/*
    Rosegarden
    A MIDI and audio sequencer and musical notation editor.
 
    This program is Copyright 2000-2008
        Guillaume Laurent   <glaurent@telegraph-road.org>,
        Chris Cannam        <cannam@all-day-breakfast.com>,
        Richard Bown        <richard.bown@ferventsoftware.com>
 
    The moral rights of Guillaume Laurent, Chris Cannam, and Richard
    Bown to claim authorship of this work have been asserted.
 
    Other copyrights also apply to some parts of this work.  Please
    see the AUTHORS file and individual file headers for details.
 
    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.  See the file
    COPYING included with this distribution for more information.
*/


#include "StartupTester.h"

#include "misc/Debug.h"
#include "gui/dialogs/LilyPondOptionsDialog.h"

#include <kprocess.h>
#include <tqmutex.h>
#include <tqthread.h>
#include <tqregexp.h>


namespace Rosegarden
{

StartupTester::StartupTester() :
    m_ready(false),
    m_haveProjectPackager(false),
    m_haveLilyPondView(false),
    m_haveAudioFileImporter(false)
{
    TQHttp *http = new TQHttp();
    connect(http, TQ_SIGNAL(responseHeaderReceived(const TQHttpResponseHeader &)),
            this, TQ_SLOT(slotHttpResponseHeaderReceived(const TQHttpResponseHeader &)));
    connect(http, TQ_SIGNAL(done(bool)),
            this, TQ_SLOT(slotHttpDone(bool)));
    m_versionHttpFailed = false;
    http->setHost("www.rosegardenmusic.com");
    http->get("/latest-version.txt");
}

StartupTester::~StartupTester()
{
}

void
StartupTester::run()
{
    m_projectPackagerMutex.lock();
    m_lilyPondViewMutex.lock();
    m_audioFileImporterMutex.lock();
    m_ready = true;

    TDEProcess *proc = new TDEProcess();
    m_stdoutBuffer = "";
    TQObject::connect(proc, TQ_SIGNAL(receivedStdout(TDEProcess *, char *, int)),
                     this, TQ_SLOT(stdoutReceived(TDEProcess *, char *, int)));
    *proc << "rosegarden-audiofile-importer";
    *proc << "--conftest";
    proc->start(TDEProcess::Block, TDEProcess::All);
    if (!proc->normalExit() || proc->exitStatus()) {
        RG_DEBUG << "StartupTester - No audio file importer available" << endl;
        m_haveAudioFileImporter = false;
        parseStdoutBuffer(m_audioFileImporterMissing);
    } else {
        RG_DEBUG << "StartupTester - Audio file importer OK" << endl;
        m_haveAudioFileImporter = true;
    }
    delete proc;
    m_audioFileImporterMutex.unlock();

    proc = new TDEProcess;
    m_stdoutBuffer = "";
    TQObject::connect(proc, TQ_SIGNAL(receivedStdout(TDEProcess *, char *, int)),
                     this, TQ_SLOT(stdoutReceived(TDEProcess *, char *, int)));
    *proc << "rosegarden-project-package";
    *proc << "--conftest";
    proc->start(TDEProcess::Block, TDEProcess::All);
    if (!proc->normalExit() || proc->exitStatus()) {
        m_haveProjectPackager = false;
        // rosegarden-project-package ran but exited with an error code
        RG_DEBUG << "StartupTester - No project packager available" << endl;
        m_haveProjectPackager = false;
        parseStdoutBuffer(m_projectPackagerMissing);
    } else {
        RG_DEBUG << "StartupTester - Project packager OK" << endl;
        m_haveProjectPackager = true;
    }
    delete proc;
    m_projectPackagerMutex.unlock();

    proc = new TDEProcess();
    m_stdoutBuffer = "";
    TQObject::connect(proc, TQ_SIGNAL(receivedStdout(TDEProcess *, char *, int)),
                     this, TQ_SLOT(stdoutReceived(TDEProcess *, char *, int)));
    *proc << "rosegarden-lilypondview";
    *proc << "--conftest";
    proc->start(TDEProcess::Block, TDEProcess::All);
    if (!proc->normalExit() || proc->exitStatus()) {
        RG_DEBUG << "StartupTester - No lilypondview available" << endl;
        m_haveLilyPondView = false;
        parseStdoutBuffer(m_lilyPondViewMissing);
    } else {
        RG_DEBUG << "StartupTester - lilypondview OK" << endl;
        m_haveLilyPondView = true;
        TQRegExp re("LilyPond version: ([^\n]*)");
        if (re.search(m_stdoutBuffer) != -1) {
            LilyPondOptionsDialog::setDefaultLilyPondVersion(re.cap(1));
        }
    }
    delete proc;
    m_lilyPondViewMutex.unlock();
}

bool
StartupTester::isReady()
{
    while (!m_ready)
        usleep(10000);
    if (m_projectPackagerMutex.tryLock()) {
        m_projectPackagerMutex.unlock();
    } else {
        return false;
    }
    if (m_lilyPondViewMutex.tryLock()) {
        m_lilyPondViewMutex.unlock();
    } else {
        return false;
    }
    return true;
}

void
StartupTester::stdoutReceived(TDEProcess *, char *buffer, int len)
{
    m_stdoutBuffer += TQString::fromLatin1(buffer, len);
}

void
StartupTester::parseStdoutBuffer(TQStringList &target)
{
    TQRegExp re("Required: ([^\n]*)");
    if (re.search(m_stdoutBuffer) != -1) {
        target = TQStringList::split(", ", re.cap(1));
    }
}

bool
StartupTester::haveProjectPackager(TQStringList *missing)
{
    while (!m_ready)
        usleep(10000);
    TQMutexLocker locker(&m_projectPackagerMutex);
    if (missing) *missing = m_projectPackagerMissing;
    return m_haveProjectPackager;
}

bool
StartupTester::haveLilyPondView(TQStringList *missing)
{
    while (!m_ready)
        usleep(10000);
    TQMutexLocker locker(&m_lilyPondViewMutex);
    if (missing) *missing = m_lilyPondViewMissing;
    return m_haveLilyPondView;
}

bool
StartupTester::haveAudioFileImporter(TQStringList *missing)
{
    while (!m_ready)
        usleep(10000);
    TQMutexLocker locker(&m_audioFileImporterMutex);
    if (missing) *missing = m_audioFileImporterMissing;
    return m_haveAudioFileImporter;
}

bool
StartupTester::isVersionNewerThan(TQString a, TQString b)
{
    TQRegExp re("[._-]");
    TQStringList alist = TQStringList::split(re, a);
    TQStringList blist = TQStringList::split(re, b);
    int ae = alist.size();
    int be = blist.size();
    int e = std::max(ae, be);
    for (int i = 0; i < e; ++i) {
	int an = 0, bn = 0;
	if (i < ae) {
	    an = alist[i].toInt();
	    if (an == 0) an = -1; // non-numeric field -> "-pre1" etc
	}
	if (i < be) {
	    bn = blist[i].toInt();
	    if (bn == 0) bn = -1;
	}
	if (an < bn) return false;
	if (an > bn) return true;
    }
    return false;
}

void
StartupTester::slotHttpResponseHeaderReceived(const TQHttpResponseHeader &h)
{
    if (h.statusCode() / 100 != 2) m_versionHttpFailed = true;
}

void
StartupTester::slotHttpDone(bool error)
{
    TQHttp *http = const_cast<TQHttp *>(dynamic_cast<const TQHttp *>(sender()));
    if (!http) return;
    http->deleteLater();
    if (error) return;

    TQByteArray responseData = http->readAll();
    TQString str = TQString::fromUtf8(responseData.data());
    TQStringList lines = TQStringList::split('\n', str);
    if (lines.empty()) return;

    TQString latestVersion = lines[0];
    std::cerr << "Comparing current version \"" << VERSION
              << "\" with latest version \"" << latestVersion.ascii() << "\""
              << std::endl;
    if (isVersionNewerThan(latestVersion, VERSION)) {
        emit newerVersionAvailable(latestVersion);
    }
}

}

#include "StartupTester.moc"