//////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////
//
// copyright            : (C) 2008 by Eran Ifrah
// file name            : pipedprocess.cpp
//
// -------------------------------------------------------------------------
// A
//              _____           _      _     _ _
//             /  __ \         | |    | |   (_) |
//             | /  \/ ___   __| | ___| |    _| |_ ___
//             | |    / _ \ / _  |/ _ \ |   | | __/ _ )
//             | \__/\ (_) | (_| |  __/ |___| | ||  __/
//              \____/\___/ \__,_|\___\_____/_|\__\___|
//
//                                                  F i l e
//
//    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.
//
//////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////
#include "pipedprocess.h"

#include "cl_standard_paths.h"
#include "wx/msgdlg.h"

#include <wx/filename.h>
#include <wx/sstream.h>
#include <wx/stdpaths.h>
#include <wx/txtstrm.h>

PipedProcess::PipedProcess(int id, const wxString& cmdLine)
    : wxProcess(NULL, id)
    , m_pid(-1)
    , m_cmd(cmdLine)
{
}

PipedProcess::~PipedProcess() {}

long PipedProcess::GetPid() { return m_pid; }

void PipedProcess::SetPid(long pid) { m_pid = pid; }

void PipedProcess::Terminate()
{
#ifdef __WXGTK__
    wxString cmd;
    wxFileName exePath(clStandardPaths::Get().GetExecutablePath());
    wxFileName script(exePath.GetPath(), wxT("codelite_kill_children"));
    cmd << wxT("/bin/bash -f ") << script.GetFullPath() << wxT(" ") << GetPid();
    wxExecute(cmd, wxEXEC_ASYNC);
#else
    wxKillError rc;
    wxKill(GetPid(), wxSIGKILL, &rc, wxKILL_CHILDREN);
#endif
}

long PipedProcess::Start(bool hide)
{
    Redirect();
    long flags = wxEXEC_ASYNC | wxEXEC_MAKE_GROUP_LEADER;
    if(!hide) {
        flags |= wxEXEC_NOHIDE;
    }

    m_pid = wxExecute(m_cmd, flags, this);
    return m_pid;
}

// read single line from input/error of the debugger
bool PipedProcess::HasInput(wxString& input)
{
    bool hasInput = false;
    bool cont1(true), cont2(true);
    while(cont1 || cont2) {
        cont1 = false;
        cont2 = false;
        while(IsInputAvailable()) {
            wxTextInputStream tis(*GetInputStream());
            // this assumes that the output is always line buffered
            wxChar ch = tis.GetChar();
            input << ch;
            hasInput = true;
            if(ch == wxT('\n')) {
                cont1 = false;
                break;
            } else {
                cont1 = true;
            }
        }

        while(IsErrorAvailable()) {
            wxTextInputStream tis(*GetErrorStream());
            // this assumes that the output is always line buffered
            wxChar ch = tis.GetChar();
            input << ch;
            hasInput = true;
            if(ch == wxT('\n')) {
                cont2 = false;
                break;
            } else {
                cont2 = true;
            }
        }
    }
    return hasInput;
}

bool PipedProcess::ReadAll(wxString& input)
{
    bool hasInput = false;
    bool cont1(true), cont2(true);

    wxTextInputStream tis(*GetInputStream());
    wxTextInputStream tie(*GetErrorStream());
    while(cont1 || cont2) {
        cont1 = false;
        cont2 = false;
        while(IsInputAvailable()) {
            // this assumes that the output is always line buffered
            wxChar ch = tis.GetChar();
            input << ch;
            hasInput = true;
            cont1 = true;
        }

        while(IsErrorAvailable()) {
            // this assumes that the output is always line buffered
            wxChar ch = tie.GetChar();
            input << ch;
            hasInput = true;
            cont2 = true;
        }
    }
    return hasInput;
}
