/******************************************************************************
* Copyright (c) 2014, Howard Butler, howard@hobu.co
*
* 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,
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
****************************************************************************/

#include "FerryFilter.hpp"

#include <pdal/util/Algorithm.hpp>
#include <pdal/util/ProgramArgs.hpp>

namespace pdal
{

static StaticPluginInfo const s_info
{
    "filters.ferry",
    "Copy data from one dimension to another.",
    "http://pdal.io/stages/filters.ferry.html"
};

CREATE_STATIC_STAGE(FerryFilter, s_info)

std::string FerryFilter::getName() const { return s_info.name; }

void FerryFilter::addArgs(ProgramArgs& args)
{
    args.add("dimensions", "List of dimensions to ferry",
        m_dimSpec).setPositional();
}


void FerryFilter::initialize()
{
    std::vector<std::string> toNames;
    for (auto& dim : m_dimSpec)
    {
        StringList s = Utils::split(dim, '=');
        if (s.size() != 2)
            throwError("Invalid dimension specified '" + dim + "'.  Need "
                "<from dimension>=><to dimension>.  See documentation for "
                "details.");
        // Allow new '=>' syntax
        if (s[1][0] == '>')
            s[1].erase(s[1].begin());

        Utils::trim(s[0]);
        Utils::trim(s[1]);
        if (s[0] == s[1])
            throwError("Can't ferry dimension '" + s[0] + "' to itself.");
        if (Utils::contains(toNames, s[1]))
            throwError("Can't ferry two source dimensions to the same "
                "destination dimension.");
        toNames.push_back(s[1]);
        m_dims.emplace_back(s[0], s[1]);
    }
}


void FerryFilter::addDimensions(PointLayoutPtr layout)
{
    for (auto& info : m_dims)
    {
        const Dimension::Id fromId = layout->findDim(info.m_fromName);
        // Dimensions being created with the "=>Dim" syntax won't
        // be in the layout, so we have to assign a default type.
        Dimension::Type fromType = layout->dimType(fromId);
        if (fromType == Dimension::Type::None)
            fromType = Dimension::Type::Double;

        info.m_toId = layout->registerOrAssignDim(info.m_toName, fromType);
    }
}


void FerryFilter::prepared(PointTableRef table)
{
    for (auto& info : m_dims)
    {
        info.m_fromId = table.layout()->findDim(info.m_fromName);
        if (info.m_fromId == Dimension::Id::Unknown && info.m_fromName.size())
            throwError("Can't ferry dimension '" + info.m_fromName + "'. "
                "Dimension doesn't exist.");
    }
}


bool FerryFilter::processOne(PointRef& point)
{
    for (const auto& info : m_dims)
    {
        if (info.m_fromId != Dimension::Id::Unknown)
        {
            double v = point.getFieldAs<double>(info.m_fromId);
            point.setField(info.m_toId, v);
        }
    }
    return true;
}


void FerryFilter::filter(PointView& view)
{
    PointRef point(view, 0);
    for (PointId id = 0; id < view.size(); ++id)
    {
        point.setPointId(id);
        processOne(point);
    }
}

} // namespace pdal

