#include "Line.hpp"
#include <algorithm>

namespace Slic3r {

void
Line::scale(double factor)
{
    this->a.scale(factor);
    this->b.scale(factor);
}

void
Line::translate(double x, double y)
{
    this->a.translate(x, y);
    this->b.translate(x, y);
}

void
Line::rotate(double angle, Point* center)
{
    this->a.rotate(angle, center);
    this->b.rotate(angle, center);
}

void
Line::reverse()
{
    std::swap(this->a, this->b);
}

double
Line::length() const
{
    return this->a.distance_to(&(this->b));
}

Point*
Line::midpoint() const
{
    return new Point ((this->a.x + this->b.x) / 2.0, (this->a.y + this->b.y) / 2.0);
}

void
Line::from_SV(SV* line_sv)
{
    AV* line_av = (AV*)SvRV(line_sv);
    this->a.from_SV_check(*av_fetch(line_av, 0, 0));
    this->b.from_SV_check(*av_fetch(line_av, 1, 0));
}

void
Line::from_SV_check(SV* line_sv)
{
    if (sv_isobject(line_sv) && (SvTYPE(SvRV(line_sv)) == SVt_PVMG)) {
        *this = *(Line*)SvIV((SV*)SvRV( line_sv ));
    } else {
        this->from_SV(line_sv);
    }
}

SV*
Line::to_AV() {
    AV* av = newAV();
    av_extend(av, 1);
    
    SV* sv = newSV(0);
    sv_setref_pv( sv, "Slic3r::Point::Ref", &(this->a) );
    av_store(av, 0, sv);
    
    sv = newSV(0);
    sv_setref_pv( sv, "Slic3r::Point::Ref", &(this->b) );
    av_store(av, 1, sv);
    
    return newRV_noinc((SV*)av);
}

SV*
Line::to_SV_ref() {
    SV* sv = newSV(0);
    sv_setref_pv( sv, "Slic3r::Line::Ref", this );
    return sv;
}

SV*
Line::to_SV_clone_ref() const {
    SV* sv = newSV(0);
    sv_setref_pv( sv, "Slic3r::Line", new Line(*this) );
    return sv;
}

SV*
Line::to_SV_pureperl() const {
    AV* av = newAV();
    av_extend(av, 1);
    av_store(av, 0, this->a.to_SV_pureperl());
    av_store(av, 1, this->b.to_SV_pureperl());
    return newRV_noinc((SV*)av);
}

// get the point at distance d along this line
Point*
Line::point_at(double d) const
{
    Point* p = new Point (this->a);
    double len = this->length();
    if (this->a.x != this->b.x) p->x = this->a.x + (this->b.x - this->a.x) * d / len;
    if (this->a.y != this->b.y) p->y = this->a.y + (this->b.y - this->a.y) * d / len;
    return p;
}

}
