conductor/scripts/musician.gd

#@tool
#@icon(icon_path: String)
class_name Musician
extends AnimatedSprite2D
## Documentation comments

#signal
#enum
#const

@export_group("Input Textures")
@export var solid_texture: Texture2D
@export var outline_texture: Texture2D

@export var beats_per_boost: int = 4
@export var song_tempo: int = 120

@export_enum("sample", "viol", "cello", "bass", "ready") var input_action: String

var decay_length: float
var decay_rate: float
var is_active: bool = false
var is_boosted: bool
var is_over_boosted: bool = false
var seconds_per_beat: float
var useconds_per_beat: int

@onready var audio: AudioStreamPlayer2D = %Audio
@onready var light: PointLight2D = %Light
@onready var occluder: LightOccluder2D = %Occluder
@onready var input_prompt: Sprite2D = %InputPrompt
@onready var volume_bar: ProgressBar = %VolumeBar
@onready var boost_timer: Timer = %BoostTimer

## OVERRIDES

func _ready() -> void:
	light.visible = false
	_connect_signals()

	input_prompt.texture = outline_texture
	seconds_per_beat = 60.0/float(song_tempo)
	decay_length = beats_per_boost * seconds_per_beat
	print("this musician's boosts will last %s seconds" % decay_length)
	boost_timer.wait_time = decay_length
	decay_rate = 80.0 / decay_length
	print("so the volume will drop by %s db per second" % decay_rate)

func _process(delta: float) -> void:
	if is_over_boosted:
		distort_pitch(sin(Time.get_ticks_msec()))
	if is_active and not is_boosted:
		drop_volume(decay_rate * delta)
	volume_bar.value = audio.volume_db

func _unhandled_input(event: InputEvent) -> void:
	if event.is_action_pressed("play_pause"):
		play_pause()
	if event.is_action_pressed(input_action):
		boost_volume()

## CORE
func boost_volume() -> void:
	if is_boosted:
		is_over_boosted = true
	audio.volume_db = 0.0
	is_boosted = true
	boost_timer.start()

func distort_pitch(distortion: float) -> void:
	print("distorting by %s" % distortion)
	audio.pitch_scale += distortion
	print("pitch scale is %s" % audio.pitch_scale)

func drop_volume(d_r: float) -> void:
	audio.volume_db -= d_r

func play_pause() -> void:
	if is_active:
		play("idle")
		audio.stop()
		light.visible = false
		is_active = false
		input_prompt.texture = outline_texture
	else:
		play("default")
		audio.play()
		if not is_boosted:
			is_boosted = true
			boost_timer.start()
		light.visible = true
		is_active = true
		input_prompt.texture = solid_texture

## PRIVATE/HELPER

func _connect_signals() -> void:
	boost_timer.connect("timeout", on_boost_timer_timeout)
	audio.connect("finished", play_pause)

## RECEIVERS

func on_boost_timer_timeout() -> void:
	print("boost over")
	boost_timer.stop()
	is_boosted = false
	is_over_boosted = false
	audio.pitch_scale = 1.0

## SETTERS/GETTERS