#include "baseChannel.h"
#include <QDateTime>
#include <QCryptographicHash>
#include <QDebug>

BaseChannel::BaseChannel(const ChannelConfig& config, QObject* parent)
    : QObject(parent)
    , m_config(config)
    , m_reconnectTimer(new QTimer(this))
{
    m_reconnectTimer->setSingleShot(true);
    QObject::connect(m_reconnectTimer,&QTimer::timeout, this, &BaseChannel::onReconnectTimeout);

    qDebug() << "BaseChannel created:" << m_config.channelId;
}

BaseChannel::~BaseChannel()
{
    stopReconnectTimer();
    qDebug() << "BaseChannel destroyed:" << m_config.channelId;
}

void BaseChannel::setAutoReconnect(bool enable)
{
    m_autoReconnect = enable;
    if (!enable) {
        stopReconnectTimer();
    }
}

void BaseChannel::startReconnectTimer()
{
    if (m_autoReconnect && m_reconnectCount < m_config.maxRetries) {
        int delay = m_config.reconnectInterval * (1 << m_reconnectCount); // 指数退避
        m_reconnectTimer->start(qMin(delay, 30000)); // 最大30秒
        m_reconnectCount++;
    }
}

void BaseChannel::stopReconnectTimer()
{
    m_reconnectTimer->stop();
    m_reconnectCount = 0;
}

void BaseChannel::reconnect()
{
    if (m_autoReconnect) {
        disconnect();
        QTimer::singleShot(100, this, [this]() {
            connect();
        });
    }
}

void BaseChannel::onReconnectTimeout()
{
    if (m_autoReconnect) {
        qDebug() << "Reconnecting channel" << m_config.channelId
                 << "attempt" << m_reconnectCount << "/" << m_config.maxRetries;
        connect();
    }
}

QByteArray BaseChannel::generateMessageId() const
{
    QString id = QString("%1_%2")
    .arg(m_config.channelId)
        .arg(QDateTime::currentMSecsSinceEpoch());
    return QCryptographicHash::hash(id.toUtf8(), QCryptographicHash::Md5).toHex();
}

qint64 BaseChannel::currentTimestamp() const
{
    return QDateTime::currentMSecsSinceEpoch();
}