extends Control

var values: PackedFloat32Array = []
var accent := Color.WHITE
var value_range := Vector2(0.0, 100.0)


func set_values(next_values: Array, next_accent: Color, next_range := Vector2(0.0, 100.0)) -> void:
	values = PackedFloat32Array(next_values)
	accent = next_accent
	value_range = next_range
	queue_redraw()


func _draw() -> void:
	if values.size() < 2:
		if values.size() == 1:
			draw_circle(Vector2(size.x - 4.0, size.y * 0.5), 3.0, accent)
		return
	var span: float = maxf(0.0001, value_range.y - value_range.x)
	var points := PackedVector2Array()
	var count: int = values.size()
	for index in range(count):
		var x: float = lerpf(0.0, size.x, float(index) / float(count - 1))
		var ratio: float = clampf((values[index] - value_range.x) / span, 0.0, 1.0)
		var y: float = lerpf(size.y, 0.0, ratio)
		points.append(Vector2(x, y))
	draw_polyline(points, accent, 2.0, true)
	draw_circle(points[-1], 3.0, accent)