/**********************************************************************
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.osgeo.org
 *
 * Copyright (C) 2001-2002 Vivid Solutions Inc.
 * Copyright (C) 2005 Refractions Research Inc.
 *
 * This is free software; you can redistribute and/or modify it under
 * the terms of the GNU Lesser General Public Licence as published
 * by the Free Software Foundation.
 * See the COPYING file for more information.
 *
 **********************************************************************
 *
 * Last port: geomgraph/Depth.java rev. 1.4 (JTS-1.10)
 *
 **********************************************************************/

#include <sstream>
#include <string>

#include <geos/geomgraph/Depth.h>
#include <geos/geomgraph/Label.h>
#include <geos/geom/Location.h>

using geos::geom::Location;

namespace geos {
namespace geomgraph { // geos.geomgraph

/**
 * Normalize the depths for each geometry, if they are non-null.
 * A normalized depth
 * has depth values in the set { 0, 1 }.
 * Normalizing the depths
 * involves reducing the depths by the same amount so that at least
 * one of them is 0.  If the remaining value is > 0, it is set to 1.
 */
void
Depth::normalize()
{
    for(uint8_t i = 0; i < 2; i++) {
        if(!isNull(i)) {
            int minDepth = depth[i][1];
            if(depth[i][2] < minDepth) {
                minDepth = depth[i][2];
            }
            if(minDepth < 0) {
                minDepth = 0;
            }
            for(int j = 1; j < 3; j++) {
                int newValue = 0;
                if(depth[i][j] > minDepth) {
                    newValue = 1;
                }
                depth[i][j] = newValue;
            }
        }
    }
}

void
Depth::add(const Label& lbl)
{
    for(uint8_t i = 0; i < 2; i++) {
        for(uint8_t j = 1; j < 3; j++) {
            Location loc = lbl.getLocation(i, j);
            if(loc == Location::EXTERIOR || loc == Location::INTERIOR) {
                // initialize depth if it is null, otherwise
                // add this location value
                if(isNull(i, j)) {
                    depth[i][j] = depthAtLocation(loc);
                }
                else {
                    depth[i][j] += depthAtLocation(loc);
                }
            }
        }
    }
}

std::string
Depth::toString() const
{
    std::ostringstream s;
    s << "A:" << depth[0][1] << "," << depth[0][2] << " ";
    s << "B:" << depth[1][1] << "," << depth[1][2] << "]";
    return s.str();
}


} // namespace geos.geomgraph
} // namespace geos
