@tool
extends Node

var shader_time: float = 0.0
var time_scale: float = 1.0

var beat: float = 0.0: set = set_beat
var bar: float = 0.0: set = set_bar
var song_time: float = 0.0: set = set_song_time
var total_song_time: float = 0.0: set = set_total_song_time
var user_offset_ms: float = 0.0


func _notification(what: int) -> void:
	if what == NOTIFICATION_EDITOR_PRE_SAVE:
		# Just in case.
		RenderingServer.global_shader_parameter_set(&"time", 0.0)


func _process(delta: float) -> void:
	shader_time += delta * time_scale
	RenderingServer.global_shader_parameter_set(&"time", shader_time)


func set_paused(value: bool) -> void:
	set_process(not value)


func set_user_offset_ms(offset: float) -> void:
	user_offset_ms = offset
	RenderingServer.global_shader_parameter_set(&"user_offset_ms", beat)


func set_beat(_beat: float) -> void:
	beat = _beat
	RenderingServer.global_shader_parameter_set(&"beat", beat)


func set_bar(_bar: float) -> void:
	bar = _bar
	RenderingServer.global_shader_parameter_set(&"bar", bar)


func set_song_time(time: float) -> void:
	song_time = time
	RenderingServer.global_shader_parameter_set(&"song_time", time)


func set_total_song_time(time: float) -> void:
	total_song_time = time
	RenderingServer.global_shader_parameter_set(&"total_song_time", time)