/*******************************************************************************
 * Copyright 2014 Federal Chancellery Austria
 * MOA-ID has been developed in a cooperation between BRZ, the Federal
 * Chancellery Austria - ICT staff unit, and Graz University of Technology.
 *
 * Licensed under the EUPL, Version 1.1 or - as soon they will be approved by
 * the European Commission - subsequent versions of the EUPL (the "Licence");
 * You may not use this work except in compliance with the Licence.
 * You may obtain a copy of the Licence at:
 * http://www.osor.eu/eupl/
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the Licence is distributed on an "AS IS" basis,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the Licence for the specific language governing permissions and
 * limitations under the Licence.
 *
 * This product combines work with different licenses. See the "NOTICE" text
 * file for details on the various modules and licenses.
 * The "NOTICE" text file is part of the distribution. Any derivative works
 * that you distribute must include a readable copy of the "NOTICE" text file.
 *******************************************************************************/
package at.gv.egovernment.moa.id.configuration.validation.oa;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import javax.servlet.http.HttpServletRequest;

import org.apache.log4j.Logger;

import at.gv.egovernment.moa.id.commons.MOAIDConstants;
import at.gv.egovernment.moa.id.commons.db.dao.config.deprecated.AttributeProviderPlugin;
import at.gv.egovernment.moa.id.commons.validation.ValidationHelper;
import at.gv.egovernment.moa.id.configuration.data.oa.OASTORKConfig;
import at.gv.egovernment.moa.id.configuration.helper.LanguageHelper;
import at.gv.egovernment.moa.util.MiscUtil;

public class OASTORKConfigValidation {

	private static final Logger log = Logger.getLogger(OASTORKConfigValidation.class);

	public List<String> validate(OASTORKConfig oageneral, HttpServletRequest request) {

		List<String> errors = new ArrayList<String>();

		// check qaa
		String qaa = oageneral.getQaa();
		if (MiscUtil.isNotEmpty(qaa) && !MOAIDConstants.ALLOWED_eIDAS_LOA.contains(qaa)) {
			log.warn("eIDAS LoA is not allowed : " + qaa);
			errors.add(LanguageHelper.getErrorString("validation.stork.qaa.outofrange",
					new Object[] {qaa}, request ));
		}
		
		if (oageneral.isVidpEnabled()) {		
			Iterator<AttributeProviderPlugin> interator = oageneral.getAttributeProviderPlugins().iterator();				
			while (interator.hasNext()) {
				AttributeProviderPlugin current = interator.next();
				if (MiscUtil.isEmpty(current.getUrl()) || !ValidationHelper.validateURL(current.getUrl())) {
					log.info("AttributeProviderPlugin URL has no valid form.");
					errors.add(LanguageHelper.getErrorString("validation.stork.ap.url.valid", request));
				}
				if (MiscUtil.isEmpty(current.getName())) {
					log.info("AttributeProviderPlugin Name is empty.");
					errors.add(LanguageHelper.getErrorString("validation.stork.ap.name.empty", request));
					
				} else {
					if (!oageneral.getAvailableAttributeProviderPlugins().contains(current.getName())) {
						log.info("AttributeProviderPlugin Name is not supported.");
						errors.add(LanguageHelper.getErrorString("validation.stork.ap.name.valid", request));
					}				
				}
				
				if (MiscUtil.isEmpty(current.getAttributes()) || !current.getAttributes().matches("[a-zA-Z]+(, ?[a-zA-Z]+)*")) {
					log.info("AttributeProviderPlugin attributes are empty or do not match csv format.");
					errors.add(LanguageHelper.getErrorString("validation.stork.ap.attributes.valid", request));
				}
			}
			
		} else {
			oageneral.setAttributeProviderPlugins(null);
		}

		return errors;
	}
}