/*
 * Strawberry Music Player
 * This file was part of Clementine.
 * Copyright 2010, David Sansome <me@davidsansome.com>
 *
 * Strawberry 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.
 *
 * Strawberry 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 Strawberry.  If not, see <http://www.gnu.org/licenses/>.
 * 
 */

#include "config.h"

#include <QDir>
#include <QTemporaryFile>
#include <QUrl>

#include "currentartloader.h"
#include "core/application.h"
#include "core/iconloader.h"
#include "covermanager/albumcoverloader.h"
#include "playlist/playlistmanager.h"

CurrentArtLoader::CurrentArtLoader(Application *app, QObject *parent)
    : QObject(parent),
      app_(app),
    temp_file_pattern_(QDir::tempPath() + "/strawberry-art-XXXXXX.jpg"),
    id_(0)
{
  options_.scale_output_image_ = false;
  options_.pad_output_image_ = false;
  //QIcon nocover = IconLoader::Load("nocover");
  //options_.default_output_image_ = nocover.pixmap(nocover.availableSizes().last()).toImage();
  options_.default_output_image_ = QImage(":/pictures/noalbumart.png");

  connect(app_->album_cover_loader(), SIGNAL(ImageLoaded(quint64, QImage)), SLOT(TempArtLoaded(quint64, QImage)));

  connect(app_->playlist_manager(), SIGNAL(CurrentSongChanged(Song)), SLOT(LoadArt(Song)));
}

CurrentArtLoader::~CurrentArtLoader() {}

void CurrentArtLoader::LoadArt(const Song &song) {
  last_song_ = song;
  id_ = app_->album_cover_loader()->LoadImageAsync(options_, last_song_);
}

void CurrentArtLoader::TempArtLoaded(quint64 id, const QImage &image) {

  if (id != id_) return;
  id_ = 0;

  QString uri;
  QString thumbnail_uri;
  QImage thumbnail;

  if (!image.isNull()) {
    temp_art_.reset(new QTemporaryFile(temp_file_pattern_));
    temp_art_->setAutoRemove(true);
    temp_art_->open();
    image.save(temp_art_->fileName(), "JPEG");

    // Scale the image down to make a thumbnail.  It's a bit crap doing it here
    // since it's the GUI thread, but the alternative is hard.
    temp_art_thumbnail_.reset(new QTemporaryFile(temp_file_pattern_));
    temp_art_thumbnail_->open();
    temp_art_thumbnail_->setAutoRemove(true);
    thumbnail = image.scaledToHeight(120, Qt::SmoothTransformation);
    thumbnail.save(temp_art_thumbnail_->fileName(), "JPEG");

    uri = "file://" + temp_art_->fileName();
    thumbnail_uri = "file://" + temp_art_thumbnail_->fileName();
  }

  emit ArtLoaded(last_song_, uri, image);
  emit ThumbnailLoaded(last_song_, thumbnail_uri, thumbnail);

}