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package mortar.dagger1support;

import android.app.Activity;
import android.content.Context;
import dagger.ObjectGraph;
import mortar.MortarScope;

/**
 * Provides utility methods for using Mortar with Dagger 1.
 */
public class ObjectGraphService {
  public static final String SERVICE_NAME = ObjectGraphService.class.getName();

  /**
   * Create a new {@link ObjectGraph} based on the given module. The new graph will extend
   * the graph found in the parent scope (via {@link ObjectGraph#plus}), if there is one.
   */
  public static ObjectGraph create(MortarScope parent, Object... daggerModules) {
    ObjectGraph parentGraph = getObjectGraph(parent);

    return parentGraph == null ? ObjectGraph.create(daggerModules)
        : parentGraph.plus(daggerModules);
  }

  public static ObjectGraph getObjectGraph(Context context) {
    //noinspection ResourceType
    return (ObjectGraph) context.getSystemService(ObjectGraphService.SERVICE_NAME);
  }

  public static ObjectGraph getObjectGraph(MortarScope scope) {
    return scope.getService(ObjectGraphService.SERVICE_NAME);
  }

  /**
   * A convenience wrapper for {@link ObjectGraphService#getObjectGraph} to simplify dynamic
   * injection, typically for {@link Activity} and {@link android.view.View} instances that must be
   * instantiated by Android.
   */
  public static void inject(Context context, Object object) {
    getObjectGraph(context).inject(object);
  }

  /**
   * A convenience wrapper for {@link ObjectGraphService#getObjectGraph} to simplify dynamic
   * injection, typically for {@link Activity} and {@link android.view.View} instances that must be
   * instantiated by Android.
   */
  public static void inject(MortarScope scope, Object object) {
    getObjectGraph(scope).inject(object);
  }
}