#include "qtradecore.h"
#include <QDebug>
#include <QCoreApplication>

QTradeCore* QTradeCore::instance()
{
    static QTradeCore* instance = nullptr;
    static QMutex mutex;
    
    if (!instance) {
        QMutexLocker locker(&mutex);
        if (!instance) {
            instance = new QTradeCore();
        }
    }
    return instance;
}

QTradeCore::QTradeCore(QObject *parent) : QObject(parent)
{
    // 延迟初始化，在initialize()方法中创建实例
}

QTradeCore::~QTradeCore()
{
    shutdown();
}

void QTradeCore::initialize()
{
    if (m_initialized) {
        qWarning() << "QTradeCore: Already initialized";
        return;
    }
    
    qDebug() << "QTradeCore: Initializing...";
    
    try {
        // 初始化事件总线
        m_eventBus = QEventBus::instance();
        
        // 初始化订阅管理器
        m_subscriptionManager = QSubscriptionManager::instance();
        
        // 初始化大单管理器
        m_bigOrderManager = QBigOrderManager::instance();
        
        // 初始化日志管理器
        m_logManager = QLogManager::Instance();
        
        // 初始化订单处理器
        m_orderProcessor = new QOrderProcessor(this);
        
        // 设置初始状态
        m_initialized = true;
        
        qDebug() << "QTradeCore: Initialization completed successfully";
        emit systemInitialized();
        
    } catch (const std::exception& e) {
        qCritical() << "QTradeCore: Initialization failed:" << e.what();
        emit errorOccurred(QString("Initialization failed: %1").arg(e.what()));
    }
}

void QTradeCore::shutdown()
{
    if (!m_initialized) {
        return;
    }
    
    qDebug() << "QTradeCore: Shutting down...";
    
    // 清理资源
    if (m_orderProcessor) {
        delete m_orderProcessor;
        m_orderProcessor = nullptr;
    }
    
    // 注意：单例对象由它们自己管理生命周期
    // 我们只清理我们直接创建的对象
    
    m_initialized = false;
    
    qDebug() << "QTradeCore: Shutdown completed";
    emit systemShutdown();
}

QSubscriptionManager* QTradeCore::subscriptionManager()
{
    if (!m_initialized) {
        qWarning() << "QTradeCore: Not initialized, cannot access subscription manager";
        return nullptr;
    }
    return m_subscriptionManager;
}

QOrderProcessor* QTradeCore::orderProcessor()
{
    if (!m_initialized) {
        qWarning() << "QTradeCore: Not initialized, cannot access order processor";
        return nullptr;
    }
    return m_orderProcessor;
}

QBigOrderManager* QTradeCore::bigOrderManager()
{
    if (!m_initialized) {
        qWarning() << "QTradeCore: Not initialized, cannot access big order manager";
        return nullptr;
    }
    return m_bigOrderManager;
}

QLogManager* QTradeCore::logManager()
{
    if (!m_initialized) {
        qWarning() << "QTradeCore: Not initialized, cannot access log manager";
        return nullptr;
    }
    return m_logManager;
}

QEventBus* QTradeCore::eventBus()
{
    if (!m_initialized) {
        qWarning() << "QTradeCore: Not initialized, cannot access event bus";
        return nullptr;
    }
    return m_eventBus;
}

QString QTradeCore::getSystemStatus() const
{
    QString status;
    
    if (m_initialized) {
        status = "System is running\n";
        
        // Build component list manually to avoid lambda issues
        QStringList components;
        if (m_subscriptionManager) components << "SubscriptionManager";
        if (m_orderProcessor) components << "OrderProcessor";
        if (m_bigOrderManager) components << "BigOrderManager";
        if (m_logManager) components << "LogManager";
        if (m_eventBus) components << "EventBus";
        
        status += QString("Components: %1\n").arg(components.join(", "));
    } else {
        status = "System is not initialized";
    }
    
    return status;
}