// ==============================================================
// ==============================================================
//	This file is part of Glest Shared Library (www.glest.org)
//
//	Copyright (C) 2005 Matthias Braun <matze@braunis.de>
//
//	You can redistribute this code and/or modify it under
//	the terms of the GNU General Public License as published
//	by the Free Software Foundation; either version 2 of the
//	License, or (at your option) any later version
// ==============================================================

#ifndef _SHARED_PLATFORM_WINDOW_H_
#define _SHARED_PLATFORM_WINDOW_H_

#include <map>
#include <string>
#include <SDL.h>
#include <cassert>
#include "data_types.h"
#include "vec.h"
#include <vector>
#include "leak_dumper.h"

using std::map;
using std::vector;
using std::string;
using Shared::Graphics::Vec2i;

#if SDL_VERSION_ATLEAST(2,0,0)

typedef SDL_Keysym SDL_keysym;

#endif

namespace Shared {
	namespace Platform {

		class Timer;
		//class PlatformContextGl;

		enum MouseButton {
			mbUnknown,
			mbLeft,
			mbCenter,
			mbRight,
			mbButtonX1,
			mbButtonX2,

			mbCount
		};

		enum SizeState {
			ssMaximized,
			ssMinimized,
			ssRestored
		};

		class MouseState {
		private:
			bool states[mbCount];


		public:
			MouseState() {
				clear();
			}
			//MouseState(const MouseState &);
			//MouseState &operator=(const MouseState &);
			void clear() {
				memset(this, 0, sizeof(MouseState));
			}

			bool get(MouseButton b) const {
				if (b > 0 && b < mbCount) {
					return states[b];
				}
				return false;
			}

			void set(MouseButton b, bool state) {
				if (b > 0 && b < mbCount) {
					states[b] = state;
				}
			}
		};

		enum WindowStyle {
			wsFullscreen,
			wsWindowedFixed,
			wsWindowedResizable
		};

		// =====================================================
		//	class Window
		// =====================================================

		class Window {
		private:
			static SDL_Window *sdlWindow;
			Uint32 lastMouseDown[mbCount];
			int lastMouseX[mbCount];
			int lastMouseY[mbCount];

			static int64 lastMouseEvent;	/** for use in mouse hover calculations */
			static MouseState mouseState;
			static Vec2i mousePos;
			static bool isKeyPressedDown;
			static bool isFullScreen;
			static SDL_keysym keystate;
			static bool tryVSynch;
			static int64 lastToggle;

			static void setLastToggle(int64 lastToggle) {
				Window::lastToggle = lastToggle;
			}
			static int64 getLastToggle() {
				return Window::lastToggle;
			}

			static void setLastMouseEvent(int64 lastMouseEvent) {
				Window::lastMouseEvent = lastMouseEvent;
			}
			static int64 getLastMouseEvent() {
				return Window::lastMouseEvent;
			}

			static const MouseState &getMouseState() {
				return Window::mouseState;
			}
			static void setMouseState(MouseButton b, bool state) {
				Window::mouseState.set(b, state);
			}

			static const Vec2i &getMousePos() {
				return Window::mousePos;
			}
			static void setMousePos(const Vec2i &mousePos) {
				Window::mousePos = mousePos;
			}

			static void setKeystate(SDL_keysym state) {
				keystate = state;
			}

			//static bool masterserverMode;
			static map<wchar_t, bool> mapAllowedKeys;

		protected:
			//int w, h;
			static bool isActive;
			static bool allowAltEnterFullscreenToggle;
			static int lastShowMouseState;

		public:
			static SDL_Window *getSDLWindow();
			static bool handleEvent();
			static void revertMousePos();
			static Vec2i getOldMousePos();
			static bool isKeyDown() {
				return isKeyPressedDown;
			}
			static void setupGraphicsScreen(int depthBits = -1, int stencilBits = -1, bool hardware_acceleration = false, bool fullscreen_anti_aliasing = false);
			static const bool getIsFullScreen() {
				return isFullScreen;
			}
			static void setIsFullScreen(bool value) {
				isFullScreen = value;
			}
			//static SDL_keysym getKeystate() { return keystate; }
			static bool isKeyStateModPressed(int mod);
			static wchar_t extractLastKeyPressed();

			Window();
			Window(SDL_Window *sdlWindow);
			virtual ~Window();

			static void addAllowedKeys(string keyList);
			static void clearAllowedKeys();
			static bool isAllowedKey(wchar_t key);

			virtual int getScreenWidth() = 0;
			virtual int getScreenHeight() = 0;

			virtual bool ChangeVideoMode(bool preserveContext, int resWidth, int resHeight,
				bool fullscreenWindow, int colorBits, int depthBits, int stencilBits,
				bool hardware_acceleration, bool fullscreen_anti_aliasing,
				float gammaValue) = 0;
			//static void setMasterserverMode(bool value) { Window::masterserverMode = value;}
			//static bool getMasterserverMode() { return Window::masterserverMode;}

			static bool getTryVSynch() {
				return tryVSynch;
			}
			static void setTryVSynch(bool value) {
				tryVSynch = value;
			}

			WindowHandle getHandle() {
				return 0;
			}
			string getText();
			int getX() {
				return 0;
			}
			int getY() {
				return 0;
			}
			int getW() {
				return getScreenWidth();
			}
			int getH() {
				return getScreenHeight();
			}

			//component state
			int getClientW() {
				return getW();
			}
			int getClientH() {
				return getH();
			}
			float getAspect();

			//object state
			void setText(string text);
			void setStyle(WindowStyle windowStyle);
			void setSize(int w, int h);
			void setPos(int x, int y);
			void setEnabled(bool enabled);
			void setVisible(bool visible);

			//misc
			void create();
			void destroy();
			void minimize();

			static void setAllowAltEnterFullscreenToggle(bool value) {
				allowAltEnterFullscreenToggle = value;
			}
			static bool getAllowAltEnterFullscreenToggle() {
				return allowAltEnterFullscreenToggle;
			}

			static char getRawKey(SDL_keysym keysym);

		protected:

			void setSDLWindow(SDL_Window *window);

			virtual void eventCreate() {
			}
			virtual void eventMouseDown(int x, int y, MouseButton mouseButton) {
			}
			virtual void eventMouseUp(int x, int y, MouseButton mouseButton) {
			}
			virtual void eventMouseMove(int x, int y, const MouseState* mouseState) {
			}
			virtual void eventMouseDoubleClick(int x, int y, MouseButton mouseButton) {
			}
			virtual void eventMouseWheel(int x, int y, int zDelta) {
			}
			virtual void eventKeyDown(SDL_KeyboardEvent key) {
			}
			virtual void eventKeyUp(SDL_KeyboardEvent key) {
			}
			virtual void eventKeyPress(SDL_KeyboardEvent c) {
			}
			virtual bool eventTextInput(std::string text) {
				return false;
			}
			virtual bool eventSdlKeyDown(SDL_KeyboardEvent key) {
				return false;
			}
			virtual void eventResize() {
			};
			virtual void eventPaint() {
			}
			virtual void eventTimer(int timerId) {
			}
			virtual void eventActivate(bool activated) {
			};
			virtual void eventResize(SizeState sizeState) {
			};
			virtual void eventMenu(int menuId) {
			}
			virtual void eventClose() {
			};
			virtual void eventDestroy() {
			};
			virtual void eventToggleFullScreen(bool isFullscreen) {
			};
			virtual void eventWindowEvent(SDL_WindowEvent event) {
			}

		private:
			/// needed to detect double clicks
			void handleMouseDown(SDL_Event event);
			void handleMouseWheel(SDL_Event event);

			static MouseButton getMouseButton(int sdlButton);
			//static char getKey(SDL_keysym keysym, bool skipSpecialKeys=false);
			//static char getNormalKey(SDL_keysym keysym,bool skipSpecialKeys=false);
			static void toggleFullscreen();

			static wchar_t convertStringtoSDLKey(const string &value);
		};

		bool isKeyPressed(SDL_Keycode compareKey, SDL_KeyboardEvent input, vector<int> modifiersToCheck);
		bool isKeyPressed(SDL_Keycode compareKey, SDL_KeyboardEvent input, bool modifiersAllowed = true);

		SDL_Keycode extractKeyPressed(SDL_KeyboardEvent input);
		//bool isAllowedInputTextKey(SDL_Keycode key);

		//wchar_t extractKeyPressedUnicode(SDL_KeyboardEvent input);
		vector<int> extractKeyPressedUnicodeLength(string text);
		bool isAllowedInputTextKey(wchar_t &key);

	}
}//end namespace

#endif