class RPiLed

# File lib/rpi_led.rb, line 13
def initialize(pin_num, brightness: 100, smooth: true, transition_time: 1.5)

  @smooth, @transition_time = smooth, transition_time
  super(pin_num.to_i, duty_cycle: brightness)
  @brightness = @duty_cycle

end

# File lib/rpi_led.rb, line 21
def brighter()

  return if @brightness == 100
  increase = @brightness <= 90 ? 10 : 100 - @brightness
  self.brightness = @brightness + increase
  
end

# File lib/rpi_led.rb, line 29
def brightest()
  self.brightness = 100
end

# File lib/rpi_led.rb, line 33
def brightness=(val)
  
  @brightness = val.round(2)

  return self.duty_cycle = val  unless @smooth

  a = if val > @duty_cycle then
    (@duty_cycle..val).step(0.01).to_a
  else
    (val..@duty_cycle).step(0.01).to_a.reverse
  end

  duration = @transition_time / a.length
  Thread.new { a.each {|x| self.duty_cycle = x; sleep duration } }
  

end

# File lib/rpi_led.rb, line 53
def dimmer()

  return if @brightness <= 2
  decrease = brightness > 10 ? 10 : 2
  self.brightness = @brightness - decrease

end

# File lib/rpi_led.rb, line 107
def dimmer_off()
  
  # up to 100% duty cycle (brightest)

  (50..100).step(0.25).to_a.reverse.each do |x|
    @pwm.duty_cycle = x
    sleep 0.006
  end


  # up to 50% duty cycle (brighter)

  (10..50).step(0.125).to_a.reverse.each do |x|
    @pwm.duty_cycle = x
    sleep 0.007
  end

  # up to 10% duty cycle (bright)

  (0.8..10).step(0.125).to_a.reverse.each do |x|
    @pwm.duty_cycle = x
    sleep 0.0085
  end

  @pwm.frequency = 40
  (0.125..0.8).step(0.06).to_a.reverse.each do |x|
    @pwm.duty_cycle = x
    sleep 0.006
  end
  @pwm.duty_cycle = 0.01
  @pwm.frequency = 10
  sleep 1.0
  @pwm.stop
end

# File lib/rpi_led.rb, line 65
def dimmer_on()
  
  @pwm.start 0
  @pwm.frequency = 5
  @pwm.duty_cycle = 0.001
  sleep 0.5
  @pwm.frequency = 50
  sleep 0.2
  @pwm.duty_cycle = 0.006
  # dim
  @pwm.frequency = 70
  (0.125..1).step(0.06) do |x|
    @pwm.duty_cycle = x
    sleep 0.06
  end
  @pwm.frequency = 100

  # up to 10% duty cycle (bright)

  (1..10).step(0.125) do |x|
    @pwm.duty_cycle = x
    sleep 0.05
  end

  # up to 50% duty cycle (brighter)

  (10..50).step(0.125) do |x|
    @pwm.duty_cycle = x
    sleep 0.01
  end

  # up to 100% duty cycle (brightest)

  (50..100).step(0.25) do |x|
    @pwm.duty_cycle = x
    sleep 0.007
  end


  @pwm.duty_cycle = 100    
end

# File lib/rpi_led.rb, line 61
def dimmest()
  self.brightness = 0.1
end