class VagrantVbguest::Machine

# File lib/vagrant-vbguest/machine.rb, line 8
def initialize vm, options
  @vm       = vm
  @env      = vm.env
  @options  = options

  @logger = Log4r::Logger.new("vagrant::plugins::vbguest-machine")
  @logger.debug("initialize vbguest machine for VM '#{vm.name}' (#{vm.to_s})")

  @installer = Installer.new vm, options
end

# File lib/vagrant-vbguest/machine.rb, line 78
def info
  {
    :vm_name => vm.name,
    :host_version => installer.host_version,
    :guest_version => installer.guest_version
  }
end

# File lib/vagrant-vbguest/machine.rb, line 34
def install
  return env.ui.warn(I18n.t("vagrant_vbguest.skipped_installation")) if options[:no_install] && !options[:force]
  guest_additions_state.trigger :install
end

# File lib/vagrant-vbguest/machine.rb, line 48
def installation_ran?; guest_additions_state.state == :installed end

# File lib/vagrant-vbguest/machine.rb, line 52
def reboot;  box_state.trigger :reboot end

# File lib/vagrant-vbguest/machine.rb, line 53
def reboot?; box_state.state == :rebooted end

# File lib/vagrant-vbguest/machine.rb, line 39
def rebuild
  return env.ui.warn(I18n.t("vagrant_vbguest.skipped_rebuild")) if options[:no_install] && !options[:force]
  guest_additions_state.trigger :rebuild
end

# File lib/vagrant-vbguest/machine.rb, line 50
def rebuilt?; guest_additions_state.state == :rebuilt end

# File lib/vagrant-vbguest/machine.rb, line 19
def run
  current_state = state
  runlist = steps(current_state)
  @logger.debug("Runlist for state #{current_state} is: #{runlist}")
  while (command = runlist.shift)
    @logger.debug("Running command #{command} from runlist")
    if !self.send(command)
      env.ui.error('vagrant_vbguest.machine_loop_guard', :command => command, :state => current_state)
      return false
    end
    return run if current_state != state
  end
  true
end

# File lib/vagrant-vbguest/machine.rb, line 44
def start
  guest_additions_state.trigger :start
end

# File lib/vagrant-vbguest/machine.rb, line 49
def started?; guest_additions_state.state == :started end

# File lib/vagrant-vbguest/machine.rb, line 66
def state
  guest_version = installer.guest_version(true)
  host_version  = installer.host_version
  running = installer.running?
  @logger.debug("Current states for VM '#{vm.name}' are : guest_version=#{guest_version} : host_version=#{host_version} : running=#{running}")

  return :clean       if !guest_version
  return :unmatched   if host_version != guest_version
  return :not_running if !running
  return :ok
end

# File lib/vagrant-vbguest/machine.rb, line 55
def steps(state)
  case state
  when :clean, :unmatched
    [:install]
  when :not_running
    installation_ran? ? [:reboot] : [:start, :rebuild, :reboot]
  else
    []
  end
end

# File lib/vagrant-vbguest/machine.rb, line 100
def box_state
  @box_state ||= MicroMachine.new(:first_boot).tap { |m|
    m.when :reboot, :first_boot => :rebooted
  }
end

# File lib/vagrant-vbguest/machine.rb, line 88
def guest_additions_state
  @guest_additions_state ||= MicroMachine.new(:pending).tap { |m|
    m.when :install, :pending => :installed
    m.when :start,   :pending => :started
    m.when :rebuild, :pending => :rebuilt, :started => :rebuilt

    m.on(:installed) { installer.install }
    m.on(:started)   { installer.start }
    m.on(:rebuilt)   { installer.rebuild }
  }
end