#include "QOrderListManager.h"
#include <QDebug>
QBasicAtomicPointer<QOrderListManager> QOrderListManager::s_instance = QBasicAtomicPointer<QOrderListManager>(nullptr);
QMutex QOrderListManager::s_mutex;
QOrderListManager* QOrderListManager::instance()
{
    if (!s_instance.loadAcquire()) {
        QMutexLocker locker(&s_mutex);
        if (!s_instance.loadAcquire()) {
            s_instance.storeRelease(new QOrderListManager());
        }
    }
    return s_instance.loadAcquire();
}
void QOrderListManager::destroy()
{
    QMutexLocker locker(&s_mutex);
    delete s_instance.loadAcquire();
    s_instance.storeRelease(nullptr);
}
QOrderListManager::QOrderListManager(QObject *parent) : QObject(parent)
{
}
QOrderListManager::~QOrderListManager()
{
}
bool QOrderListManager::addOrder(OrderType type, const OrderBookItem &order)
{
    if (!order.isValid()) {
        qWarning() << "Invalid order data";
        return false;
    }
    QMutexLocker locker(&m_orderMutex);
    auto& orderMap = (type == BidOrder) ? m_bidOrders : m_askOrders;
    auto& orderList = orderMap[order.price];
    for (const auto& existingOrder : orderList) {
        if (existingOrder->orderId == order.orderId) {
            qWarning() << "Order already exists:" << order.orderId;
            return false;
        }
    }
    auto newOrder = QSharedPointer<OrderBookItem>::create(order);
    orderList.append(newOrder);
    sortOrders(type);
    calculatePriceLevels();
    locker.unlock();
    emit orderAdded(type, order);
    emit orderBookChanged();
    return true;
}
bool QOrderListManager::updateOrder(OrderType type, const QString &orderId, const OrderBookItem &newData)
{
    if (!newData.isValid()) {
        qWarning() << "Invalid order data";
        return false;
    }
    QMutexLocker locker(&m_orderMutex);
    auto& orderMap = (type == BidOrder) ? m_bidOrders : m_askOrders;
    bool found = false;
    for (auto it = orderMap.begin(); it != orderMap.end(); ++it) {
        for (auto& order : it.value()) {
            if (order->orderId == orderId) {
                if (order->price != newData.price) {
                    auto orderList = it.value();
                    orderList.removeOne(order);
                    if (orderList.isEmpty()) {
                        orderMap.erase(it);
                    }
                    auto newOrder = QSharedPointer<OrderBookItem>::create(newData);
                    orderMap[newData.price].append(newOrder);
                } else {
                    *order = newData;
                }
                found = true;
                break;
            }
        }
        if (found) break;
    }
    if (!found) {
        qWarning() << "Order not found:" << orderId;
        return false;
    }
    sortOrders(type);
    calculatePriceLevels();
    locker.unlock();
    emit orderUpdated(type, orderId);
    emit orderBookChanged();
    return true;
}
bool QOrderListManager::removeOrder(OrderType type, const QString &orderId)
{
    QMutexLocker locker(&m_orderMutex);
    auto& orderMap = (type == BidOrder) ? m_bidOrders : m_askOrders;
    bool found = false;
    for (auto it = orderMap.begin(); it != orderMap.end(); ++it) {
        for (auto& order : it.value()) {
            if (order->orderId == orderId) {
                auto orderList = it.value();
                orderList.removeOne(order);
                if (orderList.isEmpty()) {
                    orderMap.erase(it);
                }
                found = true;
                break;
            }
        }
        if (found) break;
    }
    if (!found) {
        qWarning() << "Order not found:" << orderId;
        return false;
    }
    calculatePriceLevels();
    locker.unlock();
    emit orderRemoved(type, orderId);
    emit orderBookChanged();
    return true;
}
QSharedPointer<OrderBookItem> QOrderListManager::getOrder(OrderType type, const QString &orderId) const
{
    QMutexLocker locker(&m_orderMutex);
    const auto& orderMap = (type == BidOrder) ? m_bidOrders : m_askOrders;
    for (const auto& orderList : orderMap) {
        for (const auto& order : orderList) {
            if (order->orderId == orderId) {
                return order;
            }
        }
    }
    return nullptr;
}
QMap<double, QList<QSharedPointer<OrderBookItem>>> QOrderListManager::getBidOrders() const
{
    QMutexLocker locker(&m_orderMutex);
    return m_bidOrders;
}
QMap<double, QList<QSharedPointer<OrderBookItem>>> QOrderListManager::getAskOrders() const
{
    QMutexLocker locker(&m_orderMutex);
    return m_askOrders;
}
QMap<double, double> QOrderListManager::getBidPriceLevels() const
{
    QMutexLocker locker(&m_orderMutex);
    return m_bidPriceLevels;
}
QMap<double, double> QOrderListManager::getAskPriceLevels() const
{
    QMutexLocker locker(&m_orderMutex);
    return m_askPriceLevels;
}
double QOrderListManager::getTotalBidVolume() const
{
    QMutexLocker locker(&m_orderMutex);
    double total = 0.0;
    for (const auto& volume : m_bidPriceLevels) {
        total += volume;
    }
    return total;
}
double QOrderListManager::getTotalAskVolume() const
{
    QMutexLocker locker(&m_orderMutex);
    double total = 0.0;
    for (const auto& volume : m_askPriceLevels) {
        total += volume;
    }
    return total;
}
double QOrderListManager::getBestBidPrice() const
{
    QMutexLocker locker(&m_orderMutex);
    if (m_bidOrders.isEmpty()) return 0.0;
    return m_bidOrders.lastKey();
}
double QOrderListManager::getBestAskPrice() const
{
    QMutexLocker locker(&m_orderMutex);
    if (m_askOrders.isEmpty()) return 0.0;
    return m_askOrders.firstKey();
}
void QOrderListManager::sortOrders(OrderType type)
{
    auto& orderMap = (type == BidOrder) ? m_bidOrders : m_askOrders;
    if (type == BidOrder) {
        QMap<double, QList<QSharedPointer<OrderBookItem>>> sortedMap;
        auto keys = orderMap.keys();
        std::sort(keys.begin(), keys.end(), std::greater<double>());
        for (const auto& key : keys) {
            sortedMap.insert(key, orderMap.value(key));
        }
        orderMap = sortedMap;
    } else {
        QMap<double, QList<QSharedPointer<OrderBookItem>>> sortedMap;
        auto keys = orderMap.keys();
        std::sort(keys.begin(), keys.end());
        for (const auto& key : keys) {
            sortedMap.insert(key, orderMap.value(key));
        }
        orderMap = sortedMap;
    }
}
void QOrderListManager::calculatePriceLevels()
{
    m_bidPriceLevels.clear();
    for (auto it = m_bidOrders.constBegin(); it != m_bidOrders.constEnd(); ++it) {
        double totalVolume = 0.0;
        for (const auto& order : it.value()) {
            totalVolume += order->volume;
        }
        m_bidPriceLevels.insert(it.key(), totalVolume);
    }
    m_askPriceLevels.clear();
    for (auto it = m_askOrders.constBegin(); it != m_askOrders.constEnd(); ++it) {
        double totalVolume = 0.0;
        for (const auto& order : it.value()) {
            totalVolume += order->volume;
        }
        m_askPriceLevels.insert(it.key(), totalVolume);
    }
}