#include "AddOnsController.hxx"

#include <QSettings>
#include <QFileDialog>
#include <QMessageBox>
#include <QDebug>
#include <QQmlComponent>
#include <QDesktopServices>
#include <QValidator>

#include <simgear/package/Root.hxx>
#include <simgear/package/Catalog.hxx>

#include <Main/globals.hxx>
#include <Network/HTTPClient.hxx>

#include "LocalAircraftCache.hxx"
#include "LauncherMainWindow.hxx"
#include "CatalogListModel.hxx"
#include "InstallSceneryDialog.hxx"
#include "QtLauncher.hxx"

//////////////////////////////////////////////////////////////////////////

AddOnsController::AddOnsController(LauncherMainWindow *parent) :
    QObject(parent),
    m_launcher(parent)
{
    m_catalogs = new CatalogListModel(this,
                                      simgear::pkg::RootRef(globals->packageRoot()));

    connect(m_catalogs, &CatalogListModel::catalogsChanged, this, &AddOnsController::onCatalogsChanged);

    QSettings settings;
    m_sceneryPaths = settings.value("scenery-paths").toStringList();
    m_aircraftPaths = settings.value("aircraft-paths").toStringList();

    qmlRegisterUncreatableType<AddOnsController>("FlightGear.Launcher", 1, 0, "AddOnsControllers", "no");
    qmlRegisterUncreatableType<CatalogListModel>("FlightGear.Launcher", 1, 0, "CatalogListModel", "no");
}

QStringList AddOnsController::aircraftPaths() const
{
    return m_aircraftPaths;
}

QStringList AddOnsController::sceneryPaths() const
{
    return m_sceneryPaths;
}

QString AddOnsController::addAircraftPath() const
{
    QString path = QFileDialog::getExistingDirectory(m_launcher, tr("Choose aircraft folder"));
    if (path.isEmpty()) {
        return {};
    }

    // the user might add a directory containing an 'Aircraft' subdir. Let's attempt
    // to check for that case and handle it gracefully.
    bool pathOk = false;
    if (LocalAircraftCache::isCandidateAircraftPath(path)) {
        pathOk = true;
    } else {
        // no aircraft in specified path, look for Aircraft/ subdir
        QDir d(path);
        if (d.exists("Aircraft")) {
            QString p2 = d.filePath("Aircraft");
            if (LocalAircraftCache::isCandidateAircraftPath(p2)) {
                pathOk = true;
                path = p2;
            }
        }
    }

    if (!pathOk) {
        QMessageBox mb;
        mb.setText(tr("No aircraft found in the folder '%1' - add anyway?").arg(path));
        mb.setStandardButtons(QMessageBox::Yes | QMessageBox::No);
        mb.setDefaultButton(QMessageBox::No);
        mb.exec();

        if (mb.result() == QMessageBox::No) {
            return {};
        }
    }

    return path;
}

QString AddOnsController::addSceneryPath() const
{
    QString path = QFileDialog::getExistingDirectory(m_launcher, tr("Choose scenery folder"));
    if (path.isEmpty()) {
        return {};

    }

    // validation
    SGPath p(path.toStdString());
    bool isValid = false;

    for (const auto& dir: {"Objects", "Terrain", "Buildings", "Roads", "Pylons", "NavData"}) {
        if ((p / dir).exists()) {
            isValid = true;
            break;
        }
    }

    if (!isValid) {
        QMessageBox mb;
        mb.setText(tr("The folder '%1' doesn't appear to contain scenery - add anyway?").arg(path));
        mb.setStandardButtons(QMessageBox::Yes | QMessageBox::No);
        mb.setDefaultButton(QMessageBox::No);
        mb.setInformativeText(tr("Added scenery should contain at least one of the following "
                                 "folders: Objects, Terrain, Buildings, Roads, Pylons, NavData."));
        mb.exec();

        if (mb.result() == QMessageBox::No) {
            return {};
        }
    }

    return path;
}

QString AddOnsController::installCustomScenery()
{
    QSettings settings;
    QString downloadDir = settings.value("download-dir").toString();
    InstallSceneryDialog dlg(m_launcher, downloadDir);
    if (dlg.exec() == QDialog::Accepted) {
        return dlg.sceneryPath();
    }

    return {};
}

void AddOnsController::openDirectory(QString path)
{
    QUrl u = QUrl::fromLocalFile(path);
    QDesktopServices::openUrl(u);
}

void AddOnsController::setAircraftPaths(QStringList aircraftPaths)
{
    if (m_aircraftPaths == aircraftPaths)
        return;

    m_aircraftPaths = aircraftPaths;
    emit aircraftPathsChanged(m_aircraftPaths);


    QSettings settings;
    settings.setValue("aircraft-paths", m_aircraftPaths);
    auto aircraftCache = LocalAircraftCache::instance();
    aircraftCache->setPaths(m_aircraftPaths);
    aircraftCache->scanDirs();
}

void AddOnsController::setSceneryPaths(QStringList sceneryPaths)
{
    if (m_sceneryPaths == sceneryPaths)
        return;

    m_sceneryPaths = sceneryPaths;

    QSettings settings;
    settings.setValue("scenery-paths", m_sceneryPaths);

    flightgear::launcherSetSceneryPaths();

    emit sceneryPathsChanged(m_sceneryPaths);
}

void AddOnsController::officialCatalogAction(QString s)
{
    if (s == "hide") {
        QSettings settings;
        settings.setValue("hide-official-catalog-message", true);
    } else if (s == "add-official") {
        m_catalogs->installDefaultCatalog();
    }

    emit showNoOfficialHangarChanged();
}

bool AddOnsController::shouldShowOfficialCatalogMessage() const
{
    QSettings settings;
    bool showOfficialCatalogMesssage = !globals->get_subsystem<FGHTTPClient>()->isDefaultCatalogInstalled();
    if (settings.value("hide-official-catalog-message").toBool()) {
        showOfficialCatalogMesssage = false;
    }
    return showOfficialCatalogMesssage;
}


bool AddOnsController::isOfficialHangarRegistered()
{
    return globals->get_subsystem<FGHTTPClient>()->isDefaultCatalogInstalled();
}

bool AddOnsController::showNoOfficialHangar() const
{
    return shouldShowOfficialCatalogMessage();
}

void AddOnsController::onCatalogsChanged()
{
    emit showNoOfficialHangarChanged();
    emit isOfficialHangarRegisteredChanged();
}