##############################################################################
#
# Copyright (c) 2001 Zope Corporation and Contributors. All Rights Reserved.
#
# This software is subject to the provisions of the Zope Public License,
# Version 2.0 (ZPL).  A copy of the ZPL should accompany this distribution.
# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
# FOR A PARTICULAR PURPOSE
#
##############################################################################

import os, sys, unittest

import ZODB
from Products.PluginIndexes.FieldIndex.FieldIndex import FieldIndex

class Dummy:

    def __init__( self, foo ):
        self._foo = foo

    def foo( self ):
        return self._foo

    def __str__( self ):
        return '<Dummy: %s>' % self._foo

    __repr__ = __str__

class TestCase( unittest.TestCase ):
    """
        Test FieldIndex objects.
    """

    def setUp( self ):
        """
        """
        self._index = FieldIndex( 'foo' )
        self._marker = []
        self._values = [ ( 0, Dummy( 'a' ) )
                       , ( 1, Dummy( 'ab' ) )
                       , ( 2, Dummy( 'abc' ) )
                       , ( 3, Dummy( 'abca' ) )
                       , ( 4, Dummy( 'abcd' ) )
                       , ( 5, Dummy( 'abce' ) )
                       , ( 6, Dummy( 'abce' ) )
                       , ( 7, Dummy( 0 ) ) #  Collector #1959
                       , ( 8, Dummy(None) )]
        self._forward = {}
        self._backward = {}
        for k, v in self._values:
            self._backward[k] = v
            keys = self._forward.get( v, [] )
            self._forward[v] = keys

        self._noop_req  = { 'bar': 123 }
        self._request   = { 'foo': 'abce' }
        self._min_req   = { 'foo': 'abc'
                          , 'foo_usage': 'range:min'
                          }
        self._max_req   = { 'foo': 'abc'
                          , 'foo_usage': 'range:max'
                          }
        self._range_req = { 'foo': ( 'abc', 'abcd' )
                          , 'foo_usage': 'range:min:max'
                          }
        self._zero_req  = { 'foo': 0 }
        self._none_req  = { 'foo': None }


    def tearDown( self ):
        """
        """

    def _populateIndex( self ):
        for k, v in self._values:
            self._index.index_object( k, v )

    def _checkApply( self, req, expectedValues ):
        result, used = self._index._apply_index( req )
        if hasattr(result, 'keys'):
            result = result.keys()
        assert used == ( 'foo', )
        assert len( result ) == len( expectedValues ), \
          '%s | %s' % ( map( None, result ), expectedValues )
        for k, v in expectedValues:
            assert k in result

    def testEmpty( self ):
        "Test an empty FieldIndex."

        assert len( self._index ) == 0
        assert len( self._index.referencedObjects() ) == 0

        assert self._index.getEntryForObject( 1234 ) is None
        assert ( self._index.getEntryForObject( 1234, self._marker )
                  is self._marker )
        self._index.unindex_object( 1234 ) # nothrow

        assert self._index.hasUniqueValuesFor( 'foo' )
        assert not self._index.hasUniqueValuesFor( 'bar' )
        assert len( self._index.uniqueValues( 'foo' ) ) == 0

        assert self._index._apply_index( self._noop_req ) is None
        self._checkApply( self._request, [] )
        self._checkApply( self._min_req, [] )
        self._checkApply( self._max_req, [] )
        self._checkApply( self._range_req, [] )

    def testPopulated( self ):
        """ Test a populated FieldIndex """
        self._populateIndex()
        values = self._values

        assert len( self._index ) == len( values )-1 #'abce' is duplicate
        assert len( self._index.referencedObjects() ) == len( values )

        assert self._index.getEntryForObject( 1234 ) is None
        assert ( self._index.getEntryForObject( 1234, self._marker )
                  is self._marker )
        self._index.unindex_object( 1234 ) # nothrow

        for k, v in values:
            assert self._index.getEntryForObject( k ) == v.foo()

        assert len( self._index.uniqueValues( 'foo' ) ) == len( values )-1

        assert self._index._apply_index( self._noop_req ) is None

        self._checkApply( self._request, values[ -4:-2 ] )
        self._checkApply( self._min_req, values[ 2:-2 ] )
        self._checkApply( self._max_req, values[ :3 ] + values[ -2: ] )
        self._checkApply( self._range_req, values[ 2:5 ] )

    def testZero( self ):
        """ Make sure 0 gets indexed """
        self._populateIndex()
        values = self._values
        self._checkApply( self._zero_req, values[ -2:-1 ] )
        assert 0 in self._index.uniqueValues( 'foo' )

    def testNone(self):
        """ make sure None gets indexed """
        self._populateIndex()
        values = self._values
        self._checkApply(self._none_req, values[-1:])
        assert None in self._index.uniqueValues('foo')

    def testReindex( self ):
        self._populateIndex()
        result, used = self._index._apply_index( {'foo':'abc'} )
        assert list(result)==[2]
        assert self._index.keyForDocument(2)=='abc'
        d = Dummy('world')
        self._index.index_object(2,d)
        result, used = self._index._apply_index( {'foo':'world'} )
        assert list(result)==[2]
        assert self._index.keyForDocument(2)=='world'
        del d._foo
        self._index.index_object(2,d)
        result, used = self._index._apply_index( {'foo':'world'} )
        assert list(result)==[]
        try:
            should_not_be = self._index.keyForDocument(2)
        except KeyError:
            # As expected, we deleted that attribute.
            pass
        else:
            # before Collector #291 this would be 'world'
            raise ValueError(repr(should_not_be))

    def testRange(self):
        """Test a range search"""
        index = FieldIndex( 'foo' )
        for i in range(100):
            index.index_object(i, Dummy(i%10))

        record = { 'foo' : { 'query'  : [-99, 3]
                           , 'range'  : 'min:max'
                           }
                 }
        r=index._apply_index( record )

        assert tuple(r[1])==('foo',), r[1]
        r=list(r[0].keys())

        expect=[
            0, 1, 2, 3, 10, 11, 12, 13, 20, 21, 22, 23, 30, 31, 32, 33,
            40, 41, 42, 43, 50, 51, 52, 53, 60, 61, 62, 63, 70, 71, 72, 73,
            80, 81, 82, 83, 90, 91, 92, 93
            ]

        assert r==expect, r

        #
        #   Make sure that range tests with incompatible paramters
        #   don't return empty sets.
        #
        record[ 'foo' ][ 'operator' ] = 'and'
        r2, ignore = index._apply_index( record )
        r2 = list( r2.keys() )

        assert r2 == r

def test_suite():
    return unittest.makeSuite( TestCase )

def main():
    unittest.TextTestRunner().run(test_suite())

if __name__ == '__main__':
    main()
