/**
 *    Copyright (C) 2013 10gen Inc.
 *
 *    This program is free software: you can redistribute it and/or  modify
 *    it under the terms of the GNU Affero General Public License, version 3,
 *    as published by the Free Software Foundation.
 *
 *    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 Affero General Public License for more details.
 *
 *    You should have received a copy of the GNU Affero General Public License
 *    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 *    As a special exception, the copyright holders give permission to link the
 *    code of portions of this program with the OpenSSL library under certain
 *    conditions as described in each individual source file and distribute
 *    linked combinations including the program with the OpenSSL library. You
 *    must comply with the GNU Affero General Public License in all respects
 *    for all of the code used other than as permitted herein. If you modify
 *    file(s) with this exception, you may extend this exception to your
 *    version of the file(s), but you are not obligated to do so. If you do not
 *    wish to do so, delete this exception statement from your version. If you
 *    delete this exception statement from all source files in the program,
 *    then also delete it in the license file.
 */

#include "mongo/db/range_arithmetic.h"
#include "mongo/unittest/unittest.h"

namespace {

    using mongo::MINKEY;
    using mongo::MAXKEY;
    using mongo::rangeOverlaps;
    using mongo::rangeMapOverlaps;
    using mongo::RangeMap;
    using mongo::RangeVector;
    using std::make_pair;

    TEST(BSONRange, SmallerLowerRangeNonSubset) {
        ASSERT_TRUE(rangeOverlaps(BSON("x" << 100), BSON("x" << 200),
                                  BSON("x" << 50), BSON("x" << 200)));
        ASSERT_TRUE(rangeOverlaps(BSON("x" << 100), BSON("x" << 200),
                                  BSON("x" << 60), BSON("x" << 199)));

        ASSERT_FALSE(rangeOverlaps(BSON("x" << 100), BSON("x" << 200),
                                   BSON("x" << 70), BSON("x" << 99)));
        ASSERT_FALSE(rangeOverlaps(BSON("x" << 100), BSON("x" << 200),
                                   BSON("x" << 80), BSON("x" << 100)));
    }

    TEST(BSONRange, BiggerUpperRangeNonSubset) {
        ASSERT_TRUE(rangeOverlaps(BSON("x" << 100), BSON("x" << 200),
                                  BSON("x" << 150), BSON("x" << 200)));
        ASSERT_TRUE(rangeOverlaps(BSON("x" << 100), BSON("x" << 200),
                                  BSON("x" << 160), BSON("x" << 201)));
        ASSERT_TRUE(rangeOverlaps(BSON("x" << 100), BSON("x" << 200),
                                  BSON("x" << 170), BSON("x" << 220)));

        ASSERT_FALSE(rangeOverlaps(BSON("x" << 100), BSON("x" << 200),
                                   BSON("x" << 200), BSON("x" << 240)));
    }

    TEST(BSONRange, RangeIsSubsetOfOther) {
        ASSERT_TRUE(rangeOverlaps(BSON("x" << 100), BSON("x" << 200),
                                  BSON("x" << 70), BSON("x" << 300)));
        ASSERT_TRUE(rangeOverlaps(BSON("x" << 100), BSON("x" << 200),
                                  BSON("x" << 140), BSON("x" << 180)));
    }

    TEST(BSONRange, EqualRange) {
        ASSERT_TRUE(rangeOverlaps(BSON("x" << 100), BSON("x" << 200),
                                  BSON("x" << 100), BSON("x" << 200)));
    }

    TEST(RangeMap, RangeMapOverlap) {

        RangeMap rangeMap;
        rangeMap.insert( make_pair( BSON( "x" << 100 ), BSON( "x" << 200 ) ) );
        rangeMap.insert( make_pair( BSON( "x" << 200 ), BSON( "x" << 300 ) ) );
        rangeMap.insert( make_pair( BSON( "x" << 300 ), BSON( "x" << 400 ) ) );

        RangeVector overlap;
        getRangeMapOverlap( rangeMap, BSON( "x" << 50 ), BSON( "x" << 350 ), &overlap );

        ASSERT( !overlap.empty() );
        ASSERT_EQUALS( overlap.size(), 3u );
    }

    TEST(RangeMap, RangeMapOverlapPartial) {

        RangeMap rangeMap;
        rangeMap.insert( make_pair( BSON( "x" << 100 ), BSON( "x" << 200 ) ) );
        rangeMap.insert( make_pair( BSON( "x" << 200 ), BSON( "x" << 300 ) ) );

        RangeVector overlap;
        getRangeMapOverlap( rangeMap, BSON( "x" << 150 ), BSON( "x" << 250 ), &overlap );

        ASSERT( !overlap.empty() );
        ASSERT_EQUALS( overlap.size(), 2u );
    }

    TEST(RangeMap, RangeMapOverlapInner) {

        RangeMap rangeMap;
        rangeMap.insert( make_pair( BSON( "x" << 100 ), BSON( "x" << 200 ) ) );

        RangeVector overlap;
        getRangeMapOverlap( rangeMap, BSON( "x" << 125 ), BSON( "x" << 150 ), &overlap );

        ASSERT( !overlap.empty() );
        ASSERT_EQUALS( overlap.size(), 1u );
    }

    TEST(RangeMap, RangeMapNoOverlap) {

        RangeMap rangeMap;
        rangeMap.insert( make_pair( BSON( "x" << 100 ), BSON( "x" << 200 ) ) );
        rangeMap.insert( make_pair( BSON( "x" << 300 ), BSON( "x" << 400 ) ) );

        RangeVector overlap;
        getRangeMapOverlap( rangeMap, BSON( "x" << 200 ), BSON( "x" << 300 ), &overlap );

        ASSERT( overlap.empty() );
    }

    TEST(RangeMap, RangeMapOverlaps) {

        RangeMap rangeMap;
        rangeMap.insert( make_pair( BSON( "x" << 100 ), BSON( "x" << 200 ) ) );

        ASSERT( rangeMapOverlaps( rangeMap, BSON( "x" << 100 ), BSON( "x" << 200 ) ) );
        ASSERT( rangeMapOverlaps( rangeMap, BSON( "x" << 99 ), BSON( "x" << 200 ) ) );
        ASSERT( rangeMapOverlaps( rangeMap, BSON( "x" << 100 ), BSON( "x" << 201 ) ) );
        ASSERT( rangeMapOverlaps( rangeMap, BSON( "x" << 100 ), BSON( "x" << 200 ) ) );
        ASSERT( !rangeMapOverlaps( rangeMap, BSON( "x" << 99 ), BSON( "x" << 100 ) ) );
        ASSERT( !rangeMapOverlaps( rangeMap, BSON( "x" << 200 ), BSON( "x" << 201 ) ) );
    }

    TEST(RangeMap, RangeMapContains) {

        RangeMap rangeMap;
        rangeMap.insert( make_pair( BSON( "x" << 100 ), BSON( "x" << 200 ) ) );

        ASSERT( rangeMapContains( rangeMap, BSON( "x" << 100 ), BSON( "x" << 200 ) ) );
        ASSERT( !rangeMapContains( rangeMap, BSON( "x" << 99 ), BSON( "x" << 200 ) ) );
        ASSERT( !rangeMapContains( rangeMap, BSON( "x" << 100 ), BSON( "x" << 201 ) ) );
    }

    TEST(RangeMap, RangeMapContainsMinMax) {

        RangeMap rangeMap;
        rangeMap.insert( make_pair( BSON( "x" << MINKEY ), BSON( "x" << MAXKEY ) ) );

        ASSERT( rangeMapContains( rangeMap, BSON( "x" << MINKEY ), BSON( "x" << MAXKEY ) ) );
        ASSERT( !rangeMapContains( rangeMap, BSON( "x" << 1 ), BSON( "x" << MAXKEY ) ) );
        ASSERT( !rangeMapContains( rangeMap, BSON( "x" << MINKEY ), BSON( "x" << 1 ) ) );
    }
}