#include "ThumbnailCache.h"
#include <QCryptographicHash>
#include <QPixmap>

ThumbnailCache::ThumbnailCache(QObject* parent)
  : QObject(parent)
  , manager(new QNetworkAccessManager(this))
{
  cacheFolder =
    QDir(QStandardPaths::writableLocation(QStandardPaths::CacheLocation) +
         "/thumbs");
  if (!cacheFolder.exists()) {
    cacheFolder.mkpath(".");
  }
}

void
ThumbnailCache::addURL(const QString& mediaURL)
{

  QString hashedURL =
    QString(QCryptographicHash::hash(mediaURL.toUtf8(), QCryptographicHash::Md5)
              .toHex());
  qDebug() << hashedURL;
  QString cacheFilename = hashedURL + ".png";
  QString cachedFilePath = cacheFolder.absoluteFilePath(cacheFilename);
  if (cacheFolder.exists(cacheFilename)) {
    qDebug() << mediaURL << " is in cache at " << cachedFilePath;
    emit thumbnailReady(mediaURL, "file://" + cachedFilePath);
    return;
  }
  QProcess* thumbnailerProcess = new QProcess(this);
  QStringList params;
  params << "--get-thumbnail" << mediaURL;
  
  connect(thumbnailerProcess, QOverload<int, QProcess::ExitStatus>::of(&QProcess::finished),
    [=](int exitCode, QProcess::ExitStatus exitStatus){ /* ... */ });
  
   connect(thumbnailerProcess, static_cast<void(QProcess::*)(int, QProcess::ExitStatus)>(&QProcess::finished),

[=]  (int exitCode, QProcess::ExitStatus exitStatus) 
{
       qDebug() << "finished. Exit code: " + exitCode ;
    });

   
   /*
  connect(thumbnailerProcess,
          static_cast<void (QProcess::*)(int, QProcess::ExitStatus)>(
            &QProcess::finished),
          [=](int, QProcess::ExitStatus) {
            qDebug() << "NYA!";
            QString url(thumbnailerProcess->readAll());

            QNetworkRequest request(url);

            QNetworkReply* reply = manager->get(request);

            connect(reply, &QNetworkReply::finished, [=] {
              QByteArray response_data = reply->readAll();

              QPixmap p;
              p.loadFromData(response_data);
              p.save(cachedFilePath, "PNG");
              QString extension =
                url.right(url.length() - url.lastIndexOf(".") - 1).toUpper();
              qDebug() << extension;

              emit thumbnailReady(mediaURL, "file://" + cachedFilePath);
            });
          });*/
  thumbnailerProcess->start("youtube-dl", params);
  while (thumbnailerProcess->exitStatus() == QProcess::NormalExit) {
    qDebug() << "NYA!";
      
}
}