text: """Usage information of a virtual server."""
  # :license: MIT, see LICENSE for more details.
  
  import click
  
  import SoftLayer
  from SoftLayer.CLI import environment
  from SoftLayer.CLI import exceptions
  from SoftLayer.CLI import formatting
  from SoftLayer.CLI import helpers
  from SoftLayer.utils import clean_time
  
  
  @click.command()
  @click.argument('identifier')
  @click.option('--start_date', '-s', type=click.STRING, required=True, help="Start Date e.g. 2019-3-4 (yyyy-MM-dd)")
  @click.option('--end_date', '-e', type=click.STRING, required=True, help="End Date e.g. 2019-4-2 (yyyy-MM-dd)")
  @click.option('--valid_type', '-t', type=click.STRING, required=True,
                help="Metric_Data_Type keyName e.g. CPU0, CPU1, MEMORY_USAGE, etc.")
  @click.option('--summary_period', '-p', type=click.INT, default=3600,
                help="300, 600, 1800, 3600, 43200 or 86400 seconds")
  @environment.pass_env
  def cli(env, identifier, start_date, end_date, valid_type, summary_period):
      """Usage information of a virtual server."""
  
      vsi = SoftLayer.VSManager(env.client)
      table = formatting.Table(['counter', 'dateTime', 'type'])
      table_average = formatting.Table(['Average'])
  
      vs_id = helpers.resolve_id(vsi.resolve_ids, identifier, 'VS')
  
      result = vsi.get_summary_data_usage(vs_id, start_date=start_date, end_date=end_date,
                                          valid_type=valid_type, summary_period=summary_period)
  
      if len(result) == 0:
          raise exceptions.CLIAbort('No metric data for this range of dates provided')
  
      count = 0
      counter = 0.00
      for data in result:
          if valid_type == "MEMORY_USAGE":
              usage_counter = data['counter'] / 2 ** 30
          else:
              usage_counter = data['counter']
  
          table.add_row([
              round(usage_counter, 2),
              clean_time(data['dateTime']),
              data['type'],
          ])
          counter = counter + usage_counter
          count = count + 1
  
      average = counter / count
  
      env.fout(table_average.add_row([round(average, 2)]))
  
      env.fout(table_average)
      env.fout(table)
  