#pragma once

#include <functional>
#include <QString>
#include "data_types.h"
#include "validation.h"

namespace Inlet {
	template<typename... Types> struct SignatureImpl;
	template<> struct SignatureImpl<> {
	public:
		SignatureImpl() { }

		void execute(std::function<void(void)> unit) {
			unit();
		}
		void result() const { }

		void saveTo(int index, datas::IDataObject& object) { }
		void loadFrom(int index, datas::IDataObject& object) { }
	};
	template<typename Ret> struct SignatureImpl<Ret> {
	private:
		Ret _result;

	public:
		SignatureImpl() : _result(Ret()) { }

		Ret execute(std::function<Ret(void)> unit) {
			_result = unit();
			return _result;
		}

		Ret result() const {
			return _result;
		}

		void saveTo(int index, datas::IDataObject& object) {
			datas::dataSet<Ret>(object, u8"RetValue", _result);
		}
		void loadFrom(int index, datas::IDataObject& object) {
			_result = datas::dataGet<Ret>(object, u8"RetValue");
		}
	};
	template<typename Ret, typename First, typename... Args>
	struct SignatureImpl<Ret, First, Args...> : public SignatureImpl<Ret, Args...> {
	private:
		First _args_value;

	public:
		SignatureImpl() : SignatureImpl<Ret, Args...>(), _args_value(First()) { }
		SignatureImpl(First a0, Args... args) :SignatureImpl<Ret, Args...>(args...), _args_value(a0) { }

		First getArgs0() {
			return _args_value;
		}

		Ret execute(std::function<Ret(First, Args...)> unit) {
			auto unit_wrap = [&](Args... args) {
				return unit(_args_value, args...);
				};
			return SignatureImpl<Ret, Args...>::execute(unit_wrap);
		}


		void saveTo(int index, datas::IDataObject& object) {
			datas::dataSet<First>(object, QString(u8"Args_%1").arg(index), _args_value);
			SignatureImpl<Ret, Args...>::saveTo(index + 1, object);
		}
		void loadFrom(int index, datas::IDataObject& object) {
			_args_value = datas::dataGet<First>(object, QString(u8"Args_%1").arg(index));
			SignatureImpl<Ret, Args...>::loadFrom(index + 1, object);
		}
	};




	class IRunbase {
	public:
		virtual ~IRunbase() = default;

		virtual quint64 address() const = 0;
		virtual void run() = 0;

		virtual void saveTo(datas::IDataObject& object) = 0;
		virtual void loadFrom(datas::IDataObject& object) = 0;
	};

	template<typename Ret, typename... Args> using Callable = Ret(*)(Args...);

	template<void* addr, typename Ret, typename... Args> struct CmdsImpl : public IRunbase {
	private:
		Callable<Ret, Args...> _func = (Callable<Ret, Args...>)addr;
		SignatureImpl<Ret, Args...> _args_value;

		static CmdsImpl<addr, Ret, Args...>* _global_inst;

	public:
		CmdsImpl() : _args_value() { }
		CmdsImpl(Args... args) :_args_value(args...) { }

		static CmdsImpl<addr, Ret, Args...>* global() {
			if (!_global_inst) {
				_global_inst = new CmdsImpl<addr, Ret, Args...>();
			}
			return _global_inst;
		}

		Ret execute(Args... args) {
			_args_value = SignatureImpl<Ret, Args...>(args...);
			return _args_value.execute(_func);
		}

		Ret result() const {
			return _args_value.result();
		}

		// IRunbase
		quint64 address() const {
			return (quint64) addr;
		}
		void run() {
			_args_value.execute(_func);
		}
		virtual void saveTo(datas::IDataObject& object) {
			_args_value.saveTo(0, object);
		}
		virtual void loadFrom(datas::IDataObject& object) {
			_args_value.loadFrom(0, object);
		}
	};
	template<void* addr, typename Ret, typename... Args> CmdsImpl<addr, Ret, Args...>* CmdsImpl<addr, Ret, Args...>::_global_inst = nullptr;


	template<void* addr, typename Ret, typename... Args> struct EventsImpl : public IRunbase {
	private:
		Callable<Ret, Args...> _func = (Callable<Ret, Args...>)addr;
		SignatureImpl<Ret, Args...> _args_value;

		static EventsImpl<addr, Ret, Args...>* _global_inst;

	public:
		EventsImpl() : _args_value() { }
		EventsImpl(Args... args) : _args_value(args...) { }

		static EventsImpl<addr, Ret, Args...>* global() {
			if (!_global_inst) {
				_global_inst = new EventsImpl<addr, Ret, Args...>();
			}
			return _global_inst;
		}

		void execute(Args... args) {
			_args_value = SignatureImpl<Ret, Args...>(args...);
		}

		// IRunbase
		quint64 address() const {
			return (quint64) addr;
		}
		void run() {
			_args_value.execute(_func);
		}
		virtual void saveTo(datas::IDataObject& object) {
			_args_value.saveTo(0, object);
		}
		virtual void loadFrom(datas::IDataObject& object) {
			_args_value.loadFrom(0, object);
		}
	};
	template<void* addr, typename Ret, typename... Args> EventsImpl<addr, Ret, Args...>* EventsImpl<addr, Ret, Args...>::_global_inst = nullptr;
}