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#ifndef DOCUMENTHANDLER_H
#define DOCUMENTHANDLER_H

#include <QQuickTextDocument>

#include <QtGui/QTextCharFormat>
#include <QtCore/QTextCodec>

#include <qqmlfile.h>
#include <ukui-log4qt.h>

QT_BEGIN_NAMESPACE
class QTextDocument;
QT_END_NAMESPACE 

class DocumentHandler : public QObject
{
    Q_OBJECT

    Q_ENUMS(HAlignment)

    Q_PROPERTY(QQuickItem *target READ target WRITE setTarget NOTIFY targetChanged)
    Q_PROPERTY(int cursorPosition READ cursorPosition WRITE setCursorPosition NOTIFY cursorPositionChanged)
    Q_PROPERTY(int selectionStart READ selectionStart WRITE setSelectionStart NOTIFY selectionStartChanged)
    Q_PROPERTY(int selectionEnd READ selectionEnd WRITE setSelectionEnd NOTIFY selectionEndChanged)

    Q_PROPERTY(QColor textColor READ textColor WRITE setTextColor NOTIFY textColorChanged)
    Q_PROPERTY(QString fontFamily READ fontFamily WRITE setFontFamily NOTIFY fontFamilyChanged)
    Q_PROPERTY(Qt::Alignment alignment READ alignment WRITE setAlignment NOTIFY alignmentChanged)

    Q_PROPERTY(bool bold READ bold WRITE setBold NOTIFY boldChanged)
    Q_PROPERTY(bool italic READ italic WRITE setItalic NOTIFY italicChanged)
    Q_PROPERTY(bool underline READ underline WRITE setUnderline NOTIFY underlineChanged)
    Q_PROPERTY(bool strikeOut READ strikeOut WRITE setStrikeOut NOTIFY strikeOutChanged)

    Q_PROPERTY(int fontSize READ fontSize WRITE setFontSize NOTIFY fontSizeChanged)
    Q_PROPERTY(QStringList defaultFontSizes READ defaultFontSizes NOTIFY defaultFontSizesChanged)
    Q_PROPERTY(int outline READ outline WRITE setOutline NOTIFY outlineChanged)
    Q_PROPERTY(QTextListFormat::Style listStyle READ listStyle WRITE setListStyle NOTIFY listStyleChanged)

    Q_PROPERTY(QUrl fileUrl READ fileUrl WRITE setFileUrl NOTIFY fileUrlChanged)
    Q_PROPERTY(QString text READ text WRITE setText NOTIFY textChanged)
    Q_PROPERTY(QString documentTitle READ documentTitle WRITE setDocumentTitle NOTIFY documentTitleChanged)
    Q_PROPERTY(QString editMessage READ editMessage WRITE setEditMessage NOTIFY editMessageChanged)


public:
    DocumentHandler();

    QQuickItem *target() { return m_target; }

    void setTarget(QQuickItem *target);

    void setCursorPosition(int position);
    void setSelectionStart(int position);
    void setSelectionEnd(int position);

    int cursorPosition() const { return m_cursorPosition; }
    int selectionStart() const { return m_selectionStart; }
    int selectionEnd() const { return m_selectionEnd; }

    // 获取当前样式信息
    QString fontFamily() const;

    QColor textColor() const;

    Qt::Alignment alignment() const;
    void setAlignment(Qt::Alignment a);

    bool bold() const;
    bool italic() const;
    bool underline() const;
    bool strikeOut() const;
    int fontSize() const;
    int outline() const;
    QTextListFormat::Style listStyle() const;

    QStringList defaultFontSizes() const;
    QUrl fileUrl() const;
    QString text() const;

    QString documentTitle() const;

    QString editMessage();

public Q_SLOTS:
    void setBold(bool arg);
    void setItalic(bool arg);
    void setUnderline(bool arg);
    void setStrikeOut(bool arg);
    void setFontSize(int arg);
    void setTextColor(const QColor &arg);
    void setFontFamily(const QString &arg);
    void setOutline(const int level);
    void setListStyle(QTextListFormat::Style style);
    void setOrderedList();
    void setUnorderedList();

    void setFileUrl(const QUrl &arg);
    void setText(const QString &arg);
//    void saveAs(const QString &fileType);

    void setDocumentTitle(QString arg);

    void replaceText(QString text, int start, int end);
    void insertText(QString text, int position);
    void setEditMessage(QString arg);

    void markTextSelected(int start, int end);
    void markTextUnselected(int start, int end);

    QString getHtmlContent();
    QString getPlainTextContent();
    QString getMarkdownContent();

Q_SIGNALS:
    void targetChanged();
    void cursorPositionChanged();
    void selectionStartChanged();
    void selectionEndChanged();

    void fontFamilyChanged();
    void textColorChanged();
    void alignmentChanged();

    void boldChanged();
    void italicChanged();
    void underlineChanged();
    void strikeOutChanged();

    void fontSizeChanged();
    void defaultFontSizesChanged();
    void outlineChanged();
    void listStyleChanged();

    void fileUrlChanged();

    void textChanged();
    void documentTitleChanged();

    void editMessageChanged();
    void error(QString message);

private:
    void reset();
    QTextCursor textCursor() const;
    void mergeFormatOnWordOrSelection(const QTextCharFormat &format);

    QQuickItem *m_target;
    QTextDocument *m_doc;

    int m_cursorPosition;
    int m_selectionStart;
    int m_selectionEnd;

    QFont m_font;
    int m_fontSize;
    QUrl m_fileUrl;
    QString m_text;
    QString m_documentTitle;
    QString m_editMessage;
};

#endif
