/*

                          Firewall Builder

                 Copyright (C) 2003 NetCitadel, LLC

  Author:  Vadim Kurland     vadim@fwbuilder.org

  $Id$

  This program is free software which we release under the GNU General Public
  License. You may redistribute and/or modify this program under the terms
  of that 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.

  To get a copy of the GNU General Public License, write to the Free Software
  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

*/


#include "global.h"

#include "fwbuilder/FWObject.h"
#include "fwbuilder/Resources.h"
#include "fwbuilder/FWObjectDatabase.h"

#include "FWBTree.h"
#include "ProjectPanel.h"
#include "ObjectListView.h"
#include "ObjectListViewItem.h"
#include "FWObjectDrag.h"
#include "FWBSettings.h"
#include "FWObjectPropertiesFactory.h"

#include <QHeaderView>
#include <qdrag.h>
#include <qtreewidget.h>
#include <qpixmapcache.h>
#include <qtooltip.h>

#include <iostream>

using namespace std;
using namespace libfwbuilder;

/****************************************************************************
 *
 *    class ObjectListView
 *
 ****************************************************************************/

ObjectListView::ObjectListView(QWidget* parent, const char*, Qt::WindowFlags f) :
    QTreeWidget(parent)
{
    db = nullptr;
    setWindowFlags(f);
    /*setColumnWidthMode(0, QTreeWidget::Maximum);
    setColumnWidthMode(1, QTreeWidget::Maximum);
    setItemMargin( 2 );*/
    setFocusPolicy( Qt::StrongFocus  );
    setFocus();
    header()->setSectionsClickable(true);
    header()->setSectionsMovable(false);
    setSortingEnabled(true);
    sortByColumn ( 0, Qt::AscendingOrder );
    connect(header(), SIGNAL(sectionClicked (int)),
            this, SLOT(sectionClicked (int)));
}

bool ObjectListView::event(QEvent *event)
{
    if (event->type() == QEvent::ToolTip)
    {
        QHelpEvent *he = (QHelpEvent*) event;
        QPoint pos = he->pos();

        if (st->getObjTooltips())
        {
            int cx = pos.x(), cy = pos.y();

            //viewportToContents(pos.x(),pos.y(),cx,cy);

            FWObject  *obj=nullptr;
            QRect      cr;

            QTreeWidgetItem *itm = itemAt(QPoint(cx,cy - header()->height()));
            if (itm==nullptr) return false;
            int obj_id = itm->data(0, Qt::UserRole).toInt();
            obj = db->findInIndex(obj_id);
            if (obj==nullptr) return false;

            cr = visualItemRect(itm);

            QRect global = QRect(
                viewport()->mapToGlobal(cr.topLeft()),
                viewport()->mapToGlobal(cr.bottomRight()));

            //finally stretch rect up to component's width and even more
            //(it fixes bug with horizontal scroll)
            global.setWidth(width() + horizontalOffset());

            QToolTip::showText(mapToGlobal( he->pos() ),
                FWObjectPropertiesFactory::getObjectPropertiesDetailed(obj,
                                                                       true,
                                                                       true),
                this, global);
        }

        return true;
    }

    return QTreeWidget::event(event);
}

QDrag* ObjectListView::dragObject()
{
    QTreeWidgetItem *ovi = currentItem();
    // currentItem returns NULL if the list is empty
    if (ovi==nullptr) return nullptr;

    int obj_id = ovi->data(0, Qt::UserRole).toInt();
    FWObject *obj = db->findInIndex(obj_id);
    QString icn = (":/Icons/"+obj->getTypeName()+"/icon-ref").c_str();
        //Resources::global_res->getObjResourceStr(obj, "icon-ref").c_str();

    list<FWObject*> dragobj;
    dragobj.push_back(obj);

    FWObjectDrag    *drag = new FWObjectDrag(dragobj, this);
    //QPixmap          pm   = QPixmap::fromMimeSource( icn_filename );

    QPixmap pm;
    if ( ! QPixmapCache::find( icn, pm) )
    {
        pm.load( icn );
        QPixmapCache::insert( icn, pm);
    }

    drag->setPixmap( pm );
    drag->setHotSpot( QPoint( pm.rect().width() / 2,
                             pm.rect().height() / 2 ) );

    return drag;
}

void ObjectListView::dragMoveEvent( QDragMoveEvent *ev)
{
    if (fwbdebug)
        qDebug("ObjectListView::dragMoveEvent");
    ev->setAccepted( ev->mimeData()->hasFormat(FWObjectDrag::FWB_MIME_TYPE) );
}

void ObjectListView::dragEnterEvent( QDragEnterEvent *ev)
{
    if (fwbdebug)
        qDebug("ObjectListView::dragEnterEvent");
    //ev->setAccepted( ev->mimeData()->hasFormat(FWObjectDrag::FWB_MIME_TYPE) );

    QWidget *fromWidget = qobject_cast<QWidget*>(ev->source());

    // The source of DnD object must be the same instance of fwbuilder
    if (!fromWidget)
    {
        ev->setAccepted(false);
        return;
    }
   
    if (!ev->mimeData()->hasFormat(FWObjectDrag::FWB_MIME_TYPE))
    {
        ev->setAccepted(false);
        return;
    }

    list<FWObject*> dragol;
    if (!FWObjectDrag::decode(ev, dragol))
        ev->setAccepted(false);
    for (list<FWObject*>::iterator i=dragol.begin();i!=dragol.end(); ++i)
    {
        FWObject *dragobj = *i;
        assert(dragobj!=nullptr);

        if (FWBTree().isSystem(dragobj))
        {
// can not drop system folder anywhere 
            ev->setAccepted(false);
            return;
        }

        // see #1976 do not allow pasting object that has been deleted
        if (dragobj->getLibrary()->getId() == FWObjectDatabase::DELETED_OBJECTS_ID)
        {
            ev->setAccepted(false);
            return;
        }
    }

    ev->setAccepted(true);
}

void ObjectListView::dropEvent(QDropEvent *ev)
{
    if (fwbdebug)
        qDebug("ObjectListView::dropEvent");
    emit dropped(ev);
}

void ObjectListView::keyPressEvent(QKeyEvent *ev)
{
    if (ev->key()==Qt::Key_Delete)
    {
        emit delObject_sign();
    }
    QTreeWidget::keyPressEvent(ev);
}

void ObjectListView::mousePressEvent(QMouseEvent *event)
{
    startingDrag = true;
    QTreeWidget::mousePressEvent(event);
}

void ObjectListView::mouseMoveEvent(QMouseEvent *event)
{
    if (startingDrag)
    {
        QDrag *dr = dragObject();
        if (dr) dr->start();
        startingDrag = false;
    }
    QTreeWidget::mouseMoveEvent(event);
}

void ObjectListView::sectionClicked ( int logicalIndex ) 
{
    sortByColumn ( logicalIndex, Qt::AscendingOrder );
}