#ifndef TEXT_PRESENT_H
#define TEXT_PRESENT_H

#include "libtextedit.h"
#include <libConfig.h>
#include <QString>
#include <QFont>
#include <memory>

namespace model_text {
    typedef QList<uint32_t> CharStream;
    
    class LIBTEXTEDIT_EXPORT CharSetU16 {
    public:
        static CharStream combineToU(const QString &buffer);
        static QString splitToC(const CharStream &buffer);
        static bool contains(uint32_t code);
        static uint size();
    };
    
    class LIBTEXTEDIT_EXPORT CharFormat {
    private:
        qulonglong unique_id;
        
        uint32_t point_size;
        QString fontfamily_store;
        bool bold_store;
        bool italic_flag;
        bool kerning_flag;
        bool overline_flag;
        bool underline_flag;
        double float_Height;
        QFont::Weight weight_store;
        
    public:
        CharFormat(qulonglong format_id);
        CharFormat(const CharFormat& other);

        qulonglong formatID() const;

        uint32_t pointSize() const;
        QString fontFamily() const;
        bool bold() const;
        bool italic() const;
        bool kerning() const;
        bool overline() const;
        bool underline() const;
        double floatHeight() const;
        QFont::Weight weight() const;
        
        void setPointSize(uint32_t val);
        void setFontFamily(const QString &name);
        void setBold(bool ste);
        void setItalic(bool ste);
        void setKerning(bool ste);
        void setOverline(bool ste);
        void setUnderline(bool ste);
        void setFloatHeight(double val);
        void setWeight(QFont::Weight val);
        
        bool operator==(const CharFormat &other);
        CharFormat &operator=(const CharFormat &other);
    };
    
    class LIBTEXTEDIT_EXPORT DocFormat {
    private:
        std::shared_ptr<CharFormat> char_format;
        double line_height = 20;
        double indent_char_count = 2;
        QMargins margins_store = QMargins(5,5,5,5);
        bool visible_of_additional = false;
        
    public:
        DocFormat();
        DocFormat(const DocFormat &other);

        double lineHeight() const;
        QMargins margins() const;
        double indentChars() const;
        bool additionalVisible() const;
        std::shared_ptr<CharFormat> defaultCharFormat() const;

        void setLineHeight(double val);
        void setMargins(const QMargins &val);
        void setIndentChars(double n);
        void setAdditionalVisible(bool ste);
        void setDefaultCharFormat(std::shared_ptr<CharFormat> format);
        
        DocFormat& operator=(const DocFormat &other);
    };
    
    class WsBlock;
    /**
     * @brief 琛屽唴鍏冪礌
     */
    class Element {
    public:
        enum class Type{
            Char, Set
        };
        
        virtual ~Element() = default;
        
        virtual void refer(std::weak_ptr<WsBlock> ptr) = 0;
        virtual std::weak_ptr<WsBlock> blockRefer() const = 0;
        
        virtual uint32_t blockIndex() const = 0;
        
        virtual std::shared_ptr<CharFormat> getFormat() const = 0;
        
        virtual void bindFormat(std::shared_ptr<CharFormat> format) = 0;
        
        virtual Type type() const = 0;
        
        virtual uint32_t index() const = 0;
        
        virtual QString toText() const = 0;
        
        virtual uint32_t childCount() const = 0;
    };

    
    class LIBTEXTEDIT_EXPORT WsChar : public Element {
    private:
        uint32_t code_store;
        std::shared_ptr<CharFormat> char_format_refer;
        
    public:
        explicit WsChar(uint32_t code){this->code_store = code;}
        virtual ~WsChar() = default;

        uint32_t code() const { return code_store; }

        static QList<WsChar*> convertFrom(const CharStream &codes);
        
        // Element interface
    public:
        virtual std::shared_ptr<CharFormat> getFormat() const override { return this->char_format_refer; }
        virtual void bindFormat(std::shared_ptr<CharFormat> format) override{this->char_format_refer = format;}
        virtual Type type() const override { return Type::Char; }
        virtual uint32_t blockIndex() const override;
        virtual uint32_t index() const override;
        virtual QString toText() const override { return CharSetU16::splitToC(QList<uint32_t>() << code_store); }
        virtual uint32_t childCount() const override { return 0; }
        virtual void refer(std::weak_ptr<WsBlock> ptr) override;
        virtual std::weak_ptr<WsBlock> blockRefer() const override;
    };
    
    
    class LIBTEXTEDIT_EXPORT WsPart : public Element {
    public:
        
        void insertChars(const QList<WsChar*> &text, uint32_t offset = -1);
        
        QList<WsChar*> getChars(uint32_t offset, uint32_t count) const;
        
        void delChars(uint32_t offset, uint32_t count);
    };
    
    class LIBTEXTEDIT_EXPORT WsBlock {
    private:
        QList<Element*> element_store;
        
    public:
        uint32_t blockIndex() const;
        void addElements(const QList<Element*> &text, uint32_t offset = UINT32_MAX);
        QList<Element*> getElements(uint32_t offset, uint32_t count) const;
        void delElements(uint32_t offset, uint32_t count);
        QString toText() const;
    };

    class LIBTEXTEDIT_EXPORT WsDocument : public QObject {
        Q_OBJECT
    private:
        std::shared_ptr<DocFormat> document_format;
        QList<std::shared_ptr<WsBlock>> block_store;
        
    public:
        void bindFormat(std::shared_ptr<DocFormat> f);
        std::shared_ptr<DocFormat> getFormat() const;
        
        void addBlocks(const QList<std::shared_ptr<WsBlock>> &blks, uint32_t offset = UINT32_MAX);
        uint32_t blockCount() const;
        QList<std::shared_ptr<WsBlock>> getBlocks(uint32_t offset, uint32_t count = 1) const;
        void delBlocks(uint32_t offset, uint32_t count = 1);
        //        void insertText(QList<WsChar> part, uint32_t index = -1);
        //        QList<WsChar> getText(uint32_t index, uint32_t count);
        //        void delText(uint32_t index, uint32_t count);
        //        void select(uint32_t index, uint32_t count);
        QString toPlainText() const;
        void setPlainText(const QString &text);

        //    signals:
        //        void blockHasbeenInserted(uint32_t index);
        //        void blockAboutTobeDelete(uint32_t index);
        //        void blockHasbeenChanged(uint32_t index);

        //        void redoAvaliable();
        //        void undoAvaliable();
        //        void cursorPosChanged(uint32_t index);
        //        void selectionChanged(uint32_t index, uint32_t count);
    };
}

#endif // TEXT_PRESENT_H