class_name SceneManager extends Node2D
@onready var triggers: Node2D = $"../Triggers"
@onready var crates: Node2D = $"../Crates"
@onready var level: Node2D = $"../Level"
@onready var game: GameController = $".."

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

# Called when the node enters the scene tree for the first time.
func _ready() -> void:
	buildLevel()


# Called every frame. 'delta' is the elapsed time since the previous frame.
func _process(delta: float) -> void:
	pass

func buildLevel()->void:
	print("building level")
	updateCrates()
	updateTriggers()
	
	#wire up signals from GameController
	game.destroySignal.connect(destroy)
	game.teleportSignal.connect(teleport)
	game.levelChangeSignal.connect(loadLevel)
	
func updateTriggers()->void:
	if triggers:
		for obj in triggers.get_children():
			if obj is Trigger:
				if not obj.AreaTrigger.is_connected(game._on_trigger):
					obj.AreaTrigger.connect(game._on_trigger)
					
func updateCrates()->void:
	#check that there is a crates node
	if crates:
		var totalCrates = 0
		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
		game.crateUpdate(totalCrates)
		
func destroy(body)->void:
	if body is Bullet:
		stashBullet(body)
		return
	body.queue_free()
func teleport(body)->void:
	if body is Crate:
		var viewport_size = get_viewport().get_visible_rect().size
		var random_x = randf_range(0, viewport_size.x)
		var random_y = randf_range(0, viewport_size.y)
		var newPosition = Vector2(random_x,random_y)
		body.teleport_to(newPosition)
		
func loadLevel(level:String)->void:
	get_tree().call_deferred("change_scene_to_file", level)
func stashBullet(bullet:Bullet)->void:
	var stashPosition:Vector2 = Vector2(-100,100)
	bullet.position = stashPosition
	bullet.setSpeed(0)
	bullet.set_process(false)
	
func bulletFactory()->Bullet :
		var myBullet:Bullet
		#how many bullets have been made?
		if bulletArray.size() <= totalAllowedBullets:
			myBullet = bullet.instantiate()
			if not myBullet.bulletDamageSignal.is_connected(game.bulletDamage):
				myBullet.bulletDamageSignal.connect(game.bulletDamage)
			game.add_child(myBullet)
		else:
			myBullet = bulletArray.pop_back()
			
		bulletArray.push_front(myBullet)
		return myBullet
func makeBullet(targetPosition, speed)->void:
	print("Make a bullet!")
	print("bullets created: "+str( bulletArray.size() ))
	var myBullet:Bullet = bulletFactory()
	myBullet.transform = targetPosition
	myBullet.setSpeed(speed)
	myBullet.set_process(true)