#include "rays/ruby/point.h"


#include "defs.h"


RUCY_DEFINE_VALUE_OR_ARRAY_FROM_TO(Rays::Point)

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

#define CHECK RUCY_CHECK_OBJ(Rays::Point, self)


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

static
VALUE initialize(VALUE self)
{
	CHECK;
	check_arg_count(__FILE__, __LINE__, "Point#initialize", argc, 0, 1, 2, 3);

	if (argc >= 1)
		*THIS = to<Rays::Point>(argc, argv);

	return self;
}

static
VALUE initialize_copy(VALUE self, VALUE obj)
{
	CHECK;
	*THIS = to<Rays::Point&>(obj);
	return self;
}

static
VALUE move_to(VALUE self)
{
	CHECK;
	check_arg_count(__FILE__, __LINE__, "Point#move_to", argc, 1, 2, 3);

	if (argv[0].is_kind_of(Rays::point_class()))
		THIS->move_to(to<Rays::Point&>(argv[0]));
	else
	{
		const Rays::Point& p = *THIS;
		coord x = (argc >= 1 && argv[0]) ? to<coord>(argv[0]) : p.x;
		coord y = (argc >= 2 && argv[1]) ? to<coord>(argv[1]) : p.y;
		coord z = (argc >= 3 && argv[2]) ? to<coord>(argv[2]) : p.z;
		THIS->move_to(x, y, z);
	}

	return self;
}

static
VALUE move_by(VALUE self)
{
	CHECK;
	check_arg_count(__FILE__, __LINE__, "Point#move_by", argc, 1, 2, 3);

	if (argv[0].is_kind_of(Rays::point_class()))
		THIS->move_by(to<Rays::Point&>(argv[0]));
	else
	{
		coord x = (argc >= 1 && argv[0]) ? to<coord>(argv[0]) : 0;
		coord y = (argc >= 2 && argv[1]) ? to<coord>(argv[1]) : 0;
		coord z = (argc >= 3 && argv[2]) ? to<coord>(argv[2]) : 0;
		THIS->move_by(x, y, z);
	}

	return self;
}

static
VALUE rotate(VALUE self, VALUE degree)
{
	CHECK;
	Rays::Point p = *THIS;
	p.rotate(to<float>(degree));
	return value(p);
}

static
VALUE rotate_self(VALUE self, VALUE degree)
{
	CHECK;
	THIS->rotate(to<float>(degree));
}

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

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

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

static
VALUE set_x(VALUE self, VALUE x)
{
	CHECK;
	THIS->x = to<coord>(x);
	return x;
}

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

static
VALUE set_y(VALUE self, VALUE y)
{
	CHECK;
	THIS->y = to<coord>(y);
	return y;
}

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

static
VALUE set_z(VALUE self, VALUE z)
{
	CHECK;
	THIS->z = to<coord>(z);
	return z;
}

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

static
VALUE negate(VALUE self)
{
	CHECK;
	return value(-*THIS);
}

static
VALUE add(VALUE self)
{
	CHECK;
	if (argc == 1 && argv->is_num())
		return value(*THIS + to<coord>(*argv));
	else
		return value(*THIS + to<Rays::Point>(argc, argv));
}

static
VALUE sub(VALUE self)
{
	CHECK;
	if (argc == 1 && argv->is_num())
		return value(*THIS - to<coord>(*argv));
	else
		return value(*THIS - to<Rays::Point>(argc, argv));
}

static
VALUE mult(VALUE self)
{
	CHECK;
	if (argc == 1 && argv->is_num())
		return value(*THIS * to<coord>(*argv));
	else
		return value(*THIS * to<Rays::Point>(argc, argv));
}

static
VALUE div(VALUE self)
{
	CHECK;
	if (argc == 1 && argv->is_num())
		return value(*THIS / to<coord>(*argv));
	else
		return value(*THIS / to<Rays::Point>(argc, argv));
}

static
VALUE set_at(VALUE self, VALUE index, VALUE value)
{
	CHECK;

	int i = index.as_i();
	if (i < 0 || 2 < i)
		index_error(__FILE__, __LINE__);

	(*THIS)[i] = to<coord>(value);
	return value;
}

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

	int i = index.as_i();
	if (i < 0 || 2 < i)
		index_error(__FILE__, __LINE__);

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

static
VALUE dot(VALUE self, VALUE p1, VALUE p2)
{
	return value(Rays::dot(to<Rays::Point>(p1), to<Rays::Point>(p2)));
}

static
VALUE cross(VALUE self, VALUE p1, VALUE p2)
{
	return value(Rays::cross(to<Rays::Point>(p1), to<Rays::Point>(p2)));
}


static Class cPoint;

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

	cPoint = rb_define_class_under(mRays, "Point", rb_cObject);
	rb_define_alloc_func(cPoint, alloc);
	rb_define_private_method(cPoint, "initialize", RUBY_METHOD_FUNC(initialize), -1);
	rb_define_private_method(cPoint, "initialize_copy", RUBY_METHOD_FUNC(initialize_copy), 1);
	cPoint.define_method("move_to!", move_to);
	cPoint.define_method("move_by!", move_by);
	rb_define_method(cPoint, "rotate", RUBY_METHOD_FUNC(rotate), 1);
	cPoint.define_method("rotate!", rotate_self);
	rb_define_method(cPoint, "length", RUBY_METHOD_FUNC(length), 0);
	rb_define_method(cPoint, "normalize", RUBY_METHOD_FUNC(normalize), 0);
	rb_define_method(cPoint, "normal", RUBY_METHOD_FUNC(normal), 0);
	rb_define_method(cPoint, "x=", RUBY_METHOD_FUNC(set_x), 1);
	rb_define_method(cPoint, "x", RUBY_METHOD_FUNC(get_x), 0);
	rb_define_method(cPoint, "y=", RUBY_METHOD_FUNC(set_y), 1);
	rb_define_method(cPoint, "y", RUBY_METHOD_FUNC(get_y), 0);
	rb_define_method(cPoint, "z=", RUBY_METHOD_FUNC(set_z), 1);
	rb_define_method(cPoint, "z", RUBY_METHOD_FUNC(get_z), 0);
	cPoint.define_method("-@", negate);
	cPoint.define_method("+", add);
	cPoint.define_method("-", sub);
	cPoint.define_method("*", mult);
	cPoint.define_method("/", div);
	cPoint.define_method("[]=", set_at);
	cPoint.define_method("[]",  get_at);
	rb_define_module_function(cPoint, "dot", RUBY_METHOD_FUNC(dot), 2);
	rb_define_module_function(cPoint, "cross", RUBY_METHOD_FUNC(cross), 2);
}


namespace Rucy
{


	template <> Rays::Point
	value_to<Rays::Point> (int argc, const Value* argv, bool convert)
	{
		if (argc == 1 && argv->is_array())
		{
			argc = argv->size();
			argv = argv->as_array();
		}

		assert(argc == 0 || (argc > 0 && argv));

		if (convert)
		{
			if (argc == 0)
				return Rays::Point();
			else if (argv->is_num())
			{
				switch (argc)
				{
					#define V(i) to<coord>(argv[i])
					case 1: return Rays::Point(V(0));
					case 2: return Rays::Point(V(0), V(1));
					case 3: return Rays::Point(V(0), V(1), V(2));
					#undef V
					default: argument_error(__FILE__, __LINE__);
				}
			}
		}

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

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


}// Rucy


namespace Rays
{


	Class
	point_class ()
	{
		return cPoint;
	}


}// Rays