#
# Thierry Parmentelat - INRIA
#
from PLC.Faults import *
from PLC.Parameter import Parameter
from PLC.Interfaces import Interface, Interfaces
from PLC.TagTypes import TagType, TagTypes
from PLC.Storage.AlchemyObject import AlchemyObj

class Ilink(AlchemyObj):
    """
    Representation of a row in the ilink table.
    To use, instantiate with a dict of values.
    """

    tablename = 'ilink'
    fields = {
        'ilink_id': Parameter(int, "ilink identifier", primary_key=True),
        'tag_type_id': TagType.fields['tag_type_id'],
        'src_interface_id': Parameter(int, "source interface identifier"),
        'dst_interface_id': Parameter(int, "destination interface identifier"),
        'value': Parameter( str, "optional ilink value"),
        }

    def sync(self, insert=False, validate=True):
        AlchemyObj.sync(self, commit, validate)
        if 'ilink_id' in self:
            AlchemyObj.insert(self, dict(self))
        else:
            AlchemyObj.update(self, {'ilink_id': self['ilink_id']}, dict(self))

    def delete(self, commit=True):
        assert 'ilink_id' in self
        AlchemyObj.delete(self, dict(self))

class Ilinks(list):
    """
    Representation of row(s) from the ilink table in the
    database.
    """

    def __init__(self, api, ilink_filter = None, columns = None):
        if not ilink_filter:
            ilinks = Ilink().select()
        elif isinstance(ilink_filter, (list, tuple, set, int, long)):
            ilinks = Ilink().select(filter={'ilink_id': ilink_filter})
        elif isinstance(ilink_filter, dict):
            ilink_filter = Ilink().select(filter=ilink_filter)
        else:
            raise PLCInvalidArgument, "Wrong ilink filter %r"%ilink_filter

        for ilink in ilinks:
            self.append(ilink)