/****************************************************************************
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** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/
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** This file is part of the test suite of the Qt Toolkit.
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** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
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** file. Please review the following information to ensure the GNU General
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****************************************************************************/

#include "qget.h"
#include <QAuthenticator>
#include <QCoreApplication>
#include <QDebug>
#include <QSslError>

DownloadManager::DownloadManager()
    : queueMode (Parallel)
{
    connect(&nam, SIGNAL(finished(QNetworkReply*)), this, SLOT(finished(QNetworkReply*)));
    connect(&nam, SIGNAL(authenticationRequired(QNetworkReply*, QAuthenticator*)), this, SLOT(authenticationRequired(QNetworkReply*, QAuthenticator*)));
    connect(&nam, SIGNAL(proxyAuthenticationRequired(const QNetworkProxy&, QAuthenticator*)), this, SLOT(proxyAuthenticationRequired(const QNetworkProxy&, QAuthenticator*)));
#ifndef QT_NO_SSL
    connect(&nam, SIGNAL(sslErrors(QNetworkReply*, const QList<QSslError>&)), this, SLOT(sslErrors(QNetworkReply*, const QList<QSslError>&)));
#endif
}

DownloadManager::~DownloadManager()
{

}

void DownloadManager::get(const QUrl &url, const QString &user, const QString &password)
{
    DownloadItem *dl = new DownloadItem(QNetworkRequest(url), user, password, nam);
    transfers.append(dl);
    connect(dl, SIGNAL(downloadFinished(TransferItem*)), SLOT(downloadFinished(TransferItem*)));
}

void DownloadManager::upload(const QUrl &url, const QString &user, const QString &password, const QString &filename, const QString &contentType, TransferItem::Method method)
{
    QScopedPointer<QFile> file(new QFile(filename));
    if (!file->open(QFile::ReadOnly)) {
        qDebug() << "Can't open input file" << file->fileName() << file->errorString();
        return;
    }
    QNetworkRequest request(url);
    if (!contentType.isEmpty())
        request.setHeader(QNetworkRequest::ContentTypeHeader, contentType);
    UploadItem *ul = new UploadItem(request, user, password, nam, file.take(), method);
    transfers.append(ul);
    connect(ul, SIGNAL(downloadFinished(TransferItem*)), SLOT(downloadFinished(TransferItem*)));
}

void DownloadManager::finished(QNetworkReply *reply)
{
}

void DownloadManager::downloadFinished(TransferItem *item)
{
    qDebug() << "finished " << item->reply->url() << " with http status: " << item->reply->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt();
    if (item->reply->error() != QNetworkReply::NoError)
        qDebug() << "and error: " << item->reply->error() << item->reply->errorString();
    transfers.removeOne(item);
    item->deleteLater();
    checkForAllDone();
}

void DownloadManager::checkForAllDone()
{
    if (transfers.isEmpty()) {
        qDebug() << "All Done.";
        QCoreApplication::quit();
    }

    foreach (TransferItem *item, transfers) {
        if (!item->reply) {
            item->start();
            //by default multiple downloads are processed in parallel.
            //but in serial mode, only start one transfer at a time.
            if (queueMode == Serial)
                break;
        }
    }

}

void DownloadManager::authenticationRequired(QNetworkReply *reply, QAuthenticator *auth)
{
    qDebug() << "authenticationRequired" << reply;
    TransferItem *transfer = findTransfer(reply);
    //provide the credentials exactly once, so that it fails if credentials are incorrect.
    if (transfer && !transfer->user.isEmpty() || !transfer->password.isEmpty()) {
        auth->setUser(transfer->user);
        auth->setPassword(transfer->password);
        transfer->user.clear();
        transfer->password.clear();
    }
}

void DownloadManager::proxyAuthenticationRequired(const QNetworkProxy &proxy, QAuthenticator *auth)
{
    //provide the credentials exactly once, so that it fails if credentials are incorrect.
    if (!proxyUser.isEmpty() || !proxyPassword.isEmpty()) {
        auth->setUser(proxyUser);
        auth->setPassword(proxyPassword);
        proxyUser.clear();
        proxyPassword.clear();
    }
}

#ifndef QT_NO_SSL
void DownloadManager::sslErrors(QNetworkReply *reply, const QList<QSslError> &errors)
{
    qDebug() << "sslErrors";
    foreach (const QSslError &error, errors) {
        qDebug() << error.errorString();
        qDebug() << error.certificate().toPem();
    }
}
#endif

TransferItem *DownloadManager::findTransfer(QNetworkReply *reply)
{
    foreach (TransferItem *item, transfers) {
        if (item->reply == reply)
            return item;
    }
    return 0;
}

void DownloadManager::setQueueMode(QueueMode mode)
{
    queueMode = mode;
}