package io.autodidact.visibilitytracker;

import android.graphics.Rect;
import android.util.Log;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import com.facebook.react.bridge.Dynamic;
import com.facebook.react.common.MapBuilder;
import com.facebook.react.uimanager.ThemedReactContext;
import com.facebook.react.uimanager.UIManagerModule;
import com.facebook.react.uimanager.annotations.ReactProp;
import com.facebook.react.uimanager.events.EventDispatcher;
import com.facebook.react.views.view.ReactViewGroup;
import com.facebook.react.views.view.ReactViewManager;
import java.util.Map;

public class VisibilityTrackerManager extends ReactViewManager {

  @Override
  public String getName() {
    return VisibilityTrackerModule.NAME;
  }

  @Override
  public ReactViewGroup createViewInstance(ThemedReactContext context) {
    return new VisibilityTracker(context);
  }

  @ReactProp(name = VisibilityEvent.VISIBILITY_EVENT_NAME)
  public void shouldDispatchEvent(
    VisibilityTracker view,
    @Nullable Dynamic callback
  ) {
    view.setShouldDispatchEvent(callback != null);
  }

  @Override
  protected void addEventEmitters(
    @NonNull final ThemedReactContext reactContext,
    @NonNull final ReactViewGroup view
  ) {
    final EventDispatcher eventDispatcher = reactContext
      .getNativeModule(UIManagerModule.class)
      .getEventDispatcher();
    ((VisibilityTracker) view).setVisibilityListener(
        new VisibilityTracker.VisibilityListener() {
          @Override
          public void onChange(boolean isVisible, boolean dispatchEvent) {
            if (dispatchEvent) {
              VisibilityEvent e = VisibilityEvent.obtain(
                view.getId(),
                isVisible
              );
              eventDispatcher.dispatchEvent(e);
            }
          }
        }
      );
  }

  @Nullable
  @Override
  public Map<String, Object> getExportedCustomDirectEventTypeConstants() {
    return MapBuilder
      .<String, Object>builder()
      .put(
        VisibilityEvent.VISIBILITY_EVENT_NAME,
        MapBuilder.of("registrationName", VisibilityEvent.VISIBILITY_EVENT_NAME)
      )
      .build();
  }
}