module Fog
  module Compute
    class VcloudDirector
      class Real
        # Retrieve a vApp or VM.
        #
        # @param [String] id Object identifier of the vApp or VM.
        # @return [Excon::Response]
        #   * body<~Hash>:
        #
        # @see http://pubs.vmware.com/vcd-51/topic/com.vmware.vcloud.api.reference.doc_51/doc/operations/GET-VApp.html
        # @since vCloud API version 0.9
        def get_vapp(id)
          response = request(
            :expects    => 200,
            :idempotent => true,
            :method     => 'GET',
            :parser     => Fog::ToHashDocument.new,
            :path       => "vApp/#{id}"
          )
          ensure_list! response.body, :Children, :Vm
          response
        end
      end

      class Mock

        def get_vapp(id)

          # Retrieve a vApp or VM.
          #

          case id
          when /^vapp-/
            body = get_mock_vapp_body(id)
          when /^vm-/
            body = get_mock_vm_body(id)
          else
            raise Fog::Compute::VcloudDirector::Forbidden.new(
              'This operation is denied.'
            )
          end

          Excon::Response.new(
            :status => 200,
            :headers => {'Content-Type' => "#{body[:type]};version=#{api_version}"},
            :body => body
          )

        end

        def get_mock_vm_body(id)
          unless vm = data[:vms][id]
            raise Fog::Compute::VcloudDirector::Forbidden.new(
              'This operation is denied.'
            )
          end

          body = {
            :name => vm[:name],
            :href => make_href("vApp/#{id}"),
            :type => "application/application/vnd.vmware.vcloud.vm+xml",
            :status => vm[:status],
            :deployed => vm[:deployed],
            :needsCustomization => vm[:needs_customization],
            :Description => vm[:description],
            :"ovf:VirtualHardwareSection" => get_vm_virtual_hardware_section_body(id, vm),
            :"ovf:OperatingSystemSection" => get_vm_operating_system_section_body(id, vm),
            :NetworkConnectionSection     => get_vm_network_connection_section_body(id, vm),
            :GuestCustomizationSection    => get_vm_guest_customization_section_body(id, vm),
            :RuntimeInfoSection           => get_vm_runtime_info_section_body(id, vm),
            :SnapshotSection              => get_snapshot_section_body(id),
            :DateCreated       => vm[:date_created], # eg "2014-03-16T10:52:31.874Z"
            :VAppScopedLocalId => vm[:parent_vapp].split('-').last, # strip the vapp- prefix
            :"ovfenv:Environment" => get_vm_ovfenv_environment_section_body(id, vm),
            :VmCapabilities => get_vm_capabilities_section_body(id, vm),
            :StorageProfile => get_vm_storage_profile_section_body(id, vm),
          }
          body
        end

        def get_mock_vapp_body(id)

          unless vapp = data[:vapps][id]
            raise Fog::Compute::VcloudDirector::Forbidden.new(
              'This operation is denied.'
            )
          end

          body = {
            :deployed => "true",
            :status => vapp[:status],
            :name => vapp[:name],
            :type => "application/vnd.vmware.vcloud.vApp+xml",
            :href => make_href("vApp/#{id}"),
            :LeaseSettingsSection => get_vapp_lease_settings_section_body(id),
            :"ovf:StartupSection" => get_vapp_ovf_startup_section_body(id, vapp),
            :"ovf:NetworkSection" => get_vapp_ovf_network_section_body(id, vapp),
            :NetworkConfigSection => get_vapp_network_config_section_body(id, vapp),
            :SnapshotSection      => get_snapshot_section_body(id),
            :DateCreated => vapp[:date_created], # eg "2014-03-16T10:52:31.874Z"
            :Owner => get_owner_section_body(id),
            :InMaintenanceMode => "false",
            :Children => {
              :Vm => get_vapp_children_vms_body(id)
            },
          }
          body
        end

        def get_vapp_ovf_network_section_body(id, vapp)
          {}
        end

        def get_vapp_children_vms_body(id)
          child_vms = data[:vms].select do |vm_id, vm_details|
            vm_details[:parent_vapp] == id
          end
          if RUBY_VERSION.to_f < 1.9
            # 1.8 Hash.select returns an Array of [k,v] pairs.
            child_vms = Hash[child_vms]
          end
          child_vms.keys.collect do |vm_id|
            get_mock_vm_body(vm_id)
          end
        end

        def get_vm_ovfenv_environment_section_body(id, vm)
          # TODO: I'm pretty sure this is just repeating info in other
          # sections, and the OVF part of VMs is extremely verbose. It's
          # likely to not be needed in Mock mode
          {}
        end

        def get_vm_storage_profile_section_body(id, vm)
          {
            :type => "application/vnd.vmware.vcloud.vdcStorageProfile+xml",
            :name => "Mock Storage Profile",
            :href => make_href("vdcStorageProfile/12345678-1234-1234-1234-1234500e49a8"),
          }
        end

        def get_vm_virtual_hardware_section_body(id, vm)

          {:xmlns_ns12=>"http://www.vmware.com/vcloud/v1.5",
           :ovf_transport=>"",
           :ns12_href => make_href("vApp/#{id}/virtualHardwareSection/"),
           :ns12_type=>"application/vnd.vmware.vcloud.virtualHardwareSection+xml",
           :"ovf:Info"=>"Virtual hardware requirements",
           :"ovf:System"=>{
             :"vssd:ElementName"=>"Virtual Hardware Family",
             :"vssd:InstanceID"=>"0",
             :"vssd:VirtualSystemIdentifier" => vm[:name],
             :"vssd:VirtualSystemType"=>"vmx-08"
           },
           :"ovf:Item" => get_vm_ovf_item_list(id, vm),
          }
        end

        def get_vm_ovf_item_list(id, vm)
          [
            get_network_cards_rasd_items_list_body(id, vm),
            get_disks_rasd_items_list_body(id, vm),
            get_media_rasd_item_cdrom_body(id, vm),
            get_media_rasd_item_floppy_body(id, vm),
            get_cpu_rasd_item_body(id, vm),
            get_memory_rasd_item_body(id, vm),
          ].compact.flatten
        end


      end

    end
  end
end
