require 'fog/core/model'

module Fog
  module Compute
    class Google
      class Snapshot < Fog::Model
        identity :name

        attribute :kind
        attribute :self_link         , :aliases => 'selfLink'
        attribute :creation_timestamp, :aliases => 'creationTimestamp'
        attribute :disk_size_gb      , :aliases => 'diskSizeGb'
        attribute :source_disk       , :aliases => 'sourceDisk'
        attribute :source_disk_id    , :aliases => 'sourceDiskId'
        attribute :description
        attribute :status
        attribute :id
        attribute :storage_bytes        , :aliases => 'storageBytes'
        attribute :storage_bytes_status , :aliases => 'storageBytesStatus'

        CREATING_STATE  = 'CREATING'
        DELETING_STATE  = 'DELETING'
        FAILED_STATE    = 'FAILED'
        READY_STATE     = 'READY'
        UPLOADING_STATE = 'UPLOADING'

        def destroy(async=true)
          requires :identity

          data = service.delete_snapshot(identity)
          operation = Fog::Compute::Google::Operations.new(:service => service).get(data.body['name'])
          unless async
            operation.wait_for { ready? }
          end
          operation
        end

        def ready?
          self.status == READY_STATE
        end

        def resource_url
          "#{self.service.project}/global/snapshots/#{name}"
        end
      end
    end
  end
end