/*
    * 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.myfaces.tobago.facelets;
  
  import org.apache.myfaces.tobago.component.InputSuggest;
  import org.apache.myfaces.tobago.component.Visual;
  import org.apache.myfaces.tobago.config.TobagoConfig;
  import org.apache.myfaces.tobago.event.SheetStateChangeSource;
  import org.apache.myfaces.tobago.event.SortActionSource;
  import org.apache.myfaces.tobago.event.TabChangeSource;
  import org.apache.myfaces.tobago.internal.config.TobagoConfigImpl;
  
  import javax.enterprise.inject.spi.CDI;
  import javax.faces.component.EditableValueHolder;
  import javax.faces.component.UIComponent;
  import javax.faces.context.FacesContext;
  import javax.faces.validator.Validator;
  import javax.faces.view.facelets.ComponentConfig;
  import javax.faces.view.facelets.ComponentHandler;
  import javax.faces.view.facelets.FaceletContext;
  import javax.faces.view.facelets.MetaRuleset;
  import java.util.HashSet;
  import java.util.Map;
  import java.util.Set;
  
  public class TobagoComponentHandler extends ComponentHandler {
  
    public TobagoComponentHandler(final ComponentConfig componentConfig) {
      super(componentConfig);
    }
  
    @Override
    protected MetaRuleset createMetaRuleset(final Class aClass) {
      final MetaRuleset metaRuleset = super.createMetaRuleset(aClass);
      if (SortActionSource.class.isAssignableFrom(aClass)) {
        metaRuleset.addRule(SortActionSourceRule.INSTANCE);
      }
      if (TabChangeSource.class.isAssignableFrom(aClass)) {
        metaRuleset.addRule(TabChangeSourceRule.INSTANCE);
      }
      if (SheetStateChangeSource.class.isAssignableFrom(aClass)) {
        metaRuleset.addRule(SheetStateChangeSourceRule.INSTANCE);
      }
      if (Visual.class.isAssignableFrom(aClass)) {
        metaRuleset.addRule(SupportsMarkupRule.INSTANCE);
      }
      if (InputSuggest.class.isAssignableFrom(aClass)) {
        metaRuleset.addRule(SuggestMethodRule.INSTANCE);
      }
  
      return metaRuleset;
    }
  
    @Override
    public void onComponentPopulated(
        final FaceletContext context, final UIComponent component, final UIComponent parent) {
  
      // TODO call only if component was created
      if (component instanceof EditableValueHolder) {
        addDefaultValidators(context.getFacesContext(), (EditableValueHolder) component);
      }
    }
  
    private void addDefaultValidators(final FacesContext context, final EditableValueHolder component) {
      final TobagoConfigImpl tobagoConfig = (TobagoConfigImpl) CDI.current().select(TobagoConfig.class).get();
      final Map<String, String> validatorInfoMap = tobagoConfig.getDefaultValidatorInfo();
      if (validatorInfoMap.isEmpty()) {
        return;
      }
      final Validator[] validators = component.getValidators();
      if (validators.length > 0) {
        final Set<String> classNames = new HashSet<>();
        // collect classNames of validators
        for (final Validator validator : validators) {
          classNames.add(validator.getClass().getName());
        }
        validatorInfoMap.forEach((key, value) -> {
          if (!classNames.contains(value)) {
            component.addValidator(context.getApplication().createValidator(key));
          }
        });
      } else {
       for (final String next : validatorInfoMap.keySet()) {
         component.addValidator(context.getApplication().createValidator(next));
       }
     }
   }
 }