/* ****************************************************************************
 * Copyright 2019 Open Systems Development BV                                 *
 *                                                                            *
 * Permission is hereby granted, free of charge, to any person obtaining a    *
 * copy of this software and associated documentation files (the "Software"), *
 * to deal in the Software without restriction, including without limitation  *
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,   *
 * and/or sell copies of the Software, and to permit persons to whom the      *
 * Software is furnished to do so, subject to the following conditions:       *
 *                                                                            *
 * The above copyright notice and this permission notice shall be included in *
 * all copies or substantial portions of the Software.                        *
 *                                                                            *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR *
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,   *
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL    *
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER *
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING    *
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER        *
 * DEALINGS IN THE SOFTWARE.                                                  *
 * ***************************************************************************/
#include "ormdata.h"
#include "ormtable.h"
#include "ormhandler.h"
#include "log.h"
#include "multisortfilterproxymodel.h"

#include <QSqlError>
#include <QSqlRecord>
#include <QSqlField>
#include <QSqlQuery>

#include <QtDebug>
#include <QtCore/qnamespace.h>

using namespace osdev::components;

OrmTable::OrmTable(const DbConnector &db, QObject *_parent)
    : QSqlRelationalTableModel( _parent, db.getDatabase() )
    , m_className( "OrmTable" )
    , m_recTrackField()
    , m_db( db )
    , m_qhRelTables()
    , m_qhRelations()
    , m_qhFieldTypes()
    , m_qhTimelines()
{
    if ( !QSqlRelationalTableModel::database().isOpen() )
    {
        LogWarning( m_className, "Database is closed.");
    }
}

OrmTable::~OrmTable()
{
}

void OrmTable::setTable( const QString& _table )
{
    // Set tablename in the base class
    QSqlRelationalTableModel::setTable( m_db.quoteTableName( _table ) );
    m_className += "::" + this->tableName();

    // Make every change being written to the database.
    QSqlRelationalTableModel::setEditStrategy( QSqlTableModel::OnRowChange );

    // Now we know the tablename, we can retrieve the fieldtypes by their name. To prevent a functioncall
    // For each and every fieldname we're looking for, we store this in an internal Hash. Must be quicker than
    // then accessing the database layer.
    m_qhFieldTypes = m_db.getFieldNamesAndTypes( _table );

    QSqlRecord _headerData = QSqlRelationalTableModel::database().record( m_db.quoteTableName( _table ) );
    for( int nCount = 0; nCount < _headerData.count(); nCount++ )
    {
        QSqlRelationalTableModel::setHeaderData( nCount, Qt::Horizontal, _headerData.fieldName(nCount) );
    }

    // Now the table is set, headerinfo loaded and commit behaviour set :
    // Open the table and read from the database.
    QSqlRelationalTableModel::select();
}

bool OrmTable::insertRecord( int _row, const QSqlRecord &_record )
{
    if ( QSqlRelationalTableModel::database().isOpen() )
    {
        LogDebug( m_className, "Database is open." );
    }
    else
    {
        LogWarning( m_className, "Database is closed." );
    }

    bool b_result = QSqlRelationalTableModel::insertRecord( _row, _record );

    if ( !b_result )
    {
        LogError( QString( "[OrmTable - %1]" ).arg( QSqlRelationalTableModel::tableName() ),
                  QString( "Database gave error :  %1")
                  .arg( this->lastError().text() ) );
    }

    return b_result;
}

bool OrmTable::insertRecords(int row, const QList<QSqlRecord>& _records )
{
    bool l_bResult = true;

    QSqlRelationalTableModel::setEditStrategy( QSqlTableModel::OnRowChange );
    for( const QSqlRecord& _record : _records )
    {
        l_bResult &= insertRecord( row, _record );
    }
    QSqlRelationalTableModel::submitAll();

    // Reset the transaction method.
    QSqlRelationalTableModel::setEditStrategy( QSqlTableModel::OnRowChange );

    return l_bResult;
}

void OrmTable::writeData( const QSharedPointer<ORMRelData>& dataObject )
{
    // Reset the filter for this table before doing anything else
    this->resetFilter();

    // Relations can be set on different fields. We have to take in account those
    // fields could be given in a list.
    ORMData* pMainTable = this->solveRelations( dataObject );
    if( nullptr == pMainTable || pMainTable->getContainerName().isEmpty() )
    {
        LogDebug( "[OrmTable::writeData]", QString( "No maintable defined. Exiting..." ) );
        emit signalRejectedData( dataObject );
        return;
    }

    bool updateSuccess = false;
    /// Here we check for the variable list. See if one of the variables is of type :
    /// QVariant( QList<Qvariant) ) Instead of a normal update, we should use
    /// a batched_update.
    if( pMainTable->hasLists() )
    {
        /// @todo: This is kind of a special case. For now we assume there is an inclusive
        /// and exclusive way of updating these records. All these updates should be done
        /// in a single transaction. The 'not-mentioned records' should be de-coupled.
        /// If those fail, the entire package should be rejected, including the ones that were
        /// mentioned. Default behaviour is "Each - change - a - transaction" so we need some
        /// extra precautions here.

        // Check if all items in the list exist in the database. If not the package is rejected.
        if (!m_db.recordsExist(pMainTable->getContainerName(), pMainTable->getKeyField(), pMainTable->getValue( pMainTable->getKeyField() ).toList()))
        {
            LogInfo( "[OrmTable::writeData]", "Not all records are present. Package is rejected." );
            emit signalRejectedData( dataObject );
            return;
        }

        // Set the TransactionScopeGuard. If it goes out-of-scope, for whatever reason,
        // it will do a Rollback if a transaction was started.
        OrmTransGuard l_scopeGuard;

        // Check to see if the database supports transactions
        if( m_db.supportTransactions() )
        {
            if( !m_db.transactionBegin() )
            {
                LogDebug( "[OrmTable::writeData]", "Transaction failed to start." );
                emit signalRejectedData( dataObject );
                return;
            }
            l_scopeGuard = OrmTransGuard( m_db );
        }

        std::unique_ptr<ORMData> mainTableCopy(pMainTable->clone());
        updateSuccess = batchUpdate( mainTableCopy.get(), dataObject->getSourceId() );
        if( !updateSuccess )
        {
            emit signalRejectedData( dataObject );
            return;
        }

        if( ( static_cast<int>(TableActions::actionMergeUpdate) == mainTableCopy->getDefaultAction() )
            && ( !mainTableCopy->isMergeable() ) )    // If there is more than one key besides the keyfield, we cannot handle this (yet)
        {
            LogWarning( "[OrmTable::writeData]", QString( "Dataobject (ORMData) is not fit for mergeUpdate and is discarded : %1" ).arg( mainTableCopy->asString() ) );
            return;
        }

        if( ( static_cast<int>(TableActions::actionMergeUpdate) == mainTableCopy->getDefaultAction() )
            && ( mainTableCopy->isMergeable() ) )
        {
            deCoupleRecords( mainTableCopy.get() );
        }
        else if (static_cast<int>(TableActions::actionUpdate) == mainTableCopy->getDefaultAction())
        {
            LogDebug( "[OrmTable::writeData]", QString( "Action is a \"normal\" update : %1" ).arg( mainTableCopy->asString() ) );
        }

        if( !this->commit() )
        {
            emit signalRejectedData( dataObject );
        }
        auto timeline = m_qhTimelines[dataObject->getSourceId()];
        if (timeline)
        {
            timeline->commit();
        }
        return;
    }
    else
    {
        if( static_cast<int>(TableActions::actionUpdate) == pMainTable->getDefaultAction() )
        {
            // ===================================================================================
            // ==                    S I N G L E   R E C O R D  U P D A T E                     ==
            // ===================================================================================

            // See if we can actually update this record by checking its timestamp validity.
            //
            if( m_recTrackField.isEmpty() || m_recTrackField.isNull() )
            {
                updateSuccess = this->updateRecord( pMainTable );
            }
            else
            {
                if( this->isPackageValid( pMainTable ) )
                {
                    pMainTable->setValue( m_recTrackField, QVariant( pMainTable->timeStamp() ) );
                    updateSuccess = this->updateRecord( pMainTable );
                }
                else
                {
                    // Nope. Package is older. Discard.
                    LogInfo( "[OrmTable::writeData]", QString( "Discarding package because it is older than information in the database" ) );
                    return;
                }
            }
        }

        if( updateSuccess )
        {
            return;
        }
    }

    // ===================================================================================
    // ==                                 I N S E R T                                   ==
    // ===================================================================================
    // If a timestamp is used in the database, add it to the table definition.
    if( !m_recTrackField.isEmpty() || !m_recTrackField.isNull() )
    {
        pMainTable->setValue( m_recTrackField, pMainTable->timeStamp() );
    }


    // If we get to here, we're ready to create the new SQLRecord and add it to the table.
    QSqlRecord newRecord = this->buildSqlRecord( pMainTable );
    if( !newRecord.isEmpty() )
    {
        if( !m_db.createRecord( newRecord, this->tableName() ) )
        {
            // @todo : Change to a more database dependant, generic error checking based on keywords....
            if( this->lastError().text().contains( "violates unique constraint" ) ||
                this->lastError().text().contains( "violates not-null constraint" ) )
            {
                // Just drop the package and be done with it. This is a unique constraint violation
                LogDebug( "[OrmTable::writeData]", QString( "There was and error creating the record : %1" ).arg( this->lastError().text() ) );
                return;
            }
            else
            {
                LogDebug( "[OrmTable::writeData]", QString( "There was and error creating the record : %1" ).arg( this->lastError().text() ) );
                LogDebug( "[OrmTable::writeData]", "Deferring the datapackage to the TransQueue." );
                emit signalRejectedData( dataObject );
            }

        }
        else
        {
            return;
        }
    }
    else
    {
        LogDebug( "[OrmTable::writeData]", QString( "Creating the new record failed.! : %1" ).arg( this->lastError().text() ) );
    }
}

bool OrmTable::updateRecord( ORMData* dataObject )
{

    auto lNumRecords = tableFilter( dataObject );
    if( lNumRecords > 1 )
    {
        LogError( "[OrmTable::updateRecord]", QString( "Multiple records found..." ) );
        return false;
    }
    else if( lNumRecords == 0 )
    {
        LogWarning( "[OrmTable::updateRecord]", QString( "No record found...Falling back to insert...." ) );
        return false;
    }
    else
    {
        // All criteria are met.. Time to update the record.
        // Each and and every field will be written, with the exception of the keyfield..
        // First get a list of all field names.
        bool updateSuccess = true;
        QStringList fieldNames = dataObject->getFieldNames();
        for( const QString& fieldName : fieldNames  )
        {
            if( fieldName != dataObject->getKeyField() )
            {
                int colIndex = this->fieldIndex( fieldName );
                if( -1 == colIndex )
                {
                    LogError( "[OrmTable::updateRecord]", QString( "No index found for : %1" ).arg( fieldName ) );
                }
                else
                {
                    LogDebug( "[OrmTable::updateRecord]", QString( "Updating field : %1 (Index : %2) with value : %3" )
                             .arg( fieldName )
                             .arg( colIndex )
                             .arg( dataObject->getValue( fieldName ).toString() ) );

                    this->setData( this->index( 0, colIndex ),
                                   ConversionUtils::convertToType(dataObject->getValue( fieldName ) ,m_qhFieldTypes.value( fieldName )),
                                   Qt::EditRole );
                }
            }
            else
            {
                LogDebug( "[OrmTable::updateRecord]", QString( "Skipping keyfield %1 ..." ).arg( fieldName ) );
            }
        }

        // Process all changes.
        updateSuccess = this->submit();
        if( !updateSuccess )
        {
            LogError( "[OrmTable::updateRecord]",
                      QString( "Record failed to update, Database gave error :  %1").arg( this->lastError().text() ) );
        }

        this->setFilter( "" );
        this->select();
        return updateSuccess;
    }
}

bool OrmTable::batchUpdate( ORMData* dataObject, const QUuid& sourceId )
{
    // If MergedUpdate = true, we have to do an ex- and inclusive update.
    // (Inclusive meaning everyting that is mentioned, Exclusive : everything that is not in range..)
    // Similar to WHERE <field> NOT IN ( <VALUE1>, <Value2>, <VALUE..> )

    QString fieldName;

    // Get all fields to update, without the keyfield.
    // We only support a single field update at this moment.
    for( const auto& fn : dataObject->getFieldNames() )
    {
        if( fn != dataObject->getKeyField() )
        {
            fieldName = fn;
            break;
        }
    }

    auto timeline = m_qhTimelines[sourceId];
    if (!timeline)
    {
        auto pTimeline = QSharedPointer<Timeline>::create();
        timeline.swap(pTimeline);
        m_qhTimelines[sourceId] = timeline;
    }
    OrmBatchChange obc(Timestamp(dataObject->timeStamp()), dataObject->getValue( fieldName ), OrmBatchChange::toSet(dataObject->getValue( dataObject->getKeyField() ).toList()));
    auto proposed = timeline->evaluate(obc, static_cast<int>(TableActions::actionMergeUpdate) == dataObject->getDefaultAction());

    if (!proposed.valid())
    {
        LogInfo( "[OrmTable::batchUpdate]", "Proposed update will not be executed" );
        return false;
    }
    dataObject->setValue( dataObject->getKeyField(), OrmBatchChange::toList(proposed.changeSet()));
    QString strTable = dataObject->getContainerName();
    return m_db.associate(strTable, dataObject->getKeyField(), dataObject->getValue( dataObject->getKeyField() ).toList(), fieldName, dataObject->getValue( fieldName ));
}

bool OrmTable::deCoupleRecords( ORMData* dataObject )
{
    QString fieldName;

    // Get all fields to update, without the keyfield.
    // We only support a single field update at this moment.
    for( const auto& fn : dataObject->getFieldNames() )
    {
        if( fn != dataObject->getKeyField() )
        {
            fieldName = fn;
            break;
        }
    }
    QString strTable = dataObject->getContainerName();
    return m_db.disassociate(strTable, dataObject->getKeyField(), dataObject->getValue( dataObject->getKeyField() ).toList(), fieldName, dataObject->getValue( fieldName ));
}

QList<OrmTableRow> OrmTable::readData( const QString& fieldName, const QString& filterExp )
{
    int columnIndex = this->fieldIndex( fieldName );
    QSortFilterProxyModel filterModel;
    filterModel.setSourceModel( this );

    if( columnIndex > -1 )
    {

        filterModel.setFilterKeyColumn( columnIndex );
        filterModel.setFilterRegExp( QRegExp( filterExp, Qt::CaseSensitive, QRegExp::Wildcard ) );
    }

    if( filterModel.rowCount() > 0 )
    {
        // Looks like there was a result. Pack into a structure..
        int rows = filterModel.rowCount();
        int columns = filterModel.columnCount();

        // For each row and column, iterate the data structure..
        for( int _rowCount = 0; _rowCount < rows; _rowCount++ )
        {
            qDebug() << "=____";
            for( int _colCount = 0; _colCount < columns; _colCount++ )
            {
                qDebug() << filterModel.headerData( _colCount, Qt::Horizontal, Qt::DisplayRole ) << " : "
                         << filterModel.data( filterModel.index( _rowCount, _colCount ), Qt::DisplayRole );
            }
        }
    }

    return QList<OrmTableRow>();
}

QList<DbRelation *> OrmTable::getRelationsByTableName( const QString& _tableName )
{
    QList<DbRelation*>  lstResult;

    for( auto relName : m_qhRelations.keys() )
    {
        if( m_qhRelations.value( relName )->foreignTable() == _tableName )
        {
            lstResult.append( m_qhRelations.value( relName ) );
        }
    }

    return lstResult;
}

QSqlRecord OrmTable::buildSqlRecord( ORMData* tableObject )
{
    LogDebug( "[OrmTable::buildSqlRecord]", QString( "Building record with : %1 " ).arg( tableObject->asString() ) );
    QStringList fieldNames = tableObject->getFieldNames();
    QSqlRecord sqlRecord;
    for( const QString& fieldName : fieldNames )
    {
        if( fieldName != "container" )
        {
            QSqlField sqlField( fieldName, m_qhFieldTypes.value( fieldName ) );
            sqlField.setValue( ConversionUtils::convertToType( tableObject->getValue( fieldName ),        // The value
                                                         m_qhFieldTypes.value( fieldName ) ) );     // The Type
            sqlRecord.append( sqlField );
        }
    }

    return sqlRecord;
}

void OrmTable::setRelatedTable(const QString& _tableName, QSortFilterProxyModel* pTable)
{
    m_qhRelTables.insert( _tableName, pTable );
}

QSortFilterProxyModel* OrmTable::getRelatedTable(const QString& _tableName) const
{
    return m_qhRelTables.value( _tableName );
}


void OrmTable::saveRelation( const QString& relationName, DbRelation* pRelation )
{
    LogDebug( "[OrmTable::saveRelation]", QString( "Saving Relation : %1" ).arg( relationName ) );
    m_qhRelations.insert( relationName, pRelation );
}

DbRelation* OrmTable::getRelation( const QString& relationName ) const
{
    return m_qhRelations.value( relationName, nullptr );
}

QStringList OrmTable::getRelationNames() const
{
    return QStringList( m_qhRelations.keys() );
}

ORMData* OrmTable::solveRelations( const QSharedPointer<ORMRelData>& dataObject )
{
    // First we get the Maintable.... This will be our return object.
    ORMData* pMainTable = dataObject->getMainTableContainer();
    if( nullptr == pMainTable )
    {
        return nullptr;
    }

    if( pMainTable->hasLists() )
    {
        LogWarning( "OrmTable::solveRelations", QString( "Maintable has Lists.... : %1" ).arg( pMainTable->asString() ) );
    }

    QStringList constraintList  = this->getRelationNames();

    for( auto constraint : constraintList )
    {
        const DbRelation* l_relation = QPointer<DbRelation>( this->getRelation( constraint ) );
        QString  foreignPrimKey;
        QString  foreignFieldName;
        QVariant foreignFieldValue;

        LogDebug("[OrmTable::solveRelations]", QString("Get related table %1").arg(l_relation->foreignTable()));
        ORMData* pTable = dataObject->getRelatedContainer( l_relation->foreignTable() );
        if( nullptr != pTable )
        {
            // We assume there is only 1 relation between two tables
            int numFields = pTable->getFieldCount();
            if( 0 == numFields )
            {
                LogWarning( "[OrmTable::solveRelations]", QString( "No relations found to table : %1 " ).arg( l_relation->foreignTable() ) );
                return nullptr;
            }
            else if( 1 == numFields )
            {
                foreignPrimKey   = l_relation->foreignPrimKey();
                foreignFieldName = pTable->getFieldNames().first();
                // ===========================================================================================
                //                  L I S T   O R   S I N G L E   V A L U E   R E L A T I O N
                // ===========================================================================================
                foreignFieldValue = pTable->getValue( foreignFieldName );
                if( foreignFieldValue.isNull() )
                {
                    // Some constraints are allowed to be absent. For now treat this constraint as such.
                    // If it is needed afterall it will prevent the write in a later stage
                    pMainTable->setValue( l_relation->indexColumn(), QVariant() );
                    continue;
                }

                // Looks like we have all data collected. Retrieve the Primary key value needed.
                // If foreignPrimKey is empty it will be retrieved from the database meta data.
                QVariant l_primKeyValue = m_db.getRelationKey( l_relation->foreignTable(), foreignFieldName, foreignFieldValue, foreignPrimKey );
                if( !l_primKeyValue.isNull() )
                {
                    // We have a value of the IndexColumn. Complete the mainTable....
                    pMainTable->setValue( l_relation->indexColumn(), l_primKeyValue );
                }
                else
                {
                    LogError( "[OrmTable::solveRelations]", QString( "No primary key found for table : %1 " ).arg( l_relation->foreignTable() ) );
                    return nullptr;
                }
                // ===========================================================================================
            }
            else
            {
                /// @todo : At this moment we don't handle multiple relations. Lotsplitting is requiring this, so it must be implemented as soon as
                ///         the requirements are defined.
                LogError( "[OrmTable::solveRelations]", QString( "multiple relations found to table : %1 " ).arg( l_relation->foreignTable() ) );
                return nullptr;
            }
        }
        else
        {
            LogDebug( "[OrmTable::solveRelations]", QString( "Unresolved constraint %1. We assume all data is provided by the object.." ).arg( constraint ) );
        }
    }

    return pMainTable;
}

int OrmTable::tableFilter( ORMData* dataObject )
{
    int nResult = -1;

    // Check for a valid pointer.
    if( nullptr == dataObject )
    {
        LogError( "[OrmTable::tableFilter]", QString( "No data structure given." ) );
        return 0;
    }

    // Check if update is the default action
    if( static_cast<int>(TableActions::actionUpdate) != dataObject->getDefaultAction() )
    {
        LogWarning( "[OrmTable::tableFilter]", QString( "Update is not the default action for table : %1" ).arg( dataObject->getContainerName() ) );
        return 0;
    }

    /// @todo : Create an AND / OR filter.
    // +----------------------------------+
    // | Keyfield | KeyValue | TypeFilter |
    // +----------+----------+------------+
    // |   = 1    |    = 1   |   equals   |
    // |   = 1    |    > 1   |     OR     | ( WHERE IN ( a, b, c, d...) )
    // |   > x    |    > y   |     AND    | ( x equals y)
    // |   <> KV  |   <> KF  |   INVALID  |
    // +----------+----------+------------+
    //
    // Check if there is a record that matches our criteria.

    const auto keyFields = dataObject->getKeyFieldList();

    for (const auto& field : keyFields)
    {
        if( this->fieldIndex(field) == -1 )
        {
            LogWarning( "[OrmTable::tableFilter]", QString( "No columnIndex found for : %1" ).arg(field) );
            return 0;
        }
    }

    QString strFilter;
    const auto numberOfKeys = keyFields.length();

    if (0 == numberOfKeys)
    {
        LogWarning( "[OrmTable::tableFilter]", QString( "No keyField given for table : %1" ).arg( dataObject->getContainerName() ) );
        return 0;
    }
    else if (1 == numberOfKeys)
    {
        const auto& keyField = *keyFields.begin();

        if( dataObject->getValue( keyField ).type() == QVariant::List ) // OR
        {
            QList<QVariant> tmpList = dataObject->getValue( keyField ).toList();
            for( int lstCount = 0; lstCount < tmpList.count(); lstCount++ )
            {
                if( tmpList.at(lstCount).type() == QVariant::Int )
                {
                    strFilter += keyField + "=" + tmpList.at( lstCount ).toString();
                }
                else
                {
                    strFilter += "\"" + keyField + "\"='" + tmpList.at( lstCount ).toString().replace("{","").replace("}","") + "'";
                }

                if( ( lstCount + 1 ) < tmpList.count() )
                {
                    strFilter += " OR ";
                }
            }
        }
        else // equals
        {
            if( dataObject->getValue( keyField ).type() == QVariant::Int )
            {
                strFilter = "\"" + keyField + "\"="+ dataObject->getValue( keyField ).toString();
            }
            else
            {
                strFilter = "\"" + keyField + "\"='" + dataObject->getValue( keyField ).toString().replace("{","").replace("}","") + "'";
            }
        }
    }
    else // numberOfKeys > 1, AND
    {
        // =========================================================
        // @todo: Setup a multiple fields filter. For now it is just a multiple values value filter.

        auto iter = keyFields.constBegin();
        while (keyFields.constEnd() != iter)
        {
            if( dataObject->getValue( *iter ).type() == QVariant::Int )
            {
                strFilter += "\"" + *iter + "\"=" + dataObject->getValue( *iter ).toString();
            }
            else
            {
                strFilter += "\"" + *iter + "\"='" + dataObject->getValue( *iter ).toString().replace("{","").replace("}","") + "'";
            }

            ++iter;

            if( keyFields.end() != iter )
            {
                strFilter += " AND ";
            }
        }
    }

    this->setFilter( strFilter );
    LogDebug( "[OrmTable::tableFilter]", QString( "Filter : %1" ).arg( this->filter() ) );
    if( this->select() )
    {
        nResult = this->rowCount();
    }
    else
    {
        LogError( "[OrmTable::tableFilter]", QString( "There was a problem executing the query : %1" ).arg( this->selectStatement() ) );
    }
    // =========================================================
    return nResult;
}

int OrmTable::resetFilter()
{
    this->setFilter( "" );
    this->select();
    return rowCount();
}

bool OrmTable::isPackageValid( ORMData* dataObject )
{
    if( nullptr == dataObject )
    {
        LogError( "[OrmTable::isPackageValid]", "No ORMData dataobject passed." );
        return false;
    }

    // Determine the field indices for the proxy filter
    auto keyFields = dataObject->getKeyFieldList();
    QList<qint32> fieldIndices;
    auto iter = keyFields.begin();
    while (keyFields.end() != iter)
    {
        auto idx = this->fieldIndex(*iter);
        if (idx > -1)
        {
            fieldIndices.push_back(idx);
            ++iter;
        }
        else
        {
            LogWarning("[OrmTable::isPackageValid]", QString("Keyfield \"%1\" is unknown. Not using it in filter.").arg(*iter));
            iter = keyFields.erase(iter);
        }
    }

    // Create the filter model and set its filter criteria
    MultiSortFilterProxyModel oModelFilter;
    oModelFilter.setFilterKeyColumns( fieldIndices );

    // Build the filter expression.
    for (qint32 i = 0; i < fieldIndices.size(); ++i)
    {
        oModelFilter.setFilterFixedString( fieldIndices[i], QString( "%1" ).arg( dataObject->getValue( keyFields[i] ).toString() ) );
    }

    // Attach filter to this table model.
    oModelFilter.setSourceModel( this );

    // If the number of record = 1, we seem to have found our record.
    if( 0 == oModelFilter.rowCount() )
    {
        // Seems like we are good to go.
        // This is a first timer...
        LogDebug("[OrmTable::isPackageValid]", "No record found");
        return true;
    }
    else if ( 1 == oModelFilter.rowCount() )
    {
        QModelIndex modIndex = oModelFilter.index( 0, this->fieldIndex( m_recTrackField ) );
        unsigned long long tmp_timestamp = oModelFilter.data( modIndex, Qt::DisplayRole ).toULongLong();

        if( dataObject->timeStamp() > tmp_timestamp )
        {
            return true;
        }
    }
    else
    {
        LogError( "[OrmTable::isPackageValid]", QString( "Multiple records found (%1) for %2 with value %3" )
                                                    .arg( oModelFilter.rowCount() )
                                                    .arg( dataObject->getKeyField() )
                                                    .arg( dataObject->getValue( dataObject->getKeyField() ).toString() ) );
    }
    return false;
}

bool OrmTable::commit()
{
    if( m_db.supportTransactions() )
    {
        if( m_db.transactionCommit() )
        {
            return true;
        }
        else
        {
            LogWarning( "[OrmTable::commit]", QString( "Transaction failed to commit with error : %1" )
                        .arg( m_db.getDatabase().driver()->lastError().text() ) );
        }
    }
    else
    {
        if( m_db.getDatabase().driver()->lastError().driverText().isEmpty() )
        {
            return true;
        }
        else
        {
            LogDebug( "[OrmTable::commit]", QString( "Transaction not supported but last query failed with error : %1" )
                      .arg( m_db.getDatabase().driver()->lastError().driverText() ) );
        }
    }
    return false;
}