package de.danoeh.antennapod.fragment;

import android.os.Bundle;
import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;
import androidx.recyclerview.widget.ItemTouchHelper;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.View;
import android.view.ViewGroup;

import java.util.List;

import de.danoeh.antennapod.R;
import de.danoeh.antennapod.adapter.AllEpisodesRecycleAdapter;
import de.danoeh.antennapod.core.feed.FeedItem;
import de.danoeh.antennapod.core.storage.DBReader;
import de.danoeh.antennapod.menuhandler.FeedItemMenuHandler;

/**
 * Like 'EpisodesFragment' except that it only shows new episodes and
 * supports swiping to mark as read.
 */
public class NewEpisodesFragment extends EpisodesListFragment {

    public static final String TAG = "NewEpisodesFragment";
    private static final String PREF_NAME = "PrefNewEpisodesFragment";

    @Override
    protected boolean showOnlyNewEpisodes() {
        return true;
    }

    @Override
    protected String getPrefName() {
        return PREF_NAME;
    }

    @Override
    protected boolean shouldUpdatedItemRemainInList(FeedItem item) {
        return item.isNew();
    }

    @Override
    public void onPrepareOptionsMenu(Menu menu) {
        super.onPrepareOptionsMenu(menu);
        menu.findItem(R.id.remove_all_new_flags_item).setVisible(!episodes.isEmpty());
    }

    @NonNull
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View root = super.onCreateView(inflater, container, savedInstanceState);
        emptyView.setTitle(R.string.no_new_episodes_head_label);
        emptyView.setMessage(R.string.no_new_episodes_label);

        ItemTouchHelper.SimpleCallback simpleItemTouchCallback = new ItemTouchHelper.SimpleCallback(0, ItemTouchHelper.LEFT | ItemTouchHelper.RIGHT) {
            @Override
            public boolean onMove(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder, RecyclerView.ViewHolder target) {
                return false;
            }

            @Override
            public void onSwiped(RecyclerView.ViewHolder viewHolder, int swipeDir) {
                AllEpisodesRecycleAdapter.Holder holder = (AllEpisodesRecycleAdapter.Holder) viewHolder;
                FeedItemMenuHandler.removeNewFlagWithUndo(NewEpisodesFragment.this, holder.getFeedItem());
            }

            @Override
            public void onSelectedChanged(RecyclerView.ViewHolder viewHolder,
                                          int actionState) {
                // We only want the active item
                if (actionState != ItemTouchHelper.ACTION_STATE_IDLE) {
                    if (viewHolder instanceof AllEpisodesRecycleAdapter.ItemTouchHelperViewHolder) {
                        AllEpisodesRecycleAdapter.ItemTouchHelperViewHolder itemViewHolder =
                                (AllEpisodesRecycleAdapter.ItemTouchHelperViewHolder) viewHolder;
                        itemViewHolder.onItemSelected();
                    }
                }

                super.onSelectedChanged(viewHolder, actionState);
            }

            @Override
            public void clearView(RecyclerView recyclerView,
                                  RecyclerView.ViewHolder viewHolder) {
                super.clearView(recyclerView, viewHolder);

                if (viewHolder instanceof AllEpisodesRecycleAdapter.ItemTouchHelperViewHolder) {
                    AllEpisodesRecycleAdapter.ItemTouchHelperViewHolder itemViewHolder =
                            (AllEpisodesRecycleAdapter.ItemTouchHelperViewHolder) viewHolder;
                    itemViewHolder.onItemClear();
                }
            }
        };

        ItemTouchHelper itemTouchHelper = new ItemTouchHelper(simpleItemTouchCallback);
        itemTouchHelper.attachToRecyclerView(recyclerView);

        return root;
    }

    @NonNull
    @Override
    protected List<FeedItem> loadData() {
        return DBReader.getNewItemsList();
    }
}