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/*
 * Copyright (c) 2010-2016 Isode Limited.
 * All rights reserved.
 * See the COPYING file for more information.
 */

#include <Swift/QtUI/MUCSearch/QtMUCSearchWindow.h>

#include <QMovie>
#include <QPushButton>
#include <QScrollBar>
#include <QTimer>

#include <qdebug.h>

#include <Swift/Controllers/UIEvents/AddMUCBookmarkUIEvent.h>
#include <Swift/Controllers/UIEvents/JoinMUCUIEvent.h>

#include <Swift/QtUI/MUCSearch/MUCSearchDelegate.h>
#include <Swift/QtUI/MUCSearch/MUCSearchEmptyItem.h>
#include <Swift/QtUI/MUCSearch/MUCSearchModel.h>
#include <Swift/QtUI/QtSwiftUtil.h>

namespace Swift {

QtMUCSearchWindow::QtMUCSearchWindow() {
    ui_.setupUi(this);
#ifndef Q_OS_MAC
    setWindowIcon(QIcon(":/logo-icon-16.png"));
#endif
    setModal(true);
    ui_.filter_->hide();
    model_ = new MUCSearchModel();
    delegate_ = new MUCSearchDelegate();
    ui_.results_->setModel(model_);
    ui_.results_->setItemDelegate(delegate_);
    ui_.results_->setHeaderHidden(true);
    ui_.results_->setRootIsDecorated(true);
    ui_.results_->setAnimated(true);
    ui_.results_->setAlternatingRowColors(true);
    connect(ui_.searchButton, SIGNAL(clicked()), this, SLOT(handleSearch()));
    connect(ui_.service_, SIGNAL(activated(const QString&)), this, SLOT(handleSearch(const QString&)));
    connect(ui_.results_->selectionModel(), SIGNAL(selectionChanged (const QItemSelection&, const QItemSelection&)), this, SLOT(handleSelectionChanged (const QItemSelection&, const QItemSelection&)));
    connect(ui_.results_, SIGNAL(activated(const QModelIndex&)), this, SLOT(handleActivated(const QModelIndex&)));
    connect(ui_.results_, SIGNAL(activated(const QModelIndex&)), this, SLOT(handleActivated(const QModelIndex&)));
    // Not using a button box, because i can't seem to be able to make the ok button non-default (on mac)
    connect(ui_.okButton, SIGNAL(clicked()), this, SLOT(accept()));
    ui_.okButton->setEnabled(false);
    connect(ui_.cancelButton, SIGNAL(clicked()), this, SLOT(reject()));

    throbber_ = new QLabel(tr("Searching"), ui_.results_);
    throbber_->setMovie(new QMovie(":/icons/throbber.gif", QByteArray(), throbber_));
    throbber_->setToolTip(tr("Searching"));

    hasHadScrollBars_ = false;
    updateThrobberPosition();
    setSearchInProgress(false);
}

QtMUCSearchWindow::~QtMUCSearchWindow() {

}

void QtMUCSearchWindow::resizeEvent(QResizeEvent* /*event*/) {
    updateThrobberPosition();
}

void QtMUCSearchWindow::updateThrobberPosition() {
    bool isShown = throbber_->isVisible();
    int resultWidth = ui_.results_->width();
    int resultHeight = ui_.results_->height();
    //throbberWidth = throbber_->movie()->scaledSize().width();
    //throbberHeight = throbber_->movie()->scaledSize().height();
    int throbberWidth = 16; /* This is nasty, but the above doesn't work! */
    int throbberHeight = 16;
    /* It's difficult (or I spent a while trying) to work out whether the scrollbars are currently shown and their appropriate size,
     * because if you listen for the expanded/collapsed signals, you seem to get them before the scrollbars are updated.
     * This seems an acceptable workaround.
     */
    hasHadScrollBars_ |= ui_.results_->verticalScrollBar()->isVisible();
    int hMargin = hasHadScrollBars_ ? ui_.results_->verticalScrollBar()->width() + 2 : 2;
    int vMargin = 2; /* We don't get horizontal scrollbars */
    throbber_->setGeometry(QRect(resultWidth - throbberWidth - hMargin, resultHeight - throbberHeight - vMargin, throbberWidth, throbberHeight)); /* include margins */
    throbber_->setVisible(isShown);
}

void QtMUCSearchWindow::addSavedServices(const std::list<JID>& services) {
    ui_.service_->clear();
    foreach (const JID& jid, services) {
        ui_.service_->addItem(P2QSTRING(jid.toString()));
    }
    if (!services.empty()) {
        ui_.service_->setEditText(P2QSTRING(services.begin()->toString()));
    }
    else {
        ui_.service_->clearEditText();
    }
}

void QtMUCSearchWindow::handleActivated(const QModelIndex& index) {
    if (!index.isValid()) {
        return;
    }
    if (dynamic_cast<MUCSearchRoomItem*>(static_cast<MUCSearchItem*>(index.internalPointer()))) {
        accept();
    }
}

void QtMUCSearchWindow::handleSearch() {
    handleSearch(ui_.service_->currentText());
}

void QtMUCSearchWindow::handleSearch(const QString& service) {
    if (!service.isEmpty()) {
        onSearchService(JID(Q2PSTRING(service)));
    }
}

void QtMUCSearchWindow::show() {
    QWidget::show();
    QWidget::activateWindow();
}

void QtMUCSearchWindow::clearList() {
    model_->clear();
}

void QtMUCSearchWindow::addService(const MUCService& service) {
    updateThrobberPosition();
    MUCSearchServiceItem* serviceItem = new MUCSearchServiceItem(P2QSTRING(service.getJID().toString()));
    if (service.getRooms().size() > 0) {
        foreach (MUCService::MUCRoom room, service.getRooms()) {
            new MUCSearchRoomItem(P2QSTRING(room.getNode()), serviceItem);
        }
    }
    else {
        new MUCSearchEmptyItem(serviceItem);
    }
    model_->addService(serviceItem);
    ui_.results_->expandAll();

}

void QtMUCSearchWindow::setSearchInProgress(bool searching) {
    if (searching) {
        throbber_->movie()->start();
    } else {
        throbber_->movie()->stop();
    }
    throbber_->setVisible(searching);
}

void QtMUCSearchWindow::accept() {
    MUCSearchRoomItem* room = getSelectedRoom();
    if (room) {
        onFinished(JID(Q2PSTRING(room->getNode()), Q2PSTRING(room->getParent()->getHost())));
    }
    else {
        onFinished(boost::optional<JID>());
    }
    QDialog::accept();
}

void QtMUCSearchWindow::reject() {
    onFinished(boost::optional<JID>());
    QDialog::reject();
}

void QtMUCSearchWindow::handleSelectionChanged(const QItemSelection&, const QItemSelection&) {
    ui_.okButton->setEnabled(getSelectedRoom());
}

MUCSearchRoomItem* QtMUCSearchWindow::getSelectedRoom() const {
    // Not using selectedIndexes(), because this seems to cause a crash in Qt (4.7.0) in the
    // QModelIndexList destructor.
    // This is a workaround posted in http://www.qtcentre.org/threads/16933 (although this case
    // was resolved by linking against the debug libs, ours isn't, and we're not alone)
    QItemSelection ranges = ui_.results_->selectionModel()->selection();
    QModelIndexList lstIndex;
    for (int i = 0; i < ranges.count(); ++i) {
        QModelIndex parent = ranges.at(i).parent();
        int right = ranges.at(i).model()->columnCount(parent) - 1;
        if (ranges.at(i).left() == 0 && ranges.at(i).right() == right) {
            for (int r = ranges.at(i).top(); r <= ranges.at(i).bottom(); ++r) {
                lstIndex.append(ranges.at(i).model()->index(r, 0, parent));
            }
        }
    }
    if (lstIndex.isEmpty()) {
        return nullptr;
    }
    else {
        return dynamic_cast<MUCSearchRoomItem*>(static_cast<MUCSearchItem*>(lstIndex.first().internalPointer()));
    }
}

}