extends Control

@export var audio_player: AudioStreamPlayer

var spectrum_instance
const NUM_BARS = 64  # Number of frequency bands to display
const MAX_FREQ = 1000  # Frequency range to analyze
var bars = []
@export var shuffle_freq = false
@export var flip_y = false

var color_gradient := Gradient.new()  # Dynamic color transitions


func _ready():
	position = Vector2(0, get_viewport_rect().size.y - 150)
		# Set up color gradient (Blue → Purple → Red)
	scale = Vector2(1.5, 1.5)
	color_gradient.add_point(0.0, Color(0.2, 1.0, 0.8))  # Cyan
	color_gradient.add_point(0.5, Color(0.6, 0.2, 1.0))  # Purple
	color_gradient.add_point(1.0, Color(1.0, 0.2, 0.2))  # Red
	spectrum_instance = AudioServer.get_bus_effect_instance(1, 0)  # Bus 1, Effect 0
	create_bars()

func create_bars():
	for i in range(NUM_BARS):
		var bar = ColorRect.new()
		bar.color = Color(0.2, 0.8, 1.0)

		# Set anchors so position/size are relative to top-left
		bar.set_anchors_preset(Control.PRESET_BOTTOM_LEFT)
		
		# Position each bar starting from the bottom left
		bar.rect_position = Vector2(i * 10, 0)  # X is offset, Y = 0 at bottom
		bar.rect_size = Vector2(8, 1)  # Start with a minimal height

		add_child(bar)
		bars.append(bar)

func _process(delta):
	if not spectrum_instance:
		return
	var max_freq_amp = bars.reduce(func(m, b): return b if b.rect_size.y > m.rect_size.y else m).rect_size.y
	
	for i in range(NUM_BARS):
		var freq_start = (i * MAX_FREQ) / NUM_BARS
		var freq_end = ((i + 1) * MAX_FREQ) / NUM_BARS
		var magnitude = spectrum_instance.get_magnitude_for_frequency_range(freq_start, freq_end).length()
		var target_height = magnitude * 1000 * 2
		bars[i].rect_size.y = lerp(bars[i].rect_size.y, target_height, 0.2)
		bars[i].rect_position.y = -bars[i].rect_size.y  # Move bar so it grows upward
  # Smooth animation
		
		var intensity = bars[i].rect_size.y / (max_freq_amp * 1.0) if max_freq_amp > 0 else 0.0
#		intensity *= 1000
		intensity = clamp(intensity, 0.0, 1.0)  # Keep within valid range

		# Get dynamic color from gradient
		var new_color = color_gradient.sample(intensity)
		bars[i].color = new_color
		if flip_y:
			bars[i].scale.y = -1
	
	if shuffle_freq:
			bars.shuffle()