#ifndef DATAPROTOTYPE_H
#define DATAPROTOTYPE_H

#include <QString>
#include <QList>

class RuntimeItem;

/**
 * @brief 实体观察接口
 */
class ItemListener{
public:
    virtual ~ItemListener() = default;
    
    virtual void itemHasbeenUpdated(std::shared_ptr<const RuntimeItem> current, std::shared_ptr<const RuntimeItem> previous) = 0;
    
    virtual void memberHasbeenAppended(const RuntimeItem &parent, std::shared_ptr<const RuntimeItem> inst) = 0;
    virtual void memberAboutToBeRemove(const RuntimeItem &parent, std::shared_ptr<const RuntimeItem> inst) = 0;
    virtual void memberHasbeenReplaced(const RuntimeItem &parent, std::shared_ptr<const RuntimeItem> current, std::shared_ptr<const RuntimeItem> previous) = 0; 
};


/**
 * @brief 聚合体类型
 */
enum class AssembleType {
    DATAS_ASSEMBLE,     // 数据聚合体
    MODULES_UNIT,       // 模块单元
};

/**
 * @brief 内存实例接口
 */
class RuntimeItem : public std::enable_shared_from_this<RuntimeItem> {
public:
    explicit RuntimeItem(AssembleType t);
    explicit RuntimeItem(const RuntimeItem & other);
    
    std::shared_ptr<const RuntimeItem> add(std::shared_ptr<ItemListener> inst) const;
    std::shared_ptr<const RuntimeItem> del(std::shared_ptr<ItemListener> inst) const;
    void itemNotify(std::function<void(std::shared_ptr<ItemListener>)> proc) const;
    
    AssembleType baseType() const;
    virtual qulonglong hashCode() const;
    virtual std::shared_ptr<const RuntimeItem> clone() const;
    
private:
    AssembleType type_store;
    QList<std::shared_ptr<ItemListener>> listener_collection;
};

/**
 * @brief 下行实体访问接口
 */
class DownAccess : public std::enable_shared_from_this<DownAccess>{
public:
    explicit DownAccess(std::shared_ptr<const RuntimeItem> peer);
    explicit DownAccess(const DownAccess &other);
    
    template<typename T>
    std::shared_ptr<const T> typePeer() const {
        return std::dynamic_pointer_cast<const T>(itemPeer());
    }
    std::shared_ptr<const RuntimeItem> itemPeer() const;
    QList<std::shared_ptr<const DownAccess>> members() const;
    
    std::shared_ptr<const DownAccess> append(std::shared_ptr<const DownAccess> child_inst) const;
    std::shared_ptr<const DownAccess> remove(std::shared_ptr<const DownAccess> child_inst) const;
    std::shared_ptr<const DownAccess> replace(std::shared_ptr<const DownAccess> current, std::shared_ptr<const DownAccess> previous) const;
    
    virtual std::shared_ptr<const DownAccess> clone() const;
    
private:
    std::shared_ptr<const RuntimeItem> runtime_item;
    QList<std::shared_ptr<const DownAccess>> children_store;
};

/**
 * @brief 上行访问接口
 */
class UpAccess : public std::enable_shared_from_this<UpAccess> {
public:
    explicit UpAccess(std::shared_ptr<const UpAccess> parent, std::shared_ptr<const DownAccess> down);
    explicit UpAccess(const UpAccess &other);
    
    template<typename T>
    std::shared_ptr<const T> typePeer() const {
        return std::dynamic_pointer_cast<const T>(itemPeer());
    }
    std::shared_ptr<const DownAccess> downwardPeers() const;
    std::shared_ptr<const UpAccess> parent() const;
    virtual std::shared_ptr<const UpAccess> clone() const;

private:
    std::shared_ptr<const DownAccess> runtime_downward;
    std::shared_ptr<const UpAccess> parent_ptr;
};

/**
 * @brief 定义数据传输方向
 */
enum class DataOritation {
    INPUT,          // 引入
    OUTPUT,         // 输出
    CONSUME,        // 引入消耗
    GENERATE,       // 引出生成
    UNDEFINED,      // 未定义
};
/**
 * @brief 数据接口
 */
class TypeTemplate : public RuntimeItem
{
private:
    QString name_store = "foo";
    QString type_store = "整形";
    DataOritation io_type = DataOritation::UNDEFINED;
    QHash<qulonglong, std::pair<std::shared_ptr<const TypeTemplate>, QString>> comps_store;
    
public:
    explicit TypeTemplate();
    explicit TypeTemplate(const TypeTemplate & other);

    QString name() const;
    std::shared_ptr<const TypeTemplate> setName(const QString &val) const;
    
    QString type() const;
    std::shared_ptr<const TypeTemplate> setType(const QString &val) const;
    
    DataOritation oritation() const;
    std::shared_ptr<const TypeTemplate> setOritation(DataOritation t) const;
    
    virtual std::shared_ptr<const RuntimeItem> clone() const;
};

#endif // DATAPROTOTYPE_H