#
# Gramps - a GTK+/GNOME based genealogy program
#
# Copyright (C) 2000-2006  Donald N. Allingham
# Copyright (C) 2011       Tim G L Lyons, Nick Hall
#
# 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
#
# $Id$

"""
CitationTreeModel classes for GRAMPS.
"""

#-------------------------------------------------------------------------
#
# python modules
#
#-------------------------------------------------------------------------
import logging
log = logging.getLogger(".")
LOG = logging.getLogger(".citation")

#-------------------------------------------------------------------------
#
# internationalization
#
#-------------------------------------------------------------------------
from gramps.gen.const import GRAMPS_LOCALE as glocale
_ = glocale.translation.gettext

#-------------------------------------------------------------------------
#
# GNOME/GTK modules
#
#-------------------------------------------------------------------------
from gi.repository import Gtk

#-------------------------------------------------------------------------
#
# GRAMPS modules
#
#-------------------------------------------------------------------------
from gramps.gen.utils.db import get_source_referents
from .treebasemodel import TreeBaseModel
from .citationbasemodel import CitationBaseModel

#-------------------------------------------------------------------------
#
# CitationModel
#
#-------------------------------------------------------------------------
class CitationTreeModel(CitationBaseModel, TreeBaseModel):
    """
    Hierarchical citation model.
    """
    def __init__(self, db, scol=0, order=Gtk.SortType.ASCENDING, search=None,
                 skip=set(), sort_map=None):
        self.db = db
        self.number_items = self.db.get_number_of_sources
        self.map = self.db.get_raw_source_data
        self.gen_cursor = self.db.get_source_cursor
        # The items here must correspond, in order, with data in 
        # CitationTreeView, and with the items in the secondary fmap, fmap2
        self.fmap = [
            self.source_src_title,   # COL_TITLE_PAGE (both Source & Citation)
            self.source_src_id,      # COL_ID         (both Source & Citation)
            None,                    # COL_DATE       (not for Source)
            None,                    # COL_CONFIDENCE (not for Source)
            self.source_src_private, # COL_PRIV       (both Source & Citation)
            self.source_src_chan,    # COL_CHAN       (both Source & Citation)
            self.source_src_auth,    # COL_SRC_AUTH   (Source only)
            self.source_src_abbr,    # COL_SRC_ABBR   (Source only)
            self.source_src_pinfo,   # COL_SRC_PINFO  (Source only)
            ]
        self.smap = [
            self.source_src_title,
            self.source_src_id,
            self.dummy_sort_key,
            self.dummy_sort_key,
            self.source_src_private,
            self.source_sort2_change,
            self.source_src_auth,
            self.source_src_abbr,
            self.source_src_pinfo,
            ]
        
        TreeBaseModel.__init__(self, self.db, scol=scol, order=order,
                               search=search, skip=skip, sort_map=sort_map,
                               nrgroups=1,
                               group_can_have_handle=True,
                               has_secondary=True)

    def destroy(self):
        """
        Unset all elements that can prevent garbage collection
        """
        self.db = None
        self.gen_cursor = None
        self.map = None
        self.fmap = None
        self.smap = None
        self.number_items = None
        self.gen_cursor2 = None
        self.map2 = None
        self.fmap2 = None
        self.smap2 = None
        self.number_items2 = None
        TreeBaseModel.destroy(self)

    def _set_base_data(self):
        """See TreeBaseModel, for citations, most have been set in init of
        CitationBaseModel
        """
        self.number_items2 = self.db.get_number_of_citations
        self.map2 = self.db.get_raw_citation_data
        self.gen_cursor2 = self.db.get_citation_cursor
        self.fmap2 = [
            self.citation_page,
            self.citation_id,
            self.citation_date,
            self.citation_confidence,
            self.citation_private,
            self.citation_change,
            None,
            None,
            None,
            ]
        self.smap2 = [
            self.citation_page,
            self.citation_id,
            self.citation_sort_date,
            self.citation_confidence,
            self.citation_private,
            self.citation_sort_change,
            self.dummy_sort_key,
            self.dummy_sort_key,
            self.dummy_sort_key,
            ]

    def get_tree_levels(self):
        """
        Return the headings of the levels in the hierarchy.
        """
        return [_('Source'), _('Citation')]

    def add_row(self, handle, data):
        """
        Add source nodes to the node map.

        handle      The handle of the gramps object.
        data        The object data.
        """
        sort_key = self.sort_func(data)
        self.add_node(None, handle, sort_key, handle)

    def add_row2(self, handle, data):
        """
        Add citation nodes to the node map.

        handle      The handle of the gramps object.
        data        The object data.
        """
        sort_key = self.sort_func2(data)
        # If the source for this citation already exists (in the tree model) we
        # add the citation as a child of the source. Otherwise we add the source
        # first (because citations don't have any meaning without the associated
        # source)
        if self._get_node(data[5]):
            #             parent   child   sortkey   handle
            self.add_node(data[5], handle, sort_key, handle, secondary=True)
        else:
            # add the source node first
            source_sort_key = self.sort_func(self.map(data[5]))
            #            parent child    sortkey          handle
            self.add_node(None, data[5], source_sort_key, data[5])
            
            #            parent    child   sortkey   handle
            self.add_node(data[5], handle, sort_key, handle, secondary=True)

    def on_get_n_columns(self):
        return len(self.fmap)+1

    def column_header(self, node):
        """
        Return a column heading.  This is called for nodes with no associated      
        Gramps handle.
        """
        return node.name
