// LayoutBuilder.h
#pragma once
#include <QGraphicsLinearLayout>
#include "editContainerItem.h"
#include "dataModel.h"
#include "common/core_model/topology.h"

class EditPanel;
class EditBaseItem;

class LayoutBuilder {
public:
    struct BuildResult {
        EditContainerItem* container = nullptr;
        QList<HierarchyItem> bayItems;
        QList<HierarchyItem> deviceItems;
    };

    explicit LayoutBuilder(EditPanel* panel);
    virtual ~LayoutBuilder() = default;

    // 构建一个容器
    virtual BuildResult buildContainer(const BlockMap& blockMap);

    // 构建行布局
    static QGraphicsLinearLayout* createRowLayout();

    // 构建垂直布局
    static QGraphicsLinearLayout* createVerticalLayout();

    // 构建水平布局
    static QGraphicsLinearLayout* createHorizontalLayout();

    // 添加间隔占位符
    static EditBaseItem* createSpacerItem();

    // 为垂直布局添加拉伸
    static void addStretchToVerticalLayout(QGraphicsLinearLayout* layout);

protected:
    EditPanel* m_panel = nullptr;

    // 处理一个Block
    virtual EditBaseItem* processBlock(BlockDataPtr block,
                                       QList<HierarchyItem>& bayItems,
                                       QList<HierarchyItem>& deviceItems);

    // 处理一个层的所有Blocks
    void processLayer(const QList<BlockDataPtr>& blocks,
                      QGraphicsLinearLayout* layerLayout,
                      QList<HierarchyItem>& bayItems,
                      QList<HierarchyItem>& deviceItems);

    // 连接信号
    void connectSignals(EditBaseItem* item);
    void connectContainerSignals(EditContainerItem* container);

protected:
    static constexpr int TOTAL_LAYERS = 4;  // 总共4层
    static constexpr int MIN_CONTAINER_WIDTH = 100;  // 最小容器宽度
};