# ====================================================================
#   Licensed under the Apache License, Version 2.0 (the "License");
#   you may not use this file except in compliance with the License.
#   You may obtain a copy of the License at
#
#       http://www.apache.org/licenses/LICENSE-2.0
#
#   Unless required by applicable law or agreed to in writing, software
#   distributed under the License is distributed on an "AS IS" BASIS,
#   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#   See the License for the specific language governing permissions and
#   limitations under the License.
# ====================================================================

from unittest import TestCase, main
from lucene import *


class BooleanOrTestCase(TestCase):
    """
    Unit tests ported from Java Lucene
    """

    def __init__(self, *args):

        super(BooleanOrTestCase, self).__init__(*args)

        self.FIELD_T = "T"
        self.FIELD_C = "C"

        self.t1 = TermQuery(Term(self.FIELD_T, "files"))
        self.t2 = TermQuery(Term(self.FIELD_T, "deleting"))
        self.c1 = TermQuery(Term(self.FIELD_C, "production"))
        self.c2 = TermQuery(Term(self.FIELD_C, "optimize"))

        self.searcher = None

    def setUp(self):

        rd = RAMDirectory()
        writer = IndexWriter(rd, StandardAnalyzer(Version.LUCENE_CURRENT),
                             True, IndexWriter.MaxFieldLength.LIMITED)

        d = Document()
        d.add(Field(self.FIELD_T,
                    "Optimize not deleting all files",
                    Field.Store.YES, Field.Index.ANALYZED))
        d.add(Field(self.FIELD_C,
                    "Deleted When I run an optimize in our production environment.",
                    Field.Store.YES, Field.Index.ANALYZED))

        writer.addDocument(d)
        writer.close()

        self.searcher = IndexSearcher(rd, True)

    def search(self, q):
        return self.searcher.search(q, 50).totalHits

    def testElements(self):

        self.assertEqual(1, self.search(self.t1))
        self.assertEqual(1, self.search(self.t2))
        self.assertEqual(1, self.search(self.c1))
        self.assertEqual(1, self.search(self.c2))

    def testFlat(self):

        q = BooleanQuery()
        q.add(BooleanClause(self.t1, BooleanClause.Occur.SHOULD))
        q.add(BooleanClause(self.t2, BooleanClause.Occur.SHOULD))
        q.add(BooleanClause(self.c1, BooleanClause.Occur.SHOULD))
        q.add(BooleanClause(self.c2, BooleanClause.Occur.SHOULD))
        self.assertEqual(1, self.search(q))

    def testParenthesisMust(self):

        q3 = BooleanQuery()
        q3.add(BooleanClause(self.t1, BooleanClause.Occur.SHOULD))
        q3.add(BooleanClause(self.t2, BooleanClause.Occur.SHOULD))
        q4 = BooleanQuery()
        q4.add(BooleanClause(self.c1, BooleanClause.Occur.MUST))
        q4.add(BooleanClause(self.c2, BooleanClause.Occur.MUST))
        q2 = BooleanQuery()
        q2.add(q3, BooleanClause.Occur.SHOULD)
        q2.add(q4, BooleanClause.Occur.SHOULD)
        self.assertEqual(1, self.search(q2))

    def testParenthesisMust2(self):

        q3 = BooleanQuery()
        q3.add(BooleanClause(self.t1, BooleanClause.Occur.SHOULD))
        q3.add(BooleanClause(self.t2, BooleanClause.Occur.SHOULD))
        q4 = BooleanQuery()
        q4.add(BooleanClause(self.c1, BooleanClause.Occur.SHOULD))
        q4.add(BooleanClause(self.c2, BooleanClause.Occur.SHOULD))
        q2 = BooleanQuery()
        q2.add(q3, BooleanClause.Occur.SHOULD)
        q2.add(q4, BooleanClause.Occur.MUST)
        self.assertEqual(1, self.search(q2))

    def testParenthesisShould(self):

        q3 = BooleanQuery()
        q3.add(BooleanClause(self.t1, BooleanClause.Occur.SHOULD))
        q3.add(BooleanClause(self.t2, BooleanClause.Occur.SHOULD))
        q4 = BooleanQuery()
        q4.add(BooleanClause(self.c1, BooleanClause.Occur.SHOULD))
        q4.add(BooleanClause(self.c2, BooleanClause.Occur.SHOULD))
        q2 = BooleanQuery()
        q2.add(q3, BooleanClause.Occur.SHOULD)
        q2.add(q4, BooleanClause.Occur.SHOULD)
        self.assertEqual(1, self.search(q2))


if __name__ == "__main__":
    import sys, lucene
    lucene.initVM()
    if '-loop' in sys.argv:
        sys.argv.remove('-loop')
        while True:
            try:
                main()
            except:
                pass
    else:
         main()