// registermanager.cpp
#include "registermanager.h"
#include "item.h"

RegisterManager::RegisterManager(QObject *parent) : QObject(parent) {}

void RegisterManager::bindItem(Item* item, const QString& registerId)
{
    if (registerId.isEmpty() || !item) return;

    // 添加到映射表
    registerMap[registerId].append(item);

    // 连接图元销毁信号
    connect(item, &Item::destroyed, this, [this, item, registerId](){
        if (registerMap.contains(registerId)) {
            registerMap[registerId].removeAll(item);
            if (registerMap[registerId].isEmpty()) {
                registerMap.remove(registerId);
            }
        }
    });
}

void RegisterManager::unbindItem(Item *item, const QString &registerId)
{
    if (registerMap.contains(registerId)) {
        // 从寄存器映射中移除元件
        QList<Item*>& items = registerMap[registerId];
        items.removeAll(item);

        // 如果列表为空则移除整个条目
        if (items.isEmpty()) {
            registerMap.remove(registerId);
        }

        // 断开该寄存器的销毁信号连接
        disconnect(item, &Item::destroyed, this, nullptr);
    }
}

void RegisterManager::updateRegisterValue(const QString& registerId, quint16 value)
{
    if (!registerMap.contains(registerId)) return;

    // 更新所有绑定该寄存器的图元
    for (Item* item : registerMap[registerId]) {
        item->setRegisterValue(registerId, value);
        item->update(); // 刷新显示
    }
}

QStringList RegisterManager::getAllRegisteredRegisters() const
{
    return registerMap.keys();
}

QList<Item*> RegisterManager::getItemsForRegister(const QString& registerId) const
{
    return registerMap.value(registerId, QList<Item*>());
}