# Copyright (C) 2009 David Sauve
#
# 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.

import datetime
import os

from django.conf import settings
from django.test import TestCase

from haystack.backends.xapian_backend import SearchBackend, SearchQuery

from xapian_haystack.tests.models import MockModel, AnotherMockModel


class XapianSearchQueryTestCase(TestCase):
    def setUp(self):
        super(XapianSearchQueryTestCase, self).setUp()

        # Stow.
        temp_path = os.path.join('tmp', 'test_xapian_query')
        self.old_xapian_path = getattr(settings, 'HAYSTACK_XAPIAN_PATH', temp_path)
        settings.HAYSTACK_XAPIAN_PATH = temp_path

        self.sq = SearchQuery(backend=SearchBackend())

    def tearDown(self):
        if os.path.exists(settings.HAYSTACK_XAPIAN_PATH):
            index_files = os.listdir(settings.HAYSTACK_XAPIAN_PATH)

            for index_file in index_files:
                os.remove(os.path.join(settings.HAYSTACK_XAPIAN_PATH, index_file))

            os.removedirs(settings.HAYSTACK_XAPIAN_PATH)

        settings.HAYSTACK_XAPIAN_PATH = self.old_xapian_path
        super(XapianSearchQueryTestCase, self).tearDown()

    def test_build_query_all(self):
        self.assertEqual(self.sq.build_query(), '*')

    def test_build_query_single_word(self):
        self.sq.add_filter('content', 'hello')
        self.assertEqual(self.sq.build_query(), 'hello')

    def test_build_query_multiple_words_and(self):
        self.sq.add_filter('content', 'hello')
        self.sq.add_filter('content', 'world')
        self.assertEqual(self.sq.build_query(), 'hello AND world')

    def test_build_query_multiple_words_not(self):
        self.sq.add_filter('content', 'hello', use_not=True)
        self.sq.add_filter('content', 'world', use_not=True)
        self.assertEqual(self.sq.build_query(), 'NOT hello NOT world')

    def test_build_query_multiple_words_or(self):
        self.sq.add_filter('content', 'hello', use_or=True)
        self.sq.add_filter('content', 'world', use_or=True)
        self.assertEqual(self.sq.build_query(), 'hello OR world')

    def test_build_query_multiple_words_mixed(self):
        self.sq.add_filter('content', 'why')
        self.sq.add_filter('content', 'hello', use_or=True)
        self.sq.add_filter('content', 'world', use_not=True)
        self.assertEqual(self.sq.build_query(), 'why OR hello NOT world')

    def test_build_query_phrase(self):
        self.sq.add_filter('content', 'hello world')
        self.assertEqual(self.sq.build_query(), '"hello world"')

    def test_build_query_multiple_filter_types(self):
        self.sq.add_filter('content', 'why')
        self.sq.add_filter('pub_date__lte', datetime.datetime(2009, 2, 10, 1, 59))
        self.sq.add_filter('author__gt', 'david')
        self.sq.add_filter('created__lt', datetime.datetime(2009, 2, 12, 12, 13))
        self.sq.add_filter('title__gte', 'B')
        self.sq.add_filter('id__in', [1, 2, 3])
        self.assertEqual(self.sq.build_query(), 'why AND pub_date:..20090210015900 AND NOT author:..david AND NOT created:20090212121300..* AND title:B..* AND (id:1 OR id:2 OR id:3)')

    def test_build_query_wildcard_filter_types(self):
        self.sq.add_filter('content', 'why')
        self.sq.add_filter('title__startswith', 'haystack')
        self.assertEqual(self.sq.build_query(), 'why AND title:haystack*')

    def test_clean(self):
        self.assertEqual(self.sq.clean('hello world'), 'hello world')
        self.assertEqual(self.sq.clean('hello AND world'), 'hello and world')
        self.assertEqual(self.sq.clean('hello AND OR NOT + - && || ! ( ) { } [ ] ^ " ~ * ? : \ world'), 'hello and or not \\+ \\- \\&& \\|| \\! \\( \\) \\{ \\} \\[ \\] \\^ \\" \\~ \\* \\? \\: \\\\ world')
        self.assertEqual(self.sq.clean('so please NOTe i am in a bAND and bORed'), 'so please NOTe i am in a bAND and bORed')

    def test_build_query_with_models(self):
        self.sq.add_filter('content', 'hello')
        self.sq.add_model(MockModel)
        self.assertEqual(self.sq.build_query(), '(hello) django_ct:tests.mockmodel')

        self.sq.add_model(AnotherMockModel)
        self.assertEqual(self.sq.build_query(), '(hello) django_ct:tests.anothermockmodel django_ct:tests.mockmodel')

    def test_build_query_with_datetime(self):
        self.sq.add_filter('pub_date', datetime.datetime(2009, 5, 9, 16, 20))
        self.assertEqual(self.sq.build_query(), u'pub_date:20090509162000')

    def test_build_query_with_sequence_and_filter_not_in(self):
        self.sq.add_filter('id__exact', [1, 2, 3])
        self.assertEqual(self.sq.build_query(), u'id:[1, 2, 3]')