#include "TcpServer.h"
#include "Log.h"
#include <QTcpSocket>

TcpServer::TcpServer(QObject* parent)
    : QTcpServer(parent)
{
    handler = new TcpRequestHandler();

    connect(this, &TcpServer::newConnection, this, &TcpServer::onNewConnect);
}

TcpServer::~TcpServer()
{
    delete handler;
    if (!clients.isEmpty()) {
        qDeleteAll(clients);
        clients.clear();
    }
}

/**
 * @brief 监听端口
 */
void TcpServer::listen()
{
    bool ret = QTcpServer::listen(QHostAddress::Any, 8080);
    if (!ret) {
        Log::error(QString("listen port 8080 failed, %1").arg(errorString()).toStdString());
        return;
    } else {
        Log::info("start tcp server, listen port 8080");
    }
}

/**
 * @brief 关闭tcp服务器
 */
void TcpServer::close()
{
    QTcpServer::close();
    if (!clients.isEmpty()) {
        qDeleteAll(clients);
        clients.clear();
    }
}

/**
 * @brief 服务器有新的连接
 */
void TcpServer::onNewConnect()
{
    if (this->hasPendingConnections()) {
        QTcpSocket* socket = this->nextPendingConnection();
        Log::info("new client connected, ip: {}", socket->peerAddress().toString().toStdString());
        TcpConnectionHandler* connection = new TcpConnectionHandler(socket, handler);
        clients.push_back(connection);

        connect(connection, &TcpConnectionHandler::disconnected, [=] {
            // 从列表中移除该指针
            TcpConnectionHandler* conn = static_cast<TcpConnectionHandler*>(sender());
            clients.removeOne(conn);
        });
    }
}