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/*
 For general Scribus (>=1.3.2) copyright and licensing information please refer
 to the COPYING file provided with the program. Following this notice may exist
 a copyright and/or license notice that predates the release of Scribus 1.3.2
 for which a new license (GPL+exception) is in place.
 */

/***************************************************************************
*                                                                         *
*   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.                                   *
*                                                                         *
***************************************************************************/



#include "canvasmode_drawbezier.h"

#include <QApplication>
#include <QButtonGroup>
#include <QCheckBox>
#include <QCursor>
#include <QEvent>
#include <QMessageBox>
#include <QMouseEvent>
#include <QPainterPath>
#include <QPoint>
#include <QRect>
#include <QWidgetAction>


#include "appmodes.h"
#include "canvas.h"
#include "canvasgesture_resize.h"
#include "fpoint.h"
#include "fpointarray.h"
#include "hyphenator.h"
#include "pageitem_textframe.h"
#include "prefscontext.h"
#include "prefsfile.h"
#include "prefsmanager.h"
#include "scraction.h"
#include "scribus.h"
#include "scribusXml.h"
#include "scribusdoc.h"
#include "scribusview.h"
#include "selection.h"
#include "ui/insertTable.h"
#include "ui/pageselector.h"
#include "ui/propertiespalette.h"
#include "ui/scrapbookpalette.h"
#include "undomanager.h"
#include "units.h"
#include "util.h"
#include "util_math.h"





BezierMode::BezierMode(ScribusView* view) : CanvasMode(view)
{
}


void BezierMode::drawControls(QPainter* p)
{
        //
}

inline bool BezierMode::GetItem(PageItem** pi)
{
        *pi = m_doc->m_Selection->itemAt(0);
        return (*pi) != nullptr;
}

void BezierMode::finalizeItem(PageItem* currItem)
{
        if (currItem->PoLine.size() % 4 != 0)
                currItem->PoLine.resize(currItem->PoLine.size()-2);
        if (currItem->PoLine.size() < 4)
        {
                m_doc->Items->removeOne(currItem);
                m_doc->m_Selection->removeFirst();
        }
        else
        {
                m_doc->sizeItem(currItem->PoLine.widthHeight().x(), currItem->PoLine.widthHeight().y(), currItem, false, false);
//              currItem->setPolyClip(qRound(qMax(currItem->lineWidth() / 2.0, 1)));
                m_doc->adjustItemSize(currItem);
                currItem->ContourLine = currItem->PoLine.copy();
        }
        m_view->resetMousePressed();
        currItem->checkChanges();
        currItem->update();
        currItem->emitAllToGUI();
}

// the following code was moved from scribusview.cpp:

void BezierMode::enterEvent(QEvent *e)
{
        if (!m_mouseButtonPressed)
        {
                setModeCursor();
        }
}


void BezierMode::leaveEvent(QEvent *e)
{
}


void BezierMode::activate(bool fromGesture)
{
//      qDebug() << "DrawBezierMode::activate" << flag;
        CanvasMode::activate(fromGesture);

        m_xp = m_yp = -1;
        m_inItemCreation = false;
        m_firstPoly = true;
        setModeCursor();
}

void BezierMode::deactivate(bool forGesture)
{
//      qDebug() << "BezierMode::deactivate" << flag;
//      m_view->stopDragTimer();

        CanvasMode::deactivate(forGesture);

        //When only one node(size=2) was created; it's not a valid line(min valid PoLine size is 6), delete it
        PageItem* currItem = m_doc->m_Selection->itemAt(0);
        if (currItem)
        {
                if (currItem->PoLine.size() % 4 != 0)
                        currItem->PoLine.resize(qMax(0, static_cast<int>(currItem->PoLine.size())-2));
                if (currItem->PoLine.size() < 4)
                {
                        m_view->deselectItems(false);
                        Selection tempSelection(m_doc, false);
                        tempSelection.addItem(currItem);
                        m_doc->itemSelection_DeleteItem(&tempSelection, true);
                        currItem = nullptr;
                }
        }

        if (m_inItemCreation)
        {
                undoManager->setUndoEnabled(true);
                m_inItemCreation = false;
        }

        UndoTransaction undoTrans;
        if (currItem && UndoManager::undoEnabled())
        {
                undoTrans = undoManager->beginTransaction("creating");
                ScItemState<PageItem*> *is = new ScItemState<PageItem*>("Create PageItem");
                is->set("CREATE_ITEM");
                is->setItem(currItem);
                //Undo target rests with the Page for object specific undo
                UndoObject *target = m_doc->Pages->at(0);
                if (currItem->OwnPage > -1)
                        target = m_doc->Pages->at(currItem->OwnPage);
                undoManager->action(target, is);
        }

        m_view->setRedrawMarkerShown(false);
        if (!currItem)
                return;

        m_doc->sizeItem(currItem->PoLine.widthHeight().x(), currItem->PoLine.widthHeight().y(), currItem, false, false);
        currItem->setPolyClip(qRound(qMax(currItem->lineWidth() / 2.0, 1.0)));
        m_doc->adjustItemSize(currItem);
        currItem->ContourLine = currItem->PoLine.copy();
        currItem->ClipEdited = true;
        currItem->FrameType = 3;

        if (undoTrans)
        {
                QString targetName = Um::ScratchSpace;
                if (currItem->OwnPage > -1)
                        targetName = m_doc->Pages->at(currItem->OwnPage)->getUName();
                undoTrans.commit(targetName, currItem->getUPixmap(), Um::Create + " " + currItem->getUName(),  "", Um::ICreate);
        }
}

void BezierMode::mouseDoubleClickEvent(QMouseEvent *m)
{
        m->accept();
        m_mouseButtonPressed = false;
        m_canvas->resetRenderMode();
        mousePressEvent(m);
        mouseReleaseEvent(m);
        PageItem *currItem = nullptr;
        if (m_doc->appMode == modeDrawBezierLine)
        {
                m_view->stopGesture();
                undoManager->setUndoEnabled(true);
                currItem = m_doc->m_Selection->itemAt(0);
                if (currItem != nullptr)
                        finalizeItem(currItem);
                if (!PrefsManager::instance().appPrefs.uiPrefs.stickyTools)
                        m_view->requestMode(modeNormal);
                else
                        m_view->requestMode(m_doc->appMode);
                m_doc->changed();
                m_firstPoly = true;
                m_inItemCreation = false;
                m_canvas->setRenderModeUseBuffer(false);
        }
        m_doc->DragP = false;
        m_doc->leaveDrag = false;
        m_view->MidButt = false;
        if (m_view->groupTransactionStarted())
        {
                for (int i = 0; i < m_doc->m_Selection->count(); ++i)
                        m_doc->m_Selection->itemAt(i)->checkChanges(true);
                m_view->endGroupTransaction();
        }
        //Make sure the Zoom spinbox and page selector don't have focus if we click on the canvas
        m_view->m_ScMW->zoomSpinBox->clearFocus();
        m_view->m_ScMW->pageSelector->clearFocus();
        if (m_doc->m_Selection->itemAt(0) != nullptr) // is there the old clip stored for the undo action
        {
                currItem = m_doc->m_Selection->itemAt(0);
                m_doc->nodeEdit.finishTransaction(currItem);
        }
}


void BezierMode::mouseMoveEvent(QMouseEvent *m)
{
        const FPoint mousePointDoc = m_canvas->globalToCanvas(m->globalPos());
       
        double newX, newY;
        PageItem *currItem;
        FPoint npf, npf2;
//      QRect tx;
        m->accept();
        m_canvas->displayCorrectedXYHUD(m->globalPos(), mousePointDoc.x(), mousePointDoc.y());
//      qDebug() << "legacy mode move:" << m->x() << m->y() << m_canvas->globalToCanvas(m->globalPos()).x() << m_canvas->globalToCanvas(m->globalPos()).y();
//      emit MousePos(m->x()/m_canvas->scale(),// + m_doc->minCanvasCoordinate.x(),
//                                m->y()/m_canvas->scale()); // + m_doc->minCanvasCoordinate.y());
        if (commonMouseMove(m))
                return;
       
        if (m_inItemCreation)
        {
                if (GetItem(&currItem))
                {
                        newX = qRound(mousePointDoc.x()); //m_view->translateToDoc(m->x(), m->y()).x());
                        newY = qRound(mousePointDoc.y()); //m_view->translateToDoc(m->x(), m->y()).y());
                       
                        if (m_doc->DragP)
                                return;
                       
                        if (m_doc->appMode == modeDrawBezierLine)
                        {
                                if ((m_doc->SnapGrid) && (m_doc->OnPage(currItem) != -1))
                                {
                                        newX = qRound(newX / m_doc->guidesPrefs().minorGridSpacing) * m_doc->guidesPrefs().minorGridSpacing;
                                        newY = qRound(newY / m_doc->guidesPrefs().minorGridSpacing) * m_doc->guidesPrefs().minorGridSpacing;
                                }
                                m_canvas->newRedrawPolygon() << QPoint(qRound(newX - currItem->xPos()), qRound(newY - currItem->yPos()));
                                m_view->updateCanvas();
                                m_xp = newX;
                                m_yp = newY;
                        }
                }
                else
                {
                        if ((m_mouseButtonPressed) && (m->buttons() & Qt::LeftButton))
                        {
                                newX = qRound(mousePointDoc.x()); //m_view->translateToDoc(m->x(), m->y()).x());
                                newY = qRound(mousePointDoc.y()); //m_view->translateToDoc(m->x(), m->y()).y());
                                QPoint startP = m_canvas->canvasToGlobal(QPointF(m_xp, m_yp));
                                m_view->redrawMarker->setGeometry(QRect(m_view->mapFromGlobal(startP), m_view->mapFromGlobal(m->globalPos())).normalized());
                                m_view->setRedrawMarkerShown(true);
                                m_view->HaveSelRect = true;
                                return;
                        }
                }
        }
}

void BezierMode::mousePressEvent(QMouseEvent *m)
{
        const FPoint mousePointDoc = m_canvas->globalToCanvas(m->globalPos());
       
        int z;
        double Rxp = 0;
        double Ryp = 0;
        double Rxpd = 0;
        double Rypd = 0;
        PageItem *currItem;
        FPoint npf, npf2;
        QTransform pm;

        m_mouseButtonPressed = true;
        m_view->HaveSelRect = false;
        m_doc->DragP = false;
        m_doc->leaveDrag = false;

        m->accept();
        m_view->registerMousePress(m->globalPos());
        m_xp = mousePointDoc.x(); //qRound(m->x()/m_canvas->scale() + 0*m_doc->minCanvasCoordinate.x());
        m_yp = mousePointDoc.y(); //qRound(m->y()/m_canvas->scale() + 0*m_doc->minCanvasCoordinate.y());
        Rxp = m_doc->ApplyGridF(FPoint(m_xp, m_yp)).x();
        Rxpd = m_xp - Rxp;
        m_xp = qRound(Rxp);
        Ryp = m_doc->ApplyGridF(FPoint(m_xp, m_yp)).y();
        Rypd = m_yp - Ryp;
        m_yp = qRound(Ryp);
        if (m->button() == Qt::MidButton)
        {
                m_view->MidButt = true;
                if (m->modifiers() & Qt::ControlModifier)
                        m_view->DrawNew();
                return;
        }
        if (m->button() == Qt::RightButton)
        {
                m_view->stopGesture();
                return;
        }
        if (m_firstPoly)
        {
                selectPage(m);
                undoManager->setUndoEnabled(false);
                z = m_doc->itemAdd(PageItem::PolyLine, PageItem::Unspecified, Rxp, Ryp, 1+Rxpd, 1+Rypd, m_doc->itemToolPrefs().lineWidth, CommonStrings::None, m_doc->itemToolPrefs().lineColor);
                currItem = m_doc->Items->at(z);
                m_doc->m_Selection->clear();
                m_doc->m_Selection->addItem(currItem);
                m_view->setCursor(QCursor(Qt::CrossCursor));
                m_canvas->setRenderModeFillBuffer();
                m_inItemCreation = true;
        }
        currItem = m_doc->m_Selection->itemAt(0);
        pm = currItem->getTransform();
        npf = m_doc->ApplyGridF(mousePointDoc).transformPoint(pm, true);
        currItem->PoLine.addPoint(npf);
        npf2 = getMinClipF(&currItem->PoLine);
        if (npf2.x() < 0)
        {
                currItem->PoLine.translate(-npf2.x(), 0);
                m_doc->moveItem(npf2.x(), 0, currItem);
        }
        if (npf2.y() < 0)
        {
                currItem->PoLine.translate(0, -npf2.y());
                m_doc->moveItem(0, npf2.y(), currItem);
        }
        m_doc->sizeItem(currItem->PoLine.widthHeight().x(), currItem->PoLine.widthHeight().y(), currItem, false, false, false);
        currItem->setPolyClip(qRound(qMax(currItem->lineWidth() / 2, 1.0)));
        m_canvas->newRedrawPolygon();
//      undoManager->setUndoEnabled(false);
}



void BezierMode::mouseReleaseEvent(QMouseEvent *m)
{
        const FPoint mousePointDoc = m_canvas->globalToCanvas(m->globalPos());

        PageItem *currItem;
        m_mouseButtonPressed = false;
        m_canvas->resetRenderMode();
        m->accept();
        m_canvas->setRenderModeUseBuffer(false);
        if ((m_doc->appMode == modeDrawBezierLine) && (m->button() == Qt::LeftButton))
        {
                m_canvas->setRenderModeUseBuffer(true);
                currItem = m_doc->m_Selection->itemAt(0);
                currItem->ClipEdited = true;
                currItem->FrameType = 3;
                QTransform pm = currItem->getTransform();
                FPoint npf = m_doc->ApplyGridF(mousePointDoc).transformPoint(pm, true);
                currItem->PoLine.addPoint(npf);
                bool ssiz = currItem->Sizing;
                currItem->Sizing = true;
                if ((currItem->PoLine.size() % 4 == 0) && (currItem->PoLine.size() > 3))
                {
                        FPoint lxy(currItem->PoLine.point(currItem->PoLine.size()-2));
                        FPoint lk(currItem->PoLine.point(currItem->PoLine.size()-1));
                        double dx = lxy.x() - lk.x();
                        double dy = lxy.y() - lk.y();
                        lk.setX(lk.x() + dx*2);
                        lk.setY(lk.y() + dy*2);
                        currItem->PoLine.addPoint(lxy);
                        currItem->PoLine.addPoint(lk);
                }
                FPoint np2(getMinClipF(&currItem->PoLine));
                if (np2.x() < 0)
                {
                        currItem->PoLine.translate(-np2.x(), 0);
                        m_doc->moveItem(np2.x(), 0, currItem);
                }
                if (np2.y() < 0)
                {
                        currItem->PoLine.translate(0, -np2.y());
                        m_doc->moveItem(0, np2.y(), currItem);
                }
                if (m_firstPoly)
                {
                        m_firstPoly = false;
                        currItem->Sizing = ssiz;
                }
                else
                {
                        m_doc->sizeItem(currItem->PoLine.widthHeight().x(), currItem->PoLine.widthHeight().y(), currItem, false, false, false);
                        m_doc->adjustItemSize(currItem);
                        currItem->Sizing = ssiz;
                        currItem->ContourLine = currItem->PoLine.copy();
                        m_canvas->setRenderModeUseBuffer(false);
                        currItem->update();
                }
                m_canvas->setRenderModeFillBuffer();
                int newX = qRound(mousePointDoc.x()); //m_view->translateToDoc(m->x(), m->y()).x());
                int newY = qRound(mousePointDoc.y()); //m_view->translateToDoc(m->x(), m->y()).y());
                m_canvas->newRedrawPolygon() << QPoint(newX - qRound(currItem->xPos()), newY - qRound(currItem->yPos()));
                m_view->updateCanvas();
        }
        if ((m_doc->appMode == modeDrawBezierLine) && (m->button() == Qt::RightButton))
        {
                undoManager->setUndoEnabled(true);
                currItem = m_doc->m_Selection->itemAt(0);
                if (currItem != nullptr)
                {
                        finalizeItem(currItem);
                }
               
                if (!PrefsManager::instance().appPrefs.uiPrefs.stickyTools)
                {
//                      qApp->changeOverrideCursor(QCursor(Qt::ArrowCursor));
                        m_view->requestMode(modeNormal);
//                      m_view->requestMode(submodePaintingDone);
                }
                else
                        m_view->requestMode(m_doc->appMode);
                m_doc->changed();
//              emit DocChanged();
                m_firstPoly = true;
                m_inItemCreation = false;
                m_canvas->setRenderModeUseBuffer(false);
//              m_view->updateContents();
        }
        m_doc->DragP = false;
        m_doc->leaveDrag = false;
//      m_canvas->m_viewMode.operItemResizing = false;
        m_view->MidButt = false;
//      m_doc->SubMode = -1;
        if (m_view->groupTransactionStarted())
        {
                for (int i = 0; i < m_doc->m_Selection->count(); ++i)
                        m_doc->m_Selection->itemAt(i)->checkChanges(true);
                m_view->endGroupTransaction();
        }

//???   for (int i = 0; i < m_doc->m_Selection->count(); ++i)
//???           m_doc->m_Selection->itemAt(i)->checkChanges(true);

//      //Commit drag created items to undo manager.
//      if (m_doc->m_Selection->itemAt(0)!=nullptr)
//      {
//              m_doc->itemAddCommit(m_doc->m_Selection->itemAt(0)->ItemNr);
//      }
        //Make sure the Zoom spinbox and page selector don't have focus if we click on the canvas
        m_view->m_ScMW->zoomSpinBox->clearFocus();
        m_view->m_ScMW->pageSelector->clearFocus();
        if (m_doc->m_Selection->itemAt(0) != nullptr) // is there the old clip stored for the undo action
        {
                currItem = m_doc->m_Selection->itemAt(0);
                m_doc->nodeEdit.finishTransaction(currItem);
        }
}



void BezierMode::selectPage(QMouseEvent *m)
{
        m_mouseButtonPressed = true;
        FPoint mousePointDoc = m_canvas->globalToCanvas(m->globalPos());
        m_xp = mousePointDoc.x(); //static_cast<int>(m->x()/m_canvas->scale());
        m_yp = mousePointDoc.y(); //static_cast<int>(m->y()/m_canvas->scale());
        m_doc->nodeEdit.deselect();
        m_view->deselectItems(false);

        if (m_doc->masterPageMode())
                return;

        int i = m_doc->OnPage(m_xp, m_yp);
        if (i < 0)
                return;

        uint docCurrPageNo = m_doc->currentPageNumber();
        uint j = static_cast<uint>(i);
        if (docCurrPageNo != j)
        {
                m_doc->setCurrentPage(m_doc->Pages->at(j));
                m_view->m_ScMW->slotSetCurrentPage(j);
                m_view->DrawNew();
        }
}