#include "hmicontrolitem.h"
#include <QPainter>
#include <QGraphicsScene>
#include <QCursor>
#include <QMenu>
#include <QAction>
#include <QGraphicsView>
#include <QColorDialog>
#include <QDebug>
#include <QInputDialog>
#include "hmibutton.h"
#include "hmiled.h"
#include <QMessageBox>
// 静态剪贴板数据，初始化为空
QVariantMap HmiControlItem::m_clipboardData;

// 构造函数：初始化控件基本属性
HmiControlItem::HmiControlItem(QGraphicsItem* parent)
    : QObject(nullptr), QGraphicsItem(parent), m_registerAddress()
{
    // 设置控件属性：可移动、可选择、发送几何变化通知
    setFlags(QGraphicsItem::ItemIsMovable |
             QGraphicsItem::ItemIsSelectable |
             QGraphicsItem::ItemSendsGeometryChanges);
    // 启用鼠标悬停事件
    setAcceptHoverEvents(true);
    // 设置变换原点为控件左上角
    setTransformOriginPoint(0, 0);
}

// 检查鼠标是否在右下角缩放区域
// 返回：true（在缩放区域内），false（不在）
bool HmiControlItem::isInScaleArea(const QPointF& pos) {
    QRectF contentRect = boundingRect().adjusted(1, 1, -1, -1);
    return (pos.x() >= contentRect.width() - m_scaleAreaSize &&
            pos.x() <= contentRect.width()) &&
           (pos.y() >= contentRect.height() - m_scaleAreaSize &&
            pos.y() <= contentRect.height());
}

// 鼠标悬停事件处理：根据鼠标位置设置光标样式
void HmiControlItem::hoverMoveEvent(QGraphicsSceneHoverEvent* event) {
    if (isSelected()) {
        // 如果控件被选中
        if (isInScaleArea(event->pos())) {
            // 鼠标在右下角缩放区域，显示缩放光标
            setCursor(Qt::SizeFDiagCursor);
        } else {
            // 鼠标在控件其他区域，显示移动光标
            setCursor(Qt::SizeAllCursor);
        }
    } else {
        // 控件未选中，显示默认光标
        setCursor(Qt::ArrowCursor);
    }
    QGraphicsItem::hoverMoveEvent(event);
}

// 鼠标按下事件处理：开始拖动或缩放
void HmiControlItem::mousePressEvent(QGraphicsSceneMouseEvent* event) {
    if (isSelected() && isInScaleArea(event->pos())) {
        // 选中控件且点击缩放区域，进入缩放模式
        m_isScaling = true;
        m_originalRect = boundingRect().adjusted(1, 1, -1, -1);
        m_scaleStartPos = event->pos();
        event->accept();
        return;
    }
    // 记录拖动开始位置
    m_dragStartPos = event->pos();
    QGraphicsItem::mousePressEvent(event);
}

// 鼠标移动事件处理：处理控件拖动或缩放
void HmiControlItem::mouseMoveEvent(QGraphicsSceneMouseEvent* event) {
    if (m_isScaling) {
        // 缩放模式：根据鼠标移动调整控件大小
        qreal deltaX = event->pos().x() - m_scaleStartPos.x();
        QRectF currentRect = transform().mapRect(m_originalRect);
        qreal newWidth = currentRect.width() + deltaX;
        newWidth = qMax(m_minWidth, qMin(newWidth, m_maxWidth));
        qreal aspectRatio = getAspectRatio();
        qreal newHeight = newWidth / aspectRatio;
        newHeight = qMax(m_minHeight, qMin(newHeight, m_maxHeight));
        newWidth = newHeight * aspectRatio;
        if (qAbs(newWidth - currentRect.width()) > 1 ||
            qAbs(newHeight - currentRect.height()) > 1) {
            // 更新控件大小，应用缩放变换
            prepareGeometryChange();
            qreal scaleX = newWidth / m_originalRect.width();
            qreal scaleY = newHeight / m_originalRect.height();
            resetTransform();
            setTransform(QTransform::fromScale(scaleX, scaleY), false);
            update();
        }
        event->accept();
        return;
    }
    if (isSelected()) {
            // 使用scenePos计算偏移量，更准确
            QPointF delta = event->scenePos() - event->lastScenePos();
            QPointF newPos = pos() + delta;

            // 获取变换后的边界矩形
            QRectF itemRect = mapToScene(boundingRect()).boundingRect();
            QRectF sceneRect = scene()->sceneRect();

            // 限制控件在场景边界内
            newPos.setX(qMax(sceneRect.left(), qMin(newPos.x(), sceneRect.right() - itemRect.width())));
            newPos.setY(qMax(sceneRect.top(), qMin(newPos.y(), sceneRect.bottom() - itemRect.height())));

            setPos(newPos);
            update();
            event->accept();
            return;
        }
        QGraphicsItem::mouseMoveEvent(event);
}

// 鼠标释放事件处理：结束缩放或拖动
void HmiControlItem::mouseReleaseEvent(QGraphicsSceneMouseEvent* event) {
    m_isScaling = false;
    QGraphicsItem::mouseReleaseEvent(event);
}

// 右键菜单事件处理：显示控件特定的上下文菜单
void HmiControlItem::contextMenuEvent(QGraphicsSceneContextMenuEvent* event) {
    QMenu menu;
    createContextMenu(menu); // 子类实现具体菜单项
    menu.exec(event->screenPos());
    event->accept();
}

// 删除控件：从场景中移除并释放内存
void HmiControlItem::deleteItem() {
    if (scene()) {
        scene()->removeItem(this);
    }
    delete this;
}

// 更改控件颜色：弹出颜色对话框选择ON或OFF状态颜色
void HmiControlItem::changeAppearanceColor(bool isOnState, QColor& onColor, QColor& offColor) {
    QColor newColor = QColorDialog::getColor(
        Qt::white,
        nullptr,
        isOnState ? "选择ON状态颜色" : "选择OFF状态颜色"
    );
    if (newColor.isValid()) {
        if (isOnState) {
            onColor = newColor;
        } else {
            offColor = newColor;
        }
        update();
    }
}

// 设置寄存器绑定
bool HmiControlItem::setRegisterBinding(int address) {
    if (address >= 0 && address <= 4000) {
        m_registerAddress = address;
        return true;
    } else {
        qDebug() << "Invalid register binding: address=" << address;
        return false;
    }
}
// 存储数据到剪贴板
void HmiControlItem::copyToClipboard(const QVariantMap& data) {
    m_clipboardData = data;
    qDebug() << "Copied to clipboard:" << data;
}

// 获取剪贴板数据
QVariantMap HmiControlItem::getClipboardData() {
    return m_clipboardData;
}

// 检查剪贴板是否有数据
bool HmiControlItem::hasClipboardData() {
    return !m_clipboardData.isEmpty();
}

// 从剪贴板数据创建控件，指定粘贴位置
HmiControlItem* HmiControlItem::createFromClipboard(const QVariantMap& data, const QPointF& pos, QGraphicsItem* parent) {
    QString type = data.value("type").toString();
    HmiControlItem* item = nullptr;
    if (type == "按钮") {
        // 创建按钮控件并恢复属性
        item = new HmiButton(parent);
        HmiButton* button = static_cast<HmiButton*>(item);
        button->setButtonState(data.value("isButtonOn", false).toBool());
        button->setOnColor(QColor(data.value("onColor").toString()));
        button->setOffColor(QColor(data.value("offColor").toString()));
    } else if (type == "指示灯") {
        // 创建指示灯控件并恢复属性
        item = new HmiLed(parent);
        HmiLed* led = static_cast<HmiLed*>(item);
        led->setOnColor(QColor(data.value("onColor").toString()));
        led->setOffColor(QColor(data.value("offColor").toString()));
    }
    if (item) {
        // 设置粘贴位置
        item->setPos(pos);
        // 恢复缩放
        qreal scaleX = data.value("scaleX", 1.0).toDouble();
        qreal scaleY = data.value("scaleY", 1.0).toDouble();
        item->setTransform(QTransform::fromScale(scaleX, scaleY));
        // 恢复寄存器绑定
        item->setRegisterBinding(data.value("registerAddress", -1).toInt());
    }
    return item;
}

// 创建右键菜单（默认实现，子类可扩展）
void HmiControlItem::createContextMenu(QMenu& menu) {
    // 默认添加"设置寄存器"选项
    QAction* setRegisterAction = new QAction("设置寄存器", &menu);
    QObject::connect(setRegisterAction, &QAction::triggered, [this]() {
        bool ok;
        // 显示当前绑定的寄存器地址作为默认值
        int currentAddress = m_registerAddress >= 0 ? m_registerAddress : 0;
        int address = QInputDialog::getInt(nullptr,
            "输入寄存器地址",
            QString("地址 (0-4000):\n当前地址: %1").arg(currentAddress),
            currentAddress, 0, 4000, 1, &ok);
        if (ok) {
            if (!setRegisterBinding(address)) {
                QMessageBox::warning(nullptr, "错误", "无效的寄存器地址");
            }
        }
    });
    menu.addAction(setRegisterAction);
}
// 存储控件数据到剪贴板（默认实现）
QVariantMap HmiControlItem::saveToClipboard() const
{
    QVariantMap data;
    data["type"] = getItemType();
    data["posX"] = pos().x();
    data["posY"] = pos().y();
    data["scaleX"] = transform().m11();
    data["scaleY"] = transform().m22();
    data["registerAddress"] = m_registerAddress;
    return data;
}