import click
import ssl
from ldap3 import Server, Connection, Tls


@click.group()
@click.option('--server', default='edir1.rz.hs-fulda.de', help='LDAP server URL')
@click.option('--username', prompt=True, default='cn=fdhpc,ou=AI,o=FH-Fulda', help='LDAP bind username')
@click.option('--password', prompt=True, hide_input=True, help='LDAP bind password')
@click.pass_context
def cli(ctx, server, username, password):
  tls = Tls(validate=ssl.CERT_REQUIRED,
            version=ssl.PROTOCOL_TLSv1_2,
            ciphers="AES256-GCM-SHA384") 
  server = Server(server, tls=tls, get_info="ALL", use_ssl=True)
  ctx.obj = Connection(server,
                       username,
                       password,
                       auto_bind=True)


@cli.command()
@click.pass_context
def list(ctx):
  ctx.obj.search('o=FH-Fulda', '''(&
    (cn=fd*)
    (objectClass=inetOrgPerson)
    (groupMembership=cn=ORG-AI-HPC,ou=AI,o=FH-Fulda)
    (!
      (|
        (description=*funktion*)
        (loginDisabled=true)
        (sn=fd*)
      )
    )
  )''',
  attributes = ['cn', 'member', 'sn', 'givenName'])

  for e in ctx.obj.entries:
      click.echo(f'{click.style(e.cn, fg="blue", bold=True)}: {e.sn}, {e.givenName}')


def find(ctx, name):
  from ldap3.utils.conv import escape_filter_chars

  ctx.obj.search('o=FH-Fulda', f'''(&
    (cn={escape_filter_chars(name)})
    (objectClass=inetOrgPerson)
    (!
      (|
        (description=*funktion*)
        (loginDisabled=true)
        (sn=fd*)
      )
    )
  )''')

  if not ctx.obj.entries:
    ctx.fail(f'No user found: {name}')

  return ctx.obj.entries[0].entry_dn



@cli.command()
@click.argument('name', nargs=-1, required=True)
@click.pass_context
def add(ctx, name):
  members = [find(ctx, name) for name in name]
  ctx.obj.extend.novell.add_members_to_groups(members, 'cn=ORG-AI-HPC,ou=AI,o=FH-Fulda')


@cli.command()
@click.pass_context
@click.argument('name', nargs=-1, required=True)
def remove(ctx, name):
  members = [find(ctx, name) for name in name]
  ctx.obj.extend.novell.remove_members_from_groups(members, 'cn=ORG-AI-HPC,ou=AI,o=FH-Fulda')


if __name__ == '__main__':
  cli()