#include "svg.h"
void
svg_begin(double width, double height) {
    std::cout << "<?xml version='1.0' encoding='UTF-8'?>\n";
    std::cout << "<svg ";
    std::cout << "width='" << width << "' ";
    std::cout << "height='" << height << "' ";
    std::cout << "viewBox='0 0 " << width << " " << height << "' ";
    std::cout << "xmlns='http://www.w3.org/2000/svg'>\n";
}

void
svg_end() {
    std::cout << "</svg>\n";
}
void
svg_text(double left, double baseline, std::string text) {
    std::cout << "<text x='" << left << "' y='" << baseline << "'>" << text << "</text>";
}
void
svg_rect(double x,double y,double width,double height,std::string stroke = "red",std::string fill= "black"){
    std::cout << "<rect x='"<<x<<"' y='"<<y<<"' width='"<<width<<"' height='"<<height<<"' stroke='"<<stroke<<"' fill='"<<fill<<"' />";}
void
show_histogram_svg(const std::vector<size_t>& bins) {
    const auto IMAGE_WIDTH = 400;
    const auto IMAGE_HEIGHT = 300;
    const auto TEXT_LEFT = 20;
    const auto TEXT_BASELINE = 20;
    const auto TEXT_WIDTH = 50;
    const auto BIN_HEIGHT = 30;
    const auto BLOCK_WIDTH = 10;
    const auto COLOUR_1 = "green";
    const auto COLOUR_2 = "blue";
    svg_begin(400, 300);

    double top = 0;
    for (size_t bin : bins)
        {
        const double bin_width = BLOCK_WIDTH * bin;
        svg_text(TEXT_LEFT, top + TEXT_BASELINE, std::to_string(bin));
        svg_rect(TEXT_WIDTH, top, bin_width, BIN_HEIGHT,COLOUR_1,COLOUR_2);
        top += BIN_HEIGHT;
    }

    svg_end();
}