#include "pagecontroller_v2.h"

#include "../static.h"

#include "comic.h"
#include "comiccontroller.h"
#include "yacreader_http_session.h"

#include <QDataStream>
#include <QPointer>

#include <QsLog.h>

#include "db_helper.h"

PageControllerV2::PageControllerV2() {}

void PageControllerV2::service(HttpRequest& request, HttpResponse& response)
{
    QByteArray token = request.getHeader("x-request-id");
    YACReaderHttpSession *ySession = Static::yacreaderSessionStore->getYACReaderSessionHttpSession(token);
    
    if (ySession == nullptr) {
        response.setStatus(424,"no session for this comic");
        response.write("424 no session for this comic",true);
        return;
    }
    
    QString path = QUrl::fromPercentEncoding(request.getPath()).toUtf8();
    bool remote = path.endsWith("remote");
    
    QStringList pathElements = path.split('/');
    QString libraryName = DBHelper::getLibraryName(pathElements.at(2).toInt());
    qulonglong comicId = pathElements.at(5).toULongLong();
    unsigned int page = pathElements.at(7).toUInt();
    
    Comic * comicFile;
    qulonglong currentComicId;
    if(remote)
    {
        QLOG_TRACE() << "se recupera comic remoto para servir páginas";
        comicFile = ySession->getCurrentRemoteComic();
        currentComicId = ySession->getCurrentRemoteComicId();
    }
    else
    {
        QLOG_TRACE() << "se recupera comic para servir páginas";
        comicFile = ySession->getCurrentComic();
        currentComicId = ySession->getCurrentComicId();
    }
    
    if(currentComicId != 0 && !QPointer<Comic>(comicFile).isNull())
    {
        if (comicFile->numPages() == 0) {
            response.setStatus(412,"opening file");
            response.write("412 opening file",true);
        } else {
            if(comicId == currentComicId && page < comicFile->numPages())
            {
                if(comicFile->pageIsLoaded(page))
                {
                    response.setHeader("Content-Type", "image/jpeg");
                    response.setHeader("Transfer-Encoding","chunked");
                    QByteArray pageData = comicFile->getRawPage(page);
                    QDataStream data(pageData);
                    char buffer[100000];
                    while (!data.atEnd()) {
                        int len = data.readRawData(buffer,100000);
                        response.write(QByteArray(buffer,len));
                    }
                    response.write(QByteArray(),true);
                }
                else
                {
                    response.setStatus(412,"loading page");
                    response.write("412 loading page",true);
                }
            }
            else
            {
                if(comicId != currentComicId)
                {
                    //delete comicFile;
                    if(remote)
                        ySession->dismissCurrentRemoteComic();
                    else
                        ySession->dismissCurrentComic();
                }
                response.setStatus(404,"not found");
                response.write("404 not found",true);
            }
        }
    }
    else
    {
        response.setStatus(404,"not found");
        response.write("404 not found",true);
    }
}