/******************************************************************************

 *

 * Project:  GDAL

 * Purpose:  gdal "raster viewshed" subcommand

 * Author:   Even Rouault <even dot rouault at spatialys.com>

 *

 ******************************************************************************

 * Copyright (c) 2025, Even Rouault <even dot rouault at spatialys.com>

 *

 * SPDX-License-Identifier: MIT

 ****************************************************************************/

#ifndef GDALALG_RASTER_VIEWSHED_INCLUDED

#define GDALALG_RASTER_VIEWSHED_INCLUDED

#include "gdalalg_raster_pipeline.h"

#include "viewshed/viewshed_types.h"

//! @cond Doxygen_Suppress

/************************************************************************/

/*                     GDALRasterViewshedAlgorithm                      */

/************************************************************************/

class GDALRasterViewshedAlgorithm /* non final */

    : public GDALRasterPipelineNonNativelyStreamingAlgorithm

{

  public:

    static constexpr const char *NAME = "viewshed";

    static constexpr const char *DESCRIPTION =

        "Compute the viewshed of a raster dataset.";

    static constexpr const char *HELP_URL =

        "/programs/gdal_raster_viewshed.html";

    explicit GDALRasterViewshedAlgorithm(bool standaloneStep = false);

  private:

    bool RunStep(GDALPipelineStepRunContext &ctxt) override;

    std::vector<double> m_observerPos{};

    gdal::viewshed::Options m_opts{};

    std::string m_outputMode = "normal";

    int m_band = 1;

    int m_numThreads = 3;

    GDALArgDatasetValue m_sdFilename{};

    // Work variables

    std::string m_numThreadsStr{};

};

/************************************************************************/

/*                GDALRasterViewshedAlgorithmStandalone                 */

/************************************************************************/

class GDALRasterViewshedAlgorithmStandalone final

    : public GDALRasterViewshedAlgorithm

{

  public:

    GDALRasterViewshedAlgorithmStandalone()

        : GDALRasterViewshedAlgorithm(/* standaloneStep = */ true)

    {

    }

    ~GDALRasterViewshedAlgorithmStandalone() override;

};

//! @endcond

#endif