#include "hmimodule.h"
#include <QGraphicsScene>
#include <QGraphicsView> // --- 确保包含 QGraphicsView 头文件 ---
#include <QDateTime>

// HMIModule 构造函数无需改动
HMIModule::HMIModule(Ui::MainWindow* ui, QObject *parent)
    : QObject{parent}, ui_(ui), m_scene(nullptr)
{}

// 封装设置图标和大小的通用函数
void HMIModule::setButtonIcon(QAbstractButton *button, const QString &iconPath)
{
    button->setIcon(QIcon(iconPath));
    button->setIconSize(QSize(30, 30));
}

void HMIModule::init() {
    setButtonIcon(ui_->button, ":/resource/image/button.png");
    setButtonIcon(ui_->lamp, ":/resource/image/lamp.png");
    setButtonIcon(ui_->addPage, ":/resource/image/add.png");
    setButtonIcon(ui_->deletePage, ":/resource/image/delete.png");
    setButtonIcon(ui_->prePage, ":/resource/image/pre.png");
    setButtonIcon(ui_->nextPage, ":/resource/image/next.png");

    if (!ui_->hmiGraphicsView->scene()) {
        // 创建场景时，将 view 指针传入
        m_scene = new CustomGraphicsScene(ui_->hmiGraphicsView, this);
        m_scene->setSceneRect(0, 0, 800, 600);
        ui_->hmiGraphicsView->setScene(m_scene);
    } else {
        m_scene = qobject_cast<CustomGraphicsScene*>(ui_->hmiGraphicsView->scene());
        Q_ASSERT(m_scene);
    }

    connect(ui_->button, &QPushButton::clicked, this, &HMIModule::prepareToCreateButton);
    connect(ui_->lamp, &QPushButton::clicked, this, &HMIModule::prepareToCreateIndicator);
    connect(m_scene, &CustomGraphicsScene::componentCreated, this, &HMIModule::onComponentCreated);
    // 连接来自场景的键盘事件信号
    connect(m_scene, &CustomGraphicsScene::copyRequestFromScene, this, &HMIModule::onCopyRequested);
    connect(m_scene, &CustomGraphicsScene::pasteRequestFromScene, this, &HMIModule::onPasteRequested);
    connect(m_scene, &CustomGraphicsScene::deleteRequestFromScene, this, &HMIModule::onDeleteRequested);
}
// 辅助函数，用于设置新创建的组件
void HMIModule::setupNewComponent(HmiComponent* item)
{
    if (!item) return;

    // 连接所有需要的信号
    connect(item, &HmiComponent::selected, this, &HMIModule::onComponentSelected);
    connect(item, &HmiComponent::copyRequested, this, &HMIModule::onCopyRequested);
    connect(item, &HmiComponent::deleteRequested, this, &HMIModule::onDeleteRequested);

    // 生成日志
    QString currentTime = QDateTime::currentDateTime().toString("yyyy-MM-dd hh:mm:ss");
    QString log = QString("[%1] 创建 %2 组件")
                      .arg(currentTime)
                      .arg(item->componentName());
    emit logMessageGenerated(log);
}

// 准备创建按钮的槽函数
void HMIModule::prepareToCreateButton()
{
    m_scene->setComponentTypeToCreate(ComponentType::Button);
    m_scene->setMode(CustomGraphicsScene::Mode::CreateItem);
}

// 准备创建指示灯的槽函数
void HMIModule::prepareToCreateIndicator()
{
    m_scene->setComponentTypeToCreate(ComponentType::Indicator);
    m_scene->setMode(CustomGraphicsScene::Mode::CreateItem);
}

// 处理新创建组件的槽函数
void HMIModule::onComponentCreated(HmiComponent* item)
{
    setupNewComponent(item);
}

void HMIModule::onCopyRequested()
{
    QList<QGraphicsItem*> selected = m_scene->selectedItems();
    if (selected.isEmpty()) return;

    // 只复制第一个选中的项目
    HmiComponent* itemToCopy = qgraphicsitem_cast<HmiComponent*>(selected.first());
    if (!itemToCopy) return;

    // 存储组件信息到 "剪贴板"
    if (dynamic_cast<HmiButton*>(itemToCopy)) {
        m_copiedType = ComponentType::Button;
    } else if (dynamic_cast<HmiIndicator*>(itemToCopy)) {
        m_copiedType = ComponentType::Indicator;
    }
    m_copiedColor = itemToCopy->color();
    m_hasCopiedItem = true;

    // 日志
    emit logMessageGenerated(QString("[%1] 复制组件: %2")
                                 .arg(QDateTime::currentDateTime().toString("yyyy-MM-dd hh:mm:ss"))
                                 .arg(itemToCopy->componentName()));
}

void HMIModule::onPasteRequested(const QPointF& scenePos)
{
    if (!m_hasCopiedItem) return;

    HmiComponent* newItem = nullptr;
    if (m_copiedType == ComponentType::Button) {
        newItem = new HmiButton();
    } else {
        newItem = new HmiIndicator();
    }

    if (newItem) {
        newItem->setColor(m_copiedColor);
        // 为了避免完全重叠，给一个小的偏移量
        newItem->setPos(scenePos);
        m_scene->addItem(newItem);

        // 使用辅助函数完成添加和信号连接
        // 注意：setupNewComponent内部会再次生成“创建”日志，这里是合理的
        setupNewComponent(newItem);
    }
}

void HMIModule::onDeleteRequested()
{
    QList<QGraphicsItem*> selected = m_scene->selectedItems();
    if (selected.isEmpty()) return;

    // 日志
    emit logMessageGenerated(QString("[%1] 删除 %2 个组件")
                                 .arg(QDateTime::currentDateTime().toString("yyyy-MM-dd hh:mm:ss"))
                                 .arg(selected.count()));

    // 从后往前删，避免迭代器失效问题
    for (int i = selected.count() - 1; i >= 0; --i) {
        QGraphicsItem* item = selected.at(i);
        m_scene->removeItem(item);
        delete item; // 释放内存
    }
}

// 统一处理选中事件的槽函数，无需修改
void HMIModule::onComponentSelected(HmiComponent* item)
{
    // if (item) {
    //     qDebug() << "Component selected:" << item->componentName()
    //     << "Color:" << item->color();
    //     // 未来可以在这里将item对象传递给属性编辑器
    // }
}