/**
 * Copyright (C) 2013 Aurélien Chabot <aurelien@chabot.fr>
 *
 * This file is part of DroidUPNP.
 *
 * DroidUPNP 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.
 *
 * DroidUPNP 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 DroidUPNP.  If not, see <http://www.gnu.org/licenses/>.
 */

package org.droidupnp;

import android.app.Fragment;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.content.SharedPreferences;
import android.content.res.Configuration;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.support.v7.app.ActionBar;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.view.LayoutInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;

import com.reactlibrary.R;

/**
 * Fragment used for managing interactions for and presentation of a navigation drawer.
 * See the <a href="https://developer.android.com/design/patterns/navigation-drawer.html#Interaction">
 * design guidelines</a> for a complete explanation of the behaviors implemented here.
 */
public class DrawerFragment extends Fragment {

	/**
	 * Per the design guidelines, you should show the drawer on launch until the user manually
	 * expands it. This shared preference tracks this.
	 */
	private static final String PREF_USER_LEARNED_DRAWER = "navigation_drawer_learned";

	/**
	 * Helper component that ties the action bar to the navigation drawer.
	 */
	private ActionBarDrawerToggle mDrawerToggle;

	private DrawerLayout mDrawerLayout;
	private View mDrawerView;
	private View mFragmentContainerView;

	private boolean mUserLearnedDrawer;

	public DrawerFragment() {
	}

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);

		// Read in the flag indicating whether or not the user has demonstrated awareness of the
		// drawer. See PREF_USER_LEARNED_DRAWER for details.
		SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(getActivity());
		mUserLearnedDrawer = sp.getBoolean(PREF_USER_LEARNED_DRAWER, false);
	}

	@Override
	public void onActivityCreated (Bundle savedInstanceState) {
		super.onActivityCreated(savedInstanceState);
		// Indicate that this fragment would like to influence the set of actions in the action bar.
		setHasOptionsMenu(true);
	}

	@Override
	public View onCreateView(LayoutInflater inflater, ViewGroup container,
			Bundle savedInstanceState) {
		mDrawerView =  inflater.inflate(
				R.layout.device_fragment, container, false);
		return mDrawerView;
	}

	/**
	 * Users of this fragment must call this method to set up the navigation drawer interactions.
	 *
	 * @param fragmentId   The android:id of this fragment in its activity's layout.
	 * @param drawerLayout The DrawerLayout containing this fragment's UI.
	 */
	public void setUp(int fragmentId, DrawerLayout drawerLayout) {
		mFragmentContainerView = getActivity().findViewById(fragmentId);
		mDrawerLayout = drawerLayout;

		// set a custom shadow that overlays the main content when the drawer opens
		mDrawerLayout.setDrawerShadow(R.drawable.drawer_shadow, GravityCompat.START);
		// set up the drawer's list view with items and click listener

		ActionBar actionBar = getActionBar();
		actionBar.setDisplayHomeAsUpEnabled(true);
		actionBar.setHomeButtonEnabled(true);

		// ActionBarDrawerToggle ties together the the proper interactions
		// between the navigation drawer and the action bar app icon.
		mDrawerToggle = new ActionBarDrawerToggle(
				getActivity(),					/* host Activity */
				mDrawerLayout,					/* DrawerLayout object */
				R.string.navigation_drawer_open,  /* "open drawer" description for accessibility */
				R.string.navigation_drawer_close  /* "close drawer" description for accessibility */
		) {
			@Override
			public void onDrawerClosed(View drawerView) {
				super.onDrawerClosed(drawerView);
				if (!isAdded()) {
					return;
				}

				getActivity().invalidateOptionsMenu(); // calls onPrepareOptionsMenu()
			}

			@Override
			public void onDrawerOpened(View drawerView) {
				super.onDrawerOpened(drawerView);
				if (!isAdded()) {
					return;
				}

				if (!mUserLearnedDrawer) {
					// The user manually opened the drawer; store this flag to prevent auto-showing
					// the navigation drawer automatically in the future.
					mUserLearnedDrawer = true;
					SharedPreferences sp = PreferenceManager
							.getDefaultSharedPreferences(getActivity());
					sp.edit().putBoolean(PREF_USER_LEARNED_DRAWER, true).apply();
				}

				getActivity().invalidateOptionsMenu(); // calls onPrepareOptionsMenu()
			}
		};

		// If the user hasn't 'learned' about the drawer, open it to introduce them to the drawer,
		// per the navigation drawer design guidelines.
		if (!mUserLearnedDrawer) {
			mDrawerLayout.openDrawer(mFragmentContainerView);
		}

		// Defer code dependent on restoration of previous instance state.
		mDrawerLayout.post(new Runnable() {
			@Override
			public void run() {
				mDrawerToggle.syncState();
			}
		});

		mDrawerLayout.addDrawerListener(mDrawerToggle);
	}

	@Override
	public void onConfigurationChanged(Configuration newConfig) {
		super.onConfigurationChanged(newConfig);
		// Forward the new configuration the drawer toggle component.
		mDrawerToggle.onConfigurationChanged(newConfig);
	}

	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		if (mDrawerToggle.onOptionsItemSelected(item)) {
			return true;
		}
		return super.onOptionsItemSelected(item);
	}

	private ActionBar getActionBar() {
		return ((AppCompatActivity)getActivity()).getSupportActionBar();
	}
}