"""
Created on 2014.01.06

@author: Giovanni Cannata

Copyright 2014 Giovanni Cannata

This file is part of python3-ldap.

python3-ldap is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published
by the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

python3-ldap is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License
along with python3-ldap in the COPYING and COPYING.LESSER files.
If not, see <http://www.gnu.org/licenses/>.
"""
from os import linesep

from ..core.exceptions import LDAPAttributeError


# noinspection PyUnresolvedReferences
class Attribute(object):
    """
    Attribute/values object, it includes the search result (after post_query transformation) of each attribute in an entry
    Attribute object is read only
    'values' contains the processed attribute values
    'raw_values' contains the unprocessed attribute values
    """

    def __init__(self, attr_def, entry):
        self.__dict__['key'] = attr_def.key
        self.__dict__['definition'] = attr_def
        self.__dict__['values'] = []
        self.__dict__['raw_values'] = []
        self.__dict__['entry'] = entry

    def __repr__(self):
        if len(self.values) == 1:
            r = self.key + ': ' + str(self.values[0])
        elif len(self.values) > 1:
            r = self.key + ': ' + str(self.values[0])
            filler = ' ' * (len(self.key) + 6)
            for value in sorted(self.values[1:]):
                r += linesep + filler + str(value)
        else:
            r = ''

        return r

    def __str__(self):
        if len(self.values) == 1:
            return self.values[0]
        else:
            return str(self.values)

    def __len__(self):
        return len(self.values)

    def __iter__(self):
        return self.values.__iter__()

    def __getitem__(self, item):
        return self.values[item]

    def __setattr__(self, item, value):
        raise LDAPAttributeError('attribute is read only')

    @property
    def value(self):
        return self.__dict__['values'][0] if len(self.__dict__['values']) == 1 else self.__dict__['values']