extends Node2D

signal comet_shot (size : int)
signal screen_cleared

const COMET = preload("res://scenes/comet.tscn")

var comet_count := 1

var viewport_size := Vector2.ZERO
var random_position := Vector2.ZERO

func _ready() -> void:
	viewport_size = get_viewport_rect().size
	for comet in range(comet_count):
		random_position.x = randf_range(viewport_size.x - 100, viewport_size.x)
		random_position.y = randf_range(viewport_size.y - 100, viewport_size.y)
		spawn_comet(2, random_position)

func _process(_delta: float) -> void:
	viewport_size = get_viewport_rect().size
	if $Comets.get_child_count() <= 0:
		screen_cleared.emit()
		queue_free()


func spawn_comet(size : int, pos : Vector2) -> void:
	var comet := COMET.instantiate()
	comet.position = pos
	comet.current_size = size
	comet.exploded.connect(comet_cleanup)
	$Comets.add_child(comet)

func comet_cleanup(new_size : int, current_position : Vector2) -> void:
	comet_shot.emit(new_size + 1)
	if new_size >= 0:
		for n in range(2):
			spawn_comet(new_size, current_position)