#pragma once
#include "editorwidget.h"
#include <QLabel>
#include <QPushButton>
#include <QListWidgetItem>
#include <QKeyEvent>
#include <QEvent>
#include <QGraphicsScene>

class HmiControlItem;

/**
 * @brief HMI (Human Machine Interface) 图形编辑器控件
 *
 * 继承自 EditorWidget，扩展了多页面管理、点击放置与“旁边粘贴”
 */
class HmiEditorWidget : public EditorWidget {
    Q_OBJECT

public:
    explicit HmiEditorWidget(QWidget* parent = nullptr);
    ~HmiEditorWidget();

    // 页面管理接口
    QGraphicsScene* getCurrentScene() const override;
    QList<QGraphicsScene*> getPages() const override { return m_pages; }
    int getCurrentPageIndex() const override { return m_currentPageIndex; }
    void clearPages() override;
    void createNewPage();
    void switchToPage(int index);
    void refreshView();

protected:
    // 覆盖 EditorWidget 接口
    void initToolbar() override;
    void onToolbarItemClicked(QListWidgetItem* item) override;
    void keyPressEvent(QKeyEvent* event) override;
    bool eventFilter(QObject* obj, QEvent* event) override;
    void resizeEvent(QResizeEvent* event) override;
    void showEvent(QShowEvent* event) override;

private slots:
    void onNewPageClicked();
    void onDeletePageClicked();
    void onPreviousPageClicked();
    void onNextPageClicked();

private:
    // —— 辅助 —— //
    void initViewScale();
    void updatePageLabel();

    // 根据类型名创建控件并放到 scenePos 上；成功返回新控件指针
    HmiControlItem* createItemByType(const QString& type, const QPointF& scenePos);

    // 设置/清除“放置模式”的鼠标提示
    void setPlacingCursor(bool on);

    // 计算“在原控件旁边”的粘贴位置（第 n 次粘贴做轻微错行）
    QPointF calcPasteBesidePos(HmiControlItem* src, int pasteIndex = 0) const;

private:
    // 页面
    QList<QGraphicsScene*> m_pages;
    int m_currentPageIndex = -1;

    // UI
    QLabel* m_pageLabel = nullptr;
    QPushButton* m_newPageButton = nullptr;
    QPushButton* m_deletePageButton = nullptr;
    QPushButton* m_prevPageButton = nullptr;
    QPushButton* m_nextPageButton = nullptr;

    // 交互状态：待放置的控件类型（与工具栏 item 的 UserRole 文本一致：如 “按钮”“指示灯”）
    QString m_pendingType;
};