class_name SceneManager extends Node2D
@onready var crates: Node2D = $"../Crates"
var grenade = preload("res://Scenes/grenade.tscn")
@onready var enemies: Node2D = $"../Enemies"

func _ready() -> void:
	GameController.reset()
	print("Scene manager is ready!")
	GameController.destroySignal.connect(destroy)
	GameController.levelChangeSignal.connect(changeScene)
	buildLevel()
	
func destroy(body)->void:
	if body is Crate:
		body.queue_free()
	
func buildLevel()->void:
	updateCrates()
	if enemies:
		updateEnemies()

func updateEnemies()->void:
	var totalEnemies = 0
	for obj in enemies.get_children():
		if obj is Slime:
			totalEnemies +=1
			#hook up signals
			if not obj.slimeDamageSignal.is_connected(GameController._on_slime_damage):
				obj.slimeDamageSignal.connect(GameController._on_slime_damage)	
				GameController.addEnemyToLevel(obj)
func updateCrates()->void:
	#is there a crate holder?
	var _crateTotal:int = 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)
				_crateTotal +=1
	print("Number of crates: "+str(_crateTotal))
	GameController.totalCrates(_crateTotal)

func makeGrenade(_grenadePosition, _grenadeDirection)->void:
	print("SM wants to make a grenade")
	var myGrenade:Grenade = grenade.instantiate()
	owner.add_child(myGrenade)
	myGrenade.transform = _grenadePosition
	myGrenade.apply_central_impulse(Vector2(_grenadeDirection,-1)*200)
	
func changeScene(level)->void:
	print("SM wants to change scene "+level)
	get_tree().call_deferred("change_scene_to_file",level)