/*
 * 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 <utility>

#include <QtGlobal>
#include <QList>
#include <QUndoStack>

#include "playlist.h"
#include "playlistitem.h"
#include "playlistundocommands.h"

namespace PlaylistUndoCommands {

Base::Base(Playlist *playlist) : QUndoCommand(nullptr), playlist_(playlist) {}

InsertItems::InsertItems(Playlist *playlist, const PlaylistItemPtrList &items, int pos, bool enqueue, bool enqueue_next)
    : Base(playlist),
      items_(items),
      pos_(pos),
      enqueue_(enqueue),
      enqueue_next_(enqueue_next) {

  setText(tr("add %n songs", "", static_cast<int>(items_.count())));

}

void InsertItems::redo() {
  playlist_->InsertItemsWithoutUndo(items_, pos_, enqueue_, enqueue_next_);
}

void InsertItems::undo() {
  const int start = pos_ == -1 ? static_cast<int>(playlist_->rowCount() - items_.count()) : pos_;
  playlist_->RemoveItemsWithoutUndo(start, static_cast<int>(items_.count()));
}

bool InsertItems::UpdateItem(const PlaylistItemPtr &updated_item) {
  for (int i = 0; i < items_.size(); i++) {
    PlaylistItemPtr item = items_[i];
    if (item->Metadata().url() == updated_item->Metadata().url()) {
      items_[i] = updated_item;
      return true;
    }
  }
  return false;
}


RemoveItems::RemoveItems(Playlist *playlist, int pos, int count) : Base(playlist) {
  setText(tr("remove %n songs", "", count));

  ranges_ << Range(pos, count);
}

void RemoveItems::redo() {

  for (int i = 0; i < ranges_.count(); ++i) {
    ranges_[i].items_ = playlist_->RemoveItemsWithoutUndo(ranges_[i].pos_, ranges_[i].count_);
  }

}

void RemoveItems::undo() {

  for (int i = static_cast<int>(ranges_.count() - 1); i >= 0; --i) {
    playlist_->InsertItemsWithoutUndo(ranges_[i].items_, ranges_[i].pos_);
  }

}

bool RemoveItems::mergeWith(const QUndoCommand *other) {

  const RemoveItems *remove_command = static_cast<const RemoveItems*>(other);
  ranges_.append(remove_command->ranges_);

  int sum = 0;
  for (const Range &range : std::as_const(ranges_)) sum += range.count_;
  setText(tr("remove %n songs", "", sum));

  return true;

}


MoveItems::MoveItems(Playlist *playlist, const QList<int> &source_rows, int pos)
    : Base(playlist),
      source_rows_(source_rows),
      pos_(pos) {

  setText(tr("move %n songs", "", static_cast<int>(source_rows.count())));

}

void MoveItems::redo() {
  playlist_->MoveItemsWithoutUndo(source_rows_, pos_);
}

void MoveItems::undo() {
  playlist_->MoveItemsWithoutUndo(pos_, source_rows_);
}

ReOrderItems::ReOrderItems(Playlist *playlist, const PlaylistItemPtrList &new_items)
    : Base(playlist), old_items_(playlist->items_), new_items_(new_items) {}

void ReOrderItems::undo() { playlist_->ReOrderWithoutUndo(old_items_); }

void ReOrderItems::redo() { playlist_->ReOrderWithoutUndo(new_items_); }

SortItems::SortItems(Playlist *playlist, int column, Qt::SortOrder order, const PlaylistItemPtrList &new_items)
    : ReOrderItems(playlist, new_items) {

  Q_UNUSED(column);
  Q_UNUSED(order);

  setText(tr("sort songs"));

}


ShuffleItems::ShuffleItems(Playlist *playlist, const PlaylistItemPtrList &new_items)
    : ReOrderItems(playlist, new_items) {

  setText(tr("shuffle songs"));

}

}  // namespace PlaylistUndoCommands
