/**
 *    Copyright (C) 2018-present MongoDB, Inc.
 *
 *    This program is free software: you can redistribute it and/or modify
 *    it under the terms of the Server Side Public License, version 1,
 *    as published by MongoDB, Inc.
 *
 *    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
 *    Server Side Public License for more details.
 *
 *    You should have received a copy of the Server Side Public License
 *    along with this program. If not, see
 *    <http://www.mongodb.com/licensing/server-side-public-license>.
 *
 *    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 Server Side 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.
 */

#pragma once

#include <set>
#include <string>
#include <vector>

#include "mongo/db/fts/fts_query.h"

namespace mongo {

namespace fts {

class FTSTokenizer;

class FTSQueryImpl final : public FTSQuery {
public:
    Status parse(TextIndexVersion textIndexVersion) final;

    std::unique_ptr<FTSQuery> clone() const final;

    const std::set<std::string>& getPositiveTerms() const {
        return _positiveTerms;
    }
    const std::set<std::string>& getNegatedTerms() const {
        return _negatedTerms;
    }
    const std::vector<std::string>& getPositivePhr() const {
        return _positivePhrases;
    }
    const std::vector<std::string>& getNegatedPhr() const {
        return _negatedPhrases;
    }

    const std::set<std::string>& getTermsForBounds() const {
        return _termsForBounds;
    }

    /**
     * Returns a BSON object with the following format:
     * {
     *   terms: <array of positive terms>,
     *   negatedTerms: <array of negative terms>,
     *   phrases: <array of positive phrases>,
     *   negatedPhrases: <array of negative phrases>
     * }
     */
    BSONObj toBSON() const;

private:
    void _addTerms(FTSTokenizer* tokenizer, const std::string& tokens, bool negated);

    std::set<std::string> _positiveTerms;
    std::set<std::string> _negatedTerms;
    std::vector<std::string> _positivePhrases;
    std::vector<std::string> _negatedPhrases;
    std::set<std::string> _termsForBounds;
};
}
}