#ifndef FAULT_H
#define FAULT_H

//
#include "basicgeometryoperator.h"


//Qt
#include <QColor>
#include <QPainter>
#include <QPainterPath>
#include <QPaintEvent>
#include <QVector>
#include <QPainterPathStroker>
#include <QPen>
#include <QWidget>
#include <QPaintEngine>

class Fault
{
public:
    Fault(double scalex,double scaley,bool bmove,double tolerance, QString title = "Fault_0"):_scalex(scalex),_scaley(scaley),
        _move(bmove),_tolerance(tolerance){
        _title = title;
        _isGenerated = false;
        _painter = new QPainter();
    }

    Fault(QString title = "Fault_0"):_scalex(1),_scaley(1),
        _move(false),_tolerance(30){
        _title = title;
        _isGenerated = false;
        _painter = new QPainter();
    }

    ~Fault(){
        clear();
    }

    void addPoint(qreal x,qreal y){
        if(_rectPath.elementCount()==0){
            _rectPath.moveTo(x,y);
        }else{
            _rectPath.lineTo(x,y);
        }
        _points.push_back(QPointF(x,y));
    }

    void setPoint(int i,qreal x,qreal y){
        _rectPath.setElementPositionAt(i,x,y);
        _points[i] = QPointF(x,y);

        if(_move){
            setDotline();
            setTitle(_title);
        }
    }

    int pointCount(){
        return _points.count();
    }

    int elementCount(){
        return _rectPath.elementCount();
    }

    void setColor(int red,int green,int blue,int alpha = 50){
        _faultColor.setRgb(red,green,blue,alpha);
    }

    QColor getColor() const{
        return _faultColor;
    }

    QString getTitle() const{
        return _title;
    }

    void setTitle(const QString& title){
        _title = title;
        _titlePath = QPainterPath();
        _titlePath.addText(_rectPath.elementAt(_rectPath.elementCount()-1).x+1,
                     _rectPath.elementAt(_rectPath.elementCount()-1).y+1,
                     QFont(),_title);
    }

    void saveData(){
        // TODO
    }

    void setScalex(double scalex){
        _scalex = scalex;
    }
    double getScalex() const{
        return _scalex;
    }
    double getScaley() const{
        return _scaley;
    }
    void setScaley(double scaley){
        _scaley = scaley;
    }

    bool isMove() const
    {
        return _move;
    }

    void setMove(bool move)
    {
        _move = move;
    }

    QPainterPath getRectPath() const
    {
        return _rectPath;
    }

    void addRectPath(const QPainterPath &rectPath)
    {
        _rectPath.addPath(rectPath);
    }

    QVector<QPointF> getPoints() const
    {
        return _points;
    }

    double getTolerance() const
    {
        return _tolerance;
    }

    void setTolerance(double value)
    {
        _tolerance = value;
    }
    void clear(){
        _titlePath = QPainterPath();
        _rectPath = QPainterPath();
        _dotPath = QPainterPath();
        _points.clear();
        _isGenerated = false;
        _move = false;
         _title = "Fault_0";
        last = QPointF();
        _tolerance = 30;
    }

    void generate(){
        _isGenerated = true;
        _points.pop_back();
        int n = _points.count();
        if(n < 2){
            clear();
            return;
        }
        _rectPath = QPainterPath();
        _rectPath.addPolygon(_points);
        _titlePath = QPainterPath();
        _titlePath.addText(_rectPath.elementAt(_rectPath.elementCount()-1).x+1,
                     _rectPath.elementAt(_rectPath.elementCount()-1).y+1,
                     QFont(),_title);
    }

    void move(QMouseEvent *event){
        qreal x = event->posF().x();
        qreal y = event->posF().y();
        qreal tx = x - last.x();
        qreal ty = y - last.y();
        _rectPath.translate(tx,ty);
        _dotPath.translate(tx,ty);
        _titlePath.translate(tx,ty);
        int n = _points.count();
        for(int i=0;i<n;++i){
            qreal rx = _points[i].x();
            qreal ry = _points[i].y();
            _points[i].setX(rx+tx);
            _points[i].setY(ry+ty);
        }
        last = event->posF();
    }
    bool isGenerated(){
        return _isGenerated;
    }

    void pick(QMouseEvent* event){
        QPointF f = event->posF();
        setDotline();
        if(!contains(f)){
            return;
        }
        setMove(true);
        last = f;
    }

    void setDotline(){
        QPainterPathStroker stroker;
        stroker.setCapStyle(Qt::RoundCap);
        stroker.setDashPattern(Qt::DashLine);
        stroker.setJoinStyle(Qt::RoundJoin);
        stroker.setWidth(2);
        _dotPath = stroker.createStroke(_rectPath);
    }

    void clearDotPath(){
        _dotPath = QPainterPath();
    }

    bool contains(const QPointF& f){
        qreal x = f.x();
        qreal y = f.y();
        for(int i=0;i<=_tolerance;++i){
            if(_dotPath.contains(f+QPointF(i,0))||
                    _dotPath.contains(f+QPointF(-i,0))||
                    _dotPath.contains(f+QPointF(0,-i))||
                    _dotPath.contains(f+QPointF(0,i))){
                return true;
            }
        }
        return false;
    }

    int dotContains(const QPointF& f){
        qreal x = f.x();
        qreal y = f.y();
        for(int j=0;j<_points.size();++j) {
            qreal x1 = _points[j].x();
            qreal y1 = _points[j].y();
            for(int i=0;i<=_tolerance;++i){
                if(x1 <= (x+i)&&
                        x1 >= (x-i)&&
                        y1 >= (y-i)&&
                        y1 <= (y+i)){
                    return j;
                }
            }
        }
        return -1;
    }

    void paint(QWidget *w, QPaintEvent *event){
        _painter->begin(w);
        _painter->scale(_scalex, _scaley);
        _painter->setRenderHint(QPainter::Antialiasing);
        QPen pen;
        pen.setWidth(2);
        pen.setColor(_faultColor);
        _painter->setPen(pen);
        int n = _points.count();
        if(_move){
            for(int i=0;i<n;++i){
                _painter->drawEllipse(QPointF(_rectPath.elementAt(i).x,_rectPath.elementAt(i).y),3,3);
            }
            _painter->drawPath(_dotPath);
        }
        else{
            _painter->drawPath(_rectPath);
        }
        if(_titlePath.elementCount()>0){
            pen.setWidth(1);
            _painter->setPen(pen);
            _painter->drawPath(_titlePath);
        }
        _painter->end();
    }

private:
    QColor _faultColor;

    // 记录标题，比如fault_1
    QString _title;
    QVector<QPointF> _points;
    QPainter *_painter;

    QPointF last;
    QWidget *w;

    // 缩放
    double _scalex;
    double _scaley;

    // 移动
    bool _move;

    bool _isGenerated;

    // 容差
    double _tolerance;

    // fault的路径
    QPainterPath _rectPath;
    // title
    QPainterPath _titlePath;

    // fault的虚线框
    QPainterPath _dotPath;

};

#endif // FAULT_H