/*
 * Copyright 2010-2018 Eric Kok et al.
 *
 * Transdroid 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.
 *
 * Transdroid 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 Transdroid.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.transdroid.core.gui.remoterss;


import androidx.fragment.app.Fragment;

import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Spinner;
import android.widget.TextView;

import org.androidannotations.annotations.AfterViews;
import org.androidannotations.annotations.Bean;
import org.androidannotations.annotations.EFragment;
import org.androidannotations.annotations.ItemClick;
import org.androidannotations.annotations.ItemSelect;
import org.androidannotations.annotations.OptionsItem;
import org.androidannotations.annotations.ViewById;
import org.transdroid.R;
import org.transdroid.core.gui.log.Log;
import org.transdroid.core.gui.remoterss.data.RemoteRssChannel;
import org.transdroid.core.gui.remoterss.data.RemoteRssItem;
import org.transdroid.core.gui.rss.RssFeedsActivity;
import org.transdroid.core.gui.settings.MainSettingsActivity_;

import java.util.ArrayList;
import java.util.List;

/**
 * Fragment that shows a list of RSS items from the server and allows the user
 * to download remotely, without having to set up RSS feeds on the Android device.
 *
 * @author Twig
 */
@EFragment(R.layout.fragment_remoterss)
public class RemoteRssFragment extends Fragment {
    @Bean
    protected Log log;

    // Local data
    protected ArrayList<RemoteRssItem> remoteRssItems;

    // Views
    @ViewById
    protected View detailsContainer;
    @ViewById(R.id.remoterss_filter)
    protected Spinner remoteRssFilter;
    @ViewById
    protected ListView torrentsList;
    @ViewById(R.id.remoterss_status_message)
    protected TextView remoteRssStatusMessage;


    @AfterViews
    protected void init() {
        // Inject menu options in the actions toolbar
        setHasOptionsMenu(true);

        // Set up details adapter
        RemoteRssItemsAdapter adapter = new RemoteRssItemsAdapter(getActivity());
        torrentsList.setAdapter(adapter);
        torrentsList.setFastScrollEnabled(true);
    }

    @Override
    public void onResume() {
        super.onResume();
        this.refreshScreen();
    }

    @OptionsItem(R.id.action_refresh)
    protected void refreshScreen() {
        RssFeedsActivity rssActivity = (RssFeedsActivity) getActivity();
        rssActivity.refreshRemoteFeeds();
    }

    @OptionsItem(R.id.action_settings)
    protected void openSettings() {
        MainSettingsActivity_.intent(getActivity()).start();
    }

    /**
     * Updates the UI with a new list of RSS items.
     */
    public void updateRemoteItems(List<RemoteRssItem> remoteItems, boolean scrollToTop) {
        RemoteRssItemsAdapter adapter = (RemoteRssItemsAdapter) torrentsList.getAdapter();

        remoteRssItems = new ArrayList<>(remoteItems);
        adapter.updateItems(remoteRssItems);

        if (scrollToTop) {
            torrentsList.smoothScrollToPosition(0);
        }
        // Show/hide a nice message if there are no items to show
        if (remoteRssItems.size() > 0) {
            remoteRssStatusMessage.setVisibility(View.GONE);
        } else {
            remoteRssStatusMessage.setVisibility(View.VISIBLE);
            remoteRssStatusMessage.setText(R.string.remoterss_no_files);
        }
    }

    public void updateChannelFilters(List<RemoteRssChannel> feedLabels) {
        List<String> labels = new ArrayList<>();

        for (RemoteRssChannel feedLabel : feedLabels) {
            labels.add(feedLabel.getName());
        }

        ArrayAdapter<String> adapter = new ArrayAdapter<>(this.getContext(), android.R.layout.simple_spinner_dropdown_item, labels);
        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        remoteRssFilter.setAdapter(adapter);
    }

    /**
     * When the user clicks on an item, prepare to download it.
     */
    @ItemClick(resName = "torrents_list")
    protected void detailsListClicked(int position) {
        RemoteRssItemsAdapter adapter = (RemoteRssItemsAdapter) torrentsList.getAdapter();
        RemoteRssItem item = (RemoteRssItem) adapter.getItem(position);

        ((RssFeedsActivity) getActivity()).downloadRemoteRssItem(item);
    }

    @ItemSelect(R.id.remoterss_filter)
    protected void onFeedSelected(boolean selected, int position) {
        ((RssFeedsActivity) getActivity()).onFeedSelected(position);
    }
}