#ifndef SDLPP_HPP_GEOMETRY_LINE
#define SDLPP_HPP_GEOMETRY_LINE

#include "sdlpp_common.hpp"
#include "sdlpp_vector.hpp"
#include "sdlpp_line.hpp"
#include <algorithm>

namespace SDLPP {
template<typename T>
Vec2D<T> pointProjectionOnLine( const Vec2D<T> &point, const Line<T> &line ) {
    /* from here -
     * https://stackoverflow.com/questions/849211/shortest-distance-between-a-point-and-a-line-segment
     */
    auto length_squared = line.lengthSquared();
    if ( length_squared == 0.0 )
        return point;
    auto t =
        std::max( 0.0, std::min( 1.0, ( ( point - line.getStart() ) *
                                        ( line.getEnd() - line.getStart() ) ) /
                                          length_squared ) );
    return line.getStart() + t * ( line.getEnd() - line.getStart() );
}
template<typename T>
double pointLineDistance( const Vec2D<T> &point, const Line<T> &line ) {
    return vecDistance( point, pointProjectionOnLine( point, line ) );
}
} // namespace SDLPP

#endif