extends Node2D
# hold control and drag + drop

@onready var crates: Node2D = $"../Crates"
@onready var player: Player = $"../Player"
@onready var coins: Node2D = $"../Coins"
@onready var enemies: Node2D = $"../Enemies"

var bullet = preload("res://Scenes/bullet.tscn")
var bulletArray:Array[Bullet] = []
var totalAllowedBullets:int = 7
var coin

# Called when the node enters the scene tree for the first time.
func _ready() -> void:
	Gamecontroller.reset()
	player.pushSignal.connect(pushTarget)
	player.shootSignal.connect(makeBullet)
	player.deathAnimationCompleteSignal.connect(Gamecontroller.levelChange)
	
	#signals from the GameController
	Gamecontroller.destroySignal.connect(destroy)
	Gamecontroller.playerHurtSignal.connect(player.hurt)
	Gamecontroller.playerDeadSignal.connect(player.kill)
	
	#signals from pickups
	#coin.coinCollectedSignal.connect(Gamecontroller.coinCollected)
	buildLevel()

# Called every frame. 'delta' is the elapsed time since the previous frame.
func _process(delta: float) -> void:
	pass
	
func buildLevel() -> void:
	#tell GC how many crates...
	updateCrates()
	updateCoins()
	updateEnemies()
	
func updateCrates()->void:
	var totalCrates = 0
	if crates:
		for obj in crates.get_children():
			if obj is Crate:
				if not obj.tree_exited.is_connected(updateCrates):
					obj.tree_exited.connect(updateCrates)
				totalCrates +=1
	
	Gamecontroller.crateTotal(totalCrates)
	
func updateCoins()->void:
	var totalCoins = 0
	if coins:
		print("updateCoins called")
		for obj in coins.get_children():
			if obj is Coin:
				if not obj.tree_exited.is_connected(updateCoins):
					obj.tree_exited.connect(updateCoins)
				if not obj.coinCollectedSignal.is_connected(Gamecontroller.coinCollected):
					obj.coinCollectedSignal.connect(Gamecontroller.coinCollected)
				totalCoins +=1
	Gamecontroller.coinTotal(totalCoins)

func updateEnemies()->void:
	var totalEnemies = 0
	if enemies:
		for obj in enemies.get_children():
			if obj is Slime:
				Gamecontroller.addEnemyToLevel(obj)
				obj.slimeDamageSignal.connect(Gamecontroller.slimeAttack)
				totalEnemies += 1
	Gamecontroller.totalEnemies(totalEnemies)

func pushTarget(body,pushDirection)->void:
	if body is RigidBody2D:
		body.apply_central_impulse(pushDirection)

func stashBullet(bullet:Bullet)->void:
	# hide bullet
	var stashPosition:Vector2 = Vector2(-100,-100)
	bullet.position = stashPosition
	bullet.setSpeed(0)
	bullet.set_process(false)

func destroy(body)->void:
	match body:
		var bod when bod is Bullet:
			stashBullet(body)
		var bod when bod is Crate:
			body.queue_free()
		_:
			body.queue_free()

func bulletFactory()->Bullet:
	var myBullet:Bullet
	#how many bullets have been produced?
	if bulletArray.size() <= totalAllowedBullets:
		#make a new bullet
		myBullet = bullet.instantiate()
		add_sibling(myBullet)
		if not myBullet.bulletHitSignal.is_connected(Gamecontroller.bulletDamage):
			myBullet.bulletHitSignal.connect(Gamecontroller.bulletDamage)
	else:
		# gets oldest one - pop_back
		myBullet = bulletArray.pop_back()
		
	bulletArray.push_front(myBullet)
	return myBullet

func makeBullet(spawnPosition, speed)->void:
	print("make bullet")
	var myBullet:Bullet = bulletFactory()
	myBullet.transform = spawnPosition
	myBullet.setSpeed(speed)
	myBullet.set_process(true)