- release_tracks: [ALPHA, BETA, GA]
  help_text:
    brief: Describe the given composite index.
    description: Describe the given composite index.
    examples: |
      The following command describes the composite index with ID `3421ef`:

        $ {command} 3421ef

        $ {command} 3421ef --database=(default)

  request:
    collection: firestore.projects.databases.collectionGroups.indexes

  arguments:
    resource:
      help_text: Index to describe.
      spec: !REF googlecloudsdk.command_lib.firestore.resources:index
      removed_flags:
      - collection-group

  output:
    # This format string gets the field config table (fieldPath,order,arrayConfig) to show up as
    # additional columns in the same row, as opposed to indented on the next line. Note that the
    # double quotes are needed as opposed to a multi-line YAML string, since the latter escapes
    # newline characters which we need to provide to .join() in order to get each field onto its
    # own line.
    #
    # We could also use
    # format: |
    #   table[box](
    #     name.basename(),
    #     name.segment(-3):label=COLLECTION_GROUP,
    #     queryScope,
    #     state,
    #     fields.slice(:-1):format="table(fieldPath,order,arrayConfig)")
    # if we didn't care about the field config info showing up as columns in the existing row.
    #
    # TODO(b/120985936): Use an inline nested table when that's made possible
    format: "table[all-box](\
               name.basename(),\
               name.segment(-3):label=COLLECTION_GROUP,\
               queryScope,\
               state,\
               apiScope,\
               fields.*extract('fieldPath').*flatten().join('\n'):label=FIELD_PATHS,\
               fields.*extract('order').*flatten().join('\n'):label=ORDER,\
               fields.*extract('arrayConfig').*flatten().join('\n'):label=ARRAY_CONFIG,\
               fields.*extract('vectorConfig').*extract('dimension').*flatten().join('\n'):label=VECTOR_CONFIG)"
    release_tracks: [BETA, GA]