/*
  Copyright (c) 2010, 2013, 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();

    // NDB API operations
    virtual void runOperations(int nOps);
    virtual void runInserts(XMode mode, int nOps);
    virtual void runLookups(XMode mode, int nOps);
    virtual void runUpdates(XMode mode, int nOps);
    virtual void runDeletes(XMode mode, int nOps);
    void initNdbapiBuffers(int nOps);
    void closeNdbapiBuffers(int nOps);
    void ndbapiInsert(int c0);
    void ndbapiLookup(int c0);
    void ndbapiRead(int c0);
    void ndbapiUpdate(int c0);
    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);
    virtual void initOperations();
    virtual void closeOperations();

    // NDB API datastore operations
    virtual void initConnection();
    virtual void closeConnection();
    virtual void clearData();
};

#endif // NdbapiTwsDriver_hpp
