# -*- coding: utf-8 -*- #
# Copyright 2013 Google LLC. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#    http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

"""The command to list installed/available gcloud components."""

from __future__ import absolute_import
from __future__ import division
from __future__ import unicode_literals

from googlecloudsdk.calliope import base
from googlecloudsdk.command_lib.components import util
from googlecloudsdk.core import log


class List(base.ListCommand):
  """List the status of all Google Cloud CLI components.

  This command lists all the available components in the Google Cloud CLI. For
  each component, the command lists the following information:

  * Status on your local workstation: not installed, installed (and
    up to date), and update available (installed, but not up to date)
  * Name of the component (a description)
  * ID of the component (used to refer to the component in other
    [{parent_command}] commands)
  * Size of the component

  ## EXAMPLES
  To list the status of all Google Cloud CLI components, run:

    $ {command}

  To show the currently installed version (if any) and the latest available
  version of each component, run:

    $ {command} --show-versions
  """

  @staticmethod
  def Args(parser):
    base.PAGE_SIZE_FLAG.RemoveFromParser(parser)
    base.URI_FLAG.RemoveFromParser(parser)
    parser.add_argument(
        '--only-local-state',
        action='store_true',
        help='Only show locally installed components.',
    )
    parser.add_argument(
        '--show-versions', required=False, action='store_true',
        help='Show installed and available versions of all components.')
    parser.add_argument(
        '--show-hidden', required=False, action='store_true',
        help='Show installed and available versions of all components.',
        hidden=True,
    )
    parser.add_argument(
        '--show-platform',
        required=False,
        action='store_true',
        help='Show operating system and architecture of all components')

  def _SetFormat(self, args):
    attributes = [
        'box',
        'title="Components"'
        ]
    columns = [] if args.only_local_state else ['state.name:label=Status']
    columns.append('name:label=Name')
    if args.show_versions:
      columns.extend([
          'current_version_string:label=Installed:align=right',
          'latest_version_string:label=Latest:align=right',
          ])
    columns.extend([
        'id:label=ID',
        'size.size(zero="",min=1048576):label=Size:align=right',
        ])
    if args.show_platform:
      columns.extend([
          'platform.architecture.id:label=ARCHITECTURE',
          'platform.operating_system.id:label=OPERATING_SYSTEM'
          ])
    args.GetDisplayInfo().AddFormat('table[{attributes}]({columns})'.format(
        attributes=','.join(attributes), columns=','.join(columns)))

  def Run(self, args):
    """Runs the list command."""
    self._SetFormat(args)
    update_manager = util.GetUpdateManager(args)
    result = update_manager.List(show_hidden=args.show_hidden,
                                 only_local_state=args.only_local_state)
    (to_print, self._current_version, self._latest_version) = result
    return to_print

  def Epilog(self, resources_were_displayed):
    if not resources_were_displayed:
      log.status.write('\nNo updates.')
    latest_version_string = ('' if self._latest_version is None
                             else ' [{}]'.format(self._latest_version))
    log.status.write("""\
To install or remove components at your current Google Cloud CLI version [{current}], run:
  $ gcloud components install COMPONENT_ID
  $ gcloud components remove COMPONENT_ID

To update your Google Cloud CLI installation to the latest version{latest}, run:
  $ gcloud components update

""".format(current=self._current_version, latest=latest_version_string))