#!/usr/bin/env python3
from pprint import pformat as pp
from getpass import getpass

from phi.config import get_config
from phi.logging import setup_logging, get_logger
from phi import cli
import phi.ldap.client
from phi.ldap.user import get_user_by_uid, add_user, delete_user
from phi.ldap.group import get_group_by_cn, get_all_groups, add_group_member

log = get_logger(__name__)


@cli.register('dispaly user fields', ['user identifier'])
def showuser(uid):
    user = get_user_by_uid(client, uid)
    if user is None:
        print('User {} not found'.format(uid))
        return

    print(pp(user))


@cli.register('add a new user', ['user identifier'])
def adduser(uid):
    def ask(prompt, default):
        full_prompt = '{} [{}] '.format(prompt, default)
        return input(full_prompt) or default

    user = get_user_by_uid(client, uid)
    if user is not None:
        print("User {} already existing".format(uid))
        return

    cn = ask('Common name:', uid)
    sn = ask('Last name:', uid)
    mail = ask('Mail:', '{}@localhost'.format(uid))

    password = getpass()
    pass_check = getpass('Retype password: ')
    if password != pass_check:
        print('Password not matching')
        return

    add_user(client, uid, cn, sn, mail, password)

    # Check
    user = get_user_by_uid(client, uid)
    print()
    print(pp(user))


@cli.register('delete an user', ['user identifier'])
def deluser(uid):
    check = input('Are you sure? [y/N] ') or 'N'
    if check.lower() != 'y':
        print('Ok then')
        return

    user = get_user_by_uid(client, uid)
    if user is not None:
        delete_user(client, user)
        print('Done')
    else:
        print('User {} not found'.format(uid))


@cli.register('show a group', ['group common name'])
def showgroup(cn):
    group = get_group_by_cn(client, cn)
    if group is None:
        print('Group {} not found'.format(gcn))
        return

    print(pp(group))


@cli.register('list all groups')
def listgroups():
    groups = get_all_groups(client)

    for group in groups:
        print(group['cn'])


@cli.register('add an user to a group',
             ['user identifier', 'group common name'])
def addtogroup(uid, gcn):
    user = get_user_by_uid(client, uid)
    group = get_group_by_cn(client, gcn)

    if user is None:
        print('User {} not found'.format(uid))
        return

    if group is None:
        print('Group {} not found'.format(gcn))
        return

    if uid in group['members']:
        print('User {} is already in group {}'.format(uid, gcn))
        return

    add_group_member(client, group, user)


if __name__ == '__main__':
    cli.add_arg('--config', 'config.yml', 'custom configuration file')
    args = cli.get_args()

    config_file = args['config']

    config_file, config = get_config(config_file)
    setup_logging(config.get('logging', {}))
    log.info("Using configuration at '{}':\n{}"
             .format(config_file, pp(config)))

    # TODO: check fields in config
    client = phi.ldap.client.Client(**config['ldap'])

    log.info('Opening LDAP client')
    client.open()

    log.info('Arguments: {}'.format(pp(args)))

    cli.run(args)

    log.info('Closing LDAP client')
    client.close()