require File.join(File.dirname(__FILE__), "..","..","..",
                  "puppet/provider/trove")

Puppet::Type.type(:trove_datastore_version).provide(
  :trove,
  :parent => Puppet::Provider::Trove
) do
  desc <<-EOT
    Trove provider to manage datastore version type.
  EOT

  mk_resource_methods

  @credentials = Puppet::Provider::Openstack::CredentialsV3.new

  def self.prefetch(resource)
    @datastore_version_hash = nil
  end

  def self.datastore_version_hash(datastore)
    @datastore_version_hash ||= build_datastore_version_hash(datastore)
  end

  def datastore_version_hash(datastore)
    self.class.datastore_version_hash(datastore)
  end

  def self.instances
    []
  end

  def exists?
    datastore_version_hash(@resource[:datastore])[@resource[:name]]
  end

  def create
    trove_manage([
      'datastore_version_update',
      "#{@resource[:datastore]}", "#{@resource[:name]}",
      "#{@resource[:manager]}", "#{@resource[:image_id]}",
      "#{@resource[:packages]}", "#{@resource[:active]}"
    ])
  end

  def destroy
    fail("Datastore version cannot be removed")
  end

  private

  def self.build_datastore_version_hash(datastore)
    dvs = {}
    begin
      request('datastore version', 'list', datastore).each do |attrs|
        dvs[attrs[:name]] = attrs
      end
    rescue Puppet::ExecutionFailure => e
      if ! e.message.match("Datastore '#{datastore}' cannot be found")
        raise e
      end
    end
    dvs
  end
end