sts-saguenay-android/app/src/main/java/com/rthoni/stssaguenay/ui/fragments/StopListPickerFragment.java

package com.rthoni.stssaguenay.ui.fragments;

import android.app.ProgressDialog;
import android.os.Bundle;
import android.os.Handler;
import android.os.Looper;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.EditText;
import android.widget.Filter;
import android.widget.Filterable;
import android.widget.TextView;
import android.widget.Toast;

import com.luticate.utils.business.LuConsumer;
import com.luticate.utils.business.LuPromise;
import com.luticate.utils.dbo.LuPromiseError;
import com.rthoni.stssaguenay.R;
import com.rthoni.stssaguenay.business.STSBusiness;
import com.rthoni.stssaguenay.business.StopsBusiness;
import com.rthoni.stssaguenay.business.Utils;
import com.rthoni.stssaguenay.dbo.StopsDbo;

import java.util.List;
import java.util.TimerTask;
import java.util.Vector;

import butterknife.BindView;
import butterknife.ButterKnife;

/**
 * Created by robin on 9/29/16.
 */
public class StopListPickerFragment extends Fragment {

    @BindView(R.id.listStops)
    RecyclerView _listStops;

    @BindView(R.id.textSearch)
    EditText _searchText;

    private StopsAdapter _stopsAdapter;

    private LuConsumer<StopsDbo> _onStopSelectedConsumer;

    public static class ViewHolder extends RecyclerView.ViewHolder {
        public TextView _textView;
        public ViewHolder(TextView v) {
            super(v);
            _textView = v;
        }
    }

    public class StopsAdapter extends RecyclerView.Adapter<ViewHolder> implements Filterable {

        private List<StopsDbo> _allStops;

        private List<StopsDbo> _filteredStops;

        @Override
        public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
            View v = LayoutInflater.from(parent.getContext())
                    .inflate(R.layout.simple_recycler_view_item, parent, false);
            ViewHolder vh = new ViewHolder((TextView)v);
            return vh;
        }

        @Override
        public void onBindViewHolder(ViewHolder holder, int position) {
            final StopsDbo stopDbo = _filteredStops.get(position);
            holder._textView.setText(stopDbo.getFullName());
            holder._textView.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    onStopSelected(stopDbo);
                }
            });
        }

        @Override
        public int getItemCount() {
            return _filteredStops == null ? 0 : _filteredStops.size();
        }

        public void setStops(List<StopsDbo> stops, String query) {
            _allStops = stops;
            getFilter().filter(query);
        }

        @Override
        public Filter getFilter() {
            return new Filter() {

                @Override
                protected FilterResults performFiltering(CharSequence constraint) {

                    List<StopsDbo> filteredStops = new Vector<>();
                    final FilterResults results = new FilterResults();

                    if (constraint.length() == 0) {
                        filteredStops.addAll(_allStops);
                    }
                    else {
                        for (StopsDbo stop : _allStops) {
                            if (Utils.stringMatch(stop.getFullName(), constraint.toString())) {
                                filteredStops.add(stop);
                            }
                        }
                    }
                    results.values = filteredStops;
                    results.count = filteredStops.size();
                    return results;
                }

                @Override
                protected void publishResults(CharSequence constraint, FilterResults results) {
                    _stopsAdapter._filteredStops = (List<StopsDbo>) results.values;
                    _stopsAdapter.notifyDataSetChanged();
                }
            };
        }
    }

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

        _stopsAdapter = new StopsAdapter();
        _listStops.setAdapter(_stopsAdapter);
        _listStops.setLayoutManager(new LinearLayoutManager(getContext()));
        _listStops.setHasFixedSize(true);

        _searchText.addTextChangedListener(new TextWatcher() {
            Handler handler = new Handler(Looper.getMainLooper() /*UI thread*/);
            Runnable workRunnable;
            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {

            }

            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {

            }

            @Override
            public void afterTextChanged(final Editable s) {
                handler.removeCallbacks(workRunnable);
                workRunnable = new TimerTask() {
                    @Override
                    public void run() {
                        _stopsAdapter.getFilter().filter(s.toString());
                    }
                };
                handler.postDelayed(workRunnable, 250);
            }
        });

        loadStops();

        return v;
    }

    public void loadStops()
    {
        final ProgressDialog progressDialog = new ProgressDialog(getContext());
        progressDialog.setIndeterminate(true);
        progressDialog.setCancelable(false);
        progressDialog.show();
        progressDialog.setTitle(R.string.loading);
        progressDialog.setMessage(getString(R.string.loading_stops));

        StopsBusiness.getAll(STSBusiness.getConfig(getContext()))
                .then(new LuConsumer<List<StopsDbo>>() {
                    @Override
                    public void execute(List<StopsDbo> data) {
                        progressDialog.dismiss();
                        _stopsAdapter.setStops(data, _searchText.getText().toString());
                    }
                }, new LuConsumer<LuPromiseError>() {
                    @Override
                    public void execute(LuPromiseError data) {
                        progressDialog.dismiss();
                        _stopsAdapter.setStops(new Vector<StopsDbo>(), _searchText.getText().toString());
                        Toast.makeText(getContext(), data.getError(), Toast.LENGTH_LONG).show();
                    }
                });
    }

    public void onStopSelected(StopsDbo stopsDbo)
    {
        if (_onStopSelectedConsumer != null) {
            _onStopSelectedConsumer.execute(stopsDbo);
        }
    }

    public void setOnStopSelectedConsumer(LuConsumer<StopsDbo> onStopSelectedConsumer) {
        _onStopSelectedConsumer = onStopSelectedConsumer;
    }
}