/**
 *    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 xbeven 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.
 */

#pragma once

#include <string>
#include <vector>

#include "mongo/base/string_data.h"
#include "mongo/db/jsobj.h"
#include "mongo/db/namespace_string.h"
#include "mongo/s/bson_serializable.h"
#include "mongo/s/write_ops/batched_delete_document.h"
#include "mongo/s/write_ops/batched_request_metadata.h"

namespace mongo {

    /**
     * This class represents the layout and content of a batched delete runCommand,
     * the request side.
     */
    class BatchedDeleteRequest : public BSONSerializable {
        MONGO_DISALLOW_COPYING(BatchedDeleteRequest);
    public:

        //
        // schema declarations
        //

        // Name used for the batched delete invocation.
        static const std::string BATCHED_DELETE_REQUEST;

        // Field names and types in the batched delete command type.
        static const BSONField<std::string> collName;
        static const BSONField<std::vector<BatchedDeleteDocument*> > deletes;
        static const BSONField<BSONObj> writeConcern;
        static const BSONField<bool> ordered;
        static const BSONField<BSONObj> metadata;

        //
        // construction / destruction
        //

        BatchedDeleteRequest();
        virtual ~BatchedDeleteRequest();

        /** Copies all the fields present in 'this' to 'other'. */
        void cloneTo(BatchedDeleteRequest* other) const;

        //
        // bson serializable interface implementation
        //

        virtual bool isValid(std::string* errMsg) const;
        virtual BSONObj toBSON() const;
        virtual bool parseBSON(const BSONObj& source, std::string* errMsg);
        virtual void clear();
        virtual std::string toString() const;

        //
        // individual field accessors
        //

        void setCollName(StringData collName);
        void setCollNameNS(const NamespaceString& collName);
        const std::string& getCollName() const;
        const NamespaceString& getCollNameNS() const;

        const NamespaceString& getTargetingNSS() const;

        void setDeletes(const std::vector<BatchedDeleteDocument*>& deletes);

        /**
         * deletes ownership is transferred to here.
         */
        void addToDeletes(BatchedDeleteDocument* deletes);
        void unsetDeletes();
        bool isDeletesSet() const;
        std::size_t sizeDeletes() const;
        const std::vector<BatchedDeleteDocument*>& getDeletes() const;
        const BatchedDeleteDocument* getDeletesAt(std::size_t pos) const;

        void setWriteConcern(const BSONObj& writeConcern);
        void unsetWriteConcern();
        bool isWriteConcernSet() const;
        const BSONObj& getWriteConcern() const;

        void setOrdered(bool ordered);
        void unsetOrdered();
        bool isOrderedSet() const;
        bool getOrdered() const;

        /*
         * metadata ownership will be transferred to this.
         */
        void setMetadata(BatchedRequestMetadata* metadata);
        void unsetMetadata();
        bool isMetadataSet() const;
        BatchedRequestMetadata* getMetadata() const;

        /**
         * These are no-ops since delete never validates documents. They only exist to fulfill the
         * unified API.
         */
        void setShouldBypassValidation(bool newVal) {}
        bool shouldBypassValidation() const { return false; }

    private:
        // Convention: (M)andatory, (O)ptional

        // (M)  collection we're deleting from
        NamespaceString _collName;
        bool _isCollNameSet;

        // (M)  array of individual deletes
        std::vector<BatchedDeleteDocument*> _deletes;
        bool _isDeletesSet;

        // (O)  to be issued after the batch applied
        BSONObj _writeConcern;
        bool _isWriteConcernSet;

        // (O)  whether batch is issued in parallel or not
        bool _ordered;
        bool _isOrderedSet;

        // (O)  metadata associated with this request for internal use.
        std::unique_ptr<BatchedRequestMetadata> _metadata;
    };

} // namespace mongo