/*
 * 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.uima.ruta.action;

import java.util.List;
import java.util.Map;

import org.apache.uima.cas.Type;
import org.apache.uima.cas.text.AnnotationFS;
import org.apache.uima.ruta.RutaStream;
import org.apache.uima.ruta.expression.IRutaExpression;
import org.apache.uima.ruta.expression.string.IStringExpression;
import org.apache.uima.ruta.expression.type.ITypeExpression;
import org.apache.uima.ruta.rule.MatchContext;
import org.apache.uima.ruta.rule.RuleElement;
import org.apache.uima.ruta.rule.RuleMatch;
import org.apache.uima.ruta.visitor.InferenceCrowd;

public class FillAction extends AbstractStructureAction {

  private Map<IStringExpression, IRutaExpression> features;

  private ITypeExpression structureType;

  public FillAction(ITypeExpression structureType,
          Map<IStringExpression, IRutaExpression> features) {
    super();
    this.structureType = structureType;
    this.features = features;
  }

  @Override
  public void execute(MatchContext context, RutaStream stream, InferenceCrowd crowd) {
    RuleMatch match = context.getRuleMatch();
    RuleElement element = context.getElement();
    Type type = getStructureType().getType(context, stream);
    if (type == null) {
      return;
    }

    List<AnnotationFS> matchedAnnotations = match.getMatchedAnnotationsOfElement(element);
    for (AnnotationFS matchedAnnotation : matchedAnnotations) {
      if (matchedAnnotation == null) {
        return;
      }
      List<AnnotationFS> list = stream.getAnnotationsInWindow(matchedAnnotation, type);
      if (list.isEmpty()) {
        list = stream.getOverappingAnnotations(matchedAnnotation, type);
      }
      if (list.isEmpty()) {
        // look at the complete match of the rule
        List<AnnotationFS> matchedAnnotations2 = match.getMatchedAnnotations(null,
                element.getContainer());
        if (!matchedAnnotations2.isEmpty()) {
          AnnotationFS m = matchedAnnotations2.get(0);
          list = stream.getAnnotationsInWindow(m, type);
          if (list.isEmpty()) {
            list = stream.getOverappingAnnotations(m, type);
          }
        }
      }
      if (!list.isEmpty()) {
        AnnotationFS annotationFS = list.get(0);
        stream.getCas().removeFsFromIndexes(annotationFS);
        context.setAnnotation(matchedAnnotation);
        stream.assignFeatureValues(annotationFS, features, context);
        stream.getCas().addFsToIndexes(annotationFS);
        addAnnotationToLabel(annotationFS, context);
      }
    }

  }

  public Map<IStringExpression, IRutaExpression> getFeatures() {
    return features;
  }

  public ITypeExpression getStructureType() {
    return structureType;
  }

}