#
#
#


class BaseSource(object):
    SUPPORTS_MULTIVALUE_PTR = False
    SUPPORTS_POOL_VALUE_STATUS = False
    SUPPORTS_ROOT_NS = False
    SUPPORTS_DYNAMIC_SUBNETS = False

    def __init__(self, id):
        self.id = id
        if not getattr(self, 'log', False):
            raise NotImplementedError(
                'Abstract base class, log property missing'
            )
        if not hasattr(self, 'SUPPORTS_GEO'):
            raise NotImplementedError(
                'Abstract base class, SUPPORTS_GEO property missing'
            )
        if not hasattr(self, 'SUPPORTS'):
            raise NotImplementedError(
                'Abstract base class, SUPPORTS property missing'
            )

    @property
    def SUPPORTS_DYNAMIC(self):
        return False

    def populate(self, zone, target=False, lenient=False):
        '''
        Loads all records the provider knows about for the provided zone

        When `target` is True the populate call is being made to load the
        current state of the provider.

        When `lenient` is True the populate call may skip record validation and
        do a "best effort" load of data. That will allow through some common,
        but not best practices stuff that we otherwise would reject. E.g. no
        trailing . or missing escapes for ;.

        When target is True (loading current state) this method should return
        True if the zone exists or False if it does not.
        '''
        raise NotImplementedError(
            'Abstract base class, populate method missing'
        )

    def supports(self, record):
        return record._type in self.SUPPORTS

    def __repr__(self):
        return self.__class__.__name__