class MemWatcher

# File lib/mem-watcher/mem-watcher.rb, line 5
def self.watch(args={})
  new.watch(args)
end

# File lib/mem-watcher/mem-watcher.rb, line 9
def watch(args={})
  return false unless correct_env?(args)
  if is_device?
    NSLog("Sorry, you can not run mem-watcher on a device.")
    false
  else
    parent_view = args[:parent_view] if args[:parent_view]
    parent_view ||= UIApplication.sharedApplication.delegate.window if UIApplication.sharedApplication.delegate.respond_to?(:window)
    parent_view || abort("MemWatcher needs a `parent_view:` view or access to the window in your AppDelegate via a `window` accessor.")
    parent_view.addSubview label
    print "Starting MemWatcher..."
    start_watcher
    puts "done."

    true
  end
end

# File lib/mem-watcher/mem-watcher.rb, line 39
def correct_env?(args={})
  args[:env] ||= [ "development" ]
  Array(args[:env]).map(&:to_s).include?(RUBYMOTION_ENV)
end

# File lib/mem-watcher/mem-watcher.rb, line 61
def cpu_memory
  output = `ps -p #{pid} -o %cpu,%mem`
  output.split("\n").last.strip.split(" ").map(&:strip)
end

# File lib/mem-watcher/mem-watcher.rb, line 53
def every(interval, user_info=nil, &fire)
  NSTimer.scheduledTimerWithTimeInterval(interval, target: fire, selector: 'call:', userInfo: user_info, repeats: true)
end

# File lib/mem-watcher/mem-watcher.rb, line 29
def is_device?
  @_device_state ||= begin
    if UIDevice.currentDevice.systemVersion.to_i >= 9
      !!NSBundle.mainBundle.bundlePath.start_with?('/var/')
    else
      !!(UIDevice.currentDevice.model =~ /simulator/i).nil?
    end
  end
end

# File lib/mem-watcher/mem-watcher.rb, line 66
def label
  @label ||= begin
    l = UILabel.alloc.initWithFrame([[ 5, 20 ], [ 50, 24 ]])
    l.backgroundColor = UIColor.colorWithWhite(1.0, alpha: 0.8)
    l.layer.cornerRadius = 5
    l.layer.masksToBounds = true
    l.font = UIFont.systemFontOfSize(10.0)
    l.text = "Loading..."
    l.sizeToFit
    l
  end
end

# File lib/mem-watcher/mem-watcher.rb, line 57
def pid
  @pid ||= Process.pid
end

# File lib/mem-watcher/mem-watcher.rb, line 44
def start_watcher
  every 1 do
    self.cpu, self.memory = cpu_memory
    label.text = "#{self.memory} MB #{self.cpu}%"
    label.sizeToFit
    label.superview.bringSubviewToFront(label)
  end
end