public class WebmDetailsFetcher {

    private CompositeDisposable disposable = new CompositeDisposable();
    private WebmData webmData;

    public WebmDetailsFetcher(WebmData webmData) {
        this.webmData = webmData;
    }

    public void fetchWebmDetails() {
        ApolloCall<WebmQuery.Data> webmQuery = WebmApolloClient.getWebmApolloClient()
                .query(new WebmQuery(""));
        disposable.add(Rx2Apollo.from(webmQuery)
        .observeOn(AndroidSchedulers.mainThread())
        .subscribeOn(Schedulers.io())
        .subscribeWith(new DisposableObserver<Response<WebmQuery.Data>>() {
            @Override
            public void onNext(Response<WebmQuery.Data> dataResponse) {
                webmData.setWebmData(dataResponse.data());
            }

            @Override
            public void onError(Throwable e) {}

            @Override
            public void onComplete() {}
        }));
    }
}


public interface WebmData {

    void setWebmData(WebmQuery.Data data);
}


public class RandomFragment extends Fragment implements ToggleVotes, WebmData {
    @BindView(R.id.player_view)
    SimpleExoPlayerView playerView;
    @BindView(R.id.txt_createdAt)
    TextView createdAt;
    @BindView(R.id.txt_views)
    TextView views;
    @BindView(R.id.button_random)
    Button randomButton;
    @BindView(R.id.tags_recycler_view)
    RecyclerView mTagsRecycler;
    @BindView(R.id.loading_bar)
    ProgressBar progressBar;

    // Likes N dislikes
    @BindView(R.id.like_count)
    TextView tvLikeCount;
    @BindView(R.id.dislike_count)
    TextView tvDislikeCount;
    @BindView(R.id.thumb_up_button)
    ToggleButton thumbUpButton;
    @BindView(R.id.thumb_down_button)
    ToggleButton thumbDownButton;

    @Inject
    DefaultBandwidthMeter bandwidthMeter;
    @Inject
    TrackSelection.Factory videoTrackSelectionFactory;
    @Inject
    TrackSelector trackSelector;
    @Inject
    SimpleExoPlayer player;
    @Inject
    DataSource.Factory dataSourceFactory;

    private String webmId;
    private int likeCount;
    private int dislikeCount;
    private boolean hasLike = false;
    private boolean hasDislike = false;
    private ToggleVotesUtil toggleVotesUtil;
    private WebmDetailsFetcher webmFetcher;

    private TagsAdapter mTagsAdapter;

    public static RandomFragment newInstance() {
        return new RandomFragment();
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View v = inflater.inflate(R.layout.random_fragment, container, false);
        ButterKnife.bind(this, v);

        LinearLayoutManager mLayoutManager = new LinearLayoutManager(
                getContext(), LinearLayoutManager.HORIZONTAL, false);

        mTagsRecycler.setLayoutManager(mLayoutManager);
        toggleVotesUtil = new ToggleVotesUtil(this);
        webmFetcher = new WebmDetailsFetcher(this);

        randomButton.setOnClickListener(view -> webmFetcher.fetchWebmDetails());
        initPlayerComponent();
        webmFetcher.fetchWebmDetails();

        return v;
    }

    @Override
    public void setWebmData(WebmQuery.Data data) {
        final WebmQuery.GetWebm getWebm = data.getWebm();

        if (getWebm != null) {
            likeCount = getWebm.likes();
            dislikeCount = getWebm.dislikes();
            webmId = getWebm.id();

            setWebmId(webmId);
            initPlayer(getWebm.url());

            createdAt.setText(getWebm.createdAt());
            views.setText(String.valueOf(getWebm.views()));
            tvLikeCount.setText(String.valueOf(likeCount));
            tvDislikeCount.setText(String.valueOf(dislikeCount));

            List<String> tagsList = new ArrayList<>();
            for (int i = 0; i < data.getWebm().tags().size(); ++i) {
                tagsList.add(data.getWebm().tags().get(i).name());
            }
            mTagsAdapter = new TagsAdapter(getContext(), tagsList);
            mTagsRecycler.setAdapter(mTagsAdapter);
            mTagsAdapter.SetOnItemClickListener((view, position) -> {
                String tagName = mTagsAdapter.getItem(position).toLowerCase();
                FragmentTransaction ft = getFragmentManager().beginTransaction();
                Fragment fragment = WebmListFragment.newInstance("createdAt", tagName);
                ft.replace(R.id.container, fragment).commit();
            });
        }
    }

    private void setWebmId(String webmId) {
        this.webmId = webmId;
    }

    private String getWebmId() {
        return webmId;
    }