#include "comparator.h"
#include <QMenu>
#include <QPainter>
#include <QStyleOptionGraphicsItem>

Comparator::Comparator(const QString &type) : Item(type)
{

}

QRectF Comparator::boundingRect() const
{
    return QRectF(-22, -20, 44, 40);
}

void Comparator::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *)
{
    painter->setRenderHint(QPainter::Antialiasing);
    if (state()) {
        painter->setBrush(Qt::green); // 激活状态
    } else {
        painter->setBrush(Qt::white); // 未激活状态
    }
    if (type_ == "比较") {
        painter->drawRect(QRectF(-12, -8, 24, 16));
        painter->setFont(QFont("Arial", 8));
        painter->drawText(QRectF(-10, -8, 20, 16), Qt::AlignCenter, compare_);

        // 锚点
        painter->setBrush(Qt::darkGray);
        painter->setPen(Qt::NoPen);
        painter->drawEllipse(QPointF(-18, 0), 4, 4);
        painter->drawEllipse(QPointF(18, 0), 4, 4);
    }
        painter->save();
        painter->setFont(QFont("Arial", 8));
        painter->setPen(Qt::black);
        if (!registerId_.isEmpty()) {
            QString text = QString("%1: %2").arg(registerId_).arg(registerValue_);
            painter->drawText(QRectF(-20, -25, 40, 20), Qt::AlignCenter, text);
        }

        // 在右上角显示第二个寄存器
        if (!registerId2_.isEmpty()) {
            QString text = QString("%1: %2").arg(registerId2_).arg(registerValue2_);
            painter->drawText(QRectF(-20, 5, 40, 20), Qt::AlignCenter, text);
        }
        painter->restore();
    if (option->state & QStyle::State_Selected) {
        QPen pen(Qt::DashLine);
        pen.setColor(Qt::blue);
        pen.setWidth(2);
        painter->setPen(pen);
        painter->setBrush(Qt::NoBrush);
        painter->drawRect(boundingRect());
    }
}

void Comparator::setRegisterId(const QString &id)
{
    if (registerId_.isEmpty())
    {
        registerId_ = id;
    }
    else if(registerId2_.isEmpty())
    {
        registerId2_ = id;
    }
}

void Comparator::setRegisterValue(const QString &registerId, quint16 value)
{
    if (registerId_ == registerId)
    {
        registerValue_ = value;
        update(); // 触发重绘
    }
    if (registerId2_ == registerId)
    {
        registerValue2_ = value;
        update(); // 触发重绘
    }
}

void Comparator::addMenuActions(QMenu *menu)
{
    menu->addAction("比较");
}

void Comparator::handleMenuAction(QAction *action)
{
    if (action->text() == "复制") {
        emit requestCopy(this);
    }
    if (action->text() == "删除") {
        emit requestDelete(this);
    }
    if (action->text() == "对象"){
        emit requestBindRegister(this);
    }
    if (action->text() == "比较"){
        emit requestCompare(this);
    }
}

void Comparator::setCompare(QString compare)
{
    compare_ = compare;
    update();
}

bool Comparator::state() const
{
    if (compare_ == ">") return registerValue_ > registerValue2_;
    if (compare_ == "<") return registerValue_ < registerValue2_;
    if (compare_ == "=") return registerValue_ == registerValue2_;
    if (compare_ == ">=") return registerValue_ >= registerValue2_;
    if (compare_ == "<") return registerValue_ <= registerValue2_;
    return false;
}