class_name SceneManager extends Node2D
@onready var triggers: Node2D = $"../Triggers"
@onready var level: Node2D = $"../Level"
@onready var crates: Node2D = $"../Crates"
@onready var coins: Node2D = $"../Coins"
@onready var slimes: Node2D = $"../Slimes"

# has the recepies
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:
	# resets the timer
	# player health
	Gamecontroller.reset()
	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")
	updatesCrates()
	updateTriggers()
	updateCoins()
	updateEnemies()
	
	#wire up signals from gamecontrollerd  
	Gamecontroller.destroySignal.connect(destroy)
	Gamecontroller.teleportSignal.connect(teleport)
	Gamecontroller.levelChangeSignal.connect(loadLevel)

func updateEnemies() -> void:
	if slimes: 
		var totalSlimes =0
		for obj in slimes.get_children():
			if obj is Slime:
				totalSlimes +=1
				Gamecontroller.addEnemyToLevel(obj)
				#hook up to game controller
				if not obj.slimeDamageSignal.is_connected(Gamecontroller._on_slime_damage):
					obj.slimeDamageSignal.connect(Gamecontroller._on_slime_damage)
	
	
	
func updateCoins() -> void:
	if coins: 
		var totalCoins=0
		for obj in coins.get_children():
			if obj is Coin:
				totalCoins +=1 
				# hook up coin to gamecontrollerd
				if not obj.coinCollectedSignal.is_connected(Gamecontroller._on_coin_collected):
					obj.coinCollectedSignal.connect(Gamecontroller._on_coin_collected)
				# any time coin destroyed update game controller
				if not obj.tree_exited.is_connected(updateCoins):
					obj.tree_exited.connect(updateCoins)
		
		# tell game controller!
		Gamecontroller.totalCoins(totalCoins)
				
				

func updateTriggers()->void:
	if triggers:
		for obj in triggers.get_children():
			if obj is Trigger:
				if not obj.AreaTrigger.is_connected(Gamecontroller._on_trigger):
					obj.AreaTrigger.connect(Gamecontroller._on_trigger)
				

func updatesCrates() -> 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(updatesCrates):
					obj.tree_exited.connect(updatesCrates)
				totalCrates+=1
		print("Total crates: "+str(totalCrates))
		Gamecontroller.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(Gamecontroller.bulletDamage):
			myBullet.bulletDamageSignal.connect(Gamecontroller.bulletDamage)
		add_sibling(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)