/******************************************************************************************
*	Chili Direct3D Engine																  *
*	Copyright 2018 PlanetChili <http://www.planetchili.net>								  *
*																						  *
*	This file is part of Chili Direct3D Engine.											  *
*																						  *
*	Chili Direct3D Engine is free software: you can redistribute it and/or modify		  *
*	it under the terms of the GNU General Public License as published by				  *
*	the Free Software Foundation, either version 3 of the License, or					  *
*	(at your option) any later version.													  *
*																						  *
*	The Chili Direct3D Engine is distributed in the hope that it will be useful,		  *
*	but WITHOUT ANY WARRANTY; without even the implied warranty of						  *
*	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the						  *
*	GNU General Public License for more details.										  *
*																						  *
*	You should have received a copy of the GNU General Public License					  *
*	along with The Chili Direct3D Engine.  If not, see <http://www.gnu.org/licenses/>.    *
******************************************************************************************/
#pragma once
#include "ChiliWin.h"
#include "ChiliException.h"
#include "Keyboard.h"
#include "Mouse.h"
#include "Graphics.h"
#include <optional>
#include <memory>


class Window
{
public:
	class Exception : public ChiliException
	{
		using ChiliException::ChiliException;
	public:
		static std::string TranslateErrorCode(HRESULT hr) noexcept;
	};
	class HrException : public Exception
	{
	public:
		HrException(int line, const char* file, HRESULT hr) noexcept;
		const char* what() const noexcept override;
		const char* GetType() const noexcept override;
		HRESULT GetErrorCode() const noexcept;
		std::string GetErrorDescription() const noexcept;
	private:
		HRESULT hr;
	};
	class NoGfxException : public Exception
	{
	public:
		using Exception::Exception;
		const char* GetType() const noexcept override;
	};
private:
	// singleton manages registration/cleanup of window class
	class WindowClass
	{
	public:
		static const char* GetName() noexcept;
		static HINSTANCE GetInstance() noexcept;
	private:
		WindowClass() noexcept;
		~WindowClass();
		WindowClass(const WindowClass&) = delete;
		WindowClass& operator=(const WindowClass&) = delete;
		static constexpr const char* wndClassName = "Chili Direct3D Engine Window";
		static WindowClass wndClass;
		HINSTANCE hInst;
	};
public:
	Window(int width, int height, const char* name);
	~Window();
	Window(const Window&) = delete;
	Window& operator=(const Window&) = delete;
	void SetTitle(const std::string& title);
	static std::optional<int> ProcessMessages() noexcept;
	Graphics& Gfx();
private:
	static LRESULT CALLBACK HandleMsgSetup(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam) noexcept;
	static LRESULT CALLBACK HandleMsgThunk(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam) noexcept;
	LRESULT HandleMsg(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam) noexcept;
public:
	Keyboard kbd;
	Mouse mouse;
private:
	int width;
	int height;
	HWND hWnd;
	// 成员变量gfx在Window的构造函数执行的过程中才会被初始化，因此定义指针变量，用于初始化gfx
	std::unique_ptr<Graphics> pGfx;
};