/***************************************************************************
 *   This file is part of the Lime Report project                          *
 *   Copyright (C) 2021 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.                          *
 ****************************************************************************/
#ifndef LRREPORTRENDER_H
#define LRREPORTRENDER_H
#include "lrcollection.h"
#include "lrdatasourcemanager.h"
#include "lrpageitemdesignintf.h"
#include "lrscriptenginemanager.h"
#include "serializators/lrstorageintf.h"

#include <QObject>

namespace LimeReport {

class PageDesignIntf;
class BandDesignIntf;
class ContentItemDesignIntf;

class GroupBandsHolder: public QList<BandDesignIntf*> {
public:
    GroupBandsHolder(bool tryToKeepTogether):
        QList<BandDesignIntf*>(),
        m_tryToKeepTogether(tryToKeepTogether),
        m_dataGroup(true),
        m_footerGroup(false)
    {
    }
    bool tryToKeepTogether() { return m_tryToKeepTogether; }
    void setTryToKeepTogether(bool value) { m_tryToKeepTogether = value; }
    bool isDataGroup() { return m_dataGroup; }
    bool isFooterGroup() { return m_footerGroup; }
    void setIsFooterGroup()
    {
        m_footerGroup = true;
        m_dataGroup = false;
    }

private:
    bool m_tryToKeepTogether;
    bool m_dataGroup;
    bool m_footerGroup;
};

struct PagesRange {
    int firstPage;
    int lastPage;
    bool isTOC;
};

class PagesRanges {
public:
    PagesRanges(): m_TOCRangeIndex(-1) { }
    int findLastPageNumber(int index);
    int findPageNumber(int index);
    PagesRange& currentRange(bool isTOC);
    void startNewRange(bool isTOC = false);
    void addTOCMarker(bool addNewRange);
    void addPage();
    void addTOCPage();
    void clear();

private:
    void shiftRangesNextToTOC();

private:
    QVector<PagesRange> m_ranges;
    int m_TOCRangeIndex;
};

class ReportRender: public QObject {
    Q_OBJECT
    Q_PROPERTY(QObject* datasourcesManager READ datasources)
public:
    enum DataRenderMode {
        StartNewPageAsNeeded,
        NotStartNewPage,
        ForcedStartPage
    };
    enum BandPrintMode {
        PrintAlwaysPrintable,
        PrintNotAlwaysPrintable
    };
    enum ResetPageNuberType {
        BandReset,
        PageReset
    };
    enum PageRenderStage {
        BeforePageHeader,
        AfterPageHeader
    };
    typedef QSharedPointer<ReportRender> Ptr;
    ~ReportRender();
    ReportRender(QObject* parent = 0);
    void setDatasources(DataSourceManager* value);
    void setScriptContext(ScriptEngineContext* scriptContext);
    DataSourceManager* datasources() { return m_datasources; }
    int pageCount();
    PageItemDesignIntf::Ptr pageAt(int index);
    QString renderPageToString(PageItemDesignIntf* patternPage);
    ReportPages renderPageToPages(PageItemDesignIntf* patternPage);
    ReportPages renderTOC(PageItemDesignIntf* patternPage, bool first, bool resetPages);
    void secondRenderPass(ReportPages renderedPages);
    void createTOCMarker(bool startNewRange);
signals:
    void pageRendered(int renderedPageCount);
public slots:
    void cancelRender();

private:
    void analizeContainer(BaseDesignIntf* item, BandDesignIntf* band);
    void analizeItem(ContentItemDesignIntf* item, BandDesignIntf* band);
    void analizePage(PageItemDesignIntf* patternPage);

    void initDatasources();
    void initDatasource(const QString& name);
    void initRenderPage();
    void initVariables();
    void initGroups();
    void clearPageMap();

    void renderPage(PageItemDesignIntf* patternPage, bool isTOC = false, bool isFirst = false,
                    bool = false);
    BandDesignIntf* renderBand(BandDesignIntf* patternBand, BandDesignIntf* bandData,
                               DataRenderMode mode = NotStartNewPage, bool isLast = false);
    void renderDataBand(BandDesignIntf* dataBand);
    void renderPageHeader(PageItemDesignIntf* patternPage);
    void renderReportHeader(PageItemDesignIntf* patternPage, PageRenderStage stage);
    void renderPageFooter(PageItemDesignIntf* patternPage);
    void renderPageItems(PageItemDesignIntf* patternPage);
    void renderChildHeader(BandDesignIntf* parent, BandPrintMode printMode);
    void renderChildFooter(BandDesignIntf* parent, BandPrintMode printMode);
    void renderChildBands(BandDesignIntf* parentBand);
    void recalcIfNeeded(BandDesignIntf* band);
    void renderDataHeader(BandDesignIntf* header);
    void renderGroupHeader(BandDesignIntf* parentBand, IDataSource* dataSource, bool firstTime);
    void renderGroupFooter(BandDesignIntf* parentBand);
    void moveTearOffBand();
    qreal calcPageFooterHeight(PageItemDesignIntf* patternPage);
    qreal calcSlicePercent(qreal height);

    bool containsGroupFunctions(BaseDesignIntf* container);
    void extractGroupFuntionsFromItem(ContentItemDesignIntf* contentItem, BandDesignIntf* band);
    void extractGroupFunctionsFromContainer(BaseDesignIntf* baseItem, BandDesignIntf* band);
    void extractGroupFunctions(BandDesignIntf* band);
    void replaceGroupFunctionsInItem(ContentItemDesignIntf* contentItem, BandDesignIntf* band);
    void replaceGroupFunctionsInContainer(BaseDesignIntf* baseItem, BandDesignIntf* band);
    void replaceGroupsFunction(BandDesignIntf* band);

    BandDesignIntf* findRecalcableBand(BandDesignIntf* patternBand);

    void popPageFooterGroupValues(BandDesignIntf* dataBand);
    void pushPageFooterGroupValues(BandDesignIntf* dataBand);

    enum GroupType {
        DATA,
        FOOTER
    };
    void closeGroup(BandDesignIntf* band);
    void openDataGroup(BandDesignIntf* band);
    void closeDataGroup(BandDesignIntf* band);
    void openFooterGroup(BandDesignIntf* band);
    void closeFooterGroup(BandDesignIntf* band);
    void cutGroups();
    void checkFooterGroup(BandDesignIntf* groupBand);
    void pasteGroups();
    void checkLostHeadersOnPrevPage();
    void checkLostHeadersInPrevColumn();

    BandDesignIntf* findEnclosingGroup();
    bool registerBand(BandDesignIntf* band, bool registerInChildren = true);
    BandDesignIntf* sliceBand(BandDesignIntf* band, BandDesignIntf* patternBand, bool isLast);

    BandDesignIntf* saveUppperPartReturnBottom(BandDesignIntf* band, int height,
                                               BandDesignIntf* patternBand);
    BandDesignIntf* renderData(BandDesignIntf* patternBand, bool emitBeforeRender = true);
    void startNewColumn();
    void startNewPage(bool isFirst = false);
    void resetPageNumber(ResetPageNuberType resetType);
    void savePage(bool isLast = false);
    QString toString();
    void initColumns();
    bool isNeedToRearrangeColumnsItems();
    BandDesignIntf* lastColumnItem(int columnIndex);
    void rearrangeColumnsItems();
    int columnItemsCount(int columnIndex);
    qreal columnHeigth(int columnIndex);
    qreal maxColumnHeight();
    void renameChildItems(BaseDesignIntf* item);
    void renderGroupFooterByHeader(BandDesignIntf* groupHeader);
    void updateTOC(BaseDesignIntf* item, int pageNumber);
    void placeBandOnPage(BandDesignIntf* band, int columnIndex);
    QColor makeBackgroundColor(BandDesignIntf* band);

private:
    DataSourceManager* m_datasources;
    ScriptEngineContext* m_scriptEngineContext;
    PageItemDesignIntf* m_renderPageItem;
    PageItemDesignIntf* m_patternPageItem;
    QList<PageItemDesignIntf::Ptr> m_renderedPages;
    QMultiMap<BandDesignIntf*, GroupBandsHolder*> m_childBands;
    QList<BandDesignIntf*> m_reprintableBands;
    QList<BandDesignIntf*> m_recalcBands;
    QMap<QString, QVector<QString>> m_groupfunctionItems;
    int m_currentIndex;
    int m_pageCount;

    QMap<QString, QVariant> m_popupedValues;
    QMultiMap<BandDesignIntf*, QString> m_popupedExpression;

    qreal m_pageFooterHeight;
    qreal m_dataAreaSize;
    qreal m_reportFooterHeight;
    int m_renderedDataBandCount;
    BandDesignIntf* m_lastRenderedHeader;
    BandDesignIntf* m_lastDataBand;
    BandDesignIntf* m_lastRenderedFooter;
    BandDesignIntf* m_lastRenderedBand;
    bool m_renderCanceled;
    QVector<qreal> m_maxHeightByColumn;
    QVector<qreal> m_currentStartDataPos;
    int m_currentColumn;
    PagesRanges m_pagesRanges;
    QVector<BandDesignIntf*> m_columnedBandItems;
    unsigned long long m_currentNameIndex;
    bool m_newPageStarted;
    bool m_lostHeadersMoved;
};
} // namespace LimeReport
#endif // LRREPORTRENDER_H