/*
 *  ReactOS Task Manager
 *
 *  debug.cpp
 *
 *  Copyright (C) 1999 - 2001  Brian Palmer  <brianp@reactos.org>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#define WIN32_LEAN_AND_MEAN	/* Exclude rarely-used stuff from Windows headers */
#include <windows.h>
#include <commctrl.h>
#include <stdlib.h>
#include <malloc.h>
#include <memory.h>
#include <tchar.h>
#include <stdio.h>
#include <winnt.h>
	
#include "taskmgr.h"
#include "debug.h"
#include "procpage.h"
#include "perfdata.h"

void ProcessPage_OnDebug(void)
{
	LVITEM				lvitem;
	ULONG				Index;
	DWORD				dwProcessId;
	TCHAR				strErrorText[260];
	HKEY				hKey;
	TCHAR				strDebugPath[260];
	TCHAR				strDebugger[260];
	DWORD				dwDebuggerSize;
	PROCESS_INFORMATION	pi;
	STARTUPINFO			si;
	HANDLE				hDebugEvent;

	for (Index=0; Index<(ULONG)ListView_GetItemCount(hProcessPageListCtrl); Index++)
	{
		memset(&lvitem, 0, sizeof(LVITEM));

		lvitem.mask = LVIF_STATE;
		lvitem.stateMask = LVIS_SELECTED;
		lvitem.iItem = Index;

		ListView_GetItem(hProcessPageListCtrl, &lvitem);

		if (lvitem.state & LVIS_SELECTED)
			break;
	}

	dwProcessId = PerfDataGetProcessId(Index);

	if ((ListView_GetSelectedCount(hProcessPageListCtrl) != 1) || (dwProcessId == 0))
		return;

	if (MessageBox(hMainWnd, _T("WARNING: Debugging this process may result in loss of data.\nAre you sure you wish to attach the debugger?"), _T("Task Manager Warning"), MB_YESNO|MB_ICONWARNING) != IDYES)
	{
		GetLastErrorText(strErrorText, 260);
		MessageBox(hMainWnd, strErrorText, _T("Unable to Debug Process"), MB_OK|MB_ICONSTOP);
		return;
	}

	if (RegOpenKeyEx(HKEY_LOCAL_MACHINE, _T("Software\\Microsoft\\Windows NT\\CurrentVersion\\AeDebug"), 0, KEY_READ, &hKey) != ERROR_SUCCESS)
	{
		GetLastErrorText(strErrorText, 260);
		MessageBox(hMainWnd, strErrorText, _T("Unable to Debug Process"), MB_OK|MB_ICONSTOP);
		return;
	}

	dwDebuggerSize = 260;
	if (RegQueryValueEx(hKey, _T("Debugger"), NULL, NULL, (LPBYTE)strDebugger, &dwDebuggerSize) != ERROR_SUCCESS)
	{
		GetLastErrorText(strErrorText, 260);
		MessageBox(hMainWnd, strErrorText, _T("Unable to Debug Process"), MB_OK|MB_ICONSTOP);
		RegCloseKey(hKey);
		return;
	}

	RegCloseKey(hKey);

	hDebugEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
	if (!hDebugEvent)
	{
		GetLastErrorText(strErrorText, 260);
		MessageBox(hMainWnd, strErrorText, _T("Unable to Debug Process"), MB_OK|MB_ICONSTOP);
		return;
	}

	wsprintf(strDebugPath, strDebugger, dwProcessId, hDebugEvent);

	memset(&pi, 0, sizeof(PROCESS_INFORMATION));
	memset(&si, 0, sizeof(STARTUPINFO));
	si.cb = sizeof(STARTUPINFO);
	if (!CreateProcess(NULL, strDebugPath, NULL, NULL, FALSE, 0, NULL, NULL, &si, &pi))
	{
		GetLastErrorText(strErrorText, 260);
		MessageBox(hMainWnd, strErrorText, _T("Unable to Debug Process"), MB_OK|MB_ICONSTOP);
	}

	CloseHandle(hDebugEvent);
}