/******************************************************************************
 * $Id: ogrnaslayer.cpp 32898 2016-01-10 14:44:10Z goatbar $
 *
 * Project:  OGR
 * Purpose:  Implements OGRNASLayer class.
 * Author:   Frank Warmerdam, warmerdam@pobox.com
 *
 ******************************************************************************
 * Copyright (c) 2002, Frank Warmerdam <warmerdam@pobox.com>
 * Copyright (c) 2010-2013, Even Rouault <even dot rouault at mines-paris dot org>
 *
 * 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 "cpl_conv.h"
#include "cpl_port.h"
#include "cpl_string.h"
#include "ogr_nas.h"

CPL_CVSID("$Id: ogrnaslayer.cpp 32898 2016-01-10 14:44:10Z goatbar $");

/************************************************************************/
/*                           OGRNASLayer()                              */
/************************************************************************/

OGRNASLayer::OGRNASLayer( const char * pszName,
                          OGRSpatialReference *poSRSIn,
                          OGRwkbGeometryType eReqType,
                          OGRNASDataSource *poDSIn ) :
    poSRS((poSRSIn != NULL) ? poSRSIn->Clone() : NULL),
    poFeatureDefn(new OGRFeatureDefn(
        pszName + (STARTS_WITH_CI(pszName, "ogr:") ? 4 : 0))),
    iNextNASId(0),
    poDS(poDSIn),
    // Readers should get the corresponding NASFeatureClass and cache it.
    poFClass(poDS->GetReader()->GetClass( pszName ))
{
    SetDescription( poFeatureDefn->GetName() );
    poFeatureDefn->Reference();
    poFeatureDefn->GetGeomFieldDefn(0)->SetSpatialRef(poSRS);
    poFeatureDefn->SetGeomType( eReqType );
}

/************************************************************************/
/*                           ~OGRNASLayer()                           */
/************************************************************************/

OGRNASLayer::~OGRNASLayer()

{
    if( poFeatureDefn )
        poFeatureDefn->Release();

    if( poSRS != NULL )
        poSRS->Release();
}

/************************************************************************/
/*                            ResetReading()                            */
/************************************************************************/

void OGRNASLayer::ResetReading()

{
    iNextNASId = 0;
    poDS->GetReader()->ResetReading();
    if (poFClass)
        poDS->GetReader()->SetFilteredClassName(poFClass->GetName());
}

/************************************************************************/
/*                           GetNextFeature()                           */
/************************************************************************/

OGRFeature *OGRNASLayer::GetNextFeature()

{
    GMLFeature  *poNASFeature = NULL;
    OGRGeometry *poGeom = NULL;

    if( iNextNASId == 0 )
        ResetReading();

/* ==================================================================== */
/*      Loop till we find and translate a feature meeting all our       */
/*      requirements.                                                   */
/* ==================================================================== */
    while( true )
    {
/* -------------------------------------------------------------------- */
/*      Cleanup last feature, and get a new raw nas feature.            */
/* -------------------------------------------------------------------- */
        delete poNASFeature;
        delete poGeom;

        poNASFeature = NULL;
        poGeom = NULL;

        poNASFeature = poDS->GetReader()->NextFeature();
        if( poNASFeature == NULL )
            return NULL;

/* -------------------------------------------------------------------- */
/*      Is it of the proper feature class?                              */
/* -------------------------------------------------------------------- */

        // We count reading low level NAS features as a feature read for
        // work checking purposes, though at least we didn't necessary
        // have to turn it into an OGRFeature.
        m_nFeaturesRead++;

        if( poNASFeature->GetClass() != poFClass )
            continue;

        iNextNASId++;

/* -------------------------------------------------------------------- */
/*      Does it satisfy the spatial query, if there is one?             */
/* -------------------------------------------------------------------- */
        const CPLXMLNode* const * papsGeometry =
            poNASFeature->GetGeometryList();
        if (papsGeometry[0] != NULL)
        {
            poGeom = (OGRGeometry*) OGR_G_CreateFromGMLTree(papsGeometry[0]);
            poGeom = NASReader::ConvertGeometry(poGeom);
            poGeom = OGRGeometryFactory::forceTo(poGeom, GetGeomType());
            // poGeom->dumpReadable( 0, "NAS: " );

            // We assume the OGR_G_CreateFromGMLTree() function would
            // have already reported an error.
            if( poGeom == NULL )
            {
                delete poNASFeature;
                return NULL;
            }

            if( m_poFilterGeom != NULL && !FilterGeometry( poGeom ) )
                continue;
        }

/* -------------------------------------------------------------------- */
/*      Convert the whole feature into an OGRFeature.                   */
/* -------------------------------------------------------------------- */
        OGRFeature *poOGRFeature = new OGRFeature( GetLayerDefn() );

        poOGRFeature->SetFID( iNextNASId );

        for( int iField = 0; iField < poFClass->GetPropertyCount(); iField++ )
        {
            const GMLProperty *psGMLProperty =
                poNASFeature->GetProperty( iField );
            if( psGMLProperty == NULL || psGMLProperty->nSubProperties == 0 )
                continue;

            switch( poFClass->GetProperty(iField)->GetType()  )
            {
              case GMLPT_Real:
              {
                  poOGRFeature->SetField(
                      iField, CPLAtof(psGMLProperty->papszSubProperties[0]) );
              }
              break;

              case GMLPT_IntegerList:
              {
                  int nCount = psGMLProperty->nSubProperties;
                  int *panIntList = static_cast<int *>(
                      CPLMalloc(sizeof(int) * nCount ) );

                  for( int i = 0; i < nCount; i++ )
                      panIntList[i] =
                          atoi(psGMLProperty->papszSubProperties[i]);

                  poOGRFeature->SetField( iField, nCount, panIntList );
                  CPLFree( panIntList );
              }
              break;

              case GMLPT_RealList:
              {
                  int nCount = psGMLProperty->nSubProperties;
                  double *padfList = static_cast<double *>(
                      CPLMalloc(sizeof(double)*nCount) );

                  for( int i = 0; i < nCount; i++ )
                      padfList[i] =
                          CPLAtof(psGMLProperty->papszSubProperties[i]);

                  poOGRFeature->SetField( iField, nCount, padfList );
                  CPLFree( padfList );
              }
              break;

              case GMLPT_StringList:
              {
                  poOGRFeature->SetField(
                      iField, psGMLProperty->papszSubProperties );
              }
              break;

              default:
                poOGRFeature->SetField(
                    iField, psGMLProperty->papszSubProperties[0] );
                break;
            }
        }

        poOGRFeature->SetGeometryDirectly( poGeom );
        poGeom = NULL;

/* -------------------------------------------------------------------- */
/*      Test against the attribute query.                               */
/* -------------------------------------------------------------------- */
        if( m_poAttrQuery != NULL
            && !m_poAttrQuery->Evaluate( poOGRFeature ) )
        {
            delete poOGRFeature;
            continue;
        }

/* -------------------------------------------------------------------- */
/*      Wow, we got our desired feature. Return it.                     */
/* -------------------------------------------------------------------- */
        delete poNASFeature;

        return poOGRFeature;
    }

    return NULL;
}

/************************************************************************/
/*                          GetFeatureCount()                           */
/************************************************************************/

GIntBig OGRNASLayer::GetFeatureCount( int bForce )

{
    if( poFClass == NULL )
        return 0;

    if( m_poFilterGeom != NULL || m_poAttrQuery != NULL )
        return OGRLayer::GetFeatureCount( bForce );

    return poFClass->GetFeatureCount();
}

/************************************************************************/
/*                             GetExtent()                              */
/************************************************************************/

OGRErr OGRNASLayer::GetExtent(OGREnvelope *psExtent, int bForce )

{
    double dfXMin;
    double dfXMax;
    double dfYMin;
    double dfYMax;

    if( poFClass != NULL &&
        poFClass->GetExtents( &dfXMin, &dfXMax, &dfYMin, &dfYMax ) )
    {
        psExtent->MinX = dfXMin;
        psExtent->MaxX = dfXMax;
        psExtent->MinY = dfYMin;
        psExtent->MaxY = dfYMax;

        return OGRERR_NONE;
    }

    return OGRLayer::GetExtent( psExtent, bForce );
}

/************************************************************************/
/*                           TestCapability()                           */
/************************************************************************/

int OGRNASLayer::TestCapability( const char * pszCap )

{
    if( EQUAL(pszCap,OLCFastGetExtent) )
    {
        double  dfXMin;
        double  dfXMax;
        double  dfYMin;
        double  dfYMax;

        if( poFClass == NULL )
            return FALSE;

        return poFClass->GetExtents( &dfXMin, &dfXMax, &dfYMin, &dfYMax );
    }

    if( EQUAL(pszCap,OLCFastFeatureCount) )
    {
        if( poFClass == NULL
            || m_poFilterGeom != NULL
            || m_poAttrQuery != NULL )
            return FALSE;

        return poFClass->GetFeatureCount() != -1;
    }

    if( EQUAL(pszCap,OLCStringsAsUTF8) )
        return TRUE;

    return FALSE;
}
