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#pragma once
#include <string>
#include <string_view>
#include "graphviz_node.h"
#include "svg_element.h"
/**
* @brief The GraphvizEdge class represents a Graphviz edge according to the DOT
* language
*/
class GraphvizEdge {
public:
GraphvizEdge() = delete;
explicit GraphvizEdge(SVG::SVGElement &svg_g_element);
/// Add an SVG `rect` element to the edge's corresponding `g` element. The
/// `rect` is represes the bounding box of the edge.
void add_bbox();
/// Add an SVG `rect` element to the edge's corresponding `g` element. The
/// `rect` represents the outline bounding box of the edge. The outline
/// bounding box is the bounding box with penwidth taken into account.
void add_outline_bbox();
/// Add an SVG `rect` element representing the overlap between the outline
/// bounding box of the edge and the specified node, to the corresponding `g`
/// element. The outline bounding box is the bounding box with penwidth taken
/// into account.
void add_outline_overlap_bbox(const GraphvizNode &node, double tolerance = 0);
/// Return the edge arrowhead/arrowtail with the specified index. If there's
/// both an arrowhead and an arrowtail, the arrowtail is at index 0 and the
/// arrowhead is at index 1. If there's only one, it's at index 0. Throws an
/// exception if there's no arrow at the specified index.
SVG::SVGRect
arrowhead_outline_bbox(std::string_view dir,
std::string_view primitive_arrow_shape) const;
/// Return the outline bounding box of the edge arrowtail. The outline
/// bounding box is the bounding box with penwidth taken into account.
SVG::SVGRect
arrowtail_outline_bbox(std::string_view dir,
std::string_view primitive_arrow_shape) const;
/// Return the bounding box of the edge
SVG::SVGRect bbox() const;
/// Return the center of the edge's bounding box
SVG::SVGPoint center() const;
/// Return the edge's `color` attribute in RGB hex format if the opacity is
/// 100 % or in RGBA hex format otherwise.
std::string color() const;
/// Return the 'edgeop' according to the DOT language specification. Note that
/// this is not the same as the 'id' attribute of an edge.
std::string_view edgeop() const;
/// Return the edge's `fillcolor` attribute in RGB hex format if the opacity
/// is 100 % or in RGBA hex format otherwise.
std::string fillcolor() const;
/// Return the outline bounding box of the edge. The outline bounding box is
/// the bounding box with penwidth taken into account.
SVG::SVGRect outline_bbox() const;
/// Return the edge stem, i.e., the part of the edge that does not include any
/// arrowhead or arrowtail
SVG::SVGElement &stem() const;
/// Return the edge's `penwidth` attribute
double penwidth() const;
/// Return a non-mutable reference to the SVG `g` element corresponding to the
/// edge
const SVG::SVGElement &svg_g_element() const;
private:
/// The 'edgeop' according to the DOT language specification
std::string m_edgeop;
/// The SVG `g` element corresponding to the edge
SVG::SVGElement &m_svg_g_element;
};
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