//  This file is part of Friendiqa
//  https://github.com/lubuwest/Friendiqa
//  Copyright (C) 2017 Marco R. <thomasschmidt45@gmx.net>
//
//  This program is free software: you can redistribute it and/or modify
//  it under the terms of the GNU General Public License as published by
//  the Free Software Foundation, either version 3 of the License, or
//  (at your option) any later version.
//
//  In addition, as a special exception, the copyright holders give
//  permission to link the code of portions of this program with the
//  OpenSSL library under certain conditions as described in each
//  individual source file, and distribute linked combinations including
//  the two.
//
//  You must obey the GNU General Public License in all respects for all
//  of the code used other than OpenSSL. If you modify file(s) with this
//  exception, you may extend this exception to your version of the
//  file(s), but you are not obligated to do so. If you do not wish to do
//  so, delete this exception statement from your version. If you delete
//  this exception statement from all source files in the program, then
//  also delete it here.
//
//  This program 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 General Public License for more details.
//
//  You should have received a copy of the GNU General Public License
//  along with this program.  If not, see <http://www.gnu.org/licenses/>.

#include "xhr.h"

#include <QHttpPart>
#include <QTextCodec>
#include <QUrlQuery>
#include <QList>
#include <QDataStream>
#include <QJsonDocument>
#include <QJsonObject>
#include "uploadableimage.h"

XHR *XHR::instance()
{
    static XHR xhr;
    return &xhr;
}

XHR::XHR(QObject *parent) : QObject(parent)
{
    request.setSslConfiguration(QSslConfiguration::defaultConfiguration());
}

void XHR::setUrl(QString url)
{
   if (url!=m_url) {
       m_url = url;
       emit urlChanged();
   }
}

void XHR::setApi(QString api)
{
   if (api!=m_api) {
       m_api = api;
       emit apiChanged();
   }
}

void XHR::setLogin(QString login)
{
   if (login!=m_login) {
       m_login = login;
       emit loginChanged();
   }
}

void XHR::setFilename(QString filename)
{
   if (filename!=m_filename) {
       m_filename = filename;
       emit filenameChanged();
   }
}

void XHR::setContactlist(QList<QString> contactlist)
{
   if (contactlist!=m_contactlist) {
       m_contactlist = contactlist;
       emit contactlistChanged();
   }
}

void XHR::setFilelist(QList<QString> filelist)
{
   if (filelist!=m_filelist) {
       m_filelist = filelist;
       emit filelistChanged();
   }
}

void XHR::setImagedir(QString imagedir)
{
   if (imagedir!=m_imagedir) {
       m_imagedir = imagedir;
       emit imagedirChanged();
   }
}
void XHR::setDownloadtype(QString downloadtype)
{
   if (downloadtype!=m_downloadtype) {
       m_downloadtype = downloadtype;
       emit downloadtypeChanged();
   }
}

QString XHR::url() const
{
    return m_url;
}

QString XHR::api() const
{
    return m_api;
}

QString XHR::login() const
{
    return m_login;
}

QString XHR::filename() const
{
    return m_filename;
}

QList<QString> XHR::contactlist() const
{
    return m_contactlist;
}

QList<QString> XHR::filelist() const
{
    return m_filelist;
}

QString XHR::imagedir() const
{
    return m_imagedir;
}

QString XHR::downloadtype() const
{
    return m_downloadtype;
}

QString XHR::networktype()
{
    return nc.bearerTypeFamily() + nc.bearerTypeName();
}

void XHR::setParam(QString name, QString value)
{
    params.insert(name, value);
}

void XHR::setImageFileParam(QString name, QString url)
{
    files.insert(name, url);
}

void XHR::clearParams()
{
    files.clear();
    params.clear();
}

void XHR::download()
{
    QUrl requrl(m_url);
    if(m_downloadtype=="picturelist"){
        QByteArray loginData = m_login.toLocal8Bit().toBase64();
        QString headerData = "Basic " + loginData;
        request.setRawHeader("Authorization", headerData.toLocal8Bit());
    }
    request.setUrl(requrl);
    reply = manager.get(request);
    reply->ignoreSslErrors();
    connect(reply, &QNetworkReply::readyRead,this, &XHR::onReadyRead);
    //connect(reply,SIGNAL(downloadProgress(qint64,qint64)), this,SLOT(updateDownloadProgress(qint64,qint64)));
    connect(reply, &QNetworkReply::finished,this, &XHR::onRequestFinished);
    connect(reply, &QNetworkReply::sslErrors, this, &XHR::onSSLError);
    connect(reply, SIGNAL(error(QNetworkReply::NetworkError)), this, SLOT(onReplyError(QNetworkReply::NetworkError)));
}

void XHR::get()
{
    QUrlQuery query;

    QHashIterator<QString, QString> i(params);
    while(i.hasNext()) {
        i.next();
        query.addQueryItem(i.key(), i.value());
        //qDebug()<<i.key() << " value "<< i.value();
    }

    QUrl requrl(m_url+m_api);
    //qDebug() << "API "<< requrl<<m_api;
    requrl.setQuery(query);
    QByteArray loginData = m_login.toLocal8Bit().toBase64();
    QString headerData = "Basic " + loginData;
    request.setRawHeader("Authorization", headerData.toLocal8Bit());
    request.setUrl(requrl);
    reply = manager.get(request);

    connect(reply, &QNetworkReply::finished, this, &XHR::onReplySuccess);
    connect(reply, SIGNAL(error(QNetworkReply::NetworkError)), this, SLOT(onReplyError(QNetworkReply::NetworkError)));
    connect(reply, &QNetworkReply::readyRead, this, &XHR::onReadyRead);
    connect(reply, &QNetworkReply::sslErrors, this, &XHR::onSSLError);
}

void XHR::getlist()
{
    if(dlindex < m_filelist.size()) {
        QString cleanfilename;
        if (m_downloadtype=="contactlist"){cleanfilename = m_contactlist.at(dlindex)+"-"+ m_filelist.at(dlindex).section('/',-1).section('?',0,0);
            XHR::setFilename(imagedir()+"contacts/"+cleanfilename);
            XHR::setUrl(m_filelist.at(dlindex));}
        else {
            XHR::setUrl(m_filelist.at(dlindex));}
        XHR::download();
    } else {dlindex=0;m_downloadtype="";m_contactlist.clear();m_filelist.clear();}
}


void XHR::post()
{
    //qDebug() << "start post to " << m_url;
    QHttpMultiPart *multiPart = new QHttpMultiPart(QHttpMultiPart::FormDataType);

    QHashIterator<QString, QString> iparams(params);
    while(iparams.hasNext()) {
        iparams.next();
        //qDebug() << "\t add param " << iparams.key() << " : " << iparams.value();
        QHttpPart textPart;
        textPart.setHeader(QNetworkRequest::ContentDispositionHeader, QVariant("form-data; name=\"" + iparams.key() + "\""));


        textPart.setBody(iparams.value().toUtf8());
        multiPart->append(textPart);
    }

    UploadableImage uimg;
    QHashIterator<QString, QString> ifiles(files);
    while(ifiles.hasNext()) {
        ifiles.next();

        uimg.setSource(ifiles.value());
        //qDebug() << "\t image: " << uimg.mimetype() << ", " << ifiles.key();

        QHttpPart imagePart;
        imagePart.setHeader(QNetworkRequest::ContentTypeHeader, QVariant(uimg.mimetype()));
        imagePart.setHeader(QNetworkRequest::ContentDispositionHeader, QVariant("form-data; name=\"" + ifiles.key() + "\"; filename=\""+uimg.filename()+"\""));
        imagePart.setBody(uimg.bytes());
        multiPart->append(imagePart);
    }

    QByteArray loginData = m_login.toLocal8Bit().toBase64();
    QString headerData = "Basic " + loginData;
    request.setRawHeader(QByteArray("Authorization"), headerData.toLocal8Bit());

    request.setUrl(m_url+m_api);
    reply = manager.post(request, multiPart);
    qDebug() << "\t request sent";
    connect(reply, &QNetworkReply::finished, this, &XHR::onReplySuccess);
    connect(reply, SIGNAL(error(QNetworkReply::NetworkError)), this, SLOT(onReplyError(QNetworkReply::NetworkError)));
    connect(reply, &QNetworkReply::readyRead, this, &XHR::onReadyRead);
    connect(reply, &QNetworkReply::sslErrors, this, &XHR::onSSLError);
    qDebug() << "\t reply signals connected";
}

void XHR::onReplyError(QNetworkReply::NetworkError code)
{
    qDebug() << code;
    emit this->error( bufferToString(), m_url,m_api, (int) code);
    buffer.clear();
    reply->deleteLater();
}

void XHR::onReplySuccess()
{
    qDebug() << "!";
    emit this->success(buffer, m_api);
    buffer.clear();
//    reply->deleteLater();
}

void XHR::onRequestFinished()
{
    qDebug()<<"download requestFinished ";
    // Save the file here
    if (buffer.isNull()){qDebug() << "File empty"<<m_url; buffer.clear(); emit this->error(m_downloadtype,m_url,m_api,1);}
    else if (m_downloadtype=="picturelist") {
        QJsonDocument jsonResponse = QJsonDocument::fromJson(buffer);
        QJsonObject jsonObject = jsonResponse.object();
        int arraystart=buffer.indexOf('{"data":"')+8;
        int arraylength=buffer.indexOf('"',9)-arraystart;
        QByteArray b64=buffer.mid(arraystart,arraylength);
        QString helpfilename=jsonObject["filename"].toString();
        QString helpfile=helpfilename.left(helpfilename.lastIndexOf("."));
        QString filesuffix="";
        if (jsonObject["type"].toString()=="image/jpeg"){filesuffix=".jpg";}
        else if (jsonObject["type"].toString()=="image/png"){filesuffix=".png";}
        else {filesuffix="";}
        if (helpfilename==""){// check if file has any filename
            helpfile=jsonObject["id"].toString();
            setFilename(imagedir()+"albums/"+jsonObject["album"].toString()+"/"+jsonObject["id"].toString()+filesuffix);
        }
        else{setFilename(imagedir()+"albums/"+jsonObject["album"].toString()+"/"+helpfile+filesuffix);}
        //qDebug()<<"Filename "<<m_filename;
        QFile file(m_filename);
        file.open(QIODevice::WriteOnly);
        file.write(QByteArray::fromBase64(b64));
        buffer.clear();
        b64.clear();
        file.close();
        jsonObject["data"]="";
        jsonObject["filename"]=helpfile+filesuffix;
        emit this->downloadedjson(m_downloadtype,m_url,m_filename,dlindex,jsonObject);
        if(downloadtype()=="picturelist"){dlindex=dlindex+1;XHR::getlist();}
    }
    else  {
        QFile file(m_filename);
        file.open(QIODevice::WriteOnly);
        file.write(buffer);
        buffer.clear();
        file.close();
        emit this->downloaded(m_downloadtype,m_url,m_filename,dlindex);
        if(downloadtype()=="contactlist"){dlindex=dlindex+1;XHR::getlist();}

    //reply->deleteLater();
    }
}

void XHR::onReadyRead()
{
    qDebug() << ".";
    buffer += reply->readAll();
}

//void XHR::updateDownloadProgress(qint64 bytesRead, qint64 totalBytes)
//{
//    qDebug() << "Bytes: " << bytesRead<<" / "<<totalBytes;
    
//}

void XHR::onSSLError(const QList<QSslError> &errors)
{
    qDebug() << "XHR::onSSLError :" ;
    QListIterator<QSslError> ierrs(errors);
    while(ierrs.hasNext()) {
        qDebug() << "\t" <<  ierrs.next().errorString();
    }
}

QString XHR::bufferToString()
{
    return QTextCodec::codecForName("utf-8")->toUnicode(buffer);
}