package edu.calpoly.android.lab4;



import android.content.Context;

import android.text.TextUtils.TruncateAt;

import android.view.LayoutInflater;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.Checkable;

import android.widget.RadioButton;

import android.widget.RadioGroup;

import android.widget.RelativeLayout;

import android.widget.TextView;

import android.widget.RadioGroup.OnCheckedChangeListener;



public class JokeView extends RelativeLayout implements OnClickListener, OnCheckedChangeListener, Checkable{



	private Button m_vwExpandButton;

	private RadioButton m_vwLikeButton;

	private RadioButton m_vwDislikeButton;

	private RadioGroup m_vwLikeGroup;

	private TextView m_vwJokeText;

	private Joke m_joke;

	private OnJokeChangeListener m_onJokeChangeListener;



	public static final String EXPAND = " + ";

	public static final String COLLAPSE = " - ";



	/**

	 * Basic Constructor that takes only takes in an application Context.

	 *

	 * @param context

	 *            The application Context in which this view is being added.

	 *

	 * @param joke

	 * 			  The Joke this view is responsible for displaying.

	 */

	public JokeView(Context context, Joke joke) {

		super(context);



		m_onJokeChangeListener = null;

		// Inflate the layout and set this JokeView as the root ViewGroup.

		((LayoutInflater)context

		 .getSystemService(Context.LAYOUT_INFLATER_SERVICE))

		 .inflate(R.layout.joke_view, this, true);



		// Initialize View member variables

		m_vwExpandButton = (Button)findViewById(R.id.expandButton);

		m_vwExpandButton.setOnClickListener(this);



		m_vwLikeGroup = (RadioGroup)findViewById(R.id.ratingRadioGroup);

		m_vwLikeGroup.setOnCheckedChangeListener(this);



		m_vwLikeButton = (RadioButton)findViewById(R.id.likeButton);



		m_vwDislikeButton = (RadioButton)findViewById(R.id.dislikeButton);



		m_vwJokeText= (TextView)findViewById(R.id.jokeTextView);



		setJoke(joke);



		collapseJokeView();

	}



	/**

	 * Mutator method for changing the Joke object this View displays. This View

	 * will be updated to display the correct contents of the new Joke.

	 *

	 * @param joke

	 *            The Joke object which this View will display.

	 */

	public void setJoke(Joke joke) {

		m_joke = joke;

		m_vwJokeText.setText(m_joke.getJoke());

		if (m_joke.getRating() == Joke.LIKE) {

			m_vwLikeButton.setChecked(true);

		}

		else if (m_joke.getRating() == Joke.DISLIKE) {

			m_vwDislikeButton.setChecked(true);

		}

		else {

			m_vwLikeGroup.clearCheck();

		}

	}



	/**

	 * This method encapsulates the logic necessary to update this view so that

	 * it displays itself in its "Expanded" form:

	 *

	 *  - Shows the complete text of the joke.

	 *

	 *  - Brings the RadioGroup of rating Buttons back into view.

	 */

	private void expandJokeView() {

		m_vwJokeText.setEllipsize(null);

		m_vwExpandButton.setText(COLLAPSE);

		m_vwLikeGroup.setVisibility(VISIBLE);

		requestLayout();

	}



	/**

	 * This method encapsulates the logic necessary to update this view so that

	 * it displays itself in its "Collapsed" form:

	 *

	 *  - Shows only the first line of text of the joke.

	 *

	 *  - If the joke is longer than one line, it appends an ellipsis to the end.

	 *

	 *  - Removes the RadioGroup of rating Buttons from view.

	 */

	private void collapseJokeView() {

		m_vwJokeText.setEllipsize(TruncateAt.END);

		m_vwExpandButton.setText(EXPAND);

		m_vwLikeGroup.setVisibility(GONE);

		requestLayout();

	}



	@Override

	public void onClick(View v) {

		if (m_vwExpandButton.getText().toString()== EXPAND) {

			expandJokeView();

		}

		else {

			collapseJokeView();

		}

	}



	@Override

	public void onCheckedChanged(RadioGroup arg0, int checkedId) {

		if (checkedId == R.id.likeButton) {

			m_joke.setRating(Joke.LIKE);

		}

		else if (checkedId == R.id.dislikeButton) {

			m_joke.setRating(Joke.DISLIKE);

		}

		else if (checkedId == -1) {

			m_joke.setRating(Joke.UNRATED);

		}

		notifyOnJokeChangeListener();

	}



	@Override

	public boolean isChecked() {

		if (m_vwExpandButton.getText().toString()== EXPAND) {

			return false;

		}

		else {

			return true;

		}

	}



	@Override

	public void setChecked(boolean checked) {

		if (checked) {

			expandJokeView();

		}

		else {

			collapseJokeView();

		}

	}



	@Override

	public void toggle() {

		setChecked(!isChecked());

	}



	/**

	 * Mutator method for changing the OnJokeChangeListener object this JokeView

	 * notifies when the state its underlying Joke object changes.

	 *

	 * It is possible and acceptable for m_onJokeChangeListener to be null, you

	 * should allow for this.

	 *

	 * @param listener

	 *            The OnJokeChangeListener object that should be notified when

	 *            the underlying Joke changes state.

	 */

	public void setOnJokeChangeListener(OnJokeChangeListener listener) {

		// TODO

		m_onJokeChangeListener = listener;

	}



	/**

	 * This method should always be called after the state of m_joke is changed.

	 *

	 * It is possible and acceptable for m_onJokeChangeListener to be null, you

	 * should test for this.

	 *

	 * This method should not be called if setJoke(...) is called, since the

	 * internal state of the Joke object that m_joke references is not be

	 * changed. Rather, m_joke reference is being changed to reference a

	 * different Joke object.

	 */

	protected void notifyOnJokeChangeListener() {

		// TODO

	}



	/**

	 * Interface definition for a callback to be invoked when the underlying

	 * Joke is changed in this JokeView object.

	 *

	 */

	public static interface OnJokeChangeListener {



		/**

		 * Called when the underlying Joke in a JokeView object changes state.

		 *

		 * @param view

		 *            The JokeView in which the Joke was changed.

		 * @param joke

		 *            The Joke that was changed.

		 */

		public void onJokeChanged(JokeView view, Joke joke);

	}



}