/*
 * Strawberry Music Player
 * This file was part of Clementine.
 * Copyright 2010, David Sansome <me@davidsansome.com>
 * Copyright 2018-2020, Jonas Kvinge <jonas@jkvinge.net>
 *
 * 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 <QObject>
#include <QCoreApplication>
#include <QString>
#include <QStringList>
#include <QImage>
#include <QSettings>

#include "osdbase.h"
#include "osdpretty.h"

#include "core/application.h"
#include "core/logging.h"
#include "core/systemtrayicon.h"
#include "core/utilities.h"
#include "covermanager/currentalbumcoverloader.h"

const char *OSDBase::kSettingsGroup = "OSD";

OSDBase::OSDBase(SystemTrayIcon *tray_icon, Application *app, QObject *parent)
    : QObject(parent),
      app_(app),
      tray_icon_(tray_icon),
      pretty_popup_(new OSDPretty(OSDPretty::Mode_Popup)),
      app_name_(QCoreApplication::applicationName()),
      timeout_msec_(5000),
      behaviour_(Native),
      show_on_volume_change_(false),
      show_art_(true),
      show_on_play_mode_change_(true),
      show_on_pause_(true),
      show_on_resume_(false),
      use_custom_text_(false),
      custom_text1_(QString()),
      custom_text2_(QString()),
      preview_mode_(false),
      force_show_next_(false),
      ignore_next_stopped_(false)
  {

  connect(app_->current_albumcover_loader(), SIGNAL(ThumbnailLoaded(Song, QUrl, QImage)), SLOT(AlbumCoverLoaded(Song, QUrl, QImage)));

  app_name_[0] = app_name_[0].toUpper();

}

OSDBase::~OSDBase() {
  delete pretty_popup_;
}

void OSDBase::ReloadSettings() {

  QSettings s;
  s.beginGroup(kSettingsGroup);
  behaviour_ = OSDBase::Behaviour(s.value("Behaviour", Native).toInt());
  timeout_msec_ = s.value("Timeout", 5000).toInt();
  show_on_volume_change_ = s.value("ShowOnVolumeChange", false).toBool();
  show_art_ = s.value("ShowArt", true).toBool();
  show_on_play_mode_change_ = s.value("ShowOnPlayModeChange", true).toBool();
  show_on_pause_ = s.value("ShowOnPausePlayback", true).toBool();
  show_on_resume_ = s.value("ShowOnResumePlayback", false).toBool();
  use_custom_text_ = s.value(("CustomTextEnabled"), false).toBool();
  custom_text1_ = s.value("CustomText1").toString();
  custom_text2_ = s.value("CustomText2").toString();
  s.endGroup();

  if (!SupportsNativeNotifications() && behaviour_ == Native)
    behaviour_ = Pretty;

  if (!SupportsTrayPopups() && behaviour_ == TrayPopup)
    behaviour_ = Disabled;

  ReloadPrettyOSDSettings();

}

// Reload just Pretty OSD settings, not everything
void OSDBase::ReloadPrettyOSDSettings() {

  pretty_popup_->set_popup_duration(timeout_msec_);
  pretty_popup_->ReloadSettings();

}

void OSDBase::ReshowCurrentSong() {

  force_show_next_ = true;
  AlbumCoverLoaded(last_song_, last_image_uri_, last_image_);

}

void OSDBase::AlbumCoverLoaded(const Song &song, const QUrl &cover_url, const QImage &image) {

  // Don't change tray icon details if it's a preview
  if (!preview_mode_ && tray_icon_)
    tray_icon_->SetNowPlaying(song, cover_url);

  last_song_ = song;
  last_image_ = image;
  last_image_uri_ = cover_url;

  QStringList message_parts;
  QString summary;
  if (!use_custom_text_) {
    summary = song.PrettyTitle();
    if (!song.artist().isEmpty())
      summary = QString("%1 - %2").arg(song.artist(), summary);
    if (!song.album().isEmpty())
      message_parts << song.album();
    if (song.disc() > 0)
      message_parts << tr("disc %1").arg(song.disc());
    if (song.track() > 0)
      message_parts << tr("track %1").arg(song.track());
  }
  else {
    summary = ReplaceMessage(custom_text1_, song);
    message_parts << ReplaceMessage(custom_text2_, song);
  }

  if (show_art_) {
    ShowMessage(summary, message_parts.join(", "), "notification-audio-play", image);
  }
  else {
    ShowMessage(summary, message_parts.join(", "), "notification-audio-play", QImage());
  }

  // Reload the saved settings if they were changed for preview
  if (preview_mode_) {
    ReloadSettings();
    preview_mode_ = false;
  }

}

void OSDBase::Paused() {

  if (show_on_pause_) {
    ShowMessage(app_name_, tr("Paused"));
  }

}

void OSDBase::Resumed() {

  if (show_on_resume_) {
    AlbumCoverLoaded(last_song_, last_image_uri_, last_image_);
  }

}

void OSDBase::Stopped() {

  if (tray_icon_) tray_icon_->ClearNowPlaying();
  if (ignore_next_stopped_) {
    ignore_next_stopped_ = false;
    return;
  }

  ShowMessage(app_name_, tr("Stopped"));

}

void OSDBase::StopAfterToggle(bool stop) {
  ShowMessage(app_name_, tr("Stop playing after track: %1").arg(stop ? tr("On") : tr("Off")));
}

void OSDBase::PlaylistFinished() {

  // We get a PlaylistFinished followed by a Stopped from the player
  ignore_next_stopped_ = true;

  ShowMessage(app_name_, tr("Playlist finished"));

}

void OSDBase::VolumeChanged(int value) {

  if (!show_on_volume_change_) return;

  ShowMessage(app_name_, tr("Volume %1%").arg(value));

}

void OSDBase::ShowMessage(const QString &summary, const QString &message, const QString icon, const QImage &image) {

  if (pretty_popup_->toggle_mode()) {
    pretty_popup_->ShowMessage(summary, message, image);
  }
  else {
    switch (behaviour_) {
      case Native:
        if (image.isNull()) {
          ShowMessageNative(summary, message, icon, QImage());
        }
        else {
          ShowMessageNative(summary, message, QString(), image);
        }
        break;

#ifndef Q_OS_MACOS
      case TrayPopup:
        if (tray_icon_) tray_icon_->ShowPopup(summary, message, timeout_msec_);
        break;
#endif

      case Disabled:
        if (!force_show_next_) break;
        force_show_next_ = false;
      // fallthrough
      case Pretty:
        pretty_popup_->ShowMessage(summary, message, image);
        break;

      default:
        break;
    }
  }

}

void OSDBase::ShuffleModeChanged(PlaylistSequence::ShuffleMode mode) {

  if (show_on_play_mode_change_) {
    QString current_mode = QString();
    switch (mode) {
      case PlaylistSequence::Shuffle_Off:         current_mode = tr("Don't shuffle");   break;
      case PlaylistSequence::Shuffle_All:         current_mode = tr("Shuffle all");     break;
      case PlaylistSequence::Shuffle_InsideAlbum: current_mode = tr("Shuffle tracks in this album"); break;
      case PlaylistSequence::Shuffle_Albums:      current_mode = tr("Shuffle albums");  break;
    }
    ShowMessage(app_name_, current_mode);
  }

}

void OSDBase::RepeatModeChanged(PlaylistSequence::RepeatMode mode) {

  if (show_on_play_mode_change_) {
    QString current_mode = QString();
    switch (mode) {
      case PlaylistSequence::Repeat_Off:      current_mode = tr("Don't repeat");   break;
      case PlaylistSequence::Repeat_Track:    current_mode = tr("Repeat track");   break;
      case PlaylistSequence::Repeat_Album:    current_mode = tr("Repeat album"); break;
      case PlaylistSequence::Repeat_Playlist: current_mode = tr("Repeat playlist"); break;
      case PlaylistSequence::Repeat_OneByOne: current_mode = tr("Stop after every track"); break;
      case PlaylistSequence::Repeat_Intro: current_mode = tr("Intro tracks"); break;
    }
    ShowMessage(app_name_, current_mode);
  }

}

QString OSDBase::ReplaceMessage(const QString &message, const Song &song) {

  QString newline = "<br/>";

  if (message.indexOf("%newline%") != -1) {
    // We need different strings depending on notification type
    switch (behaviour_) {
      case Native:
#ifdef Q_OS_MACOS
        newline = "\n";
        break;
#endif
#ifdef Q_OS_LINUX
        break;
#endif
#ifdef Q_OS_WIN32
        // Other OS don't support native notifications
        qLog(Debug) << "New line not supported by this notification type under Windows";
        newline = "";
        break;
#endif
      case TrayPopup:
        qLog(Debug) << "New line not supported by this notification type";
        newline = "";
        break;
      case Pretty:
      default:
        // When notifications are disabled, we force the PrettyOSD
        break;
    }
  }

  return Utilities::ReplaceMessage(message, song, newline);
}

void OSDBase::ShowPreview(const Behaviour type, const QString &line1, const QString &line2, const Song &song) {

  behaviour_ = type;
  custom_text1_ = line1;
  custom_text2_ = line2;
  if (!use_custom_text_) use_custom_text_ = true;

  // We want to reload the settings, but we can't do this here because the cover art loading is asynch
  preview_mode_ = true;
  AlbumCoverLoaded(song, QUrl(), QImage());

}

void OSDBase::SetPrettyOSDToggleMode(bool toggle) {
  pretty_popup_->set_toggle_mode(toggle);
}

bool OSDBase::SupportsNativeNotifications() {
  return false;
}

bool OSDBase::SupportsTrayPopups() {
  return tray_icon_;
}

void OSDBase::ShowMessageNative(const QString&, const QString&, const QString&, const QImage&) {
  qLog(Warning) << "Not implemented";
}