package at.gv.egovernment.moa.id.protocols.eidas.attributes.builder.eid4u;

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.ISPConfiguration;
import at.gv.egiz.eaaf.core.exceptions.AttributeBuilderException;
import at.gv.egiz.eid4u.api.attributes.Definitions;
import at.gv.egovernment.moa.id.protocols.eidas.attributes.builder.IeIDASAttribute;
import at.gv.egovernment.moa.id.protocols.eidas.attributes.builder.eIDASMetadata;

@eIDASMetadata
public class FieldOfStudyAttrBuilder implements IeIDASAttribute {

	private static final String DELIMITER = ";";
	private static final String UNDEFINED_CODE = "9999";
	
	@Override
	public <ATT> ATT build(ISPConfiguration oaParam, IAuthData authData, IAttributeGenerator<ATT> g)
			throws AttributeBuilderException {
		
		String idType= authData.getGenericData(getName(), String.class);
		if (StringUtils.isNotEmpty(idType)) {
			String[] split = idType.split(DELIMITER);
			if (split.length > 1) {
				String currentSelected = UNDEFINED_CODE;
				for (String el : split) {
					if (!el.equals(currentSelected)) {
						//select first that is not undefined code
						currentSelected = el;
						break;
					}
											
				}
				
				idType = currentSelected;
			}
				
			
			return g.buildStringAttribute(Definitions.FIELDOFSTUDY_FRIENDLYNAME, getName(), idType);
		
		} else
			throw new AttributeBuilderException("Attribute '" + getName() + "' is not available");
		
	}

	@Override
	public <ATT> ATT buildEmpty(IAttributeGenerator<ATT> g) {
		return g.buildEmptyAttribute(Definitions.FIELDOFSTUDY_FRIENDLYNAME, getName());
	}

	@Override
	public String getName() {
		return Definitions.FIELDOFSTUDY_NAME;
		
	}

}