extends Node2D

@onready var start_button = $CanvasLayer/CenterContainer/Start
@onready var game_over = $CanvasLayer/CenterContainer/GameOver

var enemy: PackedScene = preload("res://enemy/enemy.tscn")
var score: int = 0
var enemies_count: int = 0

func _ready():
	game_over.hide()
	start_button.show()
	
func new_game():
	score = 0
	$CanvasLayer/UI.update_score(score)
	$Player.start()
	spawn_enemies()

func spawn_enemies():
	for x in range(9):
		for y in range(3):
			var e = enemy.instantiate()
			var pos = Vector2(x * (16 + 8) + 24, 16 * 4 + y * 16)
			add_child(e)
			e.call_deferred("start", pos)
			e.connect("died", Callable(self, "_on_enemy_died"))
			e.add_to_group("enemies")

	enemies_count = 27
			
func _on_enemy_died(value):
	score += value
	$CanvasLayer/UI.update_score(score)
	enemies_count -= 1

	if enemies_count == 0:
		call_deferred("spawn_enemies")

func _on_start_pressed():
	start_button.hide()
	new_game()

func _on_player_died():
	get_tree().call_group("enemies", "queue_free")
	game_over.show()
	await get_tree().create_timer(2).timeout
	game_over.hide()
	start_button.show()