#include "rays/ruby/polyline.h"


#include <vector>
#include "rays/ruby/point.h"
#include "rays/ruby/bounds.h"
#include "rays/ruby/polygon.h"
#include "defs.h"


RUCY_DEFINE_VALUE_OR_ARRAY_FROM_TO(Rays::Polyline)

#define THIS  to<Rays::Polyline*>(self)

#define CHECK RUCY_CHECK_OBJECT(Rays::Polyline, self)


static
VALUE alloc(VALUE klass)
{
	return new_type<Rays::Polyline>(klass);
}

static
VALUE setup(VALUE self, VALUE points, VALUE loop)
{
	CHECK;

	std::vector<Rays::Point> array;
	get_line_args(&array, points.size(), points.as_array());
	*THIS = Rays::Polyline(&array[0], array.size(), loop);
}

static
VALUE expand(VALUE self)
{
	CHECK;
	check_arg_count(__FILE__, __LINE__, "Polyline#expand", argc, 1, 2, 3, 4);

	coord width         =             to<coord>         (argv[0]);
	Rays::CapType cap   = argc >= 2 ? to<Rays::CapType> (argv[1]) : Rays::CAP_DEFAULT;
	Rays::JoinType join = argc >= 3 ? to<Rays::JoinType>(argv[2]) : Rays::JOIN_DEFAULT;
	coord ml            = argc >= 4 ? to<coord>         (argv[3]) : Rays::JOIN_DEFAULT_MITER_LIMIT;

	Rays::Polygon polygon;
	THIS->expand(&polygon, width, cap, join, ml);
	return value(polygon);
}

static
VALUE bounds(VALUE self)
{
	CHECK;
	return value(THIS->bounds());
}

static
VALUE loop(VALUE self)
{
	CHECK;
	return value(THIS->loop());
}

static
VALUE size(VALUE self)
{
	CHECK;
	return value(THIS->size());
}

static
VALUE empty(VALUE self)
{
	CHECK;
	return value(THIS->empty());
}

static
VALUE get_at(VALUE self, VALUE index)
{
	CHECK;

	int size = (int) THIS->size();
	int i    = to<int>(index);
	if (i < 0) i += size;

	if (i < 0 || size <= i)
		index_error(__FILE__, __LINE__);

	return value((*THIS)[i]);
}

static
VALUE each(VALUE self)
{
	CHECK;

	Value ret = Qnil;
	for (const auto& point : *THIS)
		ret = rb_yield(value(point));
	return ret;
}


static Class cPolyline;

void
Init_polyline ()
{
	Module mRays = rb_define_module("Rays");

	cPolyline = rb_define_class_under(mRays, "Polyline", rb_cObject);
	rb_define_alloc_func(cPolyline, alloc);
	rb_define_private_method(cPolyline, "setup", RUBY_METHOD_FUNC(setup), 2);
	rb_define_method(cPolyline, "expand", RUBY_METHOD_FUNC(expand), -1);
	rb_define_method(cPolyline, "bounds", RUBY_METHOD_FUNC(bounds), 0);
	cPolyline.define_method("loop?", loop);
	rb_define_method(cPolyline, "size", RUBY_METHOD_FUNC(size), 0);
	cPolyline.define_method("empty?", empty);
	cPolyline.define_method("[]", get_at);
	rb_define_method(cPolyline, "each", RUBY_METHOD_FUNC(each), 0);
}


namespace Rucy
{


	template <> Rays::Polyline
	value_to<Rays::Polyline> (int argc, const Value* argv, bool convert)
	{
		assert(argc == 0 || (argc > 0 && argv));

		if (convert)
		{
			if (argc <= 0)
				return Rays::Polyline();
			else if (argv->is_num() || argv->is_array())
			{
				std::vector<Rays::Point> points;
				get_line_args(&points, argc, argv);
				return Rays::Polyline(&points[0], points.size());
			}
		}

		if (argc != 1)
			argument_error(__FILE__, __LINE__);

		return value_to<Rays::Polyline&>(*argv, convert);
	}


}// Rucy


namespace Rays
{


	Class
	polyline_class ()
	{
		return cPolyline;
	}


}// Rays