// Copyright (c) 2014-2019, The Monero Project
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without modification, are
// permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this list of
//    conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice, this list
//    of conditions and the following disclaimer in the documentation and/or other
//    materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its contributors may be
//    used to endorse or promote products derived from this software without specific
//    prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#include "network.h"

#include <QDebug>
#include <QtCore>

// TODO: wallet_merged - epee library triggers the warnings
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wunused-parameter"
#pragma GCC diagnostic ignored "-Wreorder"
#include <net/http_client.h>
#pragma GCC diagnostic pop

#include "utils.h"

Network::Network(QObject *parent)
    : QObject(parent)
    , m_scheduler(this)
{
}

void Network::get(const QString &url, const QJSValue &callback, const QString &contentType) const
{
    qDebug() << QString("Fetching: %1").arg(url);

    m_scheduler.run(
        [url, contentType] {
            epee::net_utils::http::http_simple_client httpClient;

            const QUrl urlParsed(url);
            httpClient.set_server(urlParsed.host().toStdString(), urlParsed.scheme() == "https" ? "443" : "80", {});

            const QString uri = (urlParsed.hasQuery() ? urlParsed.path() + "?" + urlParsed.query() : urlParsed.path());
            const epee::net_utils::http::http_response_info *pri = NULL;
            constexpr std::chrono::milliseconds timeout = std::chrono::seconds(15);

            epee::net_utils::http::fields_list headers({{"User-Agent", randomUserAgent().toStdString()}});
            if (!contentType.isEmpty())
            {
                headers.push_back({"Content-Type", contentType.toStdString()});
            }
            const bool result = httpClient.invoke(uri.toStdString(), "GET", {}, timeout, std::addressof(pri), headers);

            if (!result)
            {
                return QJSValueList({QJSValue(), QJSValue(), "unknown error"});
            }
            if (!pri)
            {
                return QJSValueList({QJSValue(), QJSValue(), "internal error (null response ptr)"});
            }
            if (pri->m_response_code != 200)
            {
                return QJSValueList({QJSValue(), QJSValue(), QString("response code: %1").arg(pri->m_response_code)});
            }

            return QJSValueList({url, QString::fromStdString(pri->m_body)});
        },
        callback);
}

void Network::getJSON(const QString &url, const QJSValue &callback) const
{
    get(url, callback, "application/json; charset=utf-8");
}