"""
Manage your Anaconda Team Edition server-side settings

###### Set server-side settings

You can add a site named **site_name** like this:

    conda repo admin --set SETTING_NAME SETTING_VALUE

Currently supported settings are:

    - `user_channel_autocreate` - if True, a user's channel is created automatically on first login

###### Show server-side settings

Yuo can see current settings:

    conda repo admin --show
"""
from argparse import RawDescriptionHelpFormatter
import logging

from .base import SubCommandBase
from .. import errors
from ..utils.format import SettingsFormatter
from ..utils.yaml import safe_load


logger = logging.getLogger('repo_cli')


SETTINGS_VALIDATOR = {
    'user_channel_autocreate': safe_load
}


class SubCommand(SubCommandBase):
    name = 'admin'

    def main(self):

        if self.args.show:
            self.show_settings()
            return

        if self.args.get:
            self.show_settings(self.args.get)
            return

        if self.args.set:
            self.update_settings(self.args.set)
            return

        raise NotImplementedError('Please use command options')

    def show_settings(self, key=None):
        settings = self.api.get_system_settings()
        if key is not None:
            if key not in settings:
                raise errors.RepoCLIError('%s is an unknown admin setting' % key)
            settings = {
                key: settings[key]
            }

        self.log.info(SettingsFormatter.format_object_as_list(settings))

    def update_settings(self, args):
        data = {}
        for key, value in args:
            if key not in SETTINGS_VALIDATOR:
                raise errors.RepoCLIError('%s is an unknown admin setting' % key)
            data[key] = SETTINGS_VALIDATOR[key](value)

        settings = self.api.get_system_settings()
        settings.update(data)
        self.api.update_system_settings(settings)

        self.log.info('Anaconda Team Edition settings are updated')

    def add_parser(self, subparsers):
        description = 'Anaconda Team Edition admin settings'
        parser = subparsers.add_parser('admin',
                                       help=description,
                                       description=description,
                                       epilog=__doc__,
                                       formatter_class=RawDescriptionHelpFormatter)

        agroup = parser.add_argument_group('actions')

        agroup.add_argument('--set', nargs=2, action='append', default=[],
                            help='sets a server setting value: name value', metavar=('name', 'value'))
        agroup.add_argument('--get', metavar='name',
                            help='get value: name')
        agroup.add_argument('--show', action='store_true', default=False,
                            help='show all variables')

        parser.set_defaults(main=self.main, sub_parser=parser)