import android.app.*;
import android.content.*;
import android.graphics.*;
import android.graphics.drawable.*;
import android.util.*;
import android.view.*;
import com.google.appinventor.components.annotations.SimpleFunction;
import com.google.appinventor.components.runtime.*;
import com.google.appinventor.components.runtime.util.*;

public class Base64ImageToComponent extends AndroidNonvisibleComponent {

  private final Context context;
  private final Activity activity;
  private final Form form;

  public Base64ImageToComponent(ComponentContainer container) {

    super(container.$form());
    this.form = container.$form();
    this.activity = form.$context();
    this.context = activity.getApplicationContext();
  }

  @SimpleFunction(description="Create bitmap from base64String and set as background to component. For some components, you will have to use the component's " +
          "image and backgroundColor blocks to remove any existing image or colour for this to be visible")
  public void SetBackgroundImageFromBase64(AndroidViewComponent component, String base64String) {
    final View view = component.getView();
    byte[] decodedString = Base64.decode(base64String, Base64.DEFAULT);
    Bitmap decodedByte = BitmapFactory.decodeByteArray(decodedString, 0, decodedString.length);
    Drawable backgroundImageDrawable = new BitmapDrawable(context.getResources(), decodedByte);
    backgroundImageDrawable = backgroundImageDrawable.getConstantState().newDrawable();
    ViewUtil.setBackgroundImage(view, backgroundImageDrawable);
  }

  @SimpleFunction(description="Clear base64Image from background of component")
  public void ClearBackgroundImage(AndroidViewComponent component) {
    final View view = component.getView();
    ViewUtil.setBackgroundImage(view, null);
  }