#
# Thierry Parmentelat - INRIA
#
from types import StringTypes

from PLC.Faults import *
from PLC.Parameter import Parameter
from PLC.Filter import Filter
from PLC.Storage.AlchemyObject import AlchemyObj
from PLC.Roles import Role, Roles

# xxx todo : deleting a tag type should delete the related nodegroup(s)

class TagType (AlchemyObj):

    """
    Representation of a row in the tag_types table.
    """

    tablename = 'tag_types'
    join_tables = ['tag_type_role', 'node_tag', 'interface_tag', 'slice_tag', 'site_tag', 'person_tag' ]
    fields = {
        'tag_type_id': Parameter(int, "Node tag type identifier", primary_key=True),
        'tagname': Parameter(str, "Node tag type name", max = 100),
        'description': Parameter(str, "Node tag type description", max = 254),
        'category' : Parameter (str, "Node tag category", max=64, optional=True),
        'role_ids': Parameter([int], "List of role identifiers", joined=True),
        'roles': Parameter([str], "List of roles", joined=True),
        }

    def validate_tagname(self, name):
        if not len(name):
            raise PLCInvalidArgument, "tag type name must be set"

        conflicts = TagTypes(self.api, [name])
        for tag_type in conflicts:
            if 'tag_type_id' not in self or \
                   self['tag_type_id'] != tag_type['tag_type_id']:
                raise PLCInvalidArgument, "tag type name already in use"

        return name

    #add_role = Row.add_object(Role, 'tag_type_role')
    #remove_role = Row.remove_object(Role, 'tag_type_role')

    def sync(self, insert=False, validate=True):
        AlchemyObj.sync(self, insert, validate)
        if insert == True or 'tag_type_id' not in self:
            AlchemyObj.insert(self, dict(self))
            tag_type = AlchemyObj.select(self, filter={'tagname': self['tagname']})
            self['tag_type_id'] = tag_type.tag_type_id
        else:
            AlchemyObj.update(self, dict(self))

    def delete(self, commit=True):
        AlchemyObj.delete(self, filter={'tag_type_id': self['tag_type_id']})
class TagTypes(list):
    """
    Representation of row(s) from the tag_types table
    in the database.
    """

    def __init__(self, api, tag_type_filter = None, columns = None):

        if not tag_type_filter:
            tag_types = TagType().select()
        elif isinstance(tag_type_filter, (list, tuple, set)):
            ints = filter(lambda x: isinstance(x, (int, long)), tag_type_filter)
            strs = filter(lambda x: isinstance(x, StringTypes), tag_type_filter)
            tag_types = TagType().select(filter={'tag_type_id': ints, 'tagname': strs})
        elif isinstance(tag_type_filter, dict):
            tag_types = TagType().select(filter=tag_type_filter)
        elif isinstance(tag_type_filter, (int, long)):
            tag_types = TagType().select(filter={'tag_type_id': tag_type_filter})
        elif isinstance(tag_type_filter, StringTypes):
            tag_types = TagType().select(filter={'tagname': tag_type_filter})
        else:
            raise PLCInvalidArgument, "Wrong tag type filter %r"%tag_type_filter

        for tag_type in tag_types:
            self.append(TagType(api, object=tag_type, columns=columns))