/**
 * UGENE - Integrated Bioinformatics Tools.
 * Copyright (C) 2008-2021 UniPro <ugene@unipro.ru>
 * http://ugene.net
 *
 * 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.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 * MA 02110-1301, USA.
 */

#ifndef _U2_OBJECTVIEW_TREE_CONTROLLER_
#define _U2_OBJECTVIEW_TREE_CONTROLLER_

#include <QAction>
#include <QTreeWidget>

#include <U2Core/SelectionModel.h>

#include <U2Gui/ObjectViewModel.h>

namespace U2 {

class OVTItem;
class OVTViewItem;
class OVTStateItem;

class U2GUI_EXPORT ObjectViewTreeController : public QObject {
    Q_OBJECT
public:
    ObjectViewTreeController(QTreeWidget *w);

    QAction *getAddStateAction() const {
        return addStateAction;
    }
    QAction *getRenameStateAction() const {
        return renameStateAction;
    }
    QAction *getRemoveStateAction() const {
        return removeStateAction;
    }

    const QIcon &getActiveBookmarkIcon() const {
        return bookmarkActiveIcon;
    }
    const QIcon &getInactiveBookmarkIcon() const {
        return bookmarkInactiveIcon;
    }
    OVTViewItem *findViewItem(const QString &name);

private slots:
    void sl_onMdiWindowAdded(MWMDIWindow *);
    void sl_onMdiWindowClosing(MWMDIWindow *);
    void sl_onMdiWindowActivated(MWMDIWindow *);
    void sl_onViewStateAdded(GObjectViewState *);
    void sl_onStateModified(GObjectViewState *);
    void sl_onViewStateRemoved(GObjectViewState *);
    void sl_onViewPersistentStateChanged(GObjectViewWindow *);
    void sl_onContextMenuRequested(const QPoint &);
    void sl_onTreeCurrentChanged(QTreeWidgetItem *current, QTreeWidgetItem *previous);
    void sl_onItemActivated(QTreeWidgetItem *, int);
    void sl_onItemChanged(QTreeWidgetItem *, int);
    void sl_onViewNameChanged(const QString &);

    void sl_activateView();
    void sl_addState();
    void sl_removeState();
    void sl_renameState();

private:
    void updateActions();
    void buildTree();
    void connectModel();
    void makeViewPersistent(GObjectViewWindow *w);
    void makeViewTransient(GObjectViewWindow *w);

    OVTStateItem *findStateItem(GObjectViewState *s);

    OVTItem *currentItem() const;
    OVTViewItem *currentViewItem(bool deriveFromState = false) const;
    OVTStateItem *currentStateItem() const;
    OVTViewItem *activeViewItem() const;

    GObjectViewState *findStateToOpen() const;

    void addViewWindow(GObjectViewWindow *);
    OVTStateItem *addState(GObjectViewState *);
    void removeState(GObjectViewState *s);

private:
    QTreeWidget *tree;

    QAction *activateViewAction;
    QAction *addStateAction;
    QAction *removeStateAction;
    QAction *renameStateAction;

    QIcon bookmarkStateIcon;
    QIcon bookmarkActiveIcon;
    QIcon bookmarkInactiveIcon;
};

class OVTItem : public QTreeWidgetItem {
public:
    OVTItem(ObjectViewTreeController *c)
        : controller(c) {
    }
    bool isRootItem() {
        return parent() == NULL;
    }
    virtual bool isViewItem() const {
        return false;
    }
    virtual bool isStateItem() const {
        return false;
    }
    virtual void updateVisual() = 0;
    ObjectViewTreeController *controller;
};

class OVTViewItem : public OVTItem {
public:
    OVTViewItem(GObjectViewWindow *view, ObjectViewTreeController *c);
    OVTViewItem(const QString &viewName, ObjectViewTreeController *c);
    virtual bool isViewItem() const {
        return true;
    }
    virtual void updateVisual();
    virtual void markAsActive(bool _isActive);
    virtual bool isActiveItem() {
        return isActive;
    }

    QString viewName;    //BUG:416: remove this field?
    GObjectViewWindow *viewWindow;

private:
    bool isActive;
};

class OVTStateItem : public OVTItem {
public:
    OVTStateItem(GObjectViewState *state, OVTViewItem *parent, ObjectViewTreeController *c);
    virtual bool isStateItem() const {
        return true;
    }
    virtual void updateVisual();
    GObjectViewState *state;
};

}    // namespace U2

#endif
