/******************************************************************************
 *
 * Project:  Feather Translator
 * Purpose:  Implements OGRFeatherDriver.
 * Author:   Even Rouault, <even.rouault at spatialys.com>
 *
 ******************************************************************************
 * Copyright (c) 2022, Planet Labs
 *
 * SPDX-License-Identifier: MIT
 ****************************************************************************/

#include "ogr_feather.h"

#include "../arrow_common/ograrrowwriterlayer.hpp"

/************************************************************************/
/*                      OGRFeatherWriterLayer()                         */
/************************************************************************/

OGRFeatherWriterLayer::OGRFeatherWriterLayer(
    GDALDataset *poDS, arrow::MemoryPool *poMemoryPool,
    const std::shared_ptr<arrow::io::OutputStream> &poOutputStream,
    const char *pszLayerName)
    : OGRArrowWriterLayer(poMemoryPool, poOutputStream, pszLayerName),
      m_poDS(poDS)
{
    m_bWriteFieldArrowExtensionName = true;
}

/************************************************************************/
/*                                Close()                               */
/************************************************************************/

bool OGRFeatherWriterLayer::Close()
{
    if (m_bInitializationOK)
    {
        if (!FinalizeWriting())
            return false;
    }

    return true;
}

/************************************************************************/
/*                       IsSupportedGeometryType()                      */
/************************************************************************/

bool OGRFeatherWriterLayer::IsSupportedGeometryType(
    OGRwkbGeometryType eGType) const
{
    if (eGType != wkbFlatten(eGType))
    {
        const auto osConfigOptionName =
            "OGR_" + GetDriverUCName() + "_ALLOW_ALL_DIMS";
        if (!CPLTestBool(CPLGetConfigOption(osConfigOptionName.c_str(), "NO")))
        {
            CPLError(CE_Failure, CPLE_NotSupported,
                     "Only 2D geometry types are supported (unless the "
                     "%s configuration option is set to YES)",
                     osConfigOptionName.c_str());
            return false;
        }
    }
    return true;
}

/************************************************************************/
/*                           SetOptions()                               */
/************************************************************************/

bool OGRFeatherWriterLayer::SetOptions(const std::string &osFilename,
                                       CSLConstList papszOptions,
                                       const OGRSpatialReference *poSpatialRef,
                                       OGRwkbGeometryType eGType)
{
    const char *pszDefaultFormat =
        (EQUAL(CPLGetExtensionSafe(osFilename.c_str()).c_str(), "arrows") ||
         STARTS_WITH_CI(osFilename.c_str(), "/vsistdout"))
            ? "STREAM"
            : "FILE";
    m_bStreamFormat =
        EQUAL(CSLFetchNameValueDef(papszOptions, "FORMAT", pszDefaultFormat),
              "STREAM");

    const char *pszGeomEncoding =
        CSLFetchNameValue(papszOptions, "GEOMETRY_ENCODING");
    m_eGeomEncoding = OGRArrowGeomEncoding::GEOARROW_STRUCT_GENERIC;
    if (pszGeomEncoding)
    {
        if (EQUAL(pszGeomEncoding, "WKB"))
            m_eGeomEncoding = OGRArrowGeomEncoding::WKB;
        else if (EQUAL(pszGeomEncoding, "WKT"))
            m_eGeomEncoding = OGRArrowGeomEncoding::WKT;
        else if (EQUAL(pszGeomEncoding, "GEOARROW_INTERLEAVED"))
            m_eGeomEncoding = OGRArrowGeomEncoding::GEOARROW_FSL_GENERIC;
        else if (EQUAL(pszGeomEncoding, "GEOARROW") ||
                 EQUAL(pszGeomEncoding, "GEOARROW_STRUCT"))
            m_eGeomEncoding = OGRArrowGeomEncoding::GEOARROW_STRUCT_GENERIC;
        else
        {
            CPLError(CE_Failure, CPLE_NotSupported,
                     "Unsupported GEOMETRY_ENCODING = %s", pszGeomEncoding);
            return false;
        }
    }

    if (eGType != wkbNone)
    {
        if (!IsSupportedGeometryType(eGType))
        {
            return false;
        }

        if (poSpatialRef == nullptr)
        {
            CPLError(CE_Warning, CPLE_AppDefined,
                     "Geometry column should have an associated CRS");
        }

        m_poFeatureDefn->SetGeomType(eGType);
        auto eGeomEncoding = m_eGeomEncoding;
        if (eGeomEncoding == OGRArrowGeomEncoding::GEOARROW_FSL_GENERIC ||
            eGeomEncoding == OGRArrowGeomEncoding::GEOARROW_STRUCT_GENERIC)
        {
            const auto eEncodingType = eGeomEncoding;
            eGeomEncoding = GetPreciseArrowGeomEncoding(eEncodingType, eGType);
            if (eGeomEncoding == eEncodingType)
                return false;
        }
        m_aeGeomEncoding.push_back(eGeomEncoding);
        m_poFeatureDefn->GetGeomFieldDefn(0)->SetName(
            CSLFetchNameValueDef(papszOptions, "GEOMETRY_NAME", "geometry"));
        if (poSpatialRef)
        {
            auto poSRS = poSpatialRef->Clone();
            m_poFeatureDefn->GetGeomFieldDefn(0)->SetSpatialRef(poSRS);
            poSRS->Release();
        }
    }

    m_osFIDColumn = CSLFetchNameValueDef(papszOptions, "FID", "");

    const char *pszCompression = CSLFetchNameValue(papszOptions, "COMPRESSION");
    if (pszCompression == nullptr)
    {
        auto oResult = arrow::util::Codec::GetCompressionType("lz4");
        if (oResult.ok() && arrow::util::Codec::IsAvailable(*oResult))
        {
            pszCompression = "LZ4";
        }
        else
        {
            pszCompression = "NONE";
        }
    }

    if (EQUAL(pszCompression, "NONE"))
        pszCompression = "UNCOMPRESSED";
    auto oResult = arrow::util::Codec::GetCompressionType(
        CPLString(pszCompression).tolower());
    if (!oResult.ok())
    {
        CPLError(CE_Failure, CPLE_NotSupported,
                 "Unrecognized compression method: %s", pszCompression);
        return false;
    }
    m_eCompression = *oResult;
    if (!arrow::util::Codec::IsAvailable(m_eCompression))
    {
        CPLError(CE_Failure, CPLE_NotSupported,
                 "Compression method %s is known, but libarrow has not "
                 "been built with support for it",
                 pszCompression);
        return false;
    }

    const char *pszRowGroupSize = CSLFetchNameValue(papszOptions, "BATCH_SIZE");
    if (pszRowGroupSize)
    {
        auto nRowGroupSize = static_cast<int64_t>(atoll(pszRowGroupSize));
        if (nRowGroupSize > 0)
        {
            if (nRowGroupSize > INT_MAX)
                nRowGroupSize = INT_MAX;
            m_nRowGroupSize = nRowGroupSize;
        }
    }

    m_bInitializationOK = true;
    return true;
}

/************************************************************************/
/*                         CloseFileWriter()                            */
/************************************************************************/

bool OGRFeatherWriterLayer::CloseFileWriter()
{
    auto status = m_poFileWriter->Close();
    if (!status.ok())
    {
        CPLError(CE_Failure, CPLE_AppDefined,
                 "FileWriter::Close() failed with %s",
                 status.message().c_str());
    }
    return status.ok();
}

/************************************************************************/
/*                          CreateSchema()                              */
/************************************************************************/

void OGRFeatherWriterLayer::CreateSchema()
{
    CreateSchemaCommon();

    if (m_poFeatureDefn->GetGeomFieldCount() != 0 &&
        CPLTestBool(CPLGetConfigOption("OGR_ARROW_WRITE_GEO", "YES")))
    {
        CPLJSONObject oRoot;
        oRoot.Add("schema_version", "0.1.0");
        oRoot.Add("primary_column",
                  m_poFeatureDefn->GetGeomFieldDefn(0)->GetNameRef());
        CPLJSONObject oColumns;
        oRoot.Add("columns", oColumns);
        for (int i = 0; i < m_poFeatureDefn->GetGeomFieldCount(); ++i)
        {
            const auto poGeomFieldDefn = m_poFeatureDefn->GetGeomFieldDefn(i);
            CPLJSONObject oColumn;
            oColumns.Add(poGeomFieldDefn->GetNameRef(), oColumn);
            oColumn.Add("encoding",
                        GetGeomEncodingAsString(m_aeGeomEncoding[i], false));

            const auto poSRS = poGeomFieldDefn->GetSpatialRef();
            if (poSRS)
            {
                const char *const apszOptions[] = {"FORMAT=WKT2_2019",
                                                   "MULTILINE=NO", nullptr};
                char *pszWKT = nullptr;
                poSRS->exportToWkt(&pszWKT, apszOptions);
                if (pszWKT)
                    oColumn.Add("crs", pszWKT);
                CPLFree(pszWKT);

                const double dfCoordEpoch = poSRS->GetCoordinateEpoch();
                if (dfCoordEpoch > 0)
                    oColumn.Add("epoch", dfCoordEpoch);
            }

#if 0
            if( m_aoEnvelopes[i].IsInit() &&
                CPLTestBool(CPLGetConfigOption(
                    "OGR_ARROW_WRITE_BBOX", "YES")) )
            {
                CPLJSONArray oBBOX;
                oBBOX.Add(m_aoEnvelopes[i].MinX);
                oBBOX.Add(m_aoEnvelopes[i].MinY);
                oBBOX.Add(m_aoEnvelopes[i].MaxX);
                oBBOX.Add(m_aoEnvelopes[i].MaxY);
                oColumn.Add("bbox", oBBOX);
            }
#endif
            const auto eType = poGeomFieldDefn->GetType();
            if (CPLTestBool(CPLGetConfigOption(
                    "OGR_ARROW_WRITE_GDAL_GEOMETRY_TYPE", "YES")) &&
                eType == wkbFlatten(eType))
            {
                // Geometry type, place under a temporary "gdal:geometry_type"
                // property pending acceptance of proposal at
                // https://github.com/opengeospatial/geoparquet/issues/41
                const char *pszType = "mixed";
                if (wkbPoint == eType)
                    pszType = "Point";
                else if (wkbLineString == eType)
                    pszType = "LineString";
                else if (wkbPolygon == eType)
                    pszType = "Polygon";
                else if (wkbMultiPoint == eType)
                    pszType = "MultiPoint";
                else if (wkbMultiLineString == eType)
                    pszType = "MultiLineString";
                else if (wkbMultiPolygon == eType)
                    pszType = "MultiPolygon";
                else if (wkbGeometryCollection == eType)
                    pszType = "GeometryCollection";
                oColumn.Add("gdal:geometry_type", pszType);
            }
        }

        auto kvMetadata = m_poSchema->metadata()
                              ? m_poSchema->metadata()->Copy()
                              : std::make_shared<arrow::KeyValueMetadata>();
        kvMetadata->Append("geo",
                           oRoot.Format(CPLJSONObject::PrettyFormat::Plain));
        m_poSchema = m_poSchema->WithMetadata(kvMetadata);
        CPLAssert(m_poSchema);
    }
}

/************************************************************************/
/*                          CreateWriter()                              */
/************************************************************************/

void OGRFeatherWriterLayer::CreateWriter()
{
    CPLAssert(m_poFileWriter == nullptr);

    if (m_poSchema == nullptr)
    {
        CreateSchema();
    }
    else
    {
        FinalizeSchema();
    }

    auto options = arrow::ipc::IpcWriteOptions::Defaults();
    options.memory_pool = m_poMemoryPool;

    {
        auto result = arrow::util::Codec::Create(m_eCompression);
        if (!result.ok())
        {
            CPLError(CE_Failure, CPLE_AppDefined,
                     "Codec::Create() failed with %s",
                     result.status().message().c_str());
        }
        else
        {
            options.codec.reset(result->release());
        }
    }

    if (m_bStreamFormat)
    {
        auto result =
            arrow::ipc::MakeStreamWriter(m_poOutputStream, m_poSchema, options);
        if (!result.ok())
        {
            CPLError(CE_Failure, CPLE_AppDefined,
                     "arrow::ipc::MakeStreamWriter() failed with %s",
                     result.status().message().c_str());
        }
        else
        {
            m_poFileWriter = *result;
        }
    }
    else
    {
        m_poFooterKeyValueMetadata =
            std::make_shared<arrow::KeyValueMetadata>();
        auto result = arrow::ipc::MakeFileWriter(
            m_poOutputStream, m_poSchema, options, m_poFooterKeyValueMetadata);
        if (!result.ok())
        {
            CPLError(CE_Failure, CPLE_AppDefined,
                     "arrow::ipc::MakeFileWriter() failed with %s",
                     result.status().message().c_str());
        }
        else
        {
            m_poFileWriter = *result;
        }
    }
}

/************************************************************************/
/*               PerformStepsBeforeFinalFlushGroup()                    */
/************************************************************************/

// Add a gdal:geo extension metadata for now, which embeds a bbox
void OGRFeatherWriterLayer::PerformStepsBeforeFinalFlushGroup()
{
    if (m_poFooterKeyValueMetadata &&
        m_poFeatureDefn->GetGeomFieldCount() != 0 &&
        CPLTestBool(CPLGetConfigOption("OGR_ARROW_WRITE_GDAL_FOOTER", "YES")))
    {
        CPLJSONObject oRoot;
        oRoot.Add("primary_column",
                  m_poFeatureDefn->GetGeomFieldDefn(0)->GetNameRef());
        CPLJSONObject oColumns;
        oRoot.Add("columns", oColumns);
        for (int i = 0; i < m_poFeatureDefn->GetGeomFieldCount(); ++i)
        {
            const auto poGeomFieldDefn = m_poFeatureDefn->GetGeomFieldDefn(i);
            CPLJSONObject oColumn;
            oColumns.Add(poGeomFieldDefn->GetNameRef(), oColumn);
            oColumn.Add("encoding",
                        GetGeomEncodingAsString(m_aeGeomEncoding[i], true));

            const auto poSRS = poGeomFieldDefn->GetSpatialRef();
            if (poSRS)
            {
                const char *const apszOptions[] = {"FORMAT=WKT2_2019",
                                                   "MULTILINE=NO", nullptr};
                char *pszWKT = nullptr;
                poSRS->exportToWkt(&pszWKT, apszOptions);
                if (pszWKT)
                    oColumn.Add("crs", pszWKT);
                CPLFree(pszWKT);

                const double dfCoordEpoch = poSRS->GetCoordinateEpoch();
                if (dfCoordEpoch > 0)
                    oColumn.Add("epoch", dfCoordEpoch);
            }

            if (m_aoEnvelopes[i].IsInit())
            {
                CPLJSONArray oBBOX;
                oBBOX.Add(m_aoEnvelopes[i].MinX);
                oBBOX.Add(m_aoEnvelopes[i].MinY);
                oBBOX.Add(m_aoEnvelopes[i].MaxX);
                oBBOX.Add(m_aoEnvelopes[i].MaxY);
                oColumn.Add("bbox", oBBOX);
            }
        }

        m_poFooterKeyValueMetadata->Append(
            GDAL_GEO_FOOTER_KEY,
            oRoot.Format(CPLJSONObject::PrettyFormat::Plain));
    }
}

/************************************************************************/
/*                            FlushGroup()                              */
/************************************************************************/

bool OGRFeatherWriterLayer::FlushGroup()
{
    std::vector<std::shared_ptr<arrow::Array>> columns;
    auto ret = WriteArrays(
        [&columns](const std::shared_ptr<arrow::Field> &,
                   const std::shared_ptr<arrow::Array> &array)
        {
            columns.emplace_back(array);
            return true;
        });

    if (ret)
    {
        auto poRecordBatch = arrow::RecordBatch::Make(
            m_poSchema, !columns.empty() ? columns[0]->length() : 0, columns);
        auto status = m_poFileWriter->WriteRecordBatch(*poRecordBatch);
        if (!status.ok())
        {
            CPLError(CE_Failure, CPLE_AppDefined,
                     "WriteRecordBatch() failed with %s",
                     status.message().c_str());
            ret = false;
        }
    }

    ClearArrayBuilers();
    return ret;
}

/************************************************************************/
/*                          WriteArrowBatch()                           */
/************************************************************************/

inline bool
OGRFeatherWriterLayer::WriteArrowBatch(const struct ArrowSchema *schema,
                                       struct ArrowArray *array,
                                       CSLConstList papszOptions)
{
    return WriteArrowBatchInternal(
        schema, array, papszOptions,
        [this](const std::shared_ptr<arrow::RecordBatch> &poBatch)
        {
            auto status = m_poFileWriter->WriteRecordBatch(*poBatch);
            if (!status.ok())
            {
                CPLError(CE_Failure, CPLE_AppDefined,
                         "WriteRecordBatch() failed: %s",
                         status.message().c_str());
                return false;
            }

            return true;
        });
}
