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

 *

 * Project:  GDAL

 * Purpose:  gdal "raster info" subcommand

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

 *

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

 * Copyright (c) 2024, Even Rouault <even dot rouault at spatialys.com>

 *

 * SPDX-License-Identifier: MIT

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

#include "gdalalg_raster_info.h"

#include "cpl_conv.h"

#include "gdal_priv.h"

#include "gdal_utils.h"

//! @cond Doxygen_Suppress

#ifndef _

#define _(x) (x)

#endif

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

/*          GDALRasterInfoAlgorithm::GDALRasterInfoAlgorithm()          */

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

GDALRasterInfoAlgorithm::GDALRasterInfoAlgorithm(bool standaloneStep,

                                                 bool openForMixedRasterVector)

    : GDALRasterPipelineStepAlgorithm(

          NAME, DESCRIPTION, HELP_URL,

          ConstructorOptions()

              .SetStandaloneStep(standaloneStep)

              .SetInputDatasetMaxCount(1)

              .SetAddDefaultArguments(false)

              .SetInputDatasetHelpMsg(_("Input raster dataset"))

              .SetInputDatasetAlias("dataset"))

{

    if (standaloneStep)

    {

        AddRasterInputArgs(openForMixedRasterVector,

                           /* hiddenForCLI = */ false);

    }

    else

    {

        AddRasterHiddenInputDatasetArg();

    }

    AddOutputFormatArg(&m_format).SetChoices("json", "text");

    AddArg("min-max", 0, _("Compute minimum and maximum value"), &m_minMax)

        .AddAlias("mm");

    AddArg("stats", 0, _("Retrieve or compute statistics, using all pixels"),

           &m_stats)

        .SetMutualExclusionGroup("stats");

    AddArg("approx-stats", 0,

           _("Retrieve or compute statistics, using a subset of pixels"),

           &m_approxStats)

        .SetMutualExclusionGroup("stats");

    AddArg("hist", 0, _("Retrieve or compute histogram"), &m_hist);

    AddArg("no-gcp", 0, _("Suppress ground control points list printing"),

           &m_noGCP)

        .SetCategory(GAAC_ADVANCED);

    AddArg("no-md", 0, _("Suppress metadata printing"), &m_noMD)

        .SetCategory(GAAC_ADVANCED);

    AddArg("no-ct", 0, _("Suppress color table printing"), &m_noCT)

        .SetCategory(GAAC_ADVANCED);

    AddArg("no-fl", 0, _("Suppress file list printing"), &m_noFL)

        .SetCategory(GAAC_ADVANCED);

    AddArg("checksum", 0, _("Compute pixel checksum"), &m_checksum)

        .SetCategory(GAAC_ADVANCED);

    AddArg("list-mdd", 0,

           _("List all metadata domains available for the dataset"), &m_listMDD)

        .AddAlias("list-metadata-domains")

        .SetCategory(GAAC_ADVANCED);

    AddArg("metadata-domain", 0,

           _("Report metadata for the specified domain. 'all' can be used to "

             "report metadata in all domains"),

           &m_mdd)

        .AddAlias("mdd")

        .SetCategory(GAAC_ADVANCED);

    AddArg("no-nodata", 0, _("Suppress retrieving nodata value"), &m_noNodata)

        .SetCategory(GAAC_ESOTERIC);

    AddArg("no-mask", 0, _("Suppress mask band information"), &m_noMask)

        .SetCategory(GAAC_ESOTERIC);

    AddArg("subdataset", 0,

           _("Use subdataset of specified index (starting at 1), instead of "

             "the source dataset itself"),

           &m_subDS)

        .SetCategory(GAAC_ESOTERIC)

        .SetMinValueIncluded(1);

    AddOutputStringArg(&m_output);

    AddStdoutArg(&m_stdout);

}

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

/*                  GDALRasterInfoAlgorithm::RunStep()                  */

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

bool GDALRasterInfoAlgorithm::RunStep(GDALPipelineStepRunContext &)

{

    CPLAssert(m_inputDataset.size() == 1);

    auto poSrcDS = m_inputDataset[0].GetDatasetRef();

    CPLAssert(poSrcDS);

    if (m_format.empty())

        m_format = IsCalledFromCommandLine() ? "text" : "json";

    CPLStringList aosOptions;

    if (m_format == "json")

        aosOptions.AddString("-json");

    if (m_minMax)

        aosOptions.AddString("-mm");

    if (m_stats)

        aosOptions.AddString("-stats");

    if (m_approxStats)

        aosOptions.AddString("-approx_stats");

    if (m_hist)

        aosOptions.AddString("-hist");

    if (m_noGCP)

        aosOptions.AddString("-nogcp");

    if (m_noMD)

        aosOptions.AddString("-nomd");

    if (m_noCT)

        aosOptions.AddString("-noct");

    if (m_noFL)

        aosOptions.AddString("-nofl");

    if (m_noMask)

        aosOptions.AddString("-nomask");

    if (m_noNodata)

        aosOptions.AddString("-nonodata");

    if (m_checksum)

        aosOptions.AddString("-checksum");

    if (m_listMDD)

        aosOptions.AddString("-listmdd");

    if (!m_mdd.empty())

    {

        aosOptions.AddString("-mdd");

        aosOptions.AddString(m_mdd.c_str());

    }

    GDALDatasetH hDS = GDALDataset::ToHandle(poSrcDS);

    std::unique_ptr<GDALDataset> poSubDataset;

    if (m_subDS > 0)

    {

        CSLConstList papszSubdatasets = GDALGetMetadata(hDS, "SUBDATASETS");

        const int nSubdatasets = CSLCount(papszSubdatasets) / 2;

        if (m_subDS > nSubdatasets)

        {

            CPLError(CE_Failure, CPLE_AppDefined,

                     "Invalid value for 'subdataset' argument. Should be "

                     "between 1 and %d",

                     nSubdatasets);

            return false;

        }

        char szKeyName[64];

        snprintf(szKeyName, sizeof(szKeyName), "SUBDATASET_%d_NAME", m_subDS);

        const std::string osSubDSName =

            CSLFetchNameValueDef(papszSubdatasets, szKeyName, "");

        poSubDataset.reset(GDALDataset::Open(

            osSubDSName.c_str(), GDAL_OF_RASTER | GDAL_OF_VERBOSE_ERROR,

            nullptr, nullptr, nullptr));

        if (!poSubDataset)

            return false;

        hDS = GDALDataset::ToHandle(poSubDataset.get());

    }

    if (m_stdout)

    {

        aosOptions.AddString("-stdout");

    }

    GDALInfoOptions *psOptions = GDALInfoOptionsNew(aosOptions.List(), nullptr);

    char *ret = GDALInfo(hDS, psOptions);

    GDALInfoOptionsFree(psOptions);

    const bool bOK = ret != nullptr;

    if (ret)

    {

        m_output = ret;

    }

    CPLFree(ret);

    return bOK;

}

GDALRasterInfoAlgorithmStandalone::~GDALRasterInfoAlgorithmStandalone() =

    default;

//! @endcond