class_name ReferenceImage
extends Sprite
# A class describing a reference image

signal properties_changed

var project = Global.current_project

var image_path: String = ""


func _ready() -> void:
	project.reference_images.append(self)


func change_properties() -> void:
	emit_signal("properties_changed")


# Resets the position and scale of the reference image.
func position_reset() -> void:
	position = project.size / 2.0
	if texture != null:
		scale = (
			Vector2.ONE
			* min(project.size.x / texture.get_width(), project.size.y / texture.get_height())
		)
	else:
		scale = Vector2.ONE


# Serialize details of the reference image.
func serialize() -> Dictionary:
	return {
		"x": position.x,
		"y": position.y,
		"scale_x": scale.x,
		"scale_y": scale.y,
		"modulate_r": modulate.r,
		"modulate_g": modulate.g,
		"modulate_b": modulate.b,
		"modulate_a": modulate.a,
		"image_path": image_path
	}


# Load details of the reference image from a dictionary.
# Be aware that new ReferenceImages are created via deserialization.
# This is because deserialization sets up some nice defaults.
func deserialize(d: Dictionary) -> void:
	modulate = Color(1, 1, 1, 0.5)
	if d.has("image_path"):
		# Note that reference images are referred to by path.
		# These images may be rather big.
		# Also
		image_path = d["image_path"]
		var img := Image.new()
		if img.load(image_path) == OK:
			var itex := ImageTexture.new()
			# don't do FLAG_REPEAT - it could cause visual issues
			itex.create_from_image(img, Texture.FLAG_MIPMAPS | Texture.FLAG_FILTER)
			texture = itex
	# Now that the image may have been established...
	position_reset()
	if d.has("x"):
		position.x = d["x"]
	if d.has("y"):
		position.y = d["y"]
	if d.has("scale_x"):
		scale.x = d["scale_x"]
	if d.has("scale_y"):
		scale.y = d["scale_y"]
	if d.has("modulate_r"):
		modulate.r = d["modulate_r"]
	if d.has("modulate_g"):
		modulate.g = d["modulate_g"]
	if d.has("modulate_b"):
		modulate.b = d["modulate_b"]
	if d.has("modulate_a"):
		modulate.a = d["modulate_a"]
	change_properties()


# Useful for HTML5
func create_from_image(image: Image) -> void:
	var itex := ImageTexture.new()
	# don't do FLAG_REPEAT - it could cause visual issues
	itex.create_from_image(image, Texture.FLAG_MIPMAPS | Texture.FLAG_FILTER)
	texture = itex
	position_reset()