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############################################################################
# Copyright (C) Internet Systems Consortium, Inc. ("ISC")
#
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
#
# See the COPYRIGHT file distributed with this work for additional
# information regarding copyright ownership.
############################################################################

from collections import defaultdict
from . import dnskey
import os
import glob

########################################################################
# Class keydict
########################################################################
class keydict:
    """ A dictionary of keys, indexed by name, algorithm, and key id """

_keydict = defaultdict(lambda: defaultdict(dict))
    _defttl = None
    _missing = []

def __init__(self, dp=None, **kwargs):
        self._defttl = kwargs.get('keyttl', None)
        zones = kwargs.get('zones', None)

if not zones:
            path = kwargs.get('path',None) or '.'
            self.readall(path)
        else:
            for zone in zones:
                if 'path' in kwargs and kwargs['path'] is not None:
                    path = kwargs['path']
                else:
                    path = dp and dp.policy(zone).directory or '.'
                if not self.readone(path, zone):
                    self._missing.append(zone)

def readall(self, path):
        files = glob.glob(os.path.join(path, '*.private'))

for infile in files:
            key = dnskey(infile, path, self._defttl)
            self._keydict[key.name][key.alg][key.keyid] = key

def readone(self, path, zone):
        match='K' + zone + '.+*.private'
        files = glob.glob(os.path.join(path, match))

found = False
        for infile in files:
            key = dnskey(infile, path, self._defttl)
            if key.name != zone: # shouldn't ever happen
                continue
            self._keydict[key.name][key.alg][key.keyid] = key
            found = True

return found

def __iter__(self):
        for zone, algorithms in self._keydict.items():
            for alg, keys in algorithms.items():
                for key in keys.values():
                    yield key

def __getitem__(self, name):
        return self._keydict[name]

def zones(self):
        return (self._keydict.keys())

def algorithms(self, zone):
        return (self._keydict[zone].keys())

def keys(self, zone, alg):
        return (self._keydict[zone][alg].keys())

def missing(self):
        return (self._missing)

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