import os
import sys
import time
import ldap
import logging
import pytest
from lib389 import DirSrv, Entry, tools
from lib389.tools import DirSrvTools
from lib389._constants import *
from lib389.properties import *

log = logging.getLogger(__name__)

installation_prefix = None

ATTRIBUTE_UNIQUENESS_PLUGIN = 'cn=attribute uniqueness,cn=plugins,cn=config'
ENTRY_NAME = 'test_entry'


class TopologyStandalone(object):
    def __init__(self, standalone):
        standalone.open()
        self.standalone = standalone


@pytest.fixture(scope="module")
def topology(request):
    '''
        This fixture is used to standalone topology for the 'module'.
    '''
    global installation_prefix

    if installation_prefix:
        args_instance[SER_DEPLOYED_DIR] = installation_prefix

    standalone = DirSrv(verbose=True)

    # Args for the standalone instance
    args_instance[SER_HOST] = HOST_STANDALONE
    args_instance[SER_PORT] = PORT_STANDALONE
    args_instance[SER_SERVERID_PROP] = SERVERID_STANDALONE
    args_standalone = args_instance.copy()
    standalone.allocate(args_standalone)

    # Get the status of the instance and restart it if it exists
    instance_standalone = standalone.exists()

    # Remove the instance
    if instance_standalone:
        standalone.delete()

    # Create the instance
    standalone.create()

    # Used to retrieve configuration information (dbdir, confdir...)
    standalone.open()

    # clear the tmp directory
    standalone.clearTmpDir(__file__)

    # Here we have standalone instance up and running
    return TopologyStandalone(standalone)


def test_ticket47808_run(topology):
    """
        It enables attribute uniqueness plugin with sn as a unique attribute
        Add an entry 1 with sn = ENTRY_NAME
        Add an entry 2 with sn = ENTRY_NAME
        If the second add does not crash the server and the following search found none,
        the bug is fixed.
    """

    # bind as directory manager
    topology.standalone.log.info("Bind as %s" % DN_DM)
    topology.standalone.simple_bind_s(DN_DM, PASSWORD)

    topology.standalone.log.info("\n\n######################### SETUP ATTR UNIQ PLUGIN ######################\n")

    # enable attribute uniqueness plugin
    mod = [(ldap.MOD_REPLACE, 'nsslapd-pluginEnabled', 'on'), (ldap.MOD_REPLACE, 'nsslapd-pluginarg0', 'sn'), (ldap.MOD_REPLACE, 'nsslapd-pluginarg1', SUFFIX)]
    topology.standalone.modify_s(ATTRIBUTE_UNIQUENESS_PLUGIN, mod)

    topology.standalone.log.info("\n\n######################### ADD USER 1 ######################\n")

    # Prepare entry 1
    entry_name = '%s 1' % (ENTRY_NAME)
    entry_dn_1 = 'cn=%s, %s' % (entry_name, SUFFIX)
    entry_1 = Entry(entry_dn_1)
    entry_1.setValues('objectclass', 'top', 'person')
    entry_1.setValues('sn', ENTRY_NAME)
    entry_1.setValues('cn', entry_name)
    topology.standalone.log.info("Try to add Add %s: %r" % (entry_1, entry_1))
    topology.standalone.add_s(entry_1)

    topology.standalone.log.info("\n\n######################### Restart Server ######################\n")
    topology.standalone.stop(timeout=10)
    topology.standalone.start(timeout=10)

    topology.standalone.log.info("\n\n######################### ADD USER 2 ######################\n")

    # Prepare entry 2 having the same sn, which crashes the server
    entry_name = '%s 2' % (ENTRY_NAME)
    entry_dn_2 = 'cn=%s, %s' % (entry_name, SUFFIX)
    entry_2 = Entry(entry_dn_2)
    entry_2.setValues('objectclass', 'top', 'person')
    entry_2.setValues('sn', ENTRY_NAME)
    entry_2.setValues('cn', entry_name)
    topology.standalone.log.info("Try to add Add %s: %r" % (entry_2, entry_2))
    try:
        topology.standalone.add_s(entry_2)
    except:
        topology.standalone.log.warn("Adding %s failed" % entry_dn_2)
        pass

    topology.standalone.log.info("\n\n######################### IS SERVER UP? ######################\n")
    ents = topology.standalone.search_s(entry_dn_1, ldap.SCOPE_BASE, '(objectclass=*)')
    assert len(ents) == 1
    topology.standalone.log.info("Yes, it's up.")

    topology.standalone.log.info("\n\n######################### CHECK USER 2 NOT ADDED ######################\n")
    topology.standalone.log.info("Try to search %s" % entry_dn_2)
    try:
        ents = topology.standalone.search_s(entry_dn_2, ldap.SCOPE_BASE, '(objectclass=*)')
    except ldap.NO_SUCH_OBJECT:
        topology.standalone.log.info("Found none")

    topology.standalone.log.info("\n\n######################### DELETE USER 1 ######################\n")

    topology.standalone.log.info("Try to delete  %s " % entry_dn_1)
    topology.standalone.delete_s(entry_dn_1)


def test_ticket47808_final(topology):
    topology.standalone.delete()
    log.info('Testcase PASSED')


def run_isolated():
    '''
        run_isolated is used to run these test cases independently of a test scheduler (xunit, py.test..)
        To run isolated without py.test, you need to
            - edit this file and comment '@pytest.fixture' line before 'topology' function.
            - set the installation prefix
            - run this program
    '''
    global installation_prefix
    installation_prefix = None

    topo = topology(True)
    test_ticket47808_run(topo)

    test_ticket47808_final(topo)


if __name__ == '__main__':
    run_isolated()