import click
from curator.cli_singletons.object_class import cli_action
from curator.cli_singletons.utils import get_width, json_to_dict, validate_filter_json

@click.command(context_settings=get_width())
@click.option('--name', type=str, help='Alias name', required=True)
@click.option('--add', callback=validate_filter_json, help='JSON array of filters selecting indices to ADD to alias', default=None)
@click.option('--remove', callback=validate_filter_json, help='JSON array of filters selecting indices to REMOVE from alias', default=None)
@click.option('--warn_if_no_indices', is_flag=True, help='Do not raise exception if there are no actionable indices in add/remove')
@click.option('--extra_settings', help='JSON version of extra_settings (see documentation)', callback=json_to_dict)
@click.pass_context
def alias(ctx, name, add, remove, warn_if_no_indices, extra_settings):
    """
    Add/Remove Indices to/from Alias
    """
    manual_options = {
        'name': name,
        'extra_settings': extra_settings,
    }
    # ctx.info_name is the name of the function or name specified in @click.command decorator
    ignore_empty_list = warn_if_no_indices
    action = cli_action(
        ctx.info_name, 
        ctx.obj['config']['client'], 
        manual_options,
        [], # filter_list is empty in our case
        ignore_empty_list,
        add=add, remove=remove, warn_if_no_indices=warn_if_no_indices, # alias specific kwargs
    )
    action.do_singleton_action(dry_run=ctx.obj['dry_run'])