#
# Functions for interacting with the pcu_types table in the database
#
# Mark Huang <mlhuang@cs.princeton.edu>
# Copyright (C) 2006 The Trustees of Princeton University
#

from types import StringTypes

from PLC.Faults import *
from PLC.Parameter import Parameter
from PLC.Storage.AlchemyObject import AlchemyObj

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

    tablename = 'pcu_types'
    join_tables = ['pcu_protocol_type']
    fields = {
        'pcu_type_id': Parameter(int, "PCU Type Identifier", primary_key=True),
        'model': Parameter(str, "PCU model", max = 254),
        'name': Parameter(str, "PCU full name", max = 254),
        'pcu_protocol_type_ids': Parameter([int], "PCU Protocol Type Identifiers", joined=True),
        'pcu_protocol_types': Parameter([dict], "PCU Protocol Type List", joined=True)
        }

    def validate_model(self, model):
        # Make sure name is not blank
        if not len(model):
            raise PLCInvalidArgument, "Model must be specified"

        # Make sure boot state does not alredy exist
        conflicts = PCUTypes(self.api, model)
        for pcu_type in conflicts:
            if 'pcu_type_id' not in self or self['pcu_type_id'] != pcu_type['pcu_type_id']:
                raise PLCInvalidArgument, "Model already in use"

        return model

class PCUTypes(list):
    """
    Representation of the pcu_types table in the database.
    """

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

        # Remove pcu_protocol_types from query since its not really a field
        # in the db. We will add it later
        if not pcu_type_filter:
            pcu_types = PCUType().select()
        elif isinstance(pcu_type_filter, (list, tuple, set)):
            # Separate the list into integers and strings
            ints = filter(lambda x: isinstance(x, (int, long)), pcu_type_filter)
            strs = filter(lambda x: isinstance(x, StringTypes), pcu_type_filter)
            pcu_types = PCUType().select(filter = {'pcu_type_id': ints, 'model': strs})
        elif isinstance(pcu_type_filter, dict):
            pcu_types = PCUType().select(filter = pcu_type_filter)
        elif isinstance (pcu_type_filter, StringTypes):
            pcu_types = PCUType().select(filter = {'model': pcu_type_filter})
        elif isinstance (pcu_type_filter, int):
            pcu_types = PCUType().select(filter = {'pcu_type_id': pcu_filter})
        else:
            raise PLCInvalidArgument, "Wrong pcu_type filter %r"%pcu_type_filter

        
        self.extend(pcu_types)
        
         # return a list of protocol type objects for each port type
        if 'pcu_protocol_types' in removed_fields:
            from PLC.PCUProtocolTypes import PCUProtocolTypes
            protocol_type_ids = set()
            for pcu_type in self:
                protocol_type_ids.update(pcu_type['pcu_protocol_type_ids'])

            protocol_return_fields = ['pcu_protocol_type_id', 'port', 'protocol', 'supported']
            all_protocol_types = PCUProtocolTypes(self.api, list(protocol_type_ids), \
                                                  protocol_return_fields).dict('pcu_protocol_type_id')

            for pcu_type in self:
                pcu_type['pcu_protocol_types'] = []
                for protocol_type_id in pcu_type['pcu_protocol_type_ids']:
                    pcu_type['pcu_protocol_types'].append(all_protocol_types[protocol_type_id])