package at.gv.egovernment.moa.id.auth.modules.ehvd.attributes;

import org.apache.commons.lang3.StringUtils;

import at.gv.egiz.eaaf.core.api.idp.IAttributeGenerator;
import at.gv.egiz.eaaf.core.api.idp.IAuthData;
import at.gv.egiz.eaaf.core.api.idp.IPVPAttributeBuilder;
import at.gv.egiz.eaaf.core.api.idp.ISPConfiguration;
import at.gv.egiz.eaaf.core.exceptions.AttributeBuilderException;
import at.gv.egovernment.moa.id.auth.modules.ehvd.ConfigurationProperties;
import at.gv.egovernment.moa.id.auth.modules.ehvd.client.wsdl.GdaDescriptor;
import at.gv.egovernment.moa.logging.Logger;

public abstract class AbstractEhvdAttributeBuilder implements IPVPAttributeBuilder {

  @Override
  public <ATT> ATT build(ISPConfiguration spConfig, IAuthData authData, IAttributeGenerator<ATT> g)
      throws AttributeBuilderException {
    try {
      GdaDescriptor fullGdaInfo = 
          authData.getGenericData(ConfigurationProperties.ATTRIBUTE_URN_EHVD_PREFIX, GdaDescriptor.class);
    
      if (fullGdaInfo != null) {
        String attrValue = generateAttributeValue(fullGdaInfo);
        Logger.debug(StringUtils.isEmpty(attrValue) ? "Skip" : "Build" 
            + "attribute: " + getName());      
        return g.buildStringAttribute(getName(), getName(), 
            StringUtils.isNotEmpty(attrValue) ? attrValue : null);
      
      } else {
        Logger.trace("Skipping attr: " + getName() + " because no GDA info available");
        return null;
        
      }
      
    } catch (ClassCastException e) {
      Logger.trace("Skipping attr: " + getName() + " because no GDA info available");
      return null;
      
    }
  }

  @Override
  public <ATT> ATT buildEmpty(IAttributeGenerator<ATT> g) {
    return g.buildEmptyAttribute(getName(), getName());
    
  }
  
  protected abstract String generateAttributeValue(GdaDescriptor fullGdaInfo);

}