// -*- c++ -*-
#pragma once
#ifndef __RUCY_EXTENSION_H__
#define __RUCY_EXTENSION_H__


#include <xot/ref.h>
#include <xot/string.h>
#include <rucy/rucy.h>
#include <rucy/value.h>
#include <rucy/exception.h>


#define RUCY_DECLARE_VALUE_FROM(native_class) \
	namespace Rucy \
	{ \
		Value value (const native_class& obj); \
		Value value (const native_class* obj); \
	}

#define RUCY_DECLARE_VALUE_TO(native_class) \
	namespace Rucy \
	{ \
		template <>       native_class* value_to<      native_class*> (Value value, bool); \
		template <> const native_class* value_to<const native_class*> (Value value, bool); \
		template <>       native_class& value_to<      native_class&> (Value value, bool convert); \
		template <> const native_class& value_to<const native_class&> (Value value, bool convert); \
	}

#define RUCY_DECLARE_ARRAY_TO(native_class) \
	namespace Rucy \
	{ \
		template <> native_class value_to<native_class> (Value value, bool convert); \
		template <> native_class value_to<native_class> (int argc, const Value* argv, bool convert); \
	}

#define RUCY_DECLARE_CONVERT_TO(native_type) \
	RUCY_DECLARE_ARRAY_TO(native_type)

#define RUCY_DECLARE_VALUE_OR_ARRAY_TO(native_class) \
	RUCY_DECLARE_VALUE_TO(native_class) \
	RUCY_DECLARE_ARRAY_TO(native_class)

#define RUCY_DECLARE_WRAPPER_VALUE_FROM(native_class) \
	namespace Rucy \
	{ \
		Value value (native_class* obj); \
		Value value (native_class* obj, Value klass); \
	}

#define RUCY_DECLARE_WRAPPER_VALUE_TO(native_class) \
	namespace Rucy \
	{ \
		template <>       native_class* value_to<      native_class*> (Value value, bool convert); \
		template <> const native_class* value_to<const native_class*> (Value value, bool convert); \
	}

#define RUCY_DEFINE_VALUE_FROM(native_class) \
	namespace Rucy \
	{ \
		Value \
		value (const native_class& obj) \
		{ \
			return new_type(get_ruby_class<native_class>(), new native_class(obj)); \
		} \
		Value \
		value (const native_class* obj) \
		{ \
			return obj ? value(*obj) : nil(); \
		} \
	}

#define RUCY_DEFINE_VALUE_TO(native_class) \
	namespace Rucy \
	{ \
		template <> native_class* \
		value_to<native_class*> (Value value, bool) \
		{ \
			return get_type_ptr<native_class>(value, get_ruby_class<native_class>()); \
		} \
		template <> const native_class* \
		value_to<const native_class*> (Value value, bool convert) \
		{ \
			return (const native_class*) value_to<native_class*>(value, convert); \
		} \
		template <> native_class& \
		value_to<native_class&> (Value value, bool convert) \
		{ \
			native_class* obj = value_to<native_class*>(value, convert); \
			if (!obj) \
				rucy_error(__FILE__, __LINE__, "failed to convert from/to %s.", #native_class); \
			return *obj; \
		} \
		template <> const native_class& \
		value_to<const native_class&> (Value value, bool convert) \
		{ \
			return (const native_class&) value_to<native_class&>(value, convert); \
		} \
	}

#define RUCY_DEFINE_ARRAY_TO(native_class) \
	namespace Rucy \
	{ \
		template <> native_class \
		value_to<native_class> (Value value, bool convert) \
		{ \
			if (value.is_array()) \
				return value_to<native_class>(value.size(), value.as_array(), convert); \
			else \
				return value_to<native_class>(1, &value, convert); \
		} \
	}

#define RUCY_DEFINE_CONVERT_TO(native_type) \
	RUCY_DEFINE_ARRAY_TO(native_type)

#define RUCY_DEFINE_VALUE_OR_ARRAY_TO(native_class) \
	RUCY_DEFINE_VALUE_TO(native_class) \
	RUCY_DEFINE_ARRAY_TO(native_class)

#define RUCY_DEFINE_WRAPPER_VALUE_FROM(native_class) \
	namespace Rucy \
	{ \
		Value \
		value (native_class* obj) \
		{ \
			return value(obj, get_ruby_class<native_class>()); \
		} \
		Value \
		value (native_class* obj, Value klass) \
		{ \
			if (!obj) return nil(); \
			GlobalValue* wrapped = (GlobalValue*) obj->rucy_wrapper_value(); \
			if (!wrapped) return new_ref(klass, obj); \
			if (wrapped->is_nil()) *wrapped = new_wrapper(klass, obj); \
			return *wrapped; \
		} \
	}

#define RUCY_DEFINE_WRAPPER_VALUE_TO(native_class) \
	namespace Rucy \
	{ \
		template <> native_class* \
		value_to<native_class*> (Value value, bool) \
		{ \
			return get_type_ptr<native_class>(value, get_ruby_class<native_class>()); \
		} \
		template <> const native_class* \
		value_to<const native_class*> (Value value, bool convert) \
		{ \
			return (const native_class*) value_to<native_class*>(value, convert); \
		} \
	}

#define RUCY_DECLARE_VALUE_FROM_TO(native_class) \
	RUCY_DECLARE_VALUE_FROM(native_class) \
	RUCY_DECLARE_VALUE_TO(native_class)

#define RUCY_DEFINE_VALUE_FROM_TO(native_class) \
	RUCY_DEFINE_VALUE_FROM(native_class) \
	RUCY_DEFINE_VALUE_TO(native_class)

#define RUCY_VALUE_FROM_TO(native_class) \
	RUCY_DECLARE_VALUE_FROM_TO(native_class) \
	RUCY_DEFINE_VALUE_FROM_TO(native_class)

#define RUCY_DECLARE_VALUE_OR_ARRAY_FROM_TO(native_class) \
	RUCY_DECLARE_VALUE_FROM(native_class) \
	RUCY_DECLARE_VALUE_OR_ARRAY_TO(native_class)

#define RUCY_DEFINE_VALUE_OR_ARRAY_FROM_TO(native_class) \
	RUCY_DEFINE_VALUE_FROM(native_class) \
	RUCY_DEFINE_VALUE_OR_ARRAY_TO(native_class)

#define RUCY_VALUE_OR_ARRAY_FROM_TO(native_class) \
	RUCY_DECLARE_VALUE_OR_ARRAY_FROM_TO(native_class) \
	RUCY_DEFINE_VALUE_OR_ARRAY_FROM_TO(native_class)

#define RUCY_DECLARE_WRAPPER_VALUE_FROM_TO(native_class) \
	RUCY_DECLARE_WRAPPER_VALUE_FROM(native_class) \
	RUCY_DECLARE_WRAPPER_VALUE_TO(native_class)

#define RUCY_DEFINE_WRAPPER_VALUE_FROM_TO(native_class) \
	RUCY_DEFINE_WRAPPER_VALUE_FROM(native_class) \
	RUCY_DEFINE_WRAPPER_VALUE_TO(native_class)

#define RUCY_WRAPPER_VALUE_FROM_TO(native_class) \
	RUCY_DECLARE_WRAPPER_VALUE_FROM_TO(native_class) \
	RUCY_DEFINE_WRAPPER_VALUE_FROM_TO(native_class)


#define RUCY_TRY \
	Rucy::RubyValue RUCY__rubyexception__ = Rucy::nil(); \
	int RUCY__rubyjumptag__ = 0; \
	 \
	goto RUCY__ruby_try_start__; \
	 \
	RUCY__ruby_jump_tag__: \
	if (RUCY__rubyjumptag__) rb_jump_tag(RUCY__rubyjumptag__); \
	RUCY_GOTO_RAISE(rb_exc_new2(Rucy::native_error_class(), "Bad jump tag.")); \
	 \
	RUCY__ruby_raise_exception__: \
	rb_exc_raise(RUCY__rubyexception__); \
	 \
	RUCY__ruby_try_start__: \
	try \
	{

#define RUCY_CATCH \
	} \
	catch (const Rucy::RubyJumpTag& e) \
	{ \
		RUCY__rubyjumptag__ = e.tag; \
		goto RUCY__ruby_jump_tag__; \
	} \
	catch (const Rucy::RubyException& e) \
	{ \
		RUCY_GOTO_RAISE(e.value()); \
	} \
	catch (const std::invalid_argument& e) \
	{ \
		RUCY_GOTO_RAISE(rb_exc_new2(rb_eArgError, e.what())); \
	} \
	catch (const std::exception& e) \
	{ \
		Xot::String text = e.what(), type = typeid(e).name(); \
		if (!type.empty()) \
		{ \
			if (!text.empty()) text += " "; \
			text += "[" + type + "]"; \
		} \
		RUCY_GOTO_RAISE(rb_exc_new2(Rucy::native_error_class(), text.c_str())); \
	} \
	catch (const std::string& s) \
	{ \
		RUCY_GOTO_RAISE(rb_exc_new2(Rucy::native_error_class(), s.c_str())); \
	} \
	catch (const char* s) \
	{ \
		RUCY_GOTO_RAISE(rb_exc_new2(Rucy::native_error_class(), s)); \
	} \
	catch (...) \
	{ \
		RUCY_GOTO_RAISE(rb_exc_new2( \
			Rucy::native_error_class(), "Unknown C++ exception was thrown.")); \
	}

#define RUCY_GOTO_RAISE(exception) \
	RUCY__rubyexception__ = (exception); \
	goto RUCY__ruby_raise_exception__

#define RUCY_RAISE(ruby_error_class, message) \
	rb_exc_raise(rb_exc_new2(ruby_error_class, message))


#define RUCY_DEF_ALLOC(name, klass) \
	Rucy::RubyValue name (Rucy::Value klass) \
	{ \
		RUCY_TRY

#define RUCY_DEFN(name) \
	Rucy::RubyValue name (int argc, const Rucy::Value* argv, Rucy::Value self) \
	{ \
		RUCY_TRY

%	NTIMES.each do |n|
#define RUCY_DEF<%= n %>(name<%= params(n) {|i| ", v#{i}"} %>) \
	Rucy::RubyValue name (Rucy::Value self<%= params(n) {|i| ", Rucy::Value v#{i}"} %>) \
	{ \
		RUCY_TRY
%	end

#define RUCY_DEF_END \
		RUCY_CATCH \
		return Rucy::nil(); \
	}


#define RUCY_CHECK_OBJ(native_class, obj) \
	do \
	{ \
		native_class* p = \
			Rucy::get_type_ptr<native_class>(obj, Rucy::get_ruby_class<native_class>()); \
		if (!p) Rucy::invalid_object_error(__FILE__, __LINE__); \
	} \
	while(0)

#define RUCY_CHECK_OBJECT(native_class, obj) \
	do \
	{ \
		native_class* p = \
			Rucy::get_type_ptr<native_class>(obj, Rucy::get_ruby_class<native_class>()); \
		if (!p || !*p) Rucy::invalid_object_error(__FILE__, __LINE__); \
	} \
	while(0)

#define RUCY_CALL_SUPER(obj, fun) \
	((obj)->rucy_disable_override() ? (obj)->fun : (obj)->fun)


namespace Rucy
{


	void check_class (Value obj, Value klass);

	void check_arg_count (
		const char* file, int line,
		const char* method, int nargs, int nargs_expected_n0,
		int n1 = -1, int n2 = -1, int n3 = -1, int n4 = -1, int n5 = -1,
		int n6 = -1, int n7 = -1, int n8 = -1, int n9 = -1, int n10 = -1);


	template <typename T> Class get_ruby_class ();


	template <typename RefCountableT>
	class ClassWrapper : public RefCountableT
	{

		typedef ClassWrapper  This;

		typedef RefCountableT RucyWrapped;

		public:

			GlobalValue value;

			ClassWrapper ()
			:	value(nil(), true), overridable(true)
			{
			}

			void retain (intptr_t by_ruby) const override
			{
				if (!by_ruby) value.disable_gc();
				RucyWrapped::retain();
			}

			void release (intptr_t by_ruby) const override
			{
				if (!by_ruby) value.enable_gc();
				RucyWrapped::release();
			}

			virtual bool is_overridable () const
			{
				if (value.is_nil())
					return false;

				if (!overridable)
				{
					overridable = true;
					return false;
				}

				return true;
			}

			void* rucy_wrapper_value () const override
			{
				return (void*) &value;
			}

			bool rucy_disable_override () const override
			{
				overridable = false;
				return true;
			}

		private:

			mutable bool overridable;

	};// ClassWrapper


	template <typename T> inline void delete_type (void* p)
	{
		delete (T*) p;
	}

	template <typename T> inline void release_ref (void* p)
	{
		if (p) ((T*) p)->release();
	}

	template <typename T> inline void release_wrapper (void* p)
	{
		if (p) ((T*) p)->release(true);
	}


	template <typename T> inline Value new_type (
		Value klass, T* ptr,
		RUBY_DATA_FUNC mark = NULL,
		RUBY_DATA_FUNC free = delete_type<T>)
	{
		if (!ptr) return nil();
		return Data_Wrap_Struct(klass, mark, free, ptr);
	}

	template <typename T> inline Value new_type (
		Value klass,
		RUBY_DATA_FUNC mark = NULL,
		RUBY_DATA_FUNC free = delete_type<T>)
	{
		return new_type(klass, new T, mark, free);
	}

	template <typename T> inline Value new_ref (
		Value klass, T* ptr,
		RUBY_DATA_FUNC mark = NULL,
		RUBY_DATA_FUNC free = release_ref<T>)
	{
		if (ptr) ptr->retain();
		return new_type(klass, ptr, mark, free);
	}

	template <typename T> inline Value new_ref (
		Value klass,
		RUBY_DATA_FUNC mark = NULL,
		RUBY_DATA_FUNC free = release_ref<T>)
	{
		return new_ref(klass, new T, mark, free);
	}

	template <typename T> inline Value new_wrapper (
		Value klass, T* ptr,
		RUBY_DATA_FUNC mark = NULL,
		RUBY_DATA_FUNC free = release_wrapper<T>)
	{
		if (ptr) ptr->retain(true);
		return new_type(klass, ptr, mark, free);
	}

	template <typename T> inline Value new_wrapper (
		Value klass,
		RUBY_DATA_FUNC mark = NULL,
		RUBY_DATA_FUNC free = release_wrapper<T>)
	{
		return new_wrapper(klass, new T, mark, free);
	}


	template <typename T> inline T* get_type_ptr (Value obj, Value klass = nil())
	{
		if (!klass.is_nil()) check_class(obj, klass);
		T* p = NULL;
		Data_Get_Struct(obj.value(), T, p);
		return p;
	}


}// Rucy


#endif//EOH