// WTLExplorer.cpp : main source file for WTLExplorer.exe
//

#include "stdafx.h"

#include <atlframe.h>
#include <atlctrls.h>
#include <atldlgs.h>
#include <atlctrlw.h>

#include "resource.h"

#include "mainfrm.h"

CAppModule _Module;


class CThreadManager
{
public:
	// thread init param
	struct _RunData
	{
		LPTSTR lpstrCmdLine;
		int nCmdShow;
	};

	// thread proc
	static DWORD WINAPI RunThread(LPVOID lpData)
	{
		CMessageLoop theLoop;
		_Module.AddMessageLoop(&theLoop);

		_RunData* pData = (_RunData*)lpData;
		CMainFrame wndFrame;

		if(wndFrame.CreateEx() == NULL)
		{
			ATLTRACE(_T("Frame window creation failed!\n"));
			return 0;
		}

		wndFrame.ShowWindow(pData->nCmdShow);
		::SetForegroundWindow(wndFrame);	// Win95 needs this
		delete pData;

		int nRet = theLoop.Run();

		_Module.RemoveMessageLoop();
		return nRet;
	}

	DWORD m_dwCount;
	HANDLE m_arrThreadHandles[MAXIMUM_WAIT_OBJECTS - 1];

	CThreadManager() : m_dwCount(0)
	{ }

// Operations
	DWORD AddThread(LPTSTR lpstrCmdLine, int nCmdShow)
	{
		if(m_dwCount == (MAXIMUM_WAIT_OBJECTS - 1))
		{
			::MessageBox(NULL, _T("ERROR: Cannot create ANY MORE threads!!!"), _T("WTLExplorer"), MB_OK);
			return 0;
		}

		_RunData* pData = new _RunData;
		pData->lpstrCmdLine = lpstrCmdLine;
		pData->nCmdShow = nCmdShow;
		DWORD dwThreadID;
		HANDLE hThread = ::CreateThread(NULL, 0, RunThread, pData, 0, &dwThreadID);
		if(hThread == NULL)
		{
			::MessageBox(NULL, _T("ERROR: Cannot create thread!!!"), _T("WTLExplorer"), MB_OK);
			return 0;
		}

		m_arrThreadHandles[m_dwCount] = hThread;
		m_dwCount++;
		return dwThreadID;
	}

	void RemoveThread(DWORD dwIndex)
	{
		if(dwIndex != (m_dwCount - 1))
			m_arrThreadHandles[dwIndex] = m_arrThreadHandles[m_dwCount - 1];
		m_dwCount--;
	}

	int Run(LPTSTR lpstrCmdLine, int nCmdShow)
	{
		MSG msg;
		// force message queue to be created
		::PeekMessage(&msg, NULL, WM_USER, WM_USER, PM_NOREMOVE);

		AddThread(lpstrCmdLine, nCmdShow);

		int nRet = m_dwCount;
		DWORD dwRet;
		while(m_dwCount > 0)
		{
			dwRet = ::MsgWaitForMultipleObjects(m_dwCount, m_arrThreadHandles, FALSE, INFINITE, QS_ALLINPUT);

			if(dwRet == 0xFFFFFFFF)
				::MessageBox(NULL, _T("ERROR: Wait for multiple objects failed!!!"), _T("WTLExplorer"), MB_OK);
			else if(dwRet >= WAIT_OBJECT_0 && dwRet <= (WAIT_OBJECT_0 + m_dwCount - 1))
				RemoveThread(dwRet - WAIT_OBJECT_0);
			else if(dwRet == (WAIT_OBJECT_0 + m_dwCount))
			{
				::GetMessage(&msg, NULL, 0, 0);
				if(msg.message == WM_USER)
					AddThread(_T(""), SW_SHOWNORMAL);
				else
					::MessageBeep((UINT)-1);
			}
			else
				::MessageBeep((UINT)-1);
		}

		return nRet;
	}
};

int WINAPI _tWinMain(HINSTANCE hInstance, HINSTANCE /*hPrevInstance*/, LPTSTR lpstrCmdLine, int nCmdShow)
{
	HRESULT hRes = ::CoInitialize(NULL);
	ATLASSERT(SUCCEEDED(hRes));

	AtlInitCommonControls(ICC_COOL_CLASSES | ICC_BAR_CLASSES | ICC_USEREX_CLASSES);

	hRes = _Module.Init(NULL, hInstance);
	ATLASSERT(SUCCEEDED(hRes));

	CThreadManager mgr;
	int nRet = mgr.Run(lpstrCmdLine, nCmdShow);

	_Module.Term();
	::CoUninitialize();

	return nRet;
}