class_name SceneManager extends Node2D

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

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

# Called when the node enters the scene tree for the first time.
func _ready() -> void:
	Gamecontroller.reset()
	buildLevel()
	Gamecontroller.teleportSignal.connect(teleport)
	Gamecontroller.destroySignal.connect(destroy)
	Gamecontroller.damageSignal.connect(damage)
	player.bulletSignal.connect(makeBullet)
	player.deathCompleteSignal.connect(Gamecontroller.levelChange)
	updateCrates()
	updateCoins()
	updateEnemies()


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

func updateCrates()->void:
	var totalCrates = 0
	# loop through all crates
	for obj in crates.get_children():
		if obj is Crate:
			#check if the tree exit signal is wired up
			if not obj.tree_exited.is_connected(updateCrates):
				obj.tree_exited.connect(updateCrates)
			totalCrates +=1
	# tell the gamecontroller how many crates
	Gamecontroller.crateTotal(totalCrates)

func updateCoins()->void:
	var totalCoins = 0
	#loop through the coins
	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.coinCollisionSignal.is_connected(Gamecontroller.coinCollected):
				obj.coinCollisionSignal.connect(Gamecontroller.coinCollected)
			totalCoins +=1
	Gamecontroller.coinTotal(totalCoins)

func updateEnemies()->void:
	if enemies:
		for obj in enemies.get_children():
			var enemy = obj as Slime
			if enemy:
				Gamecontroller.addEnemyToLevel(enemy)
				if not enemy.enemyAttackSignal.is_connected(Gamecontroller.slimeAttack):
					enemy.enemyAttackSignal.connect(Gamecontroller.slimeAttack)
					
func buildLevel()->void:
	if triggers:
		for obj in triggers.get_children():
			if obj is Trigger:
				if not obj.areaTriggered.is_connected(Gamecontroller._on_trigger):
					obj.areaTriggered.connect(Gamecontroller._on_trigger)
					
func teleport(body, _bodyposition=null)->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)
#order desk (for bullets)
func makeBullet(pos, speed)->void:
	#ask for a bullet from....the factory
	print("make a bullet")
	var myBullet:Bullet = bulletFactory()
	myBullet.transform = pos
	myBullet.setSpeed(speed)
	myBullet.set_process(true)
	
func bulletFactory()->Bullet:
	var myBullet:Bullet
	#how many bullets have been created?
	if bulletArray.size() <= totalAllowedBullets:
		myBullet = bullet.instantiate()
		add_sibling(myBullet)
		#wire up a signal to the game controller
		if not myBullet.bulletDamageSignal.is_connected(Gamecontroller._on_bullet_hit):
			myBullet.bulletDamageSignal.connect(Gamecontroller._on_bullet_hit)
	else:
		#recycle bullet
		myBullet = bulletArray.pop_back()
		
	#put the bullet in my collection
	bulletArray.push_front(myBullet)
	return myBullet

func destroy(target)->void:
	if target is Bullet:
		stash(target)
	if target is Crate:
		target.queue_free()
	if target is Coin:
		target.queue_free()
	if target is Slime:
		target.queue_free()
	if target is Player:
		target.kill()
		
func damage(target)->void:
	if target is Slime:
		target.takeDamage()
	if target is Player:
		target.takeDamage()
			
func stash(target:Bullet)->void:
	print("stash a bullet")
	#hide the bullet off-screen
	var stashPosition:Vector2 = Vector2(-100,-100)
	target.position = stashPosition
	target.setSpeed(0)
	target.set_process(false)