/*
  Copyright (C) 2010 spx

  This program 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 2
  of the License, or (at your option) any later version.

  This program 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 this program; if not, write to the Free Software
  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
*/

#ifndef __RAINMETER_SYSTEM_H__
#define __RAINMETER_SYSTEM_H__

#include <windows.h>
#include <vector>

enum OSPLATFORM
{
	OSPLATFORM_UNKNOWN = 0,
	OSPLATFORM_9X,
	OSPLATFORM_NT4,
	OSPLATFORM_2K,
	OSPLATFORM_XP,
	OSPLATFORM_VISTA,
	OSPLATFORM_7
};

struct MONITOR_INFO
{
	bool active;
	HMONITOR handle;
	RECT screen;
	RECT work;
	WCHAR deviceName[32];					//Device name (E.g. "\\.\DISPLAY1")
	WCHAR monitorName[128];					//Monitor name (E.g. "Generic Non-PnP Monitor")
};

struct MULTIMONITOR_INFO
{
	bool useEnumDisplayDevices;				//If true, use EnumDisplayDevices function to obtain the multi-monitor information
	bool useEnumDisplayMonitors;			//If true, use EnumDisplayMonitors function to obtain the multi-monitor information

	int vsT, vsL, vsH, vsW;					//Coordinates of the top-left corner (vsT,vsL) and size (vsH,vsW) of the virtual screen
	int primary;							//Index of the primary monitor
	std::vector<MONITOR_INFO> monitors;		//Monitor information
};

class CSystem
{
public:
	static void Initialize(HINSTANCE instance);
	static void Finalize();

	static HWND GetWindow() { return c_Window; }

	static const MULTIMONITOR_INFO& GetMultiMonitorInfo() { return c_Monitors; }
	static size_t GetMonitorCount();

	static bool GetShowDesktop() { return c_ShowDesktop; }

	static HWND GetShellDesktopWindow(bool findWorkerW = false);
	static HWND GetWorkerW() { return GetShellDesktopWindow(true); }

	static HWND GetHelperWindow() { return c_HelperWindow; }
	static void PrepareHelperWindow(HWND WorkerW);

	static OSPLATFORM GetOSPlatform();

	static HMODULE RmLoadLibrary(LPCWSTR lpLibFileName, DWORD* dwError = NULL, bool ignoreErrors = false);

	static bool CopyFiles(const std::wstring& strFrom, const std::wstring& strTo, bool bMove = false);
	static bool RemoveFile(const std::wstring& file);

	static void GetIniFileMappingList(std::vector<std::wstring>& iniFileMappings);
	static std::wstring GetTemporaryFile(const std::vector<std::wstring>& iniFileMappings, const std::wstring& iniFile);

private:
	static void CALLBACK MyWinEventProc(HWINEVENTHOOK hWinEventHook, DWORD event, HWND hwnd, LONG idObject, LONG idChild, DWORD dwEventThread, DWORD dwmsEventTime);
	static LRESULT CALLBACK WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
	static BOOL DwmIsCompositionEnabled();

	static void SetMultiMonitorInfo();
	static void ClearMultiMonitorInfo() { c_Monitors.monitors.clear(); }
	static void UpdateWorkareaInfo();

	static HWND GetDefaultShellWindow();
	static void ChangeZPosInOrder();

	static void CheckDesktopState(HWND WorkerW);
	static bool BelongToSameProcess(HWND hwndA, HWND hwndB);

	static HWND c_Window;
	static HWND c_HelperWindow;

	static HWINEVENTHOOK c_WinEventHook;

	static MULTIMONITOR_INFO c_Monitors;		// Multi-Monitor info

	static bool c_ShowDesktop;

	static OSPLATFORM c_Platform;
};

#endif