# -*- coding: UTF-8 -*-
#
# Copyright (C) 2007 by Jan Dittberner.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
# USA.
#
# Version: $Id: client.py 1101 2007-02-28 21:15:20Z jan $

from sqlalchemy import *
from tables import domain_table
from gnuviechadmin.exceptions import *

from record import Record
import datetime
from BackendEntity import *
from BackendEntityHandler import *
from settings import config

class Domain(BackendEntity):
    """Entity class for DNS domains."""

    _shortkeys = ("domainid", "sysuserid", "name", "type")
    _valid_domain_types = ("MASTER", "SLAVE")

    def __init__(self, verbose = False, **kwargs):
        BackendEntity.__init__(self, verbose)
        self.domainid = None
        self.sysuserid = None
        self.name = None
        self.type = None
        self.master = None
        self.ns1 = None
        self.ns2 = None
        self.mx = None
        self.ipaddr = None
        for (key, value) in kwargs.items():
            self.__setattr__(key, value)
        if not self.type:
            self.type = self.getdefaultdomaintype()
        if not self.ns1:
            self.ns1 = config.get('domain', 'defaultns1')
        if not self.ns2:
            self.ns2 = config.get('domain', 'defaultns2')
        if not self.mx:
            self.mx = config.get('domain', 'defaultmx')
        if not self.ipaddr:
            self.ipaddr = config.get('domain', 'defaultip')
        self.type = self.type.upper()
        self.validate()

    def getdefaultdomaintype(self):
        return self._valid_domain_types[0]

    def validate(self):
        BackendEntity.validate(self)
        if not self.type in self._valid_domain_types:
            raise ValidationFailedError(
                self, "invalid domain type %s" % (self.type))
        if self.type == 'SLAVE' and not self.master:
            raise ValidationFailedError(
                self, "you have to specify a master for slave domains.")
        if self.type == 'MASTER':
            if not self.ns1 or not self.ns2:
                raise ValidationFailedError(
                    self, "two nameservers must be specified.")
            if not self.mx:
                raise ValidationFailedError(
                    self, "a primary mx host must be specified.")

    def _getnewserial(self):
        current = datetime.datetime.now()
        return int("%04d%02d%02d01" % \
                   (current.year, current.month, current.day))

    def _getnewsoa(self):
        return '%s %s %d %d %d %d %d' % \
               (self.ns1,
                config.get('domain', 'defaulthostmaster'),
                self._getnewserial(),
                config.getint('domain', 'defaultrefresh'),
                config.getint('domain', 'defaultretry'),
                config.getint('domain', 'defaultexpire'),
                config.getint('domain', 'defaultminimumttl'))

    def create_hook(self):
        self.records.append(Record(
            name = self.name, type = 'SOA',
            content = self._getnewsoa(),
            ttl = config.getint('domain', 'defaultttl')))
        self.records.append(Record(
            name = self.name, type = 'NS', content = self.ns1,
            ttl = config.getint('domain', 'defaultttl')))
        self.records.append(Record(
            name = self.name, type = 'NS', content = self.ns2,
            ttl = config.getint('domain', 'defaultttl')))
        self.records.append(Record(
            name  = self.name, type = 'MX', content = self.mx,
            ttl = config.getint('domain', 'defaultttl'),
            prio = config.getint('domain', 'defaultmxprio')))
        self.records.append(Record(
            name = self.name, type = 'A', content = self.ipaddr,
            ttl = config.getint('domain', 'defaultttl')))
        self.records.append(Record(
            name = "www.%s" % (self.name), type = 'A', content = self.ipaddr,
            ttl = config.getint('domain', 'defaultttl')))

    def delete_hook(self):
        pass

domain_mapper = mapper(Domain, domain_table)
domain_mapper.add_property("records", relation(Record))

class DomainHandler(BackendEntityHandler):
    """BackendEntityHandler for Domain entities."""

    def __init__(self, verbose = False):
        BackendEntityHandler.__init__(self, Domain, verbose)