#include "nmAttrRegistry.h"
#include "nmDataAttribute.h"

nmAttrRegistry::nmAttrRegistry(QObject* parent)
    : QObject(parent)
    , m_bSyncing(false)
{
}

nmAttrRegistry::~nmAttrRegistry()
{
    // 映射中的指针不拥有所有权，不需 delete
    // nmDataAttribute 的 destroyed 信号已自动清理映射
    m_nameToPtr.clear();
    m_ptrToName.clear();
}

void nmAttrRegistry::regAttr(QString name, nmDataAttribute* pAttr)
{
    if (name.isEmpty() || pAttr == nullptr) {
        return;
    }

    // 如果同名已注册，先断开旧连接
    if (m_nameToPtr.contains(name)) {
        nmDataAttribute* pOld = m_nameToPtr[name];
        if (pOld != nullptr && pOld != pAttr) {
            disconnect(pOld, SIGNAL(sigValueChanged()), this, SLOT(onAttrValueChanged()));
            disconnect(pOld, SIGNAL(destroyed(QObject*)), this, SLOT(onAttrDestroyed(QObject*)));
            m_ptrToName.remove(pOld);
        }
    }

    // 如果同指针已注册（换名），先清理旧名
    if (m_ptrToName.contains(pAttr)) {
        QString oldName = m_ptrToName[pAttr];
        if (oldName != name) {
            m_nameToPtr.remove(oldName);
        }
    }

    m_nameToPtr[name] = pAttr;
    m_ptrToName[pAttr] = name;

    // 连接 nmDataAttribute 的信号
    connect(pAttr, SIGNAL(sigValueChanged()),
            this, SLOT(onAttrValueChanged()));
    connect(pAttr, SIGNAL(destroyed(QObject*)),
            this, SLOT(onAttrDestroyed(QObject*)));
}

void nmAttrRegistry::clear()
{
    // 断开所有 nmDataAttribute 的信号连接
    QMap<nmDataAttribute*, QString>::iterator iter = m_ptrToName.begin();
    for (; iter != m_ptrToName.end(); iter++) {
        nmDataAttribute* pAttr = iter.key();
        if (pAttr != nullptr) {
            disconnect(pAttr, SIGNAL(sigValueChanged()), this, SLOT(onAttrValueChanged()));
            disconnect(pAttr, SIGNAL(destroyed(QObject*)), this, SLOT(onAttrDestroyed(QObject*)));
        }
    }

    m_nameToPtr.clear();
    m_ptrToName.clear();
}

QMap<QString, QVariant> nmAttrRegistry::collect(const QStringList& names) const
{
    QMap<QString, QVariant> mapResult;
    for (int i = 0; i < names.size(); i++) {
        QString name = names[i];
        nmDataAttribute* pAttr = m_nameToPtr.value(name, nullptr);
        if (pAttr != nullptr) {
            mapResult[name] = pAttr->getValue();
        }
    }
    return mapResult;
}

void nmAttrRegistry::setValue(QString name, QVariant value)
{
    nmDataAttribute* pAttr = m_nameToPtr.value(name, nullptr);
    if (pAttr == nullptr) {
        return;
    }

    m_bSyncing = true;
    pAttr->setValue(value);       // → nmDataAttribute 发 sigValueChanged
                                   // → onAttrValueChanged 检测 m_bSyncing=true → 跳过 sigAttrChanged
    m_bSyncing = false;
}

void nmAttrRegistry::onAttrValueChanged()
{
    nmDataAttribute* pAttr = qobject_cast<nmDataAttribute*>(sender());
    if (pAttr == nullptr) {
        return;
    }

    // 防循环：UI→Data 链路中跳过
    if (m_bSyncing) {
        return;
    }

    QString name = m_ptrToName.value(pAttr, "");
    if (name.isEmpty()) {
        return;
    }

    emit sigAttrChanged(name, pAttr->getValue());
}

void nmAttrRegistry::onAttrDestroyed(QObject* pObj)
{
    // nmDataAttribute 析构时发出 destroyed，此时对象已部分销毁
    // 只用指针值做 key，不访问任何成员
    nmDataAttribute* pAttr = static_cast<nmDataAttribute*>(pObj);

    QString name = m_ptrToName.value(pAttr, "");
    if (!name.isEmpty()) {
        m_nameToPtr.remove(name);
    }
    m_ptrToName.remove(pAttr);
}