import Projectile
import Creep
import Assets
import public Buff
import TextTagEntity
import PresetBuffs

constant blockadeBuff = compiletime(createDummyBuffObject("Blockade", "This tower cannot attack until the blockading unit is killed.", Icons.bTNEnsnare))
constant BLOCKADE_DURATION = 25.
public constant BLOCKADE_MISSILE_TIME = 5.
constant BLOCKADE_UNIT = 'u017'

public class TowerBlockadeMissile extends Projectile
	Tower utarget

	construct(vec3 pos, player owner, Tower target)
		super(pos, 16., owner, pos.angleTo2d(target.getPos()), Abilities.deathCoilMissile)

		utarget = target
		setTarget(target.getPos().add(0, 0, 64), 14.)
		setTargetted(target)

	ondestroy
		new TowerBlockadeBuff(utarget)

public class TowerBlockadeBuff extends NormalBuff
	BlockadeShip blockadeUnit
	effect blockadeEffect

	construct(UnitEntity target)
		super(BLOCKADE_DURATION, blockadeBuff)
		new TextTagEntity(target.getPos(), vec3(GetRandomReal(-1, 1), 0, GetRandomReal(7,9)), "Blockaded!", 9, 1., colorA(185, 14, 14, 255))
		this.apply(target.actor)

	override function onApply()
		let targetPos = target.getPos()
		blockadeUnit = new BlockadeShip(createUnit(CREEP_OWNER, BLOCKADE_UNIT, targetPos, angle(0)), this)
		blockadeEffect = addEffect(Abilities.howlTarget, targetPos)
		target.addBuff(this)
		target.issueImmediateOrder("stop")
		(target.getEntity() castTo Tower).pause()
		EventListener.add(target, EVENT_PLAYER_UNIT_DEATH) ->
			this.terminate()

	override function onEnd()
		blockadeEffect.destr()
		if blockadeUnit != null and blockadeUnit.actor.isAlive()
			destroy blockadeUnit
		if target != null and target.isAlive()
			(target.getEntity() castTo Tower).unpause()


class BlockadeShip extends UnitEntity
	TowerBlockadeBuff blockadeBuff

	construct(unit actor, TowerBlockadeBuff blockadeBuff)
		super(actor)
		this.blockadeBuff = blockadeBuff

		EventListener.add(actor, EVENT_PLAYER_UNIT_DEATH) ->
			let buffUnit = GetTriggerUnit().getEntity() castTo BlockadeShip
			if buffUnit != null
				buffUnit.terminateBuff()

	function terminateBuff()
		blockadeBuff.terminate()

	ondestroy
		if actor.isAlive()
			blockadeBuff.terminate()