require "vagrant/action/builder"

module VagrantPlugins
  module ProviderVirtualBox
    module Action
      autoload :Boot, File.expand_path("../action/boot", __FILE__)
      autoload :CheckAccessible, File.expand_path("../action/check_accessible", __FILE__)
      autoload :CheckCreated, File.expand_path("../action/check_created", __FILE__)
      autoload :CheckGuestAdditions, File.expand_path("../action/check_guest_additions", __FILE__)
      autoload :CheckRunning, File.expand_path("../action/check_running", __FILE__)
      autoload :CheckVirtualbox, File.expand_path("../action/check_virtualbox", __FILE__)
      autoload :CleanMachineFolder, File.expand_path("../action/clean_machine_folder", __FILE__)
      autoload :ClearForwardedPorts, File.expand_path("../action/clear_forwarded_ports", __FILE__)
      autoload :ClearNetworkInterfaces, File.expand_path("../action/clear_network_interfaces", __FILE__)
      autoload :ClearSharedFolders, File.expand_path("../action/clear_shared_folders", __FILE__)
      autoload :Created, File.expand_path("../action/created", __FILE__)
      autoload :Customize, File.expand_path("../action/customize", __FILE__)
      autoload :Destroy, File.expand_path("../action/destroy", __FILE__)
      autoload :DestroyConfirm, File.expand_path("../action/destroy_confirm", __FILE__)
      autoload :DestroyUnusedNetworkInterfaces, File.expand_path("../action/destroy_unused_network_interfaces", __FILE__)
      autoload :DiscardState, File.expand_path("../action/discard_state", __FILE__)
      autoload :Export, File.expand_path("../action/export", __FILE__)
      autoload :ForcedHalt, File.expand_path("../action/forced_halt", __FILE__)
      autoload :ForwardPorts, File.expand_path("../action/forward_ports", __FILE__)
      autoload :Import, File.expand_path("../action/import", __FILE__)
      autoload :IsPaused, File.expand_path("../action/is_paused", __FILE__)
      autoload :IsRunning, File.expand_path("../action/is_running", __FILE__)
      autoload :IsSaved, File.expand_path("../action/is_saved", __FILE__)
      autoload :MatchMACAddress, File.expand_path("../action/match_mac_address", __FILE__)
      autoload :MessageNotCreated, File.expand_path("../action/message_not_created", __FILE__)
      autoload :MessageNotRunning, File.expand_path("../action/message_not_running", __FILE__)
      autoload :MessageWillNotDestroy, File.expand_path("../action/message_will_not_destroy", __FILE__)
      autoload :Network, File.expand_path("../action/network", __FILE__)
      autoload :Package, File.expand_path("../action/package", __FILE__)
      autoload :PackageVagrantfile, File.expand_path("../action/package_vagrantfile", __FILE__)
      autoload :PrepareNFSSettings, File.expand_path("../action/prepare_nfs_settings", __FILE__)
      autoload :PrepareForwardedPortCollisionParams, File.expand_path("../action/prepare_forwarded_port_collision_params", __FILE__)
      autoload :PruneNFSExports, File.expand_path("../action/prune_nfs_exports", __FILE__)
      autoload :Resume, File.expand_path("../action/resume", __FILE__)
      autoload :SaneDefaults, File.expand_path("../action/sane_defaults", __FILE__)
      autoload :SetName, File.expand_path("../action/set_name", __FILE__)
      autoload :SetupPackageFiles, File.expand_path("../action/setup_package_files", __FILE__)
      autoload :ShareFolders, File.expand_path("../action/share_folders", __FILE__)
      autoload :Suspend, File.expand_path("../action/suspend", __FILE__)

      # Include the built-in modules so that we can use them as top-level
      # things.
      include Vagrant::Action::Builtin

      # This action boots the VM, assuming the VM is in a state that requires
      # a bootup (i.e. not saved).
      def self.action_boot
        Vagrant::Action::Builder.new.tap do |b|
          b.use CheckAccessible
          b.use CleanMachineFolder
          b.use SetName
          b.use ClearForwardedPorts
          b.use Provision
          b.use EnvSet, :port_collision_repair => true
          b.use PrepareForwardedPortCollisionParams
          b.use HandleForwardedPortCollisions
          b.use PruneNFSExports
          b.use NFS
          b.use PrepareNFSSettings
          b.use ClearSharedFolders
          b.use ShareFolders
          b.use ClearNetworkInterfaces
          b.use Network
          b.use ForwardPorts
          b.use SetHostname
          b.use SaneDefaults
          b.use Customize
          b.use Boot
        end
      end

      # This is the action that is primarily responsible for completely
      # freeing the resources of the underlying virtual machine.
      def self.action_destroy
        Vagrant::Action::Builder.new.tap do |b|
          b.use CheckVirtualbox
          b.use Call, Created do |env1, b2|
            if !env1[:result]
              b2.use MessageNotCreated
              next
            end

            b2.use Call, DestroyConfirm do |env2, b3|
              if env2[:result]
                b3.use ConfigValidate
                b3.use CheckAccessible
                b3.use EnvSet, :force_halt => true
                b3.use action_halt
                b3.use PruneNFSExports
                b3.use Destroy
                b3.use CleanMachineFolder
                b3.use DestroyUnusedNetworkInterfaces
              else
                b3.use MessageWillNotDestroy
              end
            end
          end
        end
      end

      # This is the action that is primarily responsible for halting
      # the virtual machine, gracefully or by force.
      def self.action_halt
        Vagrant::Action::Builder.new.tap do |b|
          b.use CheckVirtualbox
          b.use Call, Created do |env, b2|
            if env[:result]
              b2.use CheckAccessible
              b2.use DiscardState

              b2.use Call, IsPaused do |env2, b3|
                next if !env2[:result]
                b3.use Resume
              end

              b2.use Call, GracefulHalt, :poweroff, :running do |env2, b3|
                if !env2[:result]
                  b3.use ForcedHalt
                end
              end
            else
              b2.use MessageNotCreated
            end
          end
        end
      end

      # This action packages the virtual machine into a single box file.
      def self.action_package
        Vagrant::Action::Builder.new.tap do |b|
          b.use CheckVirtualbox
          b.use Call, Created do |env1, b2|
            if !env1[:result]
              b2.use MessageNotCreated
              next
            end

            b2.use SetupPackageFiles
            b2.use CheckAccessible
            b2.use action_halt
            b2.use ClearForwardedPorts
            b2.use ClearSharedFolders
            b2.use Export
            b2.use PackageVagrantfile
            b2.use Package
          end
        end
      end

      # This action just runs the provisioners on the machine.
      def self.action_provision
        Vagrant::Action::Builder.new.tap do |b|
          b.use CheckVirtualbox
          b.use ConfigValidate
          b.use Call, Created do |env1, b2|
            if !env1[:result]
              b2.use MessageNotCreated
              next
            end

            b2.use Call, IsRunning do |env2, b3|
              if !env2[:result]
                b3.use MessageNotRunning
                next
              end

              b3.use CheckAccessible
              b3.use Provision
            end
          end
        end
      end

      # This action is responsible for reloading the machine, which
      # brings it down, sucks in new configuration, and brings the
      # machine back up with the new configuration.
      def self.action_reload
        Vagrant::Action::Builder.new.tap do |b|
          b.use CheckVirtualbox
          b.use Call, Created do |env1, b2|
            if !env1[:result]
              b2.use MessageNotCreated
              next
            end

            b2.use ConfigValidate
            b2.use action_halt
            b2.use action_start
          end
        end
      end

      # This is the action that is primarily responsible for resuming
      # suspended machines.
      def self.action_resume
        Vagrant::Action::Builder.new.tap do |b|
          b.use CheckVirtualbox
          b.use Call, Created do |env, b2|
            if env[:result]
              b2.use CheckAccessible
              b2.use EnvSet, :port_collision_repair => false
              b2.use PrepareForwardedPortCollisionParams
              b2.use HandleForwardedPortCollisions
              b2.use Resume
            else
              b2.use MessageNotCreated
            end
          end
        end
      end

      # This is the action that will exec into an SSH shell.
      def self.action_ssh
        Vagrant::Action::Builder.new.tap do |b|
          b.use CheckVirtualbox
          b.use CheckCreated
          b.use CheckAccessible
          b.use CheckRunning
          b.use SSHExec
        end
      end

      # This is the action that will run a single SSH command.
      def self.action_ssh_run
        Vagrant::Action::Builder.new.tap do |b|
          b.use CheckVirtualbox
          b.use CheckCreated
          b.use CheckAccessible
          b.use CheckRunning
          b.use SSHRun
        end
      end

      # This action starts a VM, assuming it is already imported and exists.
      # A precondition of this action is that the VM exists.
      def self.action_start
        Vagrant::Action::Builder.new.tap do |b|
          b.use CheckVirtualbox
          b.use ConfigValidate
          b.use Call, IsRunning do |env, b2|
            # If the VM is running, then our work here is done, exit
            next if env[:result]

            b2.use Call, IsSaved do |env2, b3|
              if env2[:result]
                # The VM is saved, so just resume it
                b3.use action_resume
                next
              end

              b3.use Call, IsPaused do |env3, b4|
                if env3[:result]
                  b4.use Resume
                  next
                end

                # The VM is not saved, so we must have to boot it up
                # like normal. Boot!
                b4.use action_boot
              end
            end
          end
        end
      end

      # This is the action that is primarily responsible for suspending
      # the virtual machine.
      def self.action_suspend
        Vagrant::Action::Builder.new.tap do |b|
          b.use CheckVirtualbox
          b.use Call, Created do |env, b2|
            if env[:result]
              b2.use CheckAccessible
              b2.use Suspend
            else
              b2.use MessageNotCreated
            end
          end
        end
      end

      # This action brings the machine up from nothing, including importing
      # the box, configuring metadata, and booting.
      def self.action_up
        Vagrant::Action::Builder.new.tap do |b|
          b.use CheckVirtualbox
          b.use ConfigValidate
          b.use Call, Created do |env, b2|
            # If the VM is NOT created yet, then do the setup steps
            if !env[:result]
              b2.use CheckAccessible
              b2.use HandleBoxUrl
              b2.use Import
              b2.use CheckGuestAdditions
              b2.use MatchMACAddress
            end
          end
          b.use action_start
        end
      end
    end
  end
end