#ifndef TRANSPARENTDRAGGABLERECT_H
#define TRANSPARENTDRAGGABLERECT_H
 
#include <QObject>
#include "qmycustomplot.h"
#include <QString>
#include <QMenu>
 
#pragma execution_character_set("utf-8")  // 强制指定执行字符集为 UTF-8
 
class TransparentDraggableRect : public QObject
{
    Q_OBJECT
public:
    explicit TransparentDraggableRect(QMyCustomPlot *parentPlot, double minWidth = 1.0, QString strTitle = "")
        : QObject(parentPlot), mPlot(parentPlot), mstrTitle(strTitle), mMinWidth(minWidth)
    {
        initRect();
    }
 
    ~TransparentDraggableRect() {
        if(mPlot) {
//            mPlot->removeItem(mRect);
//            mPlot->removeItem(mLeftHandle);
//            mPlot->removeItem(mRightHandle);
        }
    }
 
    //设置最小宽度
    void setMinWidth(double minWidth){
        mMinWidth = minWidth;
    }
 
    //设置标题
    void setTitle(QString strTitle){
        mstrTitle = strTitle;
//        mItemTitle->setText(mstrTitle);
//        mPlot->replot();
    }
 
    // 设置矩形范围
    void setRange(double left_Low, double right_Hight) {
        if(left_Low >= right_Hight) return;
 
        double lY1 = mPlot->yAxis->range().lower;//+10
        double lY2 = mPlot->yAxis->range().upper;
        mRect->topLeft->setCoords(left_Low, lY1);
        mRect->bottomRight->setCoords(right_Hight, lY2);

        mPixmap->topLeft->setCoords(left_Low, lY1);
        mPixmap->bottomRight->setCoords(right_Hight, lY2);

        //mRect->topLeft->setCoords(left, mPlot->yAxis->range().upper);
        //mRect->bottomRight->setCoords(right, mPlot->yAxis->range().lower);

        updateHandles();
        mPlot->replot();
    }
 
    // 获取当前范围
    QCPRange getRange() const {
        return QCPRange(mRect->topLeft->coords().x(), mRect->bottomRight->coords().x());
    }
 
    // 设置矩形颜色
    void setColor(const QColor &color) {
        mRect->setBrush(QBrush(color));
        mRect->setPen(QPen(color.darker()));
        mPlot->replot();
    }
 
    // 删除框图
    void deleteRect() {
        if(mPlot) {

//            mRect->deleteLater();
//            mLeftHandle->deleteLater();
//            mRightHandle->deleteLater();
//            mPixmap->deleteLater();

            mPlot->removeItem(mRect);
            mPlot->removeItem(mLeftHandle);
            mPlot->removeItem(mRightHandle);
            mPlot->removeItem(mPixmap);

            mPlot->replot();
            this->deleteLater();

            //
//            //避免二次绘制框图
//            mPlot->m_bDrawRect = false;
//            mDragMode = DragNone;
//            //取消选中框
//            mPlot->selectionRect()->cancel();
//            mPlot->replot();
//            mPlot->selectionRect()->mActive=true;
        }
    }

signals:
    void rangeChanged(QCPRange newRange);
 
private:
    void initRect() {
        // 创建透明矩形
        mRect = new QCPItemRect(mPlot);
        mRect->setLayer("overlay"); // 确保在最上层
        mRect->setBrush(QBrush(QColor(100, 100, 255, 50))); // 半透明蓝色
        mRect->setPen(QPen(QColor(70, 70, 255, 200)));
 
        // 创建左右边界控制点
        mLeftHandle = new QCPItemRect(mPlot);
        mLeftHandle->setLayer("overlay");
        mLeftHandle->setBrush(QBrush(Qt::red));
        mLeftHandle->setPen(QPen(Qt::darkRed));
 
        mRightHandle = new QCPItemRect(mPlot);
        mRightHandle->setLayer("overlay");
        mRightHandle->setBrush(QBrush(Qt::red));
        mRightHandle->setPen(QPen(Qt::darkRed));
 
        // 设置初始位置
        //double center = mPlot->xAxis->range().center();
//        setRange(center - 10, center + 10);
 
        // 连接鼠标事件
        connect(mPlot, &QCustomPlot::mousePress, this, &TransparentDraggableRect::onMousePress);
        connect(mPlot, &QCustomPlot::mouseMove, this, &TransparentDraggableRect::onMouseMove);
        connect(mPlot, &QCustomPlot::mouseRelease, this, &TransparentDraggableRect::onMouseRelease);
 
        mPixmap = new QCPItemPixmap(mPlot);
        mPixmap->setPixmap(QPixmap(":/image/file.png")); // 设置图片
        mPixmap->setScaled(true, Qt::IgnoreAspectRatio); // 设置缩放方式
        mPixmap->setLayer("overlay"); // 确保在最上层

//        mItemTitle = new QCPItemText(mPlot);
//        mItemTitle->setText(mstrTitle);
//        //mItemTitle->setBrush(QBrush(Qt::red));
//        mItemTitle->setFont(QFont("Arial", 12, QFont::Bold));
//        mItemTitle->setColor(Qt::black);
//        mItemTitle->setPositionAlignment(Qt::AlignTop | Qt::AlignHCenter);
//        mItemTitle->position->setType(QCPItemPosition::ptAxisRectRatio);
//        mItemTitle->position->setCoords(0.5, 0);
//        mItemTitle->setLayer("overlay");
    }
 
    void updateHandles() {
        // 左边界矩形控制点
        mLeftHandle->topLeft->setParentAnchor(mRect->topLeft);
        mLeftHandle->bottomRight->setParentAnchor(mRect->topRight);//(mRect->bottomLeft);
        mLeftHandle->topLeft->setCoords(-5, 5);      // 矩形大小
        mLeftHandle->bottomRight->setCoords(5, -5);  // 矩形大小
 
        // 右边界矩形控制点
        mRightHandle->topLeft->setParentAnchor(mRect->bottomLeft);
        mRightHandle->bottomRight->setParentAnchor(mRect->bottomRight);
        mRightHandle->topLeft->setCoords(-5, 5);      // 矩形大小
        mRightHandle->bottomRight->setCoords(5, -5);  // 矩形大小
    }
 
private slots:
    void onDelRect()
    {
        //mDragMode = DragNone;
        //删除框图
        deleteRect();
    }

    // 事件过滤器处理函数
//    bool eventFilter(QObject* object, QEvent* event) {
//        if (event->type() == QEvent::MouseButtonPress) {
//            // 拦截操作
//            return true; // 阻止事件传递

////            if (object == action) {
////                // 验证权限
////                if (1) {
////                    // 允许操作
////                    action->trigger();
////                } else {
////                    // 拦截操作
////                    return true; // 阻止事件传递
////                }
////            }
//        }
//        return false; // 默认不拦截其他事件
//    }

    void onMousePress(QMouseEvent *event) {
        if(event->button() != Qt::LeftButton)
        {
            double y = mPlot->xAxis->pixelToCoord(event->pos().y());//x轴展示深度
            QCPRange currentRange = getRange();
            if(mLeftHandle->selectTest(event->pos(), false) < 5) {
                mDragMode = DragNone;
            }
            else if(mRightHandle->selectTest(event->pos(), false) < 5) {
                mDragMode = DragNone;
            }
            //else if(x >= currentRange.lower && x <= currentRange.upper) {
            else if(y >= currentRange.lower && y <= currentRange.upper) {
                mDragMode = DragNone;
            }
            else {
                mDragMode = DragNone;
                return;
            }

            //event->accept();

            QMenu menu(nullptr);
            QAction *delAction = menu.addAction("删除框图");
            //delAction->installEventFilter(this);
            connect(delAction, &QAction::triggered, this, &TransparentDraggableRect::onDelRect);

//            QAction* pItem = menu.exec(event->globalPos());
//            if(pItem == delAction)
//            {
//                //event->accept();

//                int ii=0;
//                ii++;
//            }
            menu.exec(event->globalPos());

            return;
        }

        event->accept();
 
        // 检查点击了哪个部分
        //double x = mPlot->xAxis->pixelToCoord(event->pos().x());
        //double y = mPlot->yAxis->pixelToCoord(event->pos().y());
 
        double y = mPlot->xAxis->pixelToCoord(event->pos().y());//x轴展示深度

        QCPRange currentRange = getRange();
 
        if(mLeftHandle->selectTest(event->pos(), false) < 5) {
            mDragMode = DragLeft;
        }
        else if(mRightHandle->selectTest(event->pos(), false) < 5) {
            mDragMode = DragRight;
        }
        //else if(x >= currentRange.lower && x <= currentRange.upper) {
        else if(y >= currentRange.lower && y <= currentRange.upper) {
            mDragMode = DragRect;
        }
        else {
            mDragMode = DragNone;
            return;
        }
 
        //mDragStartX = x;
        mDragStartY = y;
        mDragStartRange = currentRange;

    }
 
    void onMouseMove(QMouseEvent *event) {
        if(mDragMode == DragNone) return;

        event->accept();

        //double x = mPlot->xAxis->pixelToCoord(event->pos().x());
        //double dx = x - mDragStartX;

        double y = mPlot->xAxis->pixelToCoord(event->pos().y());
        double dy = y - mDragStartY;
 
        QCPRange newRange = mDragStartRange;
 
        switch(mDragMode) {
        case DragLeft: {
            //double proposedLeft = mDragStartRange.lower + dx;
            double proposedLeft = mDragStartRange.lower + dy;
            // 确保不超出轴范围且不使宽度小于最小值
            newRange.lower = qBound(
                mPlot->xAxis->range().lower,
                proposedLeft,
                mDragStartRange.upper - mMinWidth);
            break;
        }
        case DragRight: {
            //double proposedRight = mDragStartRange.upper + dx;
            double proposedRight = mDragStartRange.upper + dy;
            // 确保不超出轴范围且不使宽度小于最小值
            newRange.upper = qBound(
                mDragStartRange.lower + mMinWidth,
                proposedRight,
                mPlot->xAxis->range().upper);
            break;
        }
        case DragRect: {
            double width = mDragStartRange.size();
            //double center = mDragStartRange.center() + dx;
            double center = mDragStartRange.center() + dy;
            newRange.lower = center - width/2;
            newRange.upper = center + width/2;
 
            // 检查是否超出轴范围
            QCPRange axisRange = mPlot->xAxis->range();
            if(newRange.lower < axisRange.lower) {
                newRange.lower = axisRange.lower;
                newRange.upper = newRange.lower + width;
            }
            else if(newRange.upper > axisRange.upper) {
                newRange.upper = axisRange.upper;
                newRange.lower = newRange.upper - width;
            }
            break;
        }
        default:
            break;
        }
 
        //取整数(方便显示统计，左右边界整数显示。)
        newRange.lower = (int)newRange.lower;
        QCPRange rangeByFile = mPlot->xAxis->range();
        if (std::fabs(rangeByFile.upper - (int)newRange.upper) >= 1.0)
        {
            newRange.upper = (int)newRange.upper;
        }
 
        // 最终确保宽度不小于最小值（针对整体拖动的情况）
        if(newRange.size() < mMinWidth) {
            if(mDragMode == DragRect) {
                // 如果是整体拖动，保持中心点不变
                double center = newRange.center();
                newRange.lower = center - mMinWidth/2;
                newRange.upper = center + mMinWidth/2;
            } else {
                // 如果是边界拖动，强制设置最小宽度
                if(mDragMode == DragLeft) {
                    newRange.lower = newRange.upper - mMinWidth;
                } else if(mDragMode == DragRight) {
                    newRange.upper = newRange.lower + mMinWidth;
                }
            }
        }
 
        setRange(newRange.lower, newRange.upper);

    }
 
    void onMouseRelease(QMouseEvent *event) {
        if(event->button() == Qt::LeftButton && mDragMode != DragNone) {            
            event->accept();
            //避免二次绘制框图
            mPlot->m_bDrawRect = false;
            //emit rangeChanged(getRange());
            mDragMode = DragNone;
            //取消选中状态
//            QCPDataSelection emptySelection;
//            mPlot->graph(0)->setSelection(emptySelection);
//            mPlot->replot();

            //取消选中框
            mPlot->selectionRect()->cancel();
            mPlot->replot();
            mPlot->selectionRect()->mActive=true;
        }
    }
 
private:
    QMyCustomPlot *mPlot;
    QCPItemRect *mRect;
    QCPItemRect *mLeftHandle;
    QCPItemRect *mRightHandle;
 
    QCPItemPixmap *mPixmap;
    //QCPItemText *mItemTitle;
    QString mstrTitle;
 
    enum DragMode { DragNone, DragLeft, DragRight, DragRect };
    DragMode mDragMode = DragNone;
    //double mDragStartX = 0;
    double mDragStartY = 0;
    QCPRange mDragStartRange;
 
    // 添加最小宽度成员变量
    double mMinWidth;
};
 
#endif // TRANSPARENTDRAGGABLERECT_H