class_name SceneManager extends Node2D

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

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:
	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")
	updateCrates()
	updateTriggers() 
	updateCoins()
	updateEnemies()
 	
	#wire up signals from GameController
	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 gamecontroller
				if not obj.coinCollectedSignal.is_connected(Gamecontroller._on_coin_collected):
					obj.coinCollectedSignal.connect(Gamecontroller._on_coin_collected)
				if not obj.tree_exited.is_connected(updateCoins):
					obj.tree_exited.connect(updateCoins)
					
		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 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
		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(506, 340)
		body.teleport_to(newPosition)
		
func loadLevel(level:String)->void:
	get_tree().call_deferred("change_scene_to_file", level)
func stashBullet(bullet:Bullet)->void:
	var stashPos:Vector2 = Vector2(-100, -100)
	bullet.position = stashPos
	bullet.setSpeed(0)
	bullet.set_process(false)
func bullectFactory()->Bullet :
	var myBullet:Bullet
	#how many bullets have we 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 bullet")
	print("bullets created"+str(bulletArray.size()))
	var myBullet:Bullet = bullectFactory()
	myBullet.transform = targetPosition
	myBullet.setSpeed(speed)
	myBullet.set_process(true)