/******************************************************************************
* Copyright (c) 2011, Michael P. Gerlek (mpg@flaxen.com)
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following
* conditions are met:
*
*     * Redistributions of source code must retain the above copyright
*       notice, this list of conditions and the following disclaimer.
*     * Redistributions in binary form must reproduce the above copyright
*       notice, this list of conditions and the following disclaimer in
*       the documentation and/or other materials provided
*       with the distribution.
*     * Neither the name of Hobu, Inc. or Flaxen Geo Consulting nor the
*       names of its contributors may be used to endorse or promote
*       products derived from this software without specific prior
*       written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
****************************************************************************/

#pragma once

#include <pdal/Stage.hpp>
#include <pdal/Options.hpp>

#include <functional>

namespace pdal
{

class Reader;

namespace expr
{
    class ConditionalExpression;
}

class PDAL_DLL Reader : public virtual Stage
{
public:
    typedef std::function<void(PointView&, PointId)> PointReadFunc;

    Reader()
    {}

    void setReadCb(PointReadFunc cb)
        { m_cb = cb; }
    point_count_t count() const
        { return m_count; }

    using Stage::setSpatialReference;

protected:
    std::string m_filename;
    point_count_t m_count;
    PointReadFunc m_cb;
    Arg *m_filenameArg;
    Arg *m_countArg;

    SpatialReference m_overrideSrs;
    SpatialReference m_defaultSrs;

    virtual void setSpatialReference(MetadataNode& m,
            const SpatialReference& srs);

private:
    virtual PointViewSet run(PointViewPtr view)
    {
        PointViewSet viewSet;

        view->clearTemps();
        read(view, m_count);
        viewSet.insert(view);
        return viewSet;
    }
    virtual void l_initialize(PointTableRef table) final;
    virtual void l_addArgs(ProgramArgs& args) final;
    virtual void l_prepared(PointTableRef table) final;

    virtual const expr::ConditionalExpression* whereExpr() const;
    virtual WhereMergeMode mergeMode() const;
    virtual point_count_t read(PointViewPtr /*view*/, point_count_t /*num*/)
        { return 0; }
};

} // namespace pdal