#include "SVGExport.hpp"
#include "SVG.hpp"
#include <iostream>
#include <cstdio>
#define COORD(x) ((float)unscale(x)*10)

namespace Slic3r {

SVGExport::SVGExport(TriangleMesh &t, float layerheight, float firstlayerheight)
    :t(&t), sliced(false)
{
    if(layerheight>0){
        for(float f=firstlayerheight;f<=t.stl.stats.max.z;f+=layerheight){
            heights.push_back(f);
        }
    
        TriangleMeshSlicer(&t).slice(heights,&layers);
        sliced=true;
    }
    
}

//<g id="layer0" slic3r:z="0.1"> <path...> <path...> </g>

void SVGExport::writeSVG(const std::string &outputfile){
    if(sliced){
        FILE* f = fopen(outputfile.c_str(), "w");
        fprintf(f,
        "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\"?>\n"
        "<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.0//EN\" \"http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd\">\n"
        "<svg width=\"%f\" height=\"%f\" xmlns=\"http://www.w3.org/2000/svg\" xmlns:svg=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\" xmlns:slic3r=\"http://slic3r.org/namespaces/slic3r\">\n"
        "<!-- Generated using Slic3r %s http://slic3r.org/ -->\n"
        ,t->stl.stats.max.x*10,t->stl.stats.max.y*10,SLIC3R_VERSION);
        for (int i=0;i<heights.size();i++){
            fprintf(f,"\t<g id=\"layer%d\" slic3r:z=\"%0.4f\">\n",i,heights[i]);
            for (ExPolygons::const_iterator it = layers[i].begin(); it != layers[i].end(); ++it){
                std::string pd;
                Polygons pp = *it;
                for (Polygons::const_iterator mp = pp.begin(); mp != pp.end(); ++mp) {
                    std::ostringstream d;
                    d << "M ";
                    for (Points::const_iterator p = mp->points.begin(); p != mp->points.end(); ++p) {
                        d << COORD(p->x) << " ";
                        d << COORD(p->y) << " ";
                    }
                    d << "z";
                    pd += d.str() + " ";
                }
                fprintf(f,"\t\t<path d=\"%s\" style=\"fill: %s; stroke: %s; stroke-width: %s; fill-type: evenodd\" />\n",
                    pd.c_str(),"white","black","0"
                );
            }
            fprintf(f,"\t</g>\n");
        }
        fprintf(f,"</svg>\n");
    }
}

}