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

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

    table_name = 'interface_tags'
    fields = {
        'interface_tag_id': Parameter(int, "Interface setting identifier", primary_key=True),
        'interface_id': Interface.fields['interface_id'],
        'ip': Interface.fields['ip'],
        'tag_type_id': TagType.fields['tag_type_id'],
        'tagname': TagType.fields['tagname'],
        'description': TagType.fields['description'],
        'category': TagType.fields['category'],
        'value': Parameter(str, "Interface setting value"),
        ### relations

        }

    def sync(self, commit = True, validate=True):
        AlchemyObj.sync(self, commit, validate)
        if 'interface_tag_id' not in self:
            # Before a new slice is added, delete expired slices
            #expired = Slices(self.api, expires = -int(time.time()))
            #for slice in expired:
            #    slice.delete(commit)
            AlchemyObj.insert(self, dict(self))
        else:
            AlchemyObj.update(self, {'interface_tag_id': self['interface_tag_id']}, dict(self))

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


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

    def __init__(self, api, interface_tag_filter = None, columns = None):
        if not interface_tag_filter:
            interface_tags = InterfaceTag().select()
        if isinstance(interface_tag_filter, (list, tuple, set, int, long)):
            interface_tags = InterfaceTag().select(filter={'interface_tag_id': interface_tag_filter})
        elif isinstance(interface_tag_filter, dict):
            interface_tags = InterfaceTag().select(filter=interface_tag_filter})
        else:
            raise PLCInvalidArgument, "Wrong interface setting filter %r"%interface_tag_filter

        for interface_tag in interface_tags:
            self.append(interface_tag)