#ifndef RENDER_H
#define RENDER_H

#include <QImage>
#include <QPixmap>
#include <QPainter>
#include <QThread>
#include <QByteArray>
#include <QVector>
#include "comic.h"
//-----------------------------------------------------------------------------
// FILTERS
//-----------------------------------------------------------------------------

#include <QThread>

class Comic;
class ComicDB;
class Render;

class ImageFilter
{
public:
    ImageFilter() { };
    virtual ~ImageFilter() { };
    virtual QImage setFilter(const QImage &image) = 0;
    inline int getLevel() { return level; };
    inline void setLevel(int l) { level = l; };

protected:
    int level;
};

class MeanNoiseReductionFilter : public ImageFilter
{
public:
    enum NeighborghoodSize { SMALL = 9,
                             LARGE = 25 };
    MeanNoiseReductionFilter(enum NeighborghoodSize ns = SMALL);
    QImage setFilter(const QImage &image) override;

private:
    enum NeighborghoodSize neighborghoodSize;
};

class MedianNoiseReductionFilter : public ImageFilter
{
public:
    enum NeighborghoodSize { SMALL = 9,
                             LARGE = 25 };
    MedianNoiseReductionFilter(enum NeighborghoodSize ns = SMALL);
    QImage setFilter(const QImage &image) override;

private:
    enum NeighborghoodSize neighborghoodSize;
};

class BrightnessFilter : public ImageFilter
{
public:
    BrightnessFilter(int l = -1);
    QImage setFilter(const QImage &image) override;
};

class ContrastFilter : public ImageFilter
{
public:
    ContrastFilter(int l = -1);
    QImage setFilter(const QImage &image) override;
};

class GammaFilter : public ImageFilter
{
public:
    GammaFilter(int l = -1);
    QImage setFilter(const QImage &image) override;
};

//-----------------------------------------------------------------------------
// RENDER
//-----------------------------------------------------------------------------

class PageRender : public QThread
{
    Q_OBJECT
public:
    PageRender();
    PageRender(Render *render, int numPage, const QByteArray &rawData, QImage *page, unsigned int degrees = 0, QVector<ImageFilter *> filters = QVector<ImageFilter *>());
    int getNumPage() { return numPage; };
    void setData(const QByteArray &rawData) { data = rawData; };
    void setPage(QImage *p) { page = p; };
    void setRotation(unsigned int d) { degrees = d; };
    void setFilters(QVector<ImageFilter *> f) { filters = f; };

private:
    int numPage;
    QByteArray data;
    QImage *page;
    unsigned int degrees;
    QVector<ImageFilter *> filters;
    void run() override;
    Render *render;
signals:
    void pageReady(int);
};
//-----------------------------------------------------------------------------
// RENDER
//-----------------------------------------------------------------------------

/*class DoublePageRender : public PageRender
{
        Q_OBJECT
public:
                DoublePageRender(Render * render, int firstPage, const QByteArray & firstPageData,const QByteArray & secondPageData, QImage * page,unsigned int degrees=0, QVector<ImageFilter *> filters = QVector<ImageFilter *>());
private:
        int numPage;
        QByteArray data;
        QByteArray data2;
                QImage * page;
        unsigned int degrees;
        QVector<ImageFilter *> filters;
        void run();
        Render * render;
signals:
        void pageReady(int);

};
*/

class Render : public QObject
{
    Q_OBJECT
public:
    Render();
    ~Render() override;

public slots:
    void render();
    QPixmap *getCurrentPage();
    QPixmap *getCurrentDoublePage();
    QPixmap *getCurrentDoubleMangaPage();
    bool currentPageIsDoublePage();
    bool nextPageIsDoublePage();
    bool previousPageIsDoublePage();
    void goTo(int index);
    void doublePageSwitch();
    void setManga(bool manga);
    void doubleMangaPageSwitch();
    void setRotation(int degrees);
    void setComic(Comic *c);
    void prepareAvailablePage(int page);
    void update();
    void setNumPages(unsigned int numPages);
    void pageRawDataReady(int page);
    //--comic interface
    void nextPage();
    void previousPage();
    void nextDoublePage();
    void previousDoublePage();
    void load(const QString &path, const ComicDB &comic);
    void load(const QString &path, int atPage);
    void createComic(const QString &path);
    void loadComic(const QString &path, const ComicDB &comic);
    void loadComic(const QString &path, int atPage);
    void startLoad();
    void rotateRight();
    void rotateLeft();
    unsigned int getIndex();
    unsigned int numPages();
    bool hasLoadedComic();
    void updateBuffer();
    void fillBuffer();
    void invalidate();
    QString getCurrentPagesInformation();
    void setBookmark();
    void removeBookmark();
    void save();
    void reset();
    void reload();
    void updateFilters(int brightness, int contrast, int gamma);
    Bookmarks *getBookmarks();
    // sets the firt page to render
    void renderAt(int page);

signals:
    void currentPageReady();
    void processingPage();
    void imagesLoaded();
    void imageLoaded(int index);
    void imageLoaded(int index, const QByteArray &image);
    void pageChanged(int index);
    void numPages(unsigned int numPages);
    void errorOpening();
    void errorOpening(QString);
    void crcError(QString);
    void currentPageIsBookmark(bool);
    void isLast();
    void isCover();

    void bookmarksUpdated();

private:
    Comic *comic;
    bool doublePage;
    bool doubleMangaPage;
    int previousIndex;
    int currentIndex;
    // QPixmap * currentPage;
    int currentPageBufferedIndex;
    int numLeftPages;
    int numRightPages;
    QList<PageRender *> pageRenders;
    QList<QImage *> buffer;
    void loadAll();
    void updateRightPages();
    void updateLeftPages();
    bool loadedComic;
    QList<int> pagesEmited;
    QVector<bool> pagesReady;
    int imageRotation;
    QVector<ImageFilter *> filters;
    QMutex mutex;

    friend class PageRender;
};

#endif // RENDER_H