// SPDX-License-Identifier: LGPL-3.0-or-later

/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
*
* Copyright (C) 2013 - 2024, nymea GmbH
* Copyright (C) 2024 - 2025, chargebyte austria GmbH
*
* This file is part of libnymea-app.
*
* libnymea-app is free software: you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation, either version 3
* of the License, or (at your option) any later version.
*
* libnymea-app is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with libnymea-app. If not, see <https://www.gnu.org/licenses/>.
*
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

#include "websockettransport.h"

#include <QCoreApplication>
#include <QJsonDocument>
#include <QJsonParseError>
#include <QSettings>

WebsocketTransport::WebsocketTransport(QObject *parent) :
    NymeaTransportInterface(parent)
{
    m_socket = new QWebSocket(QCoreApplication::applicationName(), QWebSocketProtocol::VersionLatest, this);

    QObject::connect(m_socket, &QWebSocket::connected, this, &WebsocketTransport::connected);
    QObject::connect(m_socket, &QWebSocket::disconnected, this, &WebsocketTransport::disconnected);
    typedef void (QWebSocket:: *errorSignal)(QAbstractSocket::SocketError);
    QObject::connect(m_socket, static_cast<errorSignal>(&QWebSocket::error), this, &WebsocketTransport::error);
    QObject::connect(m_socket, &QWebSocket::textMessageReceived, this, &WebsocketTransport::onTextMessageReceived);

    typedef void (QWebSocket:: *sslErrorsSignal)(const QList<QSslError> &);
    QObject::connect(m_socket, static_cast<sslErrorsSignal>(&QWebSocket::sslErrors),this, &WebsocketTransport::sslErrors);
}

bool WebsocketTransport::connect(const QUrl &url)
{
    m_url = url;
    m_socket->open(QUrl(url));
    return true;
}

QUrl WebsocketTransport::url() const
{
    return m_url;
}

NymeaTransportInterface::ConnectionState WebsocketTransport::connectionState() const
{
    switch (m_socket->state()) {
    case QAbstractSocket::ConnectedState:
        return NymeaTransportInterface::ConnectionStateConnected;
    case QAbstractSocket::ConnectingState:
    case QAbstractSocket::HostLookupState:
        return NymeaTransportInterface::ConnectionStateConnecting;
    default:
        return NymeaTransportInterface::ConnectionStateDisconnected;
    }

}

void WebsocketTransport::disconnect()
{
    m_socket->close();
    m_socket->abort();
}

void WebsocketTransport::sendData(const QByteArray &data)
{
    m_socket->sendTextMessage(QString::fromUtf8(data));
}

void WebsocketTransport::ignoreSslErrors(const QList<QSslError> &errors)
{
    // FIXME: We really should provide the exact errors here, like we do on other transports,
    // however, for some reason I just fail to connect to any wss:// socket if I specify the
    // errors. It would only continue if calling it without errors parameter...

//    m_socket->ignoreSslErrors(errors);

    Q_UNUSED(errors)
    m_socket->ignoreSslErrors();
}

bool WebsocketTransport::isEncrypted() const
{
    return m_url.scheme() == "wss";
}

QSslCertificate WebsocketTransport::serverCertificate() const
{
    return m_socket->sslConfiguration().peerCertificate();
}

void WebsocketTransport::onTextMessageReceived(const QString &data)
{
    emit dataReady(data.toUtf8());
}

NymeaTransportInterface *WebsocketTransportFactory::createTransport(QObject *parent) const
{
    return new WebsocketTransport(parent);
}

QStringList WebsocketTransportFactory::supportedSchemes() const
{
    return {"ws", "wss"};
}