/***************************************************************************
 *   This file is part of the Lime Report project                          *
 *   Copyright (C) 2015 by Alexander Arin                                  *
 *   arin_a@bk.ru                                                          *
 *                                                                         *
 **                   GNU General Public License Usage                    **
 *                                                                         *
 *   This library 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 3 of the License, or     *
 *   (at your option) any later version.                                   *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program.  If not, see <http://www.gnu.org/licenses/>. *
 *                                                                         *
 **                  GNU Lesser General Public License                    **
 *                                                                         *
 *   This library is free software: you can redistribute it and/or modify  *
 *   it under the terms of the GNU Lesser General Public License as        *
 *   published by the Free Software Foundation, either version 3 of the    *
 *   License, or (at your option) any later version.                       *
 *   You should have received a copy of the GNU Lesser General Public      *
 *   License along with this library.                                      *
 *   If not, see <http://www.gnu.org/licenses/>.                           *
 *                                                                         *
 *   This library 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.                          *
 ****************************************************************************/
#include "lrreportdesignwidget.h"
#include "serializators/lrxmlreader.h"
#include "serializators/lrxmlwriter.h"
#include "lrreportengine_p.h"
#include "lrbasedesignintf.h"
#include "lrsettingdialog.h"

#include <QDebug>
#include <QObject>
#include <QDockWidget>
#include <QtXml>
#include <QVBoxLayout>
#include <QFileDialog>
#include <QApplication>
#include <QTabWidget>
#include <QMessageBox>

namespace LimeReport {

// ReportDesignIntf

ReportDesignWidget::ReportDesignWidget(ReportEnginePrivate *report, QMainWindow *mainWindow, QWidget *parent) :
    QWidget(parent), m_mainWindow(mainWindow), m_verticalGridStep(10), m_horizontalGridStep(10), m_useGrid(false)
{
    m_tabWidget = new QTabWidget(this);
    m_tabWidget->setTabPosition(QTabWidget::South);
    QVBoxLayout* mainLayout = new QVBoxLayout(this);
    mainLayout->addWidget(m_tabWidget);
    setLayout(mainLayout);

    if (!report) {
        m_report=new ReportEnginePrivate(this);
        m_report->setObjectName("report");
        m_report->appendPage("page1");
    }
    else {
        m_report=report;
        if (!m_report->pageCount()) m_report->appendPage("page1");
    }

    createTabs();

    connect(m_report,SIGNAL(pagesLoadFinished()),this,SLOT(slotPagesLoadFinished()));
    connect(m_report,SIGNAL(cleared()),this,SIGNAL(cleared()));
    connect(m_tabWidget, SIGNAL(currentChanged(int)), this, SLOT(slotCurrentTabChanged(int)));

    //m_instance=this;
    m_scriptEditor->setPlainText(report->scriptContext()->initScript());
    m_zoomer = new GraphicsViewZoomer(activeView());
#ifdef Q_OS_WIN
    m_defaultFont = QFont("Arial",10);
#endif
}

bool ReportDesignWidget::useMagnet() const
{
    return m_useMagnet;
}

void ReportDesignWidget::setUseMagnet(bool useMagnet)
{
    m_useMagnet = useMagnet;
    for (int i=0;i<m_report->pageCount();++i){
        m_report->pageAt(i)->setMagneticMovement(useMagnet);
    }
}

void ReportDesignWidget::saveState(QSettings* settings)
{
    settings->beginGroup("DesignerWidget");
    settings->setValue("hGridStep",m_horizontalGridStep);
    settings->setValue("vGridStep",m_verticalGridStep);
    settings->setValue("defaultFont",m_defaultFont);
    settings->setValue("useGrid",m_useGrid);
    settings->endGroup();
}

void ReportDesignWidget::applySettings()
{
    for (int i=0;i<m_report->pageCount();++i){
        m_report->pageAt(i)->pageItem()->setFont(m_defaultFont);
    }
    applyUseGrid();
}

void ReportDesignWidget::loadState(QSettings* settings)
{
    settings->beginGroup("DesignerWidget");
    QVariant v = settings->value("hGridStep");
    if (v.isValid()){
        m_horizontalGridStep = v.toInt();
    }

    v = settings->value("vGridStep");
    if (v.isValid()){
        m_verticalGridStep = v.toInt();
    }
    v = settings->value("defaultFont");
    if (v.isValid()){
        m_defaultFont = v.value<QFont>();
    }

    v = settings->value("useGrid");
    if (v.isValid()){
        m_useGrid = v.toBool();
    }
    settings->endGroup();
    applySettings();
}


void ReportDesignWidget::createTabs(){
    for (int i = 0; i<m_report->pageCount();++i){
        QGraphicsView* view = new QGraphicsView(qobject_cast<QWidget*>(this));
        view->setBackgroundBrush(QBrush(Qt::gray));
        view->setFrameShape(QFrame::NoFrame);
        view->setScene(m_report->pageAt(i));

        foreach(QGraphicsItem* item, m_report->pageAt(i)->selectedItems()){
            item->setSelected(false);
        }

        view->centerOn(0,0);
        view->scale(0.5,0.5);
        connectPage(m_report->pageAt(i));
        m_tabWidget->addTab(view,QIcon(),tr("Page")+QString::number(i+1));
    }
    m_scriptEditor = new QTextEdit(this);
    m_tabWidget->addTab(m_scriptEditor,QIcon(),tr("Script"));
    m_tabWidget->setCurrentIndex(0);
}

ReportDesignWidget::~ReportDesignWidget()
{
    delete m_zoomer;
}

QGraphicsView* ReportDesignWidget::activeView(){
    return dynamic_cast<QGraphicsView*>(m_tabWidget->currentWidget());
}

void ReportDesignWidget::connectPage(PageDesignIntf *page)
{
    connect(page,SIGNAL(itemInserted(LimeReport::PageDesignIntf*,QPointF,QString)),this,SIGNAL(itemInserted(LimeReport::PageDesignIntf*,QPointF,QString)));
    connect(page,SIGNAL(itemInsertCanceled(QString)),this,SIGNAL(itemInsertCanceled(QString)));
    connect(page,SIGNAL(itemPropertyChanged(QString,QString,QVariant,QVariant)),this,SIGNAL(itemPropertyChanged(QString,QString,QVariant,QVariant)));
    connect(page,SIGNAL(selectionChanged()),this,SLOT(slotSelectionChanged()));
    connect(page,SIGNAL(insertModeStarted()),this,SIGNAL(insertModeStarted()));
    connect(page,SIGNAL(commandHistoryChanged()),this,SIGNAL(commandHistoryChanged()));
    connect(page,SIGNAL(sceneRectChanged(QRectF)),this,SLOT(slotSceneRectChanged(QRectF)));

    connect(page,SIGNAL(itemAdded(LimeReport::PageDesignIntf*,LimeReport::BaseDesignIntf*)),
            this, SIGNAL(itemAdded(LimeReport::PageDesignIntf*,LimeReport::BaseDesignIntf*)));
    connect(page,SIGNAL(itemRemoved(LimeReport::PageDesignIntf*,LimeReport::BaseDesignIntf*)),
            this,SIGNAL(itemDeleted(LimeReport::PageDesignIntf*,LimeReport::BaseDesignIntf*)));
    connect(page,SIGNAL(bandAdded(LimeReport::PageDesignIntf*,LimeReport::BandDesignIntf*)),
            this, SIGNAL(bandAdded(LimeReport::PageDesignIntf*,LimeReport::BandDesignIntf*)));
    connect(page, SIGNAL(bandRemoved(LimeReport::PageDesignIntf*,LimeReport::BandDesignIntf*)),
            this, SIGNAL(bandDeleted(LimeReport::PageDesignIntf*,LimeReport::BandDesignIntf*)));
    connect(page, SIGNAL(pageUpdateFinished(LimeReport::PageDesignIntf*)),
            this, SIGNAL(activePageUpdated(LimeReport::PageDesignIntf*)));

    //activeView()->centerOn(0,0);
    emit activePageChanged();
}

void ReportDesignWidget::createStartPage()
{
    m_report->appendPage("page1");
    createTabs();
}

void ReportDesignWidget::removeDatasource(const QString &datasourceName)
{
    if (m_report->dataManager())
        m_report->dataManager()->removeDatasource(datasourceName);
}

void ReportDesignWidget::addBand(const QString &bandType)
{
    if (activePage())
        activePage()->addBand(bandType);
}

void ReportDesignWidget::addBand(BandDesignIntf::BandsType bandType)
{
    if (activePage())
        activePage()->addBand(bandType);
}

void ReportDesignWidget::startInsertMode(const QString &itemType)
{
    if (activePage())
        activePage()->startInsertMode(itemType);
}

void ReportDesignWidget::startEditMode()
{
    if (activePage())
        activePage()->startEditMode();
}

PageDesignIntf * ReportDesignWidget::activePage()
{
    if (activeView())
        return qobject_cast<PageDesignIntf*>(activeView()->scene());
    return 0;
}

QList<QGraphicsItem *> ReportDesignWidget::selectedItems(){
    return activePage()->selectedItems();
}

void ReportDesignWidget::deleteItem(QGraphicsItem *item){
    activePage()->removeReportItem(dynamic_cast<BaseDesignIntf*>(item));
}

void ReportDesignWidget::deleteSelectedItems(){
    activePage()->deleteSelected();
}

QStringList ReportDesignWidget::datasourcesNames(){
    return m_report->dataManager()->dataSourceNames();
}

void ReportDesignWidget::slotItemSelected(BaseDesignIntf *item){
    emit itemSelected(item);
}

void ReportDesignWidget::saveToFile(const QString &fileName){
    m_report->scriptContext()->setInitScript(m_scriptEditor->toPlainText());
    if (m_report->saveToFile(fileName)) {
            m_report->emitSaveFinished();
    }
}

bool ReportDesignWidget::save()
{
    m_report->scriptContext()->setInitScript(m_scriptEditor->toPlainText());
    if (!m_report->reportFileName().isEmpty()){
        if (m_report->saveToFile()){
            m_report->emitSaveFinished();
            return true;
        }
    }
    else {
        m_report->emitSaveReport();
        if (m_report->isSaved()) {
            m_report->emitSaveFinished();
            return true;
        }
        if (m_report->saveToFile(QFileDialog::getSaveFileName(this,tr("Report file name"),"","Report files (*.lrxml);; All files (*)"))){
            m_report->emitSaveFinished();
            return true;
        };
    }
    return false;
}

bool ReportDesignWidget::loadFromFile(const QString &fileName)
{
    if (m_report->loadFromFile(fileName)){
        createTabs();
        //connectPage(m_report->pageAt(0));
        m_scriptEditor->setPlainText(m_report->scriptContext()->initScript());
        emit loaded();
        return true;
    } else {
        QMessageBox::critical(this,tr("Error"),tr("Wrong file format"));
        return false;
    }
}

void ReportDesignWidget::scale(qreal sx, qreal sy)
{
    //m_view->scale(sx,sy);
    if (activeView()) activeView()->scale(sx,sy);
}

QString ReportDesignWidget::reportFileName()
{
    if (m_report)
        return m_report->reportFileName();
    return QString();
}

bool ReportDesignWidget::isNeedToSave()
{
    if(m_report)
        return m_report->isNeedToSave();
    return false;
}

bool ReportDesignWidget::emitLoadReport()
{
    return m_report->emitLoadReport();
}

void ReportDesignWidget::updateSize()
{
    if (activePage())
        activePage()->slotUpdateItemSize();
}

void ReportDesignWidget::undo()
{
    if (activePage())
        activePage()->undo();
}

void ReportDesignWidget::redo()
{
    if (activePage())
        activePage()->redo();
}

void ReportDesignWidget::copy()
{
    if (activePage())
        activePage()->copy();
}

void ReportDesignWidget::paste()
{
    if (activePage())
        activePage()->paste();
}

void ReportDesignWidget::cut()
{
    if (activePage())
        activePage()->cut();
}

void ReportDesignWidget::brinToFront()
{
    if (activePage())
        activePage()->bringToFront();
}

void ReportDesignWidget::sendToBack()
{
    if (activePage())
        activePage()->sendToBack();
}

void ReportDesignWidget::alignToLeft()
{
    if (activePage())
        activePage()->alignToLeft();
}

void ReportDesignWidget::alignToRight()
{
    if (activePage())
        activePage()->alignToRigth();
}

void ReportDesignWidget::alignToVCenter()
{
    if (activePage())
        activePage()->alignToVCenter();
}

void ReportDesignWidget::alignToTop()
{
    if (activePage())
        activePage()->alignToTop();
}

void ReportDesignWidget::alignToBottom()
{
    if (activePage())
        activePage()->alignToBottom();
}

void ReportDesignWidget::alignToHCenter()
{
    if (activePage())
        activePage()->alignToHCenter();
}

void ReportDesignWidget::sameHeight()
{
    if (activePage())
        activePage()->sameHeight();
}

void ReportDesignWidget::sameWidth()
{
    if (activePage())
        activePage()->sameWidth();
}

void ReportDesignWidget::editLayoutMode(bool value)
{
    if (value ){
        activePage()->pageItem()->setItemMode(activePage()->pageItem()->itemMode() | LayoutEditMode);
    } else if (activePage()->pageItem()->itemMode() & LayoutEditMode){
        activePage()->pageItem()->setItemMode(activePage()->pageItem()->itemMode() ^ LayoutEditMode);
    }
}

void ReportDesignWidget::addHLayout()
{
    if (activePage())
        activePage()->addHLayout();
}

void ReportDesignWidget::setFont(const QFont& font)
{
    if (activePage())
        activePage()->setFont(font);
}

void ReportDesignWidget::setTextAlign(const bool& horizontalAlign, const Qt::AlignmentFlag& alignment)
{
    if (activePage())
        activePage()->changeSelectedGrpoupTextAlignPropperty(horizontalAlign, alignment);
}

void ReportDesignWidget::setBorders(const BaseDesignIntf::BorderLines& borders)
{
    if (activePage())
        activePage()->setBorders(borders);
}

void ReportDesignWidget::previewReport()
{
    report()->scriptContext()->setInitScript(m_scriptEditor->toPlainText());
    report()->previewReport();
}

void ReportDesignWidget::printReport()
{
    report()->scriptContext()->setInitScript(m_scriptEditor->toPlainText());
    setCursor(Qt::WaitCursor);
    report()->printReport();
    setCursor(Qt::ArrowCursor);
}

void ReportDesignWidget::addPage()
{
    QGraphicsView* view = new QGraphicsView(qobject_cast<QWidget*>(this));
    view->setBackgroundBrush(QBrush(Qt::gray));
    view->setFrameShape(QFrame::NoFrame);
    PageDesignIntf* page = m_report->appendPage("page"+QString::number(m_report->pageCount()+1));
    view->setScene(page);
    int index = m_report->pageCount()-1;
    m_tabWidget->insertTab(index,view,QIcon(),tr("Page")+QString::number(m_report->pageCount()));
    m_tabWidget->setCurrentIndex(index);
    connectPage(page);
    view->scale(0.5,0.5);
    view->centerOn(0,0);
    emit pageAdded(page);
}

void ReportDesignWidget::deleteCurrentPage()
{
    if (m_report->pageCount()>1){
        QGraphicsView* view = dynamic_cast<QGraphicsView*>(m_tabWidget->currentWidget());
        if (view){
            PageDesignIntf* page = dynamic_cast<PageDesignIntf*>(view->scene());
            if (page){
                if (m_report->deletePage(page)){
                    int index = m_tabWidget->currentIndex();
                    m_tabWidget->removeTab(m_tabWidget->currentIndex());
                    if (index>0) m_tabWidget->setCurrentIndex(index-1);
                    emit pageDeleted();
                }
            }
        }
    }
}

void ReportDesignWidget::editSetting()
{
    SettingDialog setting(this);
    setting.setVerticalGridStep(m_verticalGridStep);
    setting.setHorizontalGridStep(m_horizontalGridStep);
    setting.setDefaultFont(m_defaultFont);
    setting.setSuppressAbsentFieldsAndVarsWarnings(m_report->suppressFieldAndVarError());

    if (setting.exec()){
        m_horizontalGridStep = setting.horizontalGridStep();
        m_verticalGridStep = setting.verticalGridStep();
        m_defaultFont = setting.defaultFont();
        m_report->setSuppressFieldAndVarError(setting.suppressAbsentFieldsAndVarsWarnings());
        applySettings();
    }
}

void ReportDesignWidget::applyUseGrid()
{
    int hGridStep = m_useGrid?m_horizontalGridStep:2;
    int vGridStep = m_useGrid?m_verticalGridStep:2;
    for(int i=0;i<m_report->pageCount();++i){
       m_report->pageAt(i)->setVerticalGridStep(hGridStep);
       m_report->pageAt(i)->setHorizontalGridStep(vGridStep);
    }
}

void ReportDesignWidget::setUseGrid(bool value)
{
    m_useGrid = value;
    applyUseGrid();
}

bool ReportDesignWidget::isCanUndo()
{
    if (activePage())
        return activePage()->isCanUndo();
    return false;
}

bool ReportDesignWidget::isCanRedo()
{
    if (activePage())
        return activePage()->isCanRedo();
    return false;
}

void ReportDesignWidget::slotSelectionChanged()
{
    QGraphicsScene* page=dynamic_cast<QGraphicsScene*>(sender());
    if (page){
        if (page->selectedItems().count()==1){
            BaseDesignIntf* item = dynamic_cast<BaseDesignIntf*>(page->selectedItems().at(0));
            if (item)
              emit (itemSelected(item));
        }
        else if (page->selectedItems().count()>1){
            emit (multiItemSelected());
        }
    }
}

DataSourceManager* ReportDesignWidget::dataManager()
{
    return m_report->dataManager();
}

ScriptEngineManager* ReportDesignWidget::scriptManager()
{
    return m_report->scriptManager();
}

ScriptEngineContext*ReportDesignWidget::scriptContext()
{
    return m_report->scriptContext();
}

void ReportDesignWidget::slotPagesLoadFinished()
{
    applySettings();
    //setActivePage(m_report->pageAt(0));
    emit loaded();
}

void ReportDesignWidget::slotDatasourceCollectionLoaded(const QString & /*collectionName*/)
{
}

void ReportDesignWidget::slotSceneRectChanged(QRectF)
{
    if (activeView()) activeView()->centerOn(0,0);
}

void ReportDesignWidget::slotCurrentTabChanged(int index)
{
    QGraphicsView* view = dynamic_cast<QGraphicsView*>(m_tabWidget->widget(index));
    if (view) {
        if (view->scene()){
            foreach (QGraphicsItem* item, view->scene()->selectedItems()) item->setSelected(false);
        }
        m_zoomer->setView(view);
    }
    emit activePageChanged();
}

bool ReportDesignWidget::eventFilter(QObject *target, QEvent *event)
{
    if (event->type() == QEvent::Wheel){
        QWheelEvent* we = dynamic_cast<QWheelEvent*>(event);
        if (QApplication::keyboardModifiers()==Qt::ControlModifier){
            if(we->delta()<0) scale(1.2,1.2);
            else scale(1/1.2,1/1.2);
        }
    }
    return QWidget::eventFilter(target,event);
}

void ReportDesignWidget::clear()
{
    m_report->clearReport();
    m_tabWidget->clear();
    m_report->setReportFileName("");
    m_report->scriptContext()->setInitScript("");
    m_scriptEditor->setPlainText("");
}

}