#
# Gramps - a GTK+/GNOME based genealogy program
#
# Copyright (C) 2002  Donald N. Allingham
#
# 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
#

from ZODB import Persistent
from ZODB.PersistentList import PersistentList
from ZODB.dbmStorage import gdbmStorage
from ZODB.DB import DB
from BTrees.OOBTree import OOBTree
from UserDict import UserDict
from RelLib import GrampsDB, Person
import const

class PersistentReference(Persistent):

    def __init__(self, ob):
        self.ob = ob

    def getOb(self):
        return self.ob

class PersonWrapper:

    _real = None

    def __init__(self, real, map):
        self._real = real
        self._map_ref = PersistentReference(map)
        self.id = real.getId()
        self.PrimaryName = real.getPrimaryName()
        self.gender = real.getGender()
        self.birth = real.getBirth()
        self.death = real.getDeath()

    def _notifyChange(self):
        # Trigger a change to the PersonMap.
        self._map_ref.getOb()[self.id] = self

    def getId(self):
        return self.id

    def setId(self, id):
        self._real.setId(id)
        self.id = self._real.getId()
        self._notifyChange()

    def getPrimaryName(self):
        return self.PrimaryName

    def setPrimaryName(self, name):
        self._real.setPrimaryName(name)
        self.PrimaryName = self._real.getPrimaryName()
        self._notifyChange()

    def getGender(self):
        return self.gender

    def setGender(self, gender):
        self._real.setGender(gender)
        self.gender = self._real.getGender()
        self._notifyChange()

    def getBirth(self):
        return self.birth

    def setBirth(self, birth):
        self._real.setBirth(birth)
        self.birth = self._real.getBirth()
        self._notifyChange()

    def getDeath(self):
        return self.death

    def setDeath(self, death):
        self._real.setDeath(death)
        self.death = self._real.getDeath()
        self._notifyChange()


for key, value in Person.__dict__.items():
    if not key.startswith('_'):
        code = ("def %s(self, *args, **kw): "
                "return apply(self._real.%s, args, kw)") % (key, key)
        d = {}
        exec code in d
        PersonWrapper.__dict__[key] = d[key]


class PersonMap(Persistent, UserDict):

    def __init__(self):
        self.data = OOBTree()

    def __setitem__(self, key, value):
        if not isinstance(value, PersonWrapper):
            # Create the PersonWrapper.
            assert isinstance(value, Person)
            value = PersonWrapper(value, self)
        self.data[key] = value

    def update(self):
        # This probably shouldn't be called anyway.
        raise NotImplementedError

    def copy(self):
        # This probably shouldn't be called anyway.
        raise NotImplementedError
    
class GrampsZODB(GrampsDB):

    def __init__(self):
        self.conn = None
        GrampsDB.__init__(self)

    def get_type(self):
        return 'GrampsZODB'

    def close(self):
        self.db.close()

    def get_base(self):
        return const.zodbFile

    def need_autosave(self):
        return 0
        
    def new(self):
        GrampsDB.new(self)
        self.familyMap = OOBTree()
        self.personMap = PersonMap()
        self.sourceMap = OOBTree()
        self.placeMap = OOBTree()
        self.personTable = OOBTree()
        self.placeTable = OOBTree()
        self.sourceTable = OOBTree()
        self.need_commit = 0
        
        if self.conn:
            self.db.close()
            self.conn.close()
            self.conn = None

    def save(self,name,callback):
        get_transaction().commit()
        if self.conn == None:
            self.load(name,callback)

    def get_object(self,tag):
        if self.root.has_key(tag):
            item = self.root[tag]
        else:
            item = OOBTree()
            self.root[tag] = item
            self.need_commit = 1
        return item

    def get_display_table(self,src,tag):
        if self.root.has_key(tag):
            table = self.root[tag]
        else:
            table = OOBTree()
            for key in src.keys():
                obj = src[key]
                table[key] = obj.getDisplayInfo()
            self.root[tag] = table
            self.need_commit = 1
        return table

    def load(self,name,callback):
        self.db = DB(gdbmStorage(name,'w'))
        self.conn = self.db.open()
        self.root = self.conn.root()
        self.need_commit = 0

        self.familyMap = self.get_object('familyMap')

        if self.root.has_key('personMap'):
            self.personMap = self.root['personMap']
        else:
            self.personMap = PersonMap()
            self.root['personMap'] = self.personMap
            self.need_commit = 1

        self.personTable = self.get_display_table(self.personMap,'personTable')

        if self.root.has_key('surnames'):
            self.surnames = self.root['surnames']
        else:
            self.surnames = PersistentList()
            for key in self.personMap.keys():
                person = self.personMap[key]
                self.addSurname(person.getPrimaryName().getSurname())
            self.root['surnames'] = self.surnames
            self.need_commit = 1

        self.sourceMap = self.get_object('sourceMap')
        self.sourceTable = self.get_display_table(self.sourceMap,'sourceTable')

        self.placeMap = self.get_object('placeMap')
        self.placeTable = self.get_display_table(self.placeMap,'placeTable')
        
        if self.root.has_key('default'):
            self.default = self.root['default']
        else:
            self.default = None
            self.root['default'] = self.default
            self.need_commit = 1

        if self.root.has_key('bookmarks'):
            self.bookmarks = self.root['bookmarks']
        else:
            self.bookmarks = []
            self.root['bookmarks'] = self.bookmarks
            self.need_commit = 1
        if self.need_commit:
            get_transaction().commit()
        return 1

    def setDefaultPerson(self,person):
        """sets the default Person to the passed instance"""
        GrampsDB.setDefaultPerson(self,person)
        self.root['default'] = person