/******************************************************************************
 * Copyright (c) 2024, Howard Butler (info@hobu.co)
 *
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 *       notice, this list of conditions and the following disclaimer.
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 *       with the distribution.
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#pragma once

#include <pdal/Filter.hpp>
#include <pdal/Streamable.hpp>

#include <memory>
#include <map>
#include <string>

namespace pdal
{

class PDAL_EXPORT ExpressionStatsFilter : public Filter,  public Streamable
{
public:
    ExpressionStatsFilter();
    ~ExpressionStatsFilter();

    struct Args;

    std::string getName() const;

private:
    std::unique_ptr<Args> m_args;

    virtual void addArgs(ProgramArgs& args);
    virtual void prepared(PointTableRef table);
    virtual bool processOne(PointRef& point);
    virtual void filter(PointView& view);
    virtual void done(PointTableRef table);

    Dimension::Id m_dimId;
    std::string m_dimName;
    std::map<std::string, std::map<double, point_count_t>> m_stats;

    void extractMetadata(PointTableRef table);
    ExpressionStatsFilter& operator=(const ExpressionStatsFilter&) = delete;
    ExpressionStatsFilter(const ExpressionStatsFilter&) = delete;
};

} // namespace pdal
