#ifndef SEEN_SNAPPEDLINE_H

#define SEEN_SNAPPEDLINE_H

#include <vector>

#include <list>

#include "snapped-point.h"

namespace Inkscape

{

class SnappedLineSegment : public SnappedPoint

{

public:

SnappedLineSegment();

SnappedLineSegment(Geom::Point const &snapped_point, Geom::Coord const &snapped_distance, SnapSourceType const &source, long source_num, SnapTargetType const &target, Geom::Coord const &snapped_tolerance,bool const &always_snap, Geom::Point const &start_point_of_line, Geom::Point const &end_point_of_line);

~SnappedLineSegment();

Inkscape::SnappedPoint intersect(SnappedLineSegment const &line) const; //intersect with another SnappedLineSegment

Geom::LineSegment getLineSegment() const {return Geom::LineSegment(_start_point_of_line, _end_point_of_line);}

private:

Geom::Point _start_point_of_line;

Geom::Point _end_point_of_line;

};

class SnappedLine : public SnappedPoint

{

public:

SnappedLine();

SnappedLine(Geom::Point const &snapped_point, Geom::Coord const &snapped_distance, SnapSourceType const &source, long source_num, SnapTargetType const &target, Geom::Coord const &snapped_tolerance, bool const &always_snap, Geom::Point const &normal_to_line, Geom::Point const &point_on_line);

~SnappedLine();

Inkscape::SnappedPoint intersect(SnappedLine const &line) const; //intersect with another SnappedLine

// This line is described by this equation:

// a*x + b*y = c <-> nx*px + ny+py = c <-> n.p = c

Geom::Point getNormal() const {return _normal_to_line;} // n = (nx, ny)

Geom::Point getPointOnLine() const {return _point_on_line;} // p = (px, py)

Geom::Coord getConstTerm() const {return dot(_normal_to_line, _point_on_line);} // c = n.p = nx*px + ny*py;

Geom::Line getLine() const {return Geom::Line(_point_on_line, _point_on_line + Geom::rot90(_normal_to_line));}

private:

Geom::Point _normal_to_line;

Geom::Point _point_on_line;

};

}

bool getClosestSLS(std::list<Inkscape::SnappedLineSegment> const &list, Inkscape::SnappedLineSegment &result);

bool getClosestIntersectionSLS(std::list<Inkscape::SnappedLineSegment> const &list, Inkscape::SnappedPoint &result);

bool getClosestSL(std::list<Inkscape::SnappedLine> const &list, Inkscape::SnappedLine &result);

bool getClosestIntersectionSL(std::list<Inkscape::SnappedLine> const &list, Inkscape::SnappedPoint &result);

bool getClosestIntersectionSL(std::list<Inkscape::SnappedLine> const &list1, std::list<Inkscape::SnappedLine> const &list2, Inkscape::SnappedPoint &result);

#endif /* !SEEN_SNAPPEDLINE_H */