/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */

package org.apache.streampipes.processors.transformation.jvm.processor.booloperator.inverter;

import org.apache.streampipes.commons.exceptions.SpRuntimeException;
import org.apache.streampipes.extensions.api.pe.context.EventProcessorRuntimeContext;
import org.apache.streampipes.extensions.api.pe.routing.SpOutputCollector;
import org.apache.streampipes.model.DataProcessorType;
import org.apache.streampipes.model.graph.DataProcessorDescription;
import org.apache.streampipes.model.runtime.Event;
import org.apache.streampipes.model.schema.PropertyScope;
import org.apache.streampipes.sdk.builder.ProcessingElementBuilder;
import org.apache.streampipes.sdk.builder.StreamRequirementsBuilder;
import org.apache.streampipes.sdk.extractor.ProcessingElementParameterExtractor;
import org.apache.streampipes.sdk.helpers.EpRequirements;
import org.apache.streampipes.sdk.helpers.Labels;
import org.apache.streampipes.sdk.helpers.Locales;
import org.apache.streampipes.sdk.helpers.OutputStrategies;
import org.apache.streampipes.sdk.utils.Assets;
import org.apache.streampipes.wrapper.params.compat.ProcessorParams;
import org.apache.streampipes.wrapper.standalone.StreamPipesDataProcessor;

public class BooleanInverterProcessor extends StreamPipesDataProcessor {
  public static final String INVERT_FIELD_ID = "invert-field";
  private String invertFieldName;
  @Override
  public DataProcessorDescription declareModel() {
    return ProcessingElementBuilder.create("org.apache.streampipes.processors.transformation.jvm.booloperator.inverter")
        .category(DataProcessorType.BOOLEAN_OPERATOR)
        .withLocales(Locales.EN)
        .withAssets(Assets.DOCUMENTATION, Assets.ICON)
        .requiredStream(StreamRequirementsBuilder.create()
            .requiredPropertyWithUnaryMapping(
                EpRequirements.booleanReq(),
                Labels.withId(INVERT_FIELD_ID),
                PropertyScope.NONE)
            .build())
        .outputStrategy(OutputStrategies.keep())
        .build();
  }

  @Override
  public void onInvocation(ProcessorParams parameters,
                           SpOutputCollector spOutputCollector,
                           EventProcessorRuntimeContext runtimeContext) throws SpRuntimeException {
    ProcessingElementParameterExtractor extractor = parameters.extractor();
    this.invertFieldName = extractor.mappingPropertyValue(INVERT_FIELD_ID);
  }

  @Override
  public void onEvent(Event inputEvent, SpOutputCollector collector) throws SpRuntimeException {
    boolean field = inputEvent.getFieldBySelector(invertFieldName).getAsPrimitive().getAsBoolean();
    inputEvent.updateFieldBySelector(invertFieldName, !field);
    collector.collect(inputEvent);
  }

  @Override
  public void onDetach() throws SpRuntimeException {

  }
}
