#include "lrpreviewreportwidget.h"
#include "ui_lrpreviewreportwidget.h"

#include "lrexportersfactory.h"
#include "lrpagedesignintf.h"
#include "lrpreparedpages.h"
#include "lrpreviewreportwidget_p.h"
#include "lrreportengine_p.h"
#include "lrreportrender.h"
#include "serializators/lrxmlwriter.h"

#include <QFileDialog>
#include <QPrintDialog>
#include <QPrinter>
#include <QPrinterInfo>
#include <QScrollBar>

namespace LimeReport {

bool PreviewReportWidgetPrivate::pageIsVisible()
{
    QGraphicsView* view = q_ptr->ui->graphicsView;
    if (m_currentPage - 1 >= m_reportPages.size() || m_currentPage <= 0)
        return false;
    PageItemDesignIntf::Ptr page = m_reportPages.at(m_currentPage - 1);
    return page->mapToScene(page->rect())
        .boundingRect()
        .intersects(view->mapToScene(view->viewport()->geometry()).boundingRect());
}

QRectF PreviewReportWidgetPrivate::calcPageShift()
{
    QGraphicsView* view = q_ptr->ui->graphicsView;
    PageItemDesignIntf::Ptr page = m_reportPages.at(m_currentPage - 1);
    qreal pageHeight = page->mapToScene(page->boundingRect()).boundingRect().height();
    qreal viewHeight
        = view->mapToScene(0, view->viewport()->height()).y() - view->mapToScene(0, 0).y();
    viewHeight = (pageHeight < viewHeight) ? pageHeight : viewHeight;
    QRectF pageStartPos = m_reportPages.at(m_currentPage - 1)
                              ->mapRectToScene(m_reportPages.at(m_currentPage - 1)->rect());
    return QRectF(0, pageStartPos.y(), 0, viewHeight);
}

void PreviewReportWidgetPrivate::setPages(ReportPages pages)
{
    m_reportPages = pages;
    if (!m_reportPages.isEmpty()) {
        m_previewPage->setPageItems(m_reportPages);
        m_changingPage = true;
        m_currentPage = 1;
        if (pages.at(0))
            pages.at(0)->setSelected(true);
        m_changingPage = false;
        q_ptr->initPreview();
        q_ptr->emitPageSet();
        q_ptr->activateCurrentPage();
    }
}

PageItemDesignIntf::Ptr PreviewReportWidgetPrivate::currentPage()
{
    if (m_reportPages.count() > 0 && m_reportPages.count() >= m_currentPage && m_currentPage > 0)
        return m_reportPages.at(m_currentPage - 1);
    else
        return PageItemDesignIntf::Ptr(0);
}

QList<QString> PreviewReportWidgetPrivate::aviableExporters()
{
    return ExportersFactory::instance().map().keys();
}

void PreviewReportWidgetPrivate::startInsertTextItem()
{
    m_previewPage->startInsertMode("TextItem");
}

void PreviewReportWidgetPrivate::activateItemSelectionMode() { m_previewPage->startEditMode(); }

void PreviewReportWidgetPrivate::deleteSelectedItems() { m_previewPage->deleteSelected(); }

PreviewReportWidget::PreviewReportWidget(ReportEngine* report, QWidget* parent):
    QWidget(parent),
    ui(new Ui::PreviewReportWidget),
    d_ptr(new PreviewReportWidgetPrivate(this)),
    m_scaleType(FitWidth),
    m_scalePercent(0),
    m_previewPageBackgroundColor(Qt::white),
    m_defaultPrinter(0),
    m_scaleChanging(false)
{
    ui->setupUi(this);
    d_ptr->m_report = report->d_ptr;
    d_ptr->m_previewPage = d_ptr->m_report->createPreviewPage();
    d_ptr->m_previewPage->setItemMode(LimeReport::PreviewMode);
    m_resizeTimer.setSingleShot(true);

    ui->errorsView->setVisible(false);
    connect(ui->graphicsView->verticalScrollBar(), SIGNAL(valueChanged(int)), this,
            SLOT(slotSliderMoved(int)));
    connect(d_ptr->m_report, SIGNAL(destroyed(QObject*)), this,
            SLOT(reportEngineDestroyed(QObject*)));
    d_ptr->m_zoomer = new GraphicsViewZoomer(ui->graphicsView);
    connect(d_ptr->m_zoomer, SIGNAL(zoomed(double)), this, SLOT(slotZoomed(double)));
    connect(&m_resizeTimer, SIGNAL(timeout()), this, SLOT(resizeDone()));
}

PreviewReportWidget::~PreviewReportWidget()
{
    delete d_ptr->m_previewPage;
    d_ptr->m_previewPage = 0;
    delete d_ptr->m_zoomer;
    delete d_ptr;
    delete ui;
}

QList<QString> PreviewReportWidget::aviableExporters() { return d_ptr->aviableExporters(); }

bool PreviewReportWidget::exportReport(QString exporterName, const QMap<QString, QVariant>& params)
{
    if (ExportersFactory::instance().map().contains(exporterName)) {

        ReportExporterInterface* e
            = ExportersFactory::instance().objectCreator(exporterName)(d_ptr->m_report);
        QString defaultFileName
            = d_ptr->m_report->defaultExportDir() + d_ptr->m_report->reportName().split(".")[0];
        QString filter = QString("%1 (*.%2)").arg(e->exporterName()).arg(e->exporterFileExt());
        QString fileName = QFileDialog::getSaveFileName(
            this, tr("%1 file name").arg(e->exporterName()), defaultFileName, filter);
        if (!fileName.isEmpty()) {
            QFileInfo fi(fileName);
            if (fi.suffix().isEmpty())
                fileName += QString(".%1").arg(e->exporterFileExt());
            bool result = e->exportPages(d_ptr->m_reportPages, fileName, params);
            delete e;
            return result;
        }
    }
    return false;
}

void PreviewReportWidget::initPreview()
{
    if (ui->graphicsView->scene() != d_ptr->m_previewPage)
        ui->graphicsView->setScene(d_ptr->m_previewPage);
#if (QT_VERSION < QT_VERSION_CHECK(5, 15, 1))
    ui->graphicsView->resetMatrix();
#else
    ui->graphicsView->resetTransform();
#endif
    ui->graphicsView->centerOn(0, 0);
    ui->graphicsView->scene()->setBackgroundBrush(QColor(m_previewPageBackgroundColor));
    setScalePercent(d_ptr->m_scalePercent);
    PageDesignIntf* page = dynamic_cast<PageDesignIntf*>(ui->graphicsView->scene());
    if (page)
        connect(page, SIGNAL(itemInserted(LimeReport::PageDesignIntf*, QPointF, QString)), this,
                SIGNAL(itemInserted(LimeReport::PageDesignIntf*, QPointF, QString)));
}

void PreviewReportWidget::setErrorsMesagesVisible(bool visible)
{
    ui->errorsView->setVisible(visible);
}

void PreviewReportWidget::zoomIn()
{
    d_ptr->m_scalePercent = (d_ptr->m_scalePercent / 10) * 10 + 10;
    setScalePercent(d_ptr->m_scalePercent);
}

void PreviewReportWidget::zoomOut()
{
    if (d_ptr->m_scalePercent > 0)
        d_ptr->m_scalePercent = (d_ptr->m_scalePercent / 10) * 10 - 10;
    setScalePercent(d_ptr->m_scalePercent);
}

void PreviewReportWidget::firstPage()
{
    d_ptr->m_changingPage = true;
    if ((!d_ptr->m_reportPages.isEmpty()) && (d_ptr->m_currentPage > 1)) {
        d_ptr->m_currentPage = 1;
        ui->graphicsView->ensureVisible(d_ptr->calcPageShift(), 0, 0);
        emit pageChanged(d_ptr->m_currentPage);
        activateCurrentPage();
    }
    d_ptr->m_changingPage = false;
}

void PreviewReportWidget::priorPage()
{
    d_ptr->m_changingPage = true;
    if ((!d_ptr->m_reportPages.isEmpty()) && (d_ptr->m_currentPage > 1)) {
        d_ptr->m_currentPage--;
        ui->graphicsView->ensureVisible(d_ptr->calcPageShift(), 0, 0);
        emit pageChanged(d_ptr->m_currentPage);
        activateCurrentPage();
    }
    d_ptr->m_changingPage = false;
}

void PreviewReportWidget::nextPage()
{
    d_ptr->m_changingPage = true;
    if ((!d_ptr->m_reportPages.isEmpty())
        && (d_ptr->m_reportPages.count() > (d_ptr->m_currentPage))) {
        d_ptr->m_currentPage++;
        ui->graphicsView->ensureVisible(d_ptr->calcPageShift(), 0, 0);
        emit pageChanged(d_ptr->m_currentPage);
        activateCurrentPage();
    }
    d_ptr->m_changingPage = false;
}

void PreviewReportWidget::lastPage()
{
    d_ptr->m_changingPage = true;
    if ((!d_ptr->m_reportPages.isEmpty())
        && (d_ptr->m_reportPages.count() > (d_ptr->m_currentPage))) {
        d_ptr->m_currentPage = d_ptr->m_reportPages.count();
        ui->graphicsView->ensureVisible(d_ptr->calcPageShift(), 0, 0);
        emit pageChanged(d_ptr->m_currentPage);
        activateCurrentPage();
    }
    d_ptr->m_changingPage = false;
}

void PreviewReportWidget::printPages(QPrinter* printer)
{
    if (!d_ptr->m_reportPages.isEmpty())
        d_ptr->m_report->printPages(d_ptr->m_reportPages, printer);
    foreach (PageItemDesignIntf::Ptr pageItem, d_ptr->m_reportPages) {
        d_ptr->m_previewPage->reactivatePageItem(pageItem);
    }
}

void PreviewReportWidget::print()
{
    QPrinterInfo pi;
    QPrinter lp(QPrinter::HighResolution);

    if (!pi.defaultPrinter().isNull()) {
#if QT_VERSION >= 0x050300
        lp.setPrinterName(pi.defaultPrinterName());
#else
        lp.setPrinterName(pi.defaultPrinter().printerName());
#endif
    }

    QPrinter* printer = m_defaultPrinter ? m_defaultPrinter : &lp;

    QPrintDialog dialog(printer, QApplication::activeWindow());
    if (dialog.exec() == QDialog::Accepted) {
        printPages(printer);
    }
}

void PreviewReportWidget::printToPDF()
{
    if (!d_ptr->m_reportPages.isEmpty()) {
        exportReport("PDF");
        foreach (PageItemDesignIntf::Ptr pageItem, d_ptr->m_reportPages) {
            d_ptr->m_previewPage->reactivatePageItem(pageItem);
        }
    }
}

void PreviewReportWidget::pageNavigatorChanged(int value)
{
    if (d_ptr->m_changingPage)
        return;
    d_ptr->m_changingPage = true;
    if ((!d_ptr->m_reportPages.isEmpty()) && (d_ptr->m_reportPages.count() >= value) && value > 0) {
        d_ptr->m_currentPage = value;
        activateCurrentPage();
        ui->graphicsView->ensureVisible(d_ptr->calcPageShift(), 0, 0);
    }
    d_ptr->m_changingPage = false;
}

void PreviewReportWidget::saveToFile()
{
    bool saved = false;
    PreparedPages pagesManager = PreparedPages(&d_ptr->m_reportPages);
    emit onSave(saved, &pagesManager);
    if (!saved) {
        QString fileName = QFileDialog::getSaveFileName(this, tr("Report file name"),
                                                        d_ptr->m_report->defaultExportDir());
        if (!fileName.isEmpty()) {
            QScopedPointer<ItemsWriterIntf> writer(new XMLWriter());
            foreach (PageItemDesignIntf::Ptr page, d_ptr->m_reportPages) {
                writer->putItem(page.data());
            }
            writer->saveToFile(fileName);
        }
    }
}

void PreviewReportWidget::setScalePercent(int percent)
{
    m_scaleChanging = true;
#if (QT_VERSION < QT_VERSION_CHECK(5, 15, 1))
    ui->graphicsView->resetMatrix();
#else
    ui->graphicsView->resetTransform();
#endif
    d_ptr->m_scalePercent = percent;
    qreal scaleSize = percent / 100.0;
    ui->graphicsView->scale(scaleSize, scaleSize);
    emit scalePercentChanged(percent);
    if (percent == 100) {
        m_scaleType = OneToOne;
    } else {
        m_scaleType = Percents;
        m_scalePercent = percent;
    }
    m_scaleChanging = false;
}

void PreviewReportWidget::fitWidth()
{
    if (d_ptr->currentPage()) {
        resize(m_scaleType = FitWidth);
    }
}

void PreviewReportWidget::fitPage()
{
    if (d_ptr->currentPage()) {
        resize(m_scaleType = FitPage);
    }
}

void PreviewReportWidget::resizeEvent(QResizeEvent*) { m_resizeTimer.start(100); }

void PreviewReportWidget::setErrorMessages(const QStringList& value)
{
    foreach (QString line, value) {
        ui->errorsView->append(line);
    }
}

void PreviewReportWidget::emitPageSet() { emit pagesSet(d_ptr->m_reportPages.count()); }

QPrinter* PreviewReportWidget::defaultPrinter() const { return m_defaultPrinter; }

void PreviewReportWidget::setDefaultPrinter(QPrinter* defaultPrinter)
{
    m_defaultPrinter = defaultPrinter;
}

ScaleType PreviewReportWidget::scaleType() const { return m_scaleType; }

void PreviewReportWidget::startInsertTextItem() { d_ptr->startInsertTextItem(); }

void PreviewReportWidget::activateItemSelectionMode() { d_ptr->activateItemSelectionMode(); }

void PreviewReportWidget::deleteSelectedItems() { d_ptr->deleteSelectedItems(); }

int PreviewReportWidget::scalePercent() const { return m_scalePercent; }

void PreviewReportWidget::setScaleType(const ScaleType& scaleType, int percent)
{
    m_scaleType = scaleType;
    m_scalePercent = percent;
}

void PreviewReportWidget::setPreviewPageBackgroundColor(QColor color)
{
    m_previewPageBackgroundColor = color;
}

QColor PreviewReportWidget::previewPageBackgroundColor() { return m_previewPageBackgroundColor; }

void PreviewReportWidget::refreshPages()
{
    if (d_ptr->m_report) {
        try {
            d_ptr->m_report->dataManager()->setDesignTime(false);
            ReportPages pages = d_ptr->m_report->renderToPages();
            d_ptr->m_report->dataManager()->setDesignTime(true);
            if (pages.count() > 0) {
                d_ptr->setPages(pages);
            }
        } catch (ReportError& exception) {
            d_ptr->m_report->saveError(exception.what());
            d_ptr->m_report->showError(exception.what());
        }
    }
}

void PreviewReportWidget::activateCurrentPage()
{
    PageDesignIntf* page = dynamic_cast<PageDesignIntf*>(ui->graphicsView->scene());
    if (page)
        page->setCurrentPage(d_ptr->currentPage().data());
}

void PreviewReportWidget::resize(ScaleType scaleType, int percent)
{
    switch (scaleType) {
    case FitWidth:
        setScalePercent(ui->graphicsView->viewport()->width() / ui->graphicsView->scene()->width()
                        * 100);
        break;
    case FitPage:
        setScalePercent(
            qMin(ui->graphicsView->viewport()->width() / ui->graphicsView->scene()->width(),
                 ui->graphicsView->viewport()->height() / d_ptr->currentPage()->height())
            * 100);
        break;
    case OneToOne:
        setScalePercent(100);
        break;
    case Percents:
        setScalePercent(percent);
        break;
    }
}

void PreviewReportWidget::slotSliderMoved(int value)
{
    if (m_scaleChanging)
        return;
    int curPage = d_ptr->m_currentPage;
    if (ui->graphicsView->verticalScrollBar()->minimum() == value) {
        d_ptr->m_currentPage = 1;
    } else if (ui->graphicsView->verticalScrollBar()->maximum() == value) {
        d_ptr->m_currentPage = d_ptr->m_reportPages.count();
    }

    if (!d_ptr->pageIsVisible()) {
        if (value > d_ptr->m_priorScrolValue) {
            d_ptr->m_currentPage++;
        } else {
            d_ptr->m_currentPage--;
        }
    }

    if (curPage != d_ptr->m_currentPage) {
        d_ptr->m_changingPage = true;
        emit pageChanged(d_ptr->m_currentPage);
        activateCurrentPage();
        d_ptr->m_changingPage = false;
    }

    d_ptr->m_priorScrolValue = value;
}

void PreviewReportWidget::reportEngineDestroyed(QObject* object)
{
    if (object == d_ptr->m_report) {
        d_ptr->m_report = 0;
    }
}

void PreviewReportWidget::slotZoomed(double)
{
#if (QT_VERSION < QT_VERSION_CHECK(5, 15, 0))
    d_ptr->m_scalePercent = ui->graphicsView->matrix().m11() * 100;
#else
    d_ptr->m_scalePercent = ui->graphicsView->transform().m11() * 100;
#endif
    emit scalePercentChanged(d_ptr->m_scalePercent);
}

void PreviewReportWidget::resizeDone()
{
    switch (m_scaleType) {
    case FitPage:
        fitPage();
        break;
    case FitWidth:
        fitWidth();
        break;
    case OneToOne:
        setScalePercent(100);
        break;
    case Percents:
        setScalePercent(m_scalePercent);
        break;
    }
}

} // namespace LimeReport