class Chamomile::Timer

# File lib/chamomile/components/timer.rb, line 27
def initialize(timeout:, interval: 1.0)
  @id = self.class.next_id
  @timeout = timeout.to_f
  @interval = interval
  @remaining = @timeout
  @tag = 0
  @running = false
end

# File lib/chamomile/components/timer.rb, line 13
def self.next_id
  @id_mutex.synchronize do
    if Process.pid != @id_pid
      @id_pid = Process.pid
      @next_id = 0
      @id_mutex = Mutex.new
    end
    @next_id += 1
    "#{@id_pid}-tm-#{@next_id}"
  end
end

# File lib/chamomile/components/timer.rb, line 73
def handle(msg)
  case msg
  when TimerTickMsg
    return unless msg.id == @id && msg.tag == @tag

    @remaining = [(@remaining - @interval), 0.0].max
    @tag += 1

    if @remaining <= 0
      @running = false
      timeout_cmd
    else
      tick_cmd
    end
  end
end

# File lib/chamomile/components/timer.rb, line 58
def reset
  @remaining = @timeout
  @running = false
  @tag += 1
  self
end

# File lib/chamomile/components/timer.rb, line 65
def running?
  @running
end

# File lib/chamomile/components/timer.rb, line 36
def start_cmd
  return nil if @running || timed_out?

  @running = true
  tick_cmd
end

# File lib/chamomile/components/timer.rb, line 43
def stop
  @running = false
  @tag += 1
  self
end

# File lib/chamomile/components/timer.rb, line 69
def timed_out?
  @remaining <= 0
end

# File lib/chamomile/components/timer.rb, line 49
def toggle
  if @running
    stop
    nil
  else
    start_cmd
  end
end

# File lib/chamomile/components/timer.rb, line 92
def view
  total = @remaining.ceil.to_i
  total = 0 if total.negative?
  hours = total / 3600
  minutes = (total % 3600) / 60
  seconds = total % 60

  if hours.positive?
    format("%d:%02d:%02d", hours, minutes, seconds)
  else
    format("%02d:%02d", minutes, seconds)
  end
end