import os, ConfigParser

class Config(dict):

    DIRNAME = os.path.expanduser('~/.config/Soulution')
    FILENAME = os.path.join(DIRNAME, 'Soulution.cfg')
    USERDATA = 'Soulution'
    TIMEOUT = 4

    _instance = None
    _initdone = False
    _special_types = \
    {
        'user': lambda u: os.getenv('USER') if not u else u,
        'remember_me': lambda o: True if o == 'True' else False,
        'auto_connect': lambda o: True if o == 'True' else False,
        'port': int,
        'contactlist': lambda l: l.split(':')
    }
    _default_values = \
    {
        'user': os.getenv('USER'),
        'passwd': '',
        'host': 'ns-server.epitech.net',
        'port': 4242,
        'location': 'Dans la soulution',
        'remember_me': True,
        'auto_connect': False,
        'contactlist': []
    }

    def __new__(cls):
        if cls._instance is None:
            cls._instance = dict.__new__(cls)
        return cls._instance

    def __init__(self):
        if self._initdone:
            return
        self._parser = ConfigParser.RawConfigParser()
        self.load()
        self._initdone = True

    def load(self):
        self._parser.read(Config.FILENAME)
        st = Config._special_types
        for (key, value) in self._parser.defaults().iteritems():
            self[key] = value if key not in st else st[key](value)
        must_save = False
        for (key, value) in Config._default_values.iteritems():
            if key not in self.keys():
                self[key] = value
                must_save = True
        if must_save:
            self.save()

    def save(self):
        try:
            if not os.path.exists(Config.DIRNAME):
                os.makedirs(Config.DIRNAME, 0700)
        except:
            raise Exception('Unable to create configuration directory %s' % Config.DIRNAME)
        for (key, value) in self.iteritems():
            value = str(value) if key != 'contactlist' else ':'.join(value)
            self._parser.set('DEFAULT', key, value)
        try:
            f = open(Config.FILENAME, 'w')
            self._parser.write(f)
            f.close()
        except:
            raise Exception('Unable to write file %s' % Config.FILENAME)