#
# Gramps - a GTK+/GNOME based genealogy program
#
# Copyright (C) 2002-2006  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, see <https://www.gnu.org/licenses/>.
#
# gen.filters.rules/Person/_IsDuplicatedAncestorOf.py

# -------------------------------------------------------------------------
#
# Standard Python modules
#
# -------------------------------------------------------------------------
from ....const import GRAMPS_LOCALE as glocale

_ = glocale.translation.gettext

# -------------------------------------------------------------------------
#
# Gramps modules
#
# -------------------------------------------------------------------------
from .. import Rule

# -------------------------------------------------------------------------
#
# Typing modules
#
# -------------------------------------------------------------------------
from typing import Set
from ....lib import Person
from ....db import Database


# -------------------------------------------------------------------------
#
# IsDuplicatedAncestorOf
#
# -------------------------------------------------------------------------
class IsDuplicatedAncestorOf(Rule):
    """Rule that checks for a person that is a duplicated ancestor of
    a specified person"""

    labels = [_("ID:")]
    name = _("Duplicated ancestors of <person>")
    category = _("Ancestral filters")
    description = _(
        "Matches people that are ancestors twice or more " "of a specified person"
    )

    def prepare(self, db: Database, user):
        self.db = db
        self.cache: Set[str] = set()
        self.selected_handles: Set[str] = set()
        root_person = db.get_person_from_gramps_id(self.list[0])
        if root_person:
            self.init_ancestor_list(db, root_person)

    def reset(self):
        self.cache.clear()
        self.selected_handles.clear()

    def apply_to_one(self, db: Database, person: Person) -> bool:
        return person.handle in self.selected_handles

    def init_ancestor_list(self, db: Database, person: Person):
        fam_id = (
            person.parent_family_list[0] if len(person.parent_family_list) > 0 else None
        )
        if fam_id:
            fam = db.get_family_from_handle(fam_id)
            if fam:
                f_id = fam.father_handle
                m_id = fam.mother_handle
                if m_id:
                    self.go_deeper(db, db.get_person_from_handle(m_id))
                if f_id:
                    self.go_deeper(db, db.get_person_from_handle(f_id))

    def go_deeper(self, db: Database, person: Person):
        if person and person.handle in self.cache:
            self.selected_handles.add((person.handle))
            # the following keeps from scanning same parts of tree multiple
            # times and avoids crash on tree loops.
            return
        self.cache.add(person.handle)
        self.init_ancestor_list(db, person)
