/*
 * Copyright 2013 Priboi Tiberiu
 * Copyright 2013 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.ptr.folding.sample;

import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.annotation.SuppressLint;
import android.content.res.Configuration;
import android.os.Build;
import android.os.Bundle;
import android.support.v4.app.ActionBarDrawerToggle;
import android.support.v4.view.GravityCompat;
import android.support.v4.view.MenuItemCompat;
import android.support.v7.app.ActionBarActivity;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Spinner;

import com.ptr.folding.FoldingDrawerLayout;

/**
 * This example illustrates a common usage of the FoldingDrawerLayout widget to
 * add Folding Efect to DrawerLayout from Android support library.
 * <p/>
 * <p>
 * When a navigation (left) drawer is present, the host activity should detect
 * presses of the action bar's Up affordance as a signal to open and close the
 * navigation drawer. The ActionBarDrawerToggle facilitates this behavior. Items
 * within the drawer should fall into one of two categories:
 * </p>
 * <p/>
 * <ul>
 * <li><strong>View switches</strong>. A view switch follows the same basic
 * policies as list or tab navigation in that a view switch does not create
 * navigation history. This pattern should only be used at the root activity of
 * a task, leaving some form of Up navigation active for activities further down
 * the navigation hierarchy.</li>
 * <li><strong>Selective Up</strong>. The drawer allows the user to choose an
 * alternate parent for Up navigation. This allows a user to jump across an
 * app's navigation hierarchy at will. The application should treat this as it
 * treats Up navigation from a different task, replacing the current task stack
 * using TaskStackBuilder or similar. This is the only form of navigation drawer
 * that should be used outside of the root activity of a task.</li>
 * </ul>
 * <p/>
 * <p>
 * Right side drawers should be used for actions, not navigation. This follows
 * the pattern established by the Action Bar that navigation should be to the
 * left and actions to the right. An action should be an operation performed on
 * the current contents of the window, for example enabling or disabling a data
 * overlay on top of the current content.
 * </p>
 */
public class FoldingDrawerLayoutActivity extends ActionBarActivity {

	private FoldingDrawerLayout mDrawerLayout;
	private ListView mDrawerList;
	private ActionBarDrawerToggle mDrawerToggle;

	private CharSequence mDrawerTitle;
	private CharSequence mTitle;
	private String[] mAnimalTitles;

	private ItemSelectedListener mItemSelectedListener;

	static final boolean IS_HONEYCOMB = Build.VERSION.SDK_INT == Build.VERSION_CODES.HONEYCOMB;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_drawer);

		mTitle = mDrawerTitle = getTitle();
		mAnimalTitles = getResources().getStringArray(R.array.animal_array);
		mDrawerLayout = (FoldingDrawerLayout) findViewById(R.id.drawer_layout);
		mDrawerList = (ListView) findViewById(R.id.left_drawer);

		// mFoldLayout = (FoldingNavigationLayout)findViewById(R.id.fold_view);
		// mFoldLayout.setBackgroundColor(Color.BLACK);

		// 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
		mDrawerList.setAdapter(new ArrayAdapter<String>(this,
				R.layout.drawer_list_item, mAnimalTitles));
		mDrawerList.setOnItemClickListener(new DrawerItemClickListener());

		mItemSelectedListener = new ItemSelectedListener();

		// enable ActionBar app icon to behave as action to toggle nav drawer
		getSupportActionBar().setDisplayHomeAsUpEnabled(true);
		getSupportActionBar().setHomeButtonEnabled(true);

		// ActionBarDrawerToggle ties together the the proper interactions
		// between the sliding drawer and the action bar app icon
		mDrawerToggle = new ActionBarDrawerToggle(this, /* host Activity */
		mDrawerLayout, /* DrawerLayout object */
		R.drawable.ic_drawer, /* nav drawer image to replace 'Up' caret */
		R.string.drawer_open, /* "open drawer" description for accessibility */
		R.string.drawer_close /* "close drawer" description for accessibility */
		) {

			@SuppressLint("NewApi")
			public void onDrawerClosed(View view) {
				getSupportActionBar().setTitle(mTitle);
				if (IS_HONEYCOMB) {
					invalidateOptionsMenu(); // creates call to
					// onPrepareOptionsMenu()
				}

			}

			public void onDrawerSlide(View drawerView, float slideOffset) {

			}

			@SuppressLint("NewApi")
			public void onDrawerOpened(View drawerView) {
				getSupportActionBar().setTitle(mDrawerTitle);
				if (IS_HONEYCOMB) {
					invalidateOptionsMenu(); // creates call to
					// onPrepareOptionsMenu()
				}
			}
		};
		mDrawerLayout.setDrawerListener(mDrawerToggle);

		if (savedInstanceState == null) {
			selectItem(0);
		}
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		MenuInflater inflater = getMenuInflater();
		inflater.inflate(R.menu.menu_spinner, menu);

		MenuItem spinerItem = menu.findItem(R.id.num_of_folds);
		Spinner s = (Spinner) MenuItemCompat.getActionView(spinerItem);

		s.setOnItemSelectedListener(mItemSelectedListener);

		return super.onCreateOptionsMenu(menu);
	}

	/* Called whenever we call invalidateOptionsMenu() */
	@Override
	public boolean onPrepareOptionsMenu(Menu menu) {

		return super.onPrepareOptionsMenu(menu);
	}

	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		// The action bar home/up action should open or close the drawer.
		// ActionBarDrawerToggle will take care of this.
		if (mDrawerToggle.onOptionsItemSelected(item)) {
			return true;
		} else {
			return super.onOptionsItemSelected(item);
		}
	}

	/* The click listner for ListView in the navigation drawer */
	private class DrawerItemClickListener implements
			ListView.OnItemClickListener {
		@Override
		public void onItemClick(AdapterView<?> parent, View view, int position,
				long id) {
			selectItem(position);
		}
	}

	private void selectItem(int position) {
		// update the main content by replacing fragments
		Fragment fragment = new AnimalFragment();
		Bundle args = new Bundle();
		args.putInt(AnimalFragment.ARG_ANIMAL_NUMBER, position);
		fragment.setArguments(args);

		FragmentManager fragmentManager = getSupportFragmentManager();
		fragmentManager.beginTransaction()
				.replace(R.id.content_frame, fragment).commit();

		// update selected item and title, then close the drawer
		mDrawerList.setItemChecked(position, true);
		setTitle(mAnimalTitles[position]);
		mDrawerLayout.closeDrawer(mDrawerList);
	}

	@Override
	public void setTitle(CharSequence title) {
		mTitle = title;
		getSupportActionBar().setTitle(mTitle);
	}

	/**
	 * When using the ActionBarDrawerToggle, you must call it during
	 * onPostCreate() and onConfigurationChanged()...
	 */

	@Override
	protected void onPostCreate(Bundle savedInstanceState) {
		super.onPostCreate(savedInstanceState);
		// Sync the toggle state after onRestoreInstanceState has occurred.
		mDrawerToggle.syncState();
	}

	@Override
	public void onConfigurationChanged(Configuration newConfig) {
		super.onConfigurationChanged(newConfig);
		// Pass any configuration change to the drawer toggls
		mDrawerToggle.onConfigurationChanged(newConfig);
	}

	/**
	 * Listens for selection events of the spinner located on the action bar.
	 * Every time a new value is selected, the number of folds in the folding
	 * view is updated and is also restored to a default unfolded state.
	 */
	private class ItemSelectedListener implements OnItemSelectedListener {
		@Override
		public void onItemSelected(AdapterView<?> parent, View view, int pos,
				long id) {
			int mNumberOfFolds = Integer.parseInt(parent.getItemAtPosition(pos)
					.toString());

			mDrawerLayout.getFoldingLayout(mDrawerList).setNumberOfFolds(
					mNumberOfFolds);

		}

		@Override
		public void onNothingSelected(AdapterView<?> arg0) {
		}
	}
}