#include "loadrunable.h"
#include "imageringlist.h"
#include <libraw/libraw.h>
#include "imageinfo.h"
#include <QFileInfo>
#include <libexif/exif-data.h>

LoadRunable::LoadRunable(const QString &file, Image *receiver) :
    m_file(file),
    m_receiver(receiver)
{
}

void loadExifEntry(ImageInfoData &info, ExifContent *content, ExifTag tag)
{
    char val[1024];
    ExifEntry *entry = exif_content_get_entry(content, tag);
    if(entry)
    {
        exif_entry_get_value(entry, val, sizeof(val));
        info.append(StringPair(exif_tag_get_title(tag), QString(val)));
    }
}

void LoadRunable::run()
{
    if(!m_receiver->isCurrent())
    {
        return;
    }
    ImageInfoData info;
    QFileInfo finfo(m_file);
    info.append(StringPair(QObject::tr("Filename"), finfo.fileName()));

    if(m_file.endsWith(".CR2", Qt::CaseInsensitive))
    {
        LibRaw raw;
        raw.open_file(m_file.toLocal8Bit().data());
        raw.imgdata.params.half_size = true;
        raw.imgdata.params.use_camera_wb = true;
        raw.imgdata.params.user_flip = 0;
        raw.unpack();
        raw.dcraw_process();

        libraw_processed_image_t *rawImg = raw.dcraw_make_mem_image();
        QImage img(rawImg->width, rawImg->height, QImage::Format_RGB888);

        QString shutterSpeed = QString::number(raw.imgdata.other.shutter);
        if(raw.imgdata.other.shutter < 1)
        {
            shutterSpeed = QString("1/%1s").arg(1.0f/raw.imgdata.other.shutter);
        }

        uint scanLine = rawImg->width*rawImg->colors;
        for(uint i=0; i<rawImg->height; i++)
        {
            memcpy(img.scanLine(i), rawImg->data+(i*scanLine), scanLine);
        }
        info.append(StringPair(QObject::tr("Width"), QString::number(rawImg->width)));
        info.append(StringPair(QObject::tr("Height"), QString::number(rawImg->height)));
        info.append(StringPair(QObject::tr("ISO"), QString::number(raw.imgdata.other.iso_speed)));       
        info.append(StringPair(QObject::tr("Shutter speed"), shutterSpeed));
#if LIBRAW_MINOR_VERSION>=19
        info.append(StringPair(QObject::tr("Camera temperature"), QString::number(raw.imgdata.other.CameraTemperature)));
#endif
        raw.dcraw_clear_mem(rawImg);
        QMetaObject::invokeMethod(m_receiver, "imageLoaded", Qt::QueuedConnection, Q_ARG(QImage, img), Q_ARG(ImageInfoData, info));
    }
    else
    {
        QImage img(m_file);
        ExifData *exif = exif_data_new_from_file(m_file.toLocal8Bit().constData());
        info.append(StringPair(QObject::tr("Width"), QString::number(img.width())));
        info.append(StringPair(QObject::tr("Height"), QString::number(img.height())));
        if(exif)
        {
            loadExifEntry(info, exif->ifd[EXIF_IFD_EXIF], EXIF_TAG_ISO_SPEED_RATINGS);
            loadExifEntry(info, exif->ifd[EXIF_IFD_EXIF], EXIF_TAG_SHUTTER_SPEED_VALUE);
        }
        QMetaObject::invokeMethod(m_receiver, "imageLoaded", Qt::QueuedConnection, Q_ARG(QImage, img), Q_ARG(ImageInfoData, info));
    }
}