module Fog
  module Generators
    module Compute
      module VcloudDirector
        # This is the data structure it accepts, this is the output of
        # #get_vm_customization:
        #
        #   {:type=>"application/vnd.vmware.vcloud.guestCustomizationSection+xml",
        #    :href=>
        #     "https://example.com/api/vApp/vm-2bbbf556-55dc-4974-82e6-aa6e814f0b64/guestCustomizationSection/",
        #    :id=>"vm-2bbbf556-55dc-4974-82e6-aa6e814f0b64",
        #    :enabled=>false,
        #    :change_sid=>false,
        #    :virtual_machine_id=>"2bbbf556-55dc-4974-82e6-aa6e814f0b64",
        #    :join_domain_enabled=>false,
        #    :use_org_settings=>false,
        #    :admin_password_enabled=>false,
        #    :admin_password_auto=>true,
        #    :reset_password_required=>false,
        #    :customization_script=>"hola\nmundo",
        #    :has_customization_script=>true,
        #    :computer_name=>"DEVWEB-001"}
        #
        # This is what it generates:
        #
        #   <vcloud:GuestCustomizationSection
        #     xmlns:ovf="http://schemas.dmtf.org/ovf/envelope/1"
        #     xmlns:vcloud="http://www.vmware.com/vcloud/v1.5"
        #     href="https://vcloud.example.com/api/vApp/vm-55cc91f2-7e12-48d4-ad90-6f637a51fd88/guestCustomizationSection/"
        #     ovf:required="false"
        #     type="application/vnd.vmware.vcloud.guestCustomizationSection+xml">
        #     <ovf:Info>Specifies Guest OS Customization Settings</ovf:Info>
        #     <vcloud:Enabled>true</vcloud:Enabled>
        #     <vcloud:ChangeSid>true</vcloud:ChangeSid>
        #     <vcloud:VirtualMachineId>55cc91f2-7e12-48d4-ad90-6f637a51fd88</vcloud:VirtualMachineId>
        #     <vcloud:JoinDomainEnabled>false</vcloud:JoinDomainEnabled>
        #     <vcloud:UseOrgSettings>false</vcloud:UseOrgSettings>
        #     <vcloud:AdminPasswordEnabled>true</vcloud:AdminPasswordEnabled>
        #     <vcloud:AdminPasswordAuto>true</vcloud:AdminPasswordAuto>
        #     <vcloud:ResetPasswordRequired>false</vcloud:ResetPasswordRequired>
        #     <vcloud:ComputerName>DEVWEB-001</vcloud:ComputerName>
        #   </vcloud:GuestCustomizationSection>
        #
        # @see http://pubs.vmware.com/vcd-51/topic/com.vmware.vcloud.api.reference.doc_51/doc/types/GuestCustomizationSectionType.html
        class Customization
          def initialize(attrs={})
            @attrs = attrs
          end

          def generate_xml
            output = ""
            output << header
            output << body(@attrs)
            output << tail
            output
          end

          private

          def header
            <<-END
            <GuestCustomizationSection xmlns="http://www.vmware.com/vcloud/v1.5"
              xmlns:ovf="http://schemas.dmtf.org/ovf/envelope/1"
              type="application/vnd.vmware.vcloud.guestCustomizationSection+xml">
            END
          end

          # The order matters: http://communities.vmware.com/thread/448760?start=0&tstart=0
          #
          # CustomizationScript: Script to run on guest customization. You
          # could use XML escape sequence &#13; to make multiple lines script.
          # The script could contain any UNICODE symbol by specifying its
          # number in format &#xxxx; where xxxx is the number. The predefined
          # symbols in the XML are:
          #   * & &amp;
          #   * < &lt;
          #   * > &gt;
          #   * " &quot;
          #   * ' &apos;
          def body(opts={})
            <<-END
              <ovf:Info>Specifies Guest OS Customization Settings</ovf:Info>
              <Enabled>#{opts[:enabled]}</Enabled>
              <ChangeSid>#{opts[:change_sid]}</ChangeSid>
              <VirtualMachineId>#{opts[:virtual_machine_id]}</VirtualMachineId>
              <JoinDomainEnabled>#{opts[:join_domain_enabled]}</JoinDomainEnabled>
              <UseOrgSettings>#{opts[:use_org_settings]}</UseOrgSettings>
              <AdminPasswordEnabled>#{opts[:admin_password_enabled]}</AdminPasswordEnabled>
              <AdminPasswordAuto>#{opts[:admin_password_auto]}</AdminPasswordAuto>
              <ResetPasswordRequired>#{opts[:reset_password_required]}</ResetPasswordRequired>
              <CustomizationScript>#{CGI::escapeHTML(opts[:customization_script]).gsub(/\r/, "&#13;")}</CustomizationScript>
              <ComputerName>#{opts[:computer_name]}</ComputerName>
            END
          end

          def tail
            <<-END
            </GuestCustomizationSection>
            END
          end
        end
      end
    end
  end
end