/******************************************************************************
* Copyright (c) 2016, Hobu Inc. (info@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. 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.
****************************************************************************/

#include <pdal/Scaling.hpp>

namespace pdal
{

void Scaling::addArgs(ProgramArgs& args)
{
    m_xOffArg = &args.add("offset_x", "X offset", m_xXform.m_offset);
    m_yOffArg = &args.add("offset_y", "Y offset", m_yXform.m_offset);
    m_zOffArg = &args.add("offset_z", "Z offset", m_zXform.m_offset);

    m_xScaleArg = &args.add("scale_x", "X scale", m_xXform.m_scale,
        XForm::XFormComponent(1.0));
    m_yScaleArg = &args.add("scale_y", "Y scale", m_yXform.m_scale,
        XForm::XFormComponent(1.0));
    m_zScaleArg = &args.add("scale_z", "Z scale", m_zXform.m_scale,
        XForm::XFormComponent(1.0));
}


void Scaling::setAutoXForm(const PointViewSet& pvSet)
{
    bool xmod = m_xXform.m_offset.m_auto || m_xXform.m_scale.m_auto;
    bool ymod = m_yXform.m_offset.m_auto || m_yXform.m_scale.m_auto;
    bool zmod = m_zXform.m_offset.m_auto || m_zXform.m_scale.m_auto;
    if (!xmod && !ymod && !zmod)
        return;

    double xmin = (std::numeric_limits<double>::max)();
    double xmax = (std::numeric_limits<double>::lowest)();
    double ymin = (std::numeric_limits<double>::max)();
    double ymax = (std::numeric_limits<double>::lowest)();
    double zmin = (std::numeric_limits<double>::max)();
    double zmax = (std::numeric_limits<double>::lowest)();

    for (const PointViewPtr& view : pvSet)
    {
        if (xmod)
            for (PointId idx = 0; idx < view->size(); idx++)
            {
                double x = view->getFieldAs<double>(Dimension::Id::X, idx);
                xmin = (std::min)(x, xmin);
                xmax = (std::max)(x, xmax);
            }
        if (ymod)
            for (PointId idx = 0; idx < view->size(); idx++)
            {
                double y = view->getFieldAs<double>(Dimension::Id::Y, idx);
                ymin = (std::min)(y, ymin);
                ymax = (std::max)(y, ymax);
            }
        if (zmod)
            for (PointId idx = 0; idx < view->size(); idx++)
            {
                double z = view->getFieldAs<double>(Dimension::Id::Z, idx);
                zmin = (std::min)(z, zmin);
                zmax = (std::max)(z, zmax);
            }
    }

    if (m_xXform.m_offset.m_auto)
    {
        m_xXform.m_offset.m_val = xmin;
        xmax -= xmin;
    }
    if (m_yXform.m_offset.m_auto)
    {
        m_yXform.m_offset.m_val = ymin;
        ymax -= ymin;
    }
    if (m_zXform.m_offset.m_auto)
    {
        m_zXform.m_offset.m_val = zmin;
        zmax -= zmin;
    }
    if (m_xXform.m_scale.m_auto)
        m_xXform.m_scale.m_val = xmax / (std::numeric_limits<int>::max)();
    if (m_yXform.m_scale.m_auto)
        m_yXform.m_scale.m_val = ymax / (std::numeric_limits<int>::max)();
    if (m_zXform.m_scale.m_auto)
        m_zXform.m_scale.m_val = zmax / (std::numeric_limits<int>::max)();
}


} // namespace pdal
