class_name BeatChart
extends Resource

@export var chart_id: StringName = &""
@export var total_beats := 0
@export var tracks: Array = []


func all_events() -> Array:
	var result: Array = []
	for track in tracks:
		if not track is Resource:
			continue
		for event in track.call("sorted_events"):
			result.append(event)
	result.sort_custom(func(a: Resource, b: Resource) -> bool:
		var a_position := float(a.call("beat_position"))
		var b_position := float(b.call("beat_position"))
		if is_equal_approx(a_position, b_position):
			return str(a.get("event_type")) < str(b.get("event_type"))
		return a_position < b_position
	)
	return result


func is_empty() -> bool:
	return all_events().is_empty()