package com.whatamidoingwithmylife.splitbill;

import android.app.Activity;
import android.arch.lifecycle.Observer;
import android.arch.lifecycle.ViewModelProviders;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Spinner;

public class PlaceholderFragment extends Fragment {
    /**
     * The fragment argument representing the section number for this
     * fragment.
     */
    private static final String TAG = "SplitBill/Fragment";
    private static final String ARG_SECTION_NUMBER = "section_number";
    private final Fragment f = this;

    MenuTitles mCallback;


    public PlaceholderFragment() {
    }

    public interface MenuTitles {
        public void onStringReceived(String[] strings);
    }

    /**
     * Returns a new instance of this fragment for the given section
     * number.
     */
    public static PlaceholderFragment newInstance(int sectionNumber) {
        PlaceholderFragment fragment = new PlaceholderFragment();
        Bundle args = new Bundle();
        args.putInt(ARG_SECTION_NUMBER, sectionNumber);
        fragment.setArguments(args);
        return fragment;
    }

    @Override
    public void onAttach(Activity activity) {
        super.onAttach(activity);

        // This makes sure that the container activity has implemented
        // the callback interface. If not, it throws an exception
        try {
            mCallback = (MenuTitles) activity;
        } catch (ClassCastException e) {
            throw new ClassCastException(activity.toString()
                    + " must implement OnHeadlineSelectedListener");
        }
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

        final View rootView = inflater.inflate(R.layout.fragment_menu, container, false);
        final MenuActivity menuAct = (MenuActivity) getActivity();
        final MenuViewModel viewModel = ViewModelProviders.of(this, new MenuViewModelFactory(menuAct.getApplication(), MenuActivity.ResID)).get(MenuViewModel.class);

        viewModel.getAllMenuTitles().observe(this, new Observer<String[]>() {
            @Override
            public void onChanged(String[] strings) {
                final Spinner spinner = rootView.findViewById(R.id.spinner);
                final SubMenuViewModel subMenuViewModel = ViewModelProviders.of(f, new SubMenuViewModelFactory(menuAct.getApplication(), spinner.getSelectedItemPosition() + 1)).get(SubMenuViewModel.class);

                ArrayAdapter<String> adapter = new ArrayAdapter<String>(getContext(), R.layout.support_simple_spinner_dropdown_item, strings);
                adapter.setDropDownViewResource(R.layout.support_simple_spinner_dropdown_item);
                spinner.setAdapter(adapter);

                spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
                    @Override
                    public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {
                        doTheWigWam(spinner.getSelectedItemPosition());
                    }

                    @Override
                    public void onNothingSelected(AdapterView<?> adapterView) {

                    }
                });
            }
        });

        return rootView;
    }

    public void doTheWigWam(int MenuID) {
        SubMenuViewModel vm = ViewModelProviders.of(f, new SubMenuViewModelFactory(f.getActivity().getApplication(), MenuID)).get(SubMenuViewModel.class);
        vm.getSubMenus().observe(this, new Observer<String[]>() {
            @Override
            public void onChanged(String[] strings) {
                for (int i = 0; i < strings.length; i++)
                    Log.d(TAG, "Received " + strings[i]);

                mCallback.onStringReceived(strings);
            }
        });
    }

}