module Fog
  module AWS
    module EC2
      class Real

        # Create a snapshot of an EBS volume and store it in S3
        #
        # ==== Parameters
        # * volume_id<~String> - Id of EBS volume to snapshot
        #
        # ==== Returns
        # * response<~Excon::Response>:
        #   * body<~Hash>:
        #     * 'progress'<~String> - The percentage progress of the snapshot
        #     * 'requestId'<~String> - id of request
        #     * 'snapshotId'<~String> - id of snapshot
        #     * 'startTime'<~Time> - timestamp when snapshot was initiated
        #     * 'status'<~String> - state of snapshot
        #     * 'volumeId'<~String> - id of volume snapshot targets
        def create_snapshot(volume_id, description = nil)
          request(
            'Action'      => 'CreateSnapshot',
            'Description' => description,
            'VolumeId'    => volume_id,
            :parser       => Fog::Parsers::AWS::EC2::CreateSnapshot.new
          )
        end

      end

      class Mock

        def create_snapshot(volume_id, description = nil)
          response = Excon::Response.new
          if volume = @data[:volumes][volume_id]
            response.status = 200
            snapshot_id = Fog::AWS::Mock.snapshot_id
            data = {
              'description' => description,
              'ownerId'     => @owner_id,
              'progress'    => nil,
              'snapshotId'  => snapshot_id,
              'startTime'   => Time.now,
              'status'      => 'pending',
              'volumeId'    => volume_id,
              'volumeSize'  => volume['size']
            }
            @data[:snapshots][snapshot_id] = data
            response.body = {
              'requestId' => Fog::AWS::Mock.request_id
            }.merge!(data)
          else
            response.status = 400
            raise(Excon::Errors.status_error({:expects => 200}, response))
          end
          response
        end

      end
    end
  end
end