import ldap
from geruecht import MONEY, USER, GASTRO, BAR, Singleton

class LDAPController(metaclass=Singleton):
    '''
    Authentification over LDAP. Create Account on-the-fly
    '''

    def __init__(self, url="ldap://192.168.5.108", dn='dc=ldap,dc=example,dc=local'):
        self.url = url
        self.dn = dn
        self.connect()

    def connect(self):
        try:
            self.client = ldap.initialize(self.url, bytes_mode=False)
        except Exception as err:
            raise err

    def login(self, username, password):
        self.connect()
        try:
            self.client.bind_s("cn={},ou=user,{}".format(username, self.dn), password)
            self.client.unbind_s()
        except:
            self.client.unbind_s()
            raise Exception("Invalid Password or Username")

    def getUserData(self, username):
        self.connect()
        search_data = self.client.search_s('ou=user,{}'.format(self.dn), ldap.SCOPE_SUBTREE, 'cn={}'.format(username), ['cn', 'givenName', 'sn'])
        retVal = search_data[0][1]
        for k,v in retVal.items():
            retVal[k] = v[0].decode('utf-8')
        retVal['dn'] = self.dn
        return retVal


    def getGroup(self, username):
        retVal = []
        self.connect()
        main_group_data = self.client.search_s('ou=user,{}'.format(self.dn), ldap.SCOPE_SUBTREE, 'cn={}'.format(username), ['gidNumber'])
        if main_group_data:
            main_group_number = main_group_data[0][1]['gidNumber'][0].decode('utf-8')
            group_data = self.client.search_s('ou=group,{}'.format(self.dn), ldap.SCOPE_SUBTREE, 'gidNumber={}'.format(main_group_number), ['cn'])
            if group_data:
                group_name = group_data[0][1]['cn'][0].decode('utf-8')
                if group_name == 'ldap-user':
                    retVal.append(USER)

        groups_data = self.client.search_s('ou=group,{}'.format(self.dn), ldap.SCOPE_SUBTREE, 'memberUID={}'.format(username), ['cn'])
        for data in groups_data:
            print(data[1]['cn'][0].decode('utf-8'))
            group_name = data[1]['cn'][0].decode('utf-8')
            if group_name == 'finanzer':
                retVal.append(MONEY)
            elif group_name == 'gastro':
                retVal.append(GASTRO)
            elif group_name == 'bar':
                retVal.append(BAR)
        return retVal


if __name__ == '__main__':
    a = LDAPController()
    a.getUserData('jhille')