extends Node


#### Timer
func wait(duration: float) -> void:
	if duration <= 0:
		return
	await get_tree().create_timer(duration).timeout


func timer(duration: float, callable: Callable) -> SceneTreeTimer:
	var t = get_tree().create_timer(duration, false)
	t.timeout.connect(callable)
	return t


#### Canvas
func shake_layer(layer: CanvasLayer, duration: float, delta := 2.0, fps := 20.0) -> void:
	var tween = layer.create_tween()
	# shake layer's offset
	var origin_offset = layer.offset
	var count = int(duration * fps)
	var delta_t = 1.0 / fps
	for i in range(count):
		var offset = Vector2(randf_range(-delta, delta), randf_range(-delta, delta))
		tween.tween_property(layer, "offset", origin_offset + offset, delta_t)
	# tween back to origin
	tween.tween_property(layer, "offset", origin_offset, delta_t)


###### Dialogue
func concact_content_from_lines(lines := []):
	if lines.is_empty():
		return ""
	var content = ""
	for i in range(len(lines) - 1):
		var line = lines[i] as DialogueLine
		content += TranslationServer.tr(line.translation_key) + "\n"
	# last line without "\n"
	content += TranslationServer.tr(lines[-1].translation_key)
	return content


func get_lines(res: DialogueResource, title: String) -> Array:
	var lines = []
	var current_line = await res.get_next_dialogue_line(title)
	while current_line:
		lines.append(current_line)
		if current_line.next_id != "end":
			current_line = await res.get_next_dialogue_line(current_line.next_id)
		else:
			break
	return lines


# pop os lines
func generate_lines(content: String) -> Array:
	var text = "~ title\n" + content + "\n=> END"
	var res = DialogueManager.create_resource_from_text(text)
	return await get_lines(res, "title")