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 * Copyright (c) 2019, Hobu Inc.
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#pragma once

#include <pdal/pdal_internal.hpp>

class OGRCoordinateTransformation;
class OGRSpatialReference;

namespace pdal
{

class SpatialReference;

class PDAL_DLL SrsTransform
{
public:
    /// Object that performs transformation from a \src spatial reference
    /// to a \dest spatial reference.
    SrsTransform();
    SrsTransform(const SrsTransform& src);
    SrsTransform(SrsTransform&& src);
    SrsTransform& operator=(SrsTransform&& src);
    SrsTransform(const OGRSpatialReference& src, const OGRSpatialReference& dst);
    SrsTransform(const SpatialReference& src, const SpatialReference& dst);
    SrsTransform(const SpatialReference& src, std::vector<int> srcOrder,
                 const SpatialReference& dst, std::vector<int> dstOrder);
    ~SrsTransform();

    void set(OGRSpatialReference src, OGRSpatialReference dst);
    void set(const SpatialReference& src, const SpatialReference& dst);

    /// Get the underlying transformation.
    /// \return  Pointer to the underlying coordinate transform.
    OGRCoordinateTransformation *get() const;

    /// Transform the X, Y and Z of a point in place.
    /// \param x  X coordinate
    /// \param y  Y coordinate
    /// \param z  Z coordinate
    /// \return  True if the transformation was successful
    bool transform(double& x, double& y, double& z) const;

    /// Transform a set of points in place.
    /// \param x  X coordinates
    /// \param y  Y coordinates
    /// \param z  Z coordinates
    /// \return  True if the transformation was successful
    bool transform(std::vector<double>& x, std::vector<double>& y,
        std::vector<double>& z) const;

    /// Determine if this represents a valid transform.
    /// \return  Whether the transform is valid or not.
    bool valid() const
    { return (bool)m_transform.get(); }

private:
    std::unique_ptr<OGRCoordinateTransformation> m_transform;
};

} // namespace pdal