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package org.anddev.andengine.examples;

import javax.microedition.khronos.opengles.GL10;

import org.anddev.andengine.engine.Engine;
import org.anddev.andengine.engine.camera.Camera;
import org.anddev.andengine.engine.camera.hud.controls.BaseOnScreenControl;
import org.anddev.andengine.engine.camera.hud.controls.BaseOnScreenControl.IOnScreenControlListener;
import org.anddev.andengine.engine.camera.hud.controls.DigitalOnScreenControl;
import org.anddev.andengine.engine.handler.physics.PhysicsHandler;
import org.anddev.andengine.engine.options.EngineOptions;
import org.anddev.andengine.engine.options.EngineOptions.ScreenOrientation;
import org.anddev.andengine.engine.options.resolutionpolicy.RatioResolutionPolicy;
import org.anddev.andengine.entity.scene.Scene;
import org.anddev.andengine.entity.scene.background.ColorBackground;
import org.anddev.andengine.entity.sprite.Sprite;
import org.anddev.andengine.entity.util.FPSLogger;
import org.anddev.andengine.opengl.texture.TextureOptions;
import org.anddev.andengine.opengl.texture.atlas.bitmap.BitmapTextureAtlas;
import org.anddev.andengine.opengl.texture.atlas.bitmap.BitmapTextureAtlasTextureRegionFactory;
import org.anddev.andengine.opengl.texture.region.TextureRegion;

import android.app.AlertDialog;
import android.app.Dialog;
import android.content.DialogInterface;

/**
 * (c) 2010 Nicolas Gramlich
 * (c) 2011 Zynga
 *
 * @author Nicolas Gramlich
 * @since 00:06:23 - 11.07.2010
 */
public class DigitalOnScreenControlExample extends BaseExample {
	// ===========================================================
	// Constants
	// ===========================================================

	private static final int CAMERA_WIDTH = 480;
	private static final int CAMERA_HEIGHT = 320;
	private static final int DIALOG_ALLOWDIAGONAL_ID = 0;

	// ===========================================================
	// Fields
	// ===========================================================

	private Camera mCamera;

	private BitmapTextureAtlas mBitmapTextureAtlas;
	private TextureRegion mFaceTextureRegion;

	private BitmapTextureAtlas mOnScreenControlTexture;
	private TextureRegion mOnScreenControlBaseTextureRegion;
	private TextureRegion mOnScreenControlKnobTextureRegion;

	private DigitalOnScreenControl mDigitalOnScreenControl;

	// ===========================================================
	// Constructors
	// ===========================================================

	// ===========================================================
	// Getter & Setter
	// ===========================================================

	// ===========================================================
	// Methods for/from SuperClass/Interfaces
	// ===========================================================

	@Override
	public Engine onLoadEngine() {
		this.mCamera = new Camera(0, 0, CAMERA_WIDTH, CAMERA_HEIGHT);
		return new Engine(new EngineOptions(true, ScreenOrientation.LANDSCAPE, new RatioResolutionPolicy(CAMERA_WIDTH, CAMERA_HEIGHT), this.mCamera));
	}

	@Override
	public void onLoadResources() {
		BitmapTextureAtlasTextureRegionFactory.setAssetBasePath("gfx/");

		this.mBitmapTextureAtlas = new BitmapTextureAtlas(32, 32, TextureOptions.BILINEAR_PREMULTIPLYALPHA);
		this.mFaceTextureRegion = BitmapTextureAtlasTextureRegionFactory.createFromAsset(this.mBitmapTextureAtlas, this, "face_box.png", 0, 0);

		this.mOnScreenControlTexture = new BitmapTextureAtlas(256, 128, TextureOptions.BILINEAR_PREMULTIPLYALPHA);
		this.mOnScreenControlBaseTextureRegion = BitmapTextureAtlasTextureRegionFactory.createFromAsset(this.mOnScreenControlTexture, this, "onscreen_control_base.png", 0, 0);
		this.mOnScreenControlKnobTextureRegion = BitmapTextureAtlasTextureRegionFactory.createFromAsset(this.mOnScreenControlTexture, this, "onscreen_control_knob.png", 128, 0);

		this.mEngine.getTextureManager().loadTextures(this.mBitmapTextureAtlas, this.mOnScreenControlTexture);
	}

	@Override
	public Scene onLoadScene() {
		this.mEngine.registerUpdateHandler(new FPSLogger());

		final Scene scene = new Scene();
		scene.setBackground(new ColorBackground(0.09804f, 0.6274f, 0.8784f));

		final int centerX = (CAMERA_WIDTH - this.mFaceTextureRegion.getWidth()) / 2;
		final int centerY = (CAMERA_HEIGHT - this.mFaceTextureRegion.getHeight()) / 2;
		final Sprite face = new Sprite(centerX, centerY, this.mFaceTextureRegion);
		final PhysicsHandler physicsHandler = new PhysicsHandler(face);
		face.registerUpdateHandler(physicsHandler);

		scene.attachChild(face);

		this.mDigitalOnScreenControl = new DigitalOnScreenControl(0, CAMERA_HEIGHT - this.mOnScreenControlBaseTextureRegion.getHeight(), this.mCamera, this.mOnScreenControlBaseTextureRegion, this.mOnScreenControlKnobTextureRegion, 0.1f, new IOnScreenControlListener() {
			@Override
			public void onControlChange(final BaseOnScreenControl pBaseOnScreenControl, final float pValueX, final float pValueY) {
				physicsHandler.setVelocity(pValueX * 100, pValueY * 100);
			}
		});
		this.mDigitalOnScreenControl.getControlBase().setBlendFunction(GL10.GL_SRC_ALPHA, GL10.GL_ONE_MINUS_SRC_ALPHA);
		this.mDigitalOnScreenControl.getControlBase().setAlpha(0.5f);
		this.mDigitalOnScreenControl.getControlBase().setScaleCenter(0, 128);
		this.mDigitalOnScreenControl.getControlBase().setScale(1.25f);
		this.mDigitalOnScreenControl.getControlKnob().setScale(1.25f);
		this.mDigitalOnScreenControl.refreshControlKnobPosition();

		scene.setChildScene(this.mDigitalOnScreenControl);

		return scene;
	}

	@Override
	public void onLoadComplete() {
		this.showDialog(DIALOG_ALLOWDIAGONAL_ID);
	}

	@Override
	protected Dialog onCreateDialog(final int pID) {
		switch(pID) {
			case DIALOG_ALLOWDIAGONAL_ID:
				return new AlertDialog.Builder(this)
				.setTitle("Setup...")
				.setMessage("Do you wish to allow diagonal directions on the OnScreenControl?")
				.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
					@Override
					public void onClick(final DialogInterface pDialog, final int pWhich) {
						DigitalOnScreenControlExample.this.mDigitalOnScreenControl.setAllowDiagonal(true);
					}
				})
				.setNegativeButton("No", new DialogInterface.OnClickListener() {
					@Override
					public void onClick(final DialogInterface pDialog, final int pWhich) {
						DigitalOnScreenControlExample.this.mDigitalOnScreenControl.setAllowDiagonal(false);
					}
				})
				.create();
		}
		return super.onCreateDialog(pID);
	}

	// ===========================================================
	// Methods
	// ===========================================================

	// ===========================================================
	// Inner and Anonymous Classes
	// ===========================================================
}