/*!
 *
 * Copyright (c) 2026 Diality Inc. - All Rights Reserved.
 * \copyright
 * THIS CODE MAY NOT BE COPIED OR REPRODUCED IN ANY FORM, IN PART OR IN
 * WHOLE, WITHOUT THE EXPLICIT PERMISSION OF THE COPYRIGHT OWNER.
 *
 * \file    main.cpp
 * \author  (original)  Stephen Quong
 * \date    (original)  30-Jul-2026
 *
 */
#include <QCommandLineOption>
#include <QCommandLineParser>
#include <QCoreApplication>

#include "DCSSimController.h"

constexpr quint16 DEFAULT_MQTT_PORT = 1883;

int main(int argc, char *argv[])
{
    QCoreApplication app(argc, argv);
    QCoreApplication::setApplicationName("DCSsim");

    QCommandLineParser parser;
    parser.setApplicationDescription("Diality Cloud System simulator");
    parser.addHelpOption();

    QCommandLineOption portOption(QStringList() << "p" << "port",
        "TCP listening port", "port", QString::number(DEFAULT_MQTT_PORT));
    QCommandLineOption certOption("cert", "Server certificate PEM; enables TLS (requires --key).", "file");
    QCommandLineOption keyOption("key", "Server private key PEM.", "file");
    QCommandLineOption caOption("ca", "CA bundle PEM; clients must present a certificate it signs (mTLS).", "file");
    parser.addOption(portOption);
    parser.addOption(certOption);
    parser.addOption(keyOption);
    parser.addOption(caOption);
    parser.process(app);

    bool ok = false;
    const uint port = parser.value(portOption).toUInt(&ok);
    if (!ok || port == 0 || port > 65535) {
        qCritical().noquote() << "DCSsim: invalid port" << parser.value(portOption);
        return 1;
    }

    if (parser.isSet(certOption) != parser.isSet(keyOption)) {
        qCritical().noquote() << "DCSsim: --cert and --key must be given together";
        return 1;
    }
    if (parser.isSet(caOption) && !parser.isSet(certOption)) {
        qCritical().noquote() << "DCSsim: --ca requires --cert and --key";
        return 1;
    }

    DCSSimController::TlsConfig tls;
    tls.certPath = parser.value(certOption);
    tls.keyPath  = parser.value(keyOption);
    tls.caPath   = parser.value(caOption);

    DCSSimController simController(static_cast<quint16>(port), tls);
    if (!simController.listen()) {
        return 1;
    }

    return app.exec();
}