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#include "commands.h"

#define CLEAN_FAIL(a) {delete appName; \

    delete arguments; \

    return (a); }

int qRemoteLaunch(DWORD, BYTE*, DWORD*, BYTE**, IRAPIStream* stream)

{

    if (!stream)

        return -1;

    DWORD bytesRead;

    int appLength;

    wchar_t* appName = 0;

    int argumentsLength;

    wchar_t* arguments = 0;

    int timeout = -1;

    int returnValue = -2;

    DWORD error = 0;

    if (S_OK != stream->Read(&appLength, sizeof(appLength), &bytesRead))

        CLEAN_FAIL(-2);

    appName = (wchar_t*) malloc(sizeof(wchar_t)*(appLength + 1));

    if (S_OK != stream->Read(appName, sizeof(wchar_t)*appLength, &bytesRead))

        CLEAN_FAIL(-2);

    appName[appLength] = '\0';

    if (S_OK != stream->Read(&argumentsLength, sizeof(argumentsLength), &bytesRead))

        CLEAN_FAIL(-2);

    arguments = (wchar_t*) malloc(sizeof(wchar_t)*(argumentsLength + 1));

    if (S_OK != stream->Read(arguments, sizeof(wchar_t)*argumentsLength, &bytesRead))

        CLEAN_FAIL(-2);

    arguments[argumentsLength] = '\0';

    if (S_OK != stream->Read(&timeout, sizeof(timeout), &bytesRead))

        CLEAN_FAIL(-2);

    bool result = qRemoteExecute(appName, arguments, &returnValue, &error, timeout);

    if (timeout != 0) {

        if (S_OK != stream->Write(&returnValue, sizeof(returnValue), &bytesRead))

            CLEAN_FAIL(-4);

        if (S_OK != stream->Write(&error, sizeof(error), &bytesRead))

            CLEAN_FAIL(-5);

    }

    delete appName;

    delete arguments;

    // We need to fail here for the execute, otherwise the calling application will wait

    // forever for the returnValue.

    if (!result)

        return -3;

    return S_OK;

}

bool qRemoteExecute(const wchar_t* program, const wchar_t* arguments, int *returnValue, DWORD* error, int timeout)

{

    *error = 0;

    if (!program)

        return false;

    PROCESS_INFORMATION pid;

    if (!CreateProcess(program, arguments, NULL, NULL, false, 0, NULL, NULL, NULL, &pid)) {

        *error = GetLastError();

        wprintf(L"Could not launch: %s\n", program);

        return false;

    }

    // Timeout is in seconds

    DWORD waitingTime = (timeout == -1) ? INFINITE : timeout * 1000;

    if (waitingTime != 0) {

        DWORD waitStatus = WaitForSingleObject(pid.hProcess, waitingTime);

        if (waitStatus == WAIT_TIMEOUT) {

            TerminateProcess(pid.hProcess, 2);

            return false;

        } else if (waitStatus == WAIT_OBJECT_0 && returnValue) {

            *returnValue = 0;

            DWORD exitCode;

            if (GetExitCodeProcess(pid.hProcess, &exitCode))

                *returnValue = exitCode;

        }

    }

    return true;

}