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

    def __isUserInList(self, list, username):
        help_list = []
        for user in list:
            help_list.append(user[1]['cn'][0].decode('utf-8'))
        if username in help_list:
            return True
        return False

    def searchUser(self, searchString):
        self.connect()

        name = searchString.split(" ")
        name_result = []

        if len(name) == 1:
            name_result[0] = self.client.search_s('ou=user,{}'.format(self.dn), ldap.SCOPE_SUBTREE, 'givenName={}'.format(name[0]), ['cn', 'givenName', 'sn'])
            name_result[1] = self.client.search_s('ou=user,{}'.format(self.dn), ldap.SCOPE_SUBTREE, 'sn={}'.format(name[0]),['cn', 'givenName', 'sn'])
        else:
            name_result[2] = self.client.search_s('ou=user,{}'.format(self.dn), ldap.SCOPE_SUBTREE,
                                              'givenName={}'.format(name[0]), ['cn', 'givenName', 'sn'])
            name_result[3] = self.client.search_s('ou=user,{}'.format(self.dn), ldap.SCOPE_SUBTREE, 'sn={}'.format(name[0]),
                                             ['cn', 'givenName', 'sn'])
        retVal = []

        for user in name_result:
            username = user[1]['cn'][0].decode('utf-8')
            if not self.__isUserInList(retVal, username):
                firstname = user[1]['givenName'][0].decode('utf-8')
                lastname = user[1]['givenName'][0].decode('utf-8')
                retVal.append({username: username, firstname: firstname, lastname: lastname})

        return retVal


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