#include "deblistmodel.h"
#include "packagesmanager.h"

#include <QApt/Backend>
#include <QtConcurrent>

using namespace QApt;

Backend *init_backend()
{
    Backend *b = new Backend;
    if(b->init()){
        return b;
    }

    qFatal("%s", b->initErrorMessage().toStdString().c_str());
    return nullptr;
}

PackagesManager::PackagesManager(QObject *parent)
    : QObject(parent)
{
    m_backendFuture = QtConcurrent::run(init_backend);
}

int PackagesManager::packageInstallStatus(const int index)
{
    if(m_packageInstallStatus.contains(index))
        return m_packageInstallStatus[index];

    const QString packageName = m_preparedPackages[index]->packageName();
    Backend *b = m_backendFuture.result();
    Package *p = b->package(packageName);

    int ret;
    do {
        const QString installVersion = p->installedVersion();
        if(installVersion.isEmpty())
        {
            ret = DebListModel::NotInstalled;
            break;
        }
        const QString packageVersion = m_preparedPackages[index]->version();
        const int result = Package::compareVersion(packageVersion, installVersion);

        if(result == 0)
            ret = DebListModel::InstalledSameVersion;
        else if(result > 0)
            ret = DebListModel::InstalledLaterVerision;
        else
            ret = DebListModel::InstalledEarlierVersion;
    } while(false);

    m_packageInstallStatus.insert(index, ret);
    return ret;
}

int PackagesManager::packageDependsStatus(const int index)
{
    if (m_packageDependsStatus.contains(index))
        return m_packageDependsStatus[index];

    return DebListModel::DependsOk;
}