/* -*- mode: c++; c-basic-offset: 4; indent-tabs-mode: nil; -*-
 *  vim:expandtab:shiftwidth=4:tabstop=4:smarttab:
 *
 *  Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; version 2 of the License.
 *
 *  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 General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

#ifndef NdbApiTwsDriver_hpp
#define NdbApiTwsDriver_hpp

#include "TwsDriver.hpp"

#include <NdbApi.hpp>
#include <NdbError.hpp>

using std::string;

struct NdbApiTwsModel {
    const NdbDictionary::Table* table_t0;
    const NdbDictionary::Column* column_c0;
    const NdbDictionary::Column* column_c1;
    const NdbDictionary::Column* column_c2;
    const NdbDictionary::Column* column_c3;
    const NdbDictionary::Column* column_c4;
    const NdbDictionary::Column* column_c5;
    const NdbDictionary::Column* column_c6;
    const NdbDictionary::Column* column_c7;
    const NdbDictionary::Column* column_c8;
    const NdbDictionary::Column* column_c9;
    const NdbDictionary::Column* column_c10;
    const NdbDictionary::Column* column_c11;
    const NdbDictionary::Column* column_c12;
    const NdbDictionary::Column* column_c13;
    const NdbDictionary::Column* column_c14;

    int attr_c0;
    int attr_c1;
    int attr_c2;
    int attr_c3;
    int attr_c4;
    int attr_c5;
    int attr_c6;
    int attr_c7;
    int attr_c8;
    int attr_c9;
    int attr_c10;
    int attr_c11;
    int attr_c12;
    int attr_c13;
    int attr_c14;

    int width_c0;
    int width_c1;
    int width_c2;
    int width_c3;
    int width_c4;
    int width_c5;
    int width_c6;
    int width_c7;
    int width_c8;
    int width_c9;
    int width_c10;
    int width_c11;
    int width_c12;
    int width_c13;
    int width_c14;
    int width_row; // sum of {width_c0 .. width_c14}
    static const int nCols = 15;

    NdbApiTwsModel(Ndb* ndb);

    ~NdbApiTwsModel() {}

    static int columnWidth(const NdbDictionary::Column* c) {
        int s = c->getSize(); // size of type or of base type
        int al = c->getLength(); // length or max length, 1 for scalars
        int at = c->getArrayType(); // size of length prefix, practically
        return (s * al) + at;
    }

private:

    NdbApiTwsModel(const NdbApiTwsModel&);
    NdbApiTwsModel& operator=(const NdbApiTwsModel&);
};

class NdbApiTwsDriver : public TwsDriver {
public:

    NdbApiTwsDriver()
        : mgmd(NULL), ndb(NULL), tx(NULL), model(NULL), bb(NULL), ra(NULL) {
    }

    virtual ~NdbApiTwsDriver() {
        assert(mgmd == NULL); assert(ndb == NULL); assert(tx == NULL);
        assert(model == NULL); assert(bb == NULL); assert(ra == NULL);
    }

private:

    NdbApiTwsDriver(const NdbApiTwsDriver&);
    NdbApiTwsDriver& operator=(const NdbApiTwsDriver&);

protected:

    // NDB API settings
    string mgmdConnect;
    string catalog;
    string schema;

    // NDB API resources
    Ndb_cluster_connection* mgmd;
    Ndb* ndb;
    NdbTransaction* tx;
    NdbOperation::LockMode ndbOpLockMode;

    // NDB Api metadata resources
    NdbApiTwsModel* model;

    // NDB Api data resources
    char* bb;
    char* bb_pos;
    NdbRecAttr** ra;
    NdbRecAttr** ra_pos;

    // NDB API intializers/finalizers
    virtual void init();
    virtual void close();
    virtual void initProperties();
    virtual void printProperties();
    void initNdbapiBuffers();
    void closeNdbapiBuffers();

    // NDB API operations
    virtual void runLoadOperations();
    void runNdbapiInsert(XMode mode);
    void ndbapiInsert(int c0);
    void runNdbapiLookup(XMode mode);
    void ndbapiLookup(int c0);
    void ndbapiRead(int c0);
    void runNdbapiUpdate(XMode mode);
    void ndbapiUpdate(int c0);
    void runNdbapiDelete(XMode mode);
    void ndbapiDelete(int c0);
    void ndbapiBeginTransaction();
    void ndbapiExecuteTransaction();
    void ndbapiCommitTransaction();
    void ndbapiCloseTransaction();
    static void ndbapiToBuffer1blp(void* to, const char* from, size_t width);
    static void ndbapiToString1blp(char* to, const void* from, size_t width);

    // NDB API datastore operations
    virtual void initConnection();
    virtual void closeConnection();
    //virtual void clearPersistenceContext(); // not used
    //virtual void clearData(); // not used
};

#endif // NdbApiTwsDriver_hpp
