# -*- coding: utf-8 -*-
# $Id: winbase.py 56295 2015-06-09 14:29:55Z vboxsync $

"""
This module is here to externalize some Windows specifics that gives pychecker
a hard time when running on non-Windows systems.
"""

__copyright__ = \
"""
Copyright (C) 2010-2015 Oracle Corporation

This file is part of VirtualBox Open Source Edition (OSE), as
available from http://www.virtualbox.org. This file is free software;
you can redistribute it and/or modify it under the terms of the GNU
General Public License (GPL) as published by the Free Software
Foundation, in version 2 as it comes in the "COPYING" file of the
VirtualBox OSE distribution. VirtualBox OSE is distributed in the
hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.

The contents of this file may alternatively be used under the terms
of the Common Development and Distribution License Version 1.0
(CDDL) only, as it comes in the "COPYING.CDDL" file of the
VirtualBox OSE distribution, in which case the provisions of the
CDDL are applicable instead of those of the GPL.

You may elect to license modified versions of this file under the
terms and conditions of either the GPL or the CDDL or both.
"""
__version__ = "$Revision: 56295 $"


# Standard Python imports.
import os

# Windows specific imports.
import win32api;            # pylint: disable=F0401
import win32con;            # pylint: disable=F0401
import win32console;        # pylint: disable=F0401
import win32event;          # pylint: disable=F0401
import win32process;        # pylint: disable=F0401

# Validation Kit imports.
from testdriver import reporter;



#
# Windows specific implementation of base functions.
#

def processInterrupt(uPid):
    """
    The Windows version of base.processInterrupt

    Note! This doesn't work terribly well with a lot of processes.
    """
    try:
        win32console.GenerateConsoleCtrlEvent(win32con.CTRL_BREAK_EVENT, uPid);
        #GenerateConsoleCtrlEvent = ctypes.windll.kernel32.GenerateConsoleCtrlEvent
        #rc = GenerateConsoleCtrlEvent(1, uPid);
        #reporter.log('GenerateConsoleCtrlEvent -> %s' % (rc,));
        fRc = True;
    except:
        reporter.logXcpt('uPid=%s' % (uPid,));
        fRc = False;
    return fRc;

def postThreadMesssageClose(uTid):
    """ Posts a WM_CLOSE message to the specified thread."""
    fRc = False;
    try:
        win32api.PostThreadMessage(uTid, win32con.WM_CLOSE, 0, 0);
        fRc = True;
    except:
        reporter.logXcpt('uTid=%s' % (uTid,));
    return fRc;

def postThreadMesssageQuit(uTid):
    """ Posts a WM_QUIT message to the specified thread."""
    fRc = False;
    try:
        win32api.PostThreadMessage(uTid, win32con.WM_QUIT, 0x40010004, 0); # DBG_TERMINATE_PROCESS
        fRc = True;
    except:
        reporter.logXcpt('uTid=%s' % (uTid,));
    return fRc;

def processTerminate(uPid):
    """ The Windows version of base.processTerminate """
    fRc = False;
    try:
        hProcess = win32api.OpenProcess(win32con.PROCESS_TERMINATE, False, uPid);
    except:
        reporter.logXcpt('uPid=%s' % (uPid,));
    else:
        try:
            win32process.TerminateProcess(hProcess, 0x40010004); # DBG_TERMINATE_PROCESS
            fRc = True;
        except:
            reporter.logXcpt('uPid=%s' % (uPid,));
        win32api.CloseHandle(hProcess)
    return fRc;

def processKill(uPid):
    """ The Windows version of base.processKill """
    return processTerminate(uPid);

def processExists(uPid):
    """ The Windows version of base.processExists """
    fRc = False;
    try:
        hProcess = win32api.OpenProcess(win32con.PROCESS_QUERY_INFORMATION, False, uPid);
    except:
        reporter.logXcpt('uPid=%s' % (uPid,));
    else:
        win32api.CloseHandle(hProcess)
        fRc = True;
    return fRc;

def processCheckPidAndName(uPid, sName):
    """ The Windows version of base.processCheckPidAndName """
    fRc = processExists(uPid);
    if fRc is True:
        try:
            from win32com.client import GetObject; # pylint: disable=F0401
            oWmi = GetObject('winmgmts:');
            aoProcesses = oWmi.InstancesOf('Win32_Process');
            for oProcess in aoProcesses:
                if long(oProcess.Properties_("ProcessId").Value) == uPid:
                    sCurName = oProcess.Properties_("Name").Value;
                    reporter.log2('uPid=%s sName=%s sCurName=%s' % (uPid, sName, sCurName));
                    sName    = sName.lower();
                    sCurName = sCurName.lower();
                    if os.path.basename(sName) == sName:
                        sCurName = os.path.basename(sCurName);

                    if  sCurName == sName \
                    or sCurName + '.exe' == sName \
                    or sCurName == sName  + '.exe':
                        fRc = True;
                    break;
        except:
            reporter.logXcpt('uPid=%s sName=%s' % (uPid, sName));
    return fRc;

#
# Some helper functions.
#
def processCreate(sName, asArgs):
    """
    Returns a (pid, handle, tid) tuple on success. (-1, None) on failure (logged).
    """

    # Construct a command line.
    sCmdLine = '';
    for sArg in asArgs:
        if sCmdLine == '':
            sCmdLine += '"';
        else:
            sCmdLine += ' "';
        sCmdLine += sArg;
        sCmdLine += '"';

    # Try start the process.
    dwCreationFlags = win32con.CREATE_NEW_PROCESS_GROUP;
    oStartupInfo    = win32process.STARTUPINFO();
    try:
        (hProcess, hThread, uPid, uTid) = win32process.CreateProcess(sName,
            sCmdLine,                   # CommandLine
            None,                       # ProcessAttributes
            None,                       # ThreadAttibutes
            1,                          # fInheritHandles
            dwCreationFlags,
            None,                       # Environment
            None,                       # CurrentDirectory.
            oStartupInfo);
    except:
        reporter.logXcpt('sName="%s" sCmdLine="%s"' % (sName, sCmdLine));
        return (-1, None, -1);

    # Dispense with the thread handle.
    try:
        win32api.CloseHandle(hThread);
    except:
        reporter.logXcpt();

    # Try get full access to the process.
    try:
        hProcessFullAccess = win32api.DuplicateHandle( \
            win32api.GetCurrentProcess(), \
            hProcess, \
            win32api.GetCurrentProcess(), \
            win32con.PROCESS_TERMINATE \
            | win32con.PROCESS_QUERY_INFORMATION \
            | win32con.SYNCHRONIZE  \
            | win32con.DELETE, \
            False, \
            0);
        win32api.CloseHandle(hProcess);
        hProcess = hProcessFullAccess;
    except:
        reporter.logXcpt();
    reporter.log2('processCreate -> %#x, hProcess=%#x' % (uPid, hProcess,));
    return (uPid, hProcess, uTid);

def processPollByHandle(hProcess):
    """
    Polls the process handle to see if it has finished (True) or not (False).
    """
    try:
        dwWait = win32event.WaitForSingleObject(hProcess, 0);
    except:
        reporter.logXcpt('hProcess=%s %#x' % (hProcess, hProcess,));
        return True;
    return dwWait != win32con.WAIT_TIMEOUT; #0x102; #


def processTerminateByHandle(hProcess):
    """
    Terminates the process.
    """
    try:
        win32api.TerminateProcess(hProcess, 0x40010004); # DBG_TERMINATE_PROCESS
    except:
        reporter.logXcpt('hProcess=%s %#x' % (hProcess, hProcess,));
        return False;
    return True;