Light

extends Light2D

#timer
export(float) var TimerWait = 0.5

#rotation
export(float) var Radius = 0.1
export(float) var RotationSpeed = 2.0

#energy settings
export(float) var EnergyMin = 0.5
export(float) var EnergyMax = 1
export(float) var EnergyStepping = 0.1

var angle = 0
var centre = 0
var timer = 0
var energy_temp = 0
var energy_direction = 0

var rng = RandomNumberGenerator.new()
signal timeout

# Called when the node enters the scene tree for the first time.
func _ready():
    centre = position
    rng.randomize()
    pass # Replace with function body.

# Called every frame. 'delta' is the elapsed time since the previous frame.
func _process(delta):
    timer += delta

    if timer > TimerWait:
        timer = 0
        emit_signal("timeout", timer)

    moveLight(delta)

func handleLight():
    if energy_temp >= EnergyMax:
        energy_direction = 0
    if energy_temp <= EnergyMin:
        energy_direction = 1

    match energy_direction:
        0:
            energy_temp -= EnergyStepping
        1:
            energy_temp += EnergyStepping
    energy = clamp(energy_temp, EnergyMin, EnergyMax)

func moveLight(delta):
         angle += RotationSpeed * delta
         var offset = Vector2(sin(angle), cos(angle)) * Radius
         position = centre + offset

func _on_LightSource_timeout(x):
    handleLight()