/**************************************************************************
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** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
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** This file is part of the Qt Installer Framework.
**
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** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
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** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
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**************************************************************************/
#include "operationrunner.h"

#include "errors.h"
#include "init.h"
#include "packagemanagercore.h"
#include "utils.h"

#include "kdupdaterupdateoperationfactory.h"

#include <iostream>

namespace {
class OutputHandler : public QObject
{
    Q_OBJECT

public slots:
   void drawItToCommandLine(const QString &outPut)
   {
       std::cout << qPrintable(outPut) << std::endl;
   }
};
}

using namespace QInstaller;
using namespace QInstallerCreator;

OperationRunner::OperationRunner()
    : m_core(0)
{
    m_path = QCoreApplication::applicationFilePath();
#ifdef Q_OS_MAC
    QDir resourcePath(QFileInfo(m_path).dir());
    resourcePath.cdUp();
    resourcePath.cd(QLatin1String("Resources"));
    m_path = resourcePath.filePath(QLatin1String("installer.dat"));
#endif
}

OperationRunner::OperationRunner(const QString &path)
    : m_core(0)
    , m_path(path)
{
}

OperationRunner::~OperationRunner()
{
    delete m_core;
}

bool OperationRunner::init()
{
    try {
        QInstaller::init();

        m_bc = BinaryContent::readAndRegisterFromBinary(m_path);
        m_core = new PackageManagerCore(m_bc.magicMarker(), m_bc.performedOperations());
    } catch (const Error &e) {
        std::cerr << qPrintable(e.message()) << std::endl;
        return false;
    } catch (...) {
        return false;
    }

    return true;
}

void OperationRunner::setVerbose(bool verbose)
{
    QInstaller::setVerbose(verbose);
}

int OperationRunner::runOperation(const QStringList &arguments)
{
    if (!init()) {
        qDebug() << "Could not init the package manager core - without this not all operations are working "
            "as expected.";
    }

    bool isPerformType = arguments.contains(QLatin1String("--runoperation"));
    bool isUndoType = arguments.contains(QLatin1String("--undooperation"));

    if ((!isPerformType && !isUndoType) || (isPerformType && isUndoType)) {
        std::cerr << "wrong arguments are used, cannot run this operation";
        return EXIT_FAILURE;
    }

    QStringList argumentList;

    if (isPerformType)
        argumentList = arguments.mid(arguments.indexOf(QLatin1String("--runoperation")) + 1);
    else
        argumentList = arguments.mid(arguments.indexOf(QLatin1String("--undooperation")) + 1);


    try {
        const QString operationName = argumentList.takeFirst();
        KDUpdater::UpdateOperation* const operation = KDUpdater::UpdateOperationFactory::instance()
            .create(operationName);
        if (!operation) {
            std::cerr << "Can not find the operation: " << qPrintable(operationName) << std::endl;
            return EXIT_FAILURE;
        }

        OutputHandler myOutPutHandler;
        QObject *const operationObject = dynamic_cast<QObject *>(operation);
        if (operationObject != 0) {
            const QMetaObject *const mo = operationObject->metaObject();
            if (mo->indexOfSignal(QMetaObject::normalizedSignature("outputTextChanged(QString)")) > -1) {
                QObject::connect(operationObject, SIGNAL(outputTextChanged(QString)),
                        &myOutPutHandler, SLOT(drawItToCommandLine(QString)));
            }
        }

        operation->setValue(QLatin1String("installer"), QVariant::fromValue(m_core));

        operation->setArguments(argumentList);

        bool readyPerformed = false;
        if (isPerformType)
            readyPerformed = operation->performOperation();

        if (isUndoType)
            readyPerformed = operation->undoOperation();

        std::cout << "========================================" << std::endl;
        if (readyPerformed) {
            std::cout << "Operation was successfully performed." << std::endl;
        } else {
            std::cerr << "There was a problem while performing the operation: "
                << qPrintable(operation->errorString()) << std::endl;
            return EXIT_FAILURE;
        }
    } catch (const QInstaller::Error &e) {
        std::cerr << qPrintable(e.message()) << std::endl;
        return EXIT_FAILURE;
    } catch (...) {
        std::cerr << "Caught unknown exception" << std::endl;
        return EXIT_FAILURE;
    }

    return EXIT_SUCCESS;
}

#include "operationrunner.moc"