package com.xtremelabs.robolectric.shadows;

import android.content.Context;
import android.media.MediaPlayer;
import android.net.Uri;

import com.xtremelabs.robolectric.internal.Implementation;
import com.xtremelabs.robolectric.internal.Implements;
import com.xtremelabs.robolectric.internal.RealObject;

import static com.xtremelabs.robolectric.Robolectric.shadowOf;

/**
 * Shadows the Android {@code MediaPlayer} class.
 */
@Implements(MediaPlayer.class)
public class ShadowMediaPlayer {

	@RealObject private MediaPlayer player;

	private boolean playing;
	private boolean prepared;
	private int currentPosition;
	private Uri sourceUri;
	private int sourceResId;
	private MediaPlayer.OnCompletionListener completionListener;
	private MediaPlayer.OnPreparedListener preparedListener;
	
	@Implementation
	public static MediaPlayer create(Context context, int resId) {
		MediaPlayer mp = new MediaPlayer();
		shadowOf(mp).sourceResId = resId;
		try {
			mp.prepare();
		} catch (Exception e) { return null; }
		
		return mp;
	}
	
	@Implementation
	public static MediaPlayer create(Context context, Uri uri) {
		MediaPlayer mp = new MediaPlayer();
		try {
			mp.setDataSource(context, uri);
			mp.prepare();
		} catch (Exception e) { return null; }
		
		return mp;
	}
	
	public void __constructor__() {
		playing = true;
	}
	
	@Implementation
	public void	setDataSource(Context context, Uri uri) {
		this.sourceUri = uri;
	}
	
	@Implementation
	public void setOnCompletionListener(MediaPlayer.OnCompletionListener listener) {
		completionListener = listener;
	}
	
	@Implementation
	public void setOnPreparedListener(MediaPlayer.OnPreparedListener listener) {
		preparedListener = listener;
	}
	
	@Implementation
	public boolean isPlaying() {
		return playing;
	}
	
	@Implementation
	public void prepare() {
		prepared = true;
		invokePreparedListener();
	}
	
	/**
	 * Test cases are expected to simulate completion of the 'prepare' phase
	 * by manually invoking {@code #invokePreparedListener}.
	 */
	@Implementation
	public void prepareAsync() {
		prepared = true;
	}
	
	@Implementation
	public void start() {
		playing = true;
	}
	
	@Implementation
	public void pause() {
		playing = false;
	}
	
	@Implementation
	public void release() {
		playing = false;
		prepared = false;
	}

	@Implementation
	public void reset() {
		playing = false;
		prepared = false;
	}

	@Implementation
	public void stop() {
		playing = false;
	}
	
	@Implementation
    public int getCurrentPosition() {
        return currentPosition;
    }

    public void setCurrentPosition(int position) {
        currentPosition = position;
    }
    
    /**
     * Non-Android accessor.  Use for assertions.
     * @return
     */
    public Uri getSourceUri() {
    	return sourceUri;
    }
    
    /**
     * Non-Android accessor.  Use for assertions.
     * @return
     */
    public int getSourceResId() {
    	return sourceResId;
    }
    
    /**
     * Non-Android accessor.  Use for assertions.
     * @return
     */
    public boolean isPrepared() {
    	return prepared;
    }
    
    /**
     * Non-Android accessor.  Use for assertions.
     * @return
     */
    public MediaPlayer.OnCompletionListener getOnCompletionListener() {
    	return completionListener;
    }

    /**
     * Non-Android accessor.  Use for assertions.
     * @return
     */
    public MediaPlayer.OnPreparedListener getOnPreparedListener() {
    	return preparedListener;
    }
    
    /**
     * Allows test cases to simulate 'prepared' state by invoking callback.
     */
    public void invokePreparedListener() {
    	if (preparedListener == null) return;
    	preparedListener.onPrepared( player );
    }
    
    /**
     * Allows test cases to simulate 'completed' state by invoking callback.
     */
    public void invokeCompletionListener() {
    	if (completionListener == null) return;
    	completionListener.onCompletion( player );
    }    
}