class_name Selectable
extends Area2D

signal clicked

var is_clickable = false
var selection_sprite: Sprite2D

func _ready():
	if selection_sprite: return
	
	var parent_sprite = get_parent() as Sprite2D
	selection_sprite = Sprite2D.new()
	selection_sprite.texture = parent_sprite.texture.duplicate(true)
	var scale_x = ((selection_sprite.texture.get_size().x + 10) / selection_sprite.texture.get_size().x)
	var scale_y = ((selection_sprite.texture.get_size().y + 10) / selection_sprite.texture.get_size().y)
	selection_sprite.scale = Vector2(scale_x,scale_y)
	selection_sprite.show_behind_parent = true
	selection_sprite.modulate = Color.BLACK
	selection_sprite.visible = false
	parent_sprite.call_deferred("add_child", selection_sprite)
	parent_sprite.call_deferred("move_child", selection_sprite, 0)

func _input(event):
	if is_clickable and event is InputEventMouseButton and event.is_pressed():
		clicked.emit()

func _on_mouse_entered():
	is_clickable = true
	selection_sprite.show()

func _on_mouse_exited():
	is_clickable = false
	selection_sprite.hide()