/*******************************************************************************
 * 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.List;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;

import org.apache.log4j.Logger;

import at.gv.egiz.eaaf.core.impl.utils.KeyValueUtils;
import at.gv.egovernment.moa.id.commons.MOAIDAuthConstants;
import at.gv.egovernment.moa.id.commons.validation.ValidationHelper;
import at.gv.egovernment.moa.id.configuration.data.oa.OAAuthenticationData;
import at.gv.egovernment.moa.id.configuration.helper.LanguageHelper;
import at.gv.egovernment.moa.util.MiscUtil;

public class OAAuthenticationDataValidation {

	private static final Logger log = Logger.getLogger(OASSOConfigValidation.class);
	
	public List<String> validate(OAAuthenticationData form, boolean isAdmin, HttpServletRequest request) {
		
		List<String> errors = new ArrayList<String>();
		String check;
		

		
		//Check BKU URLs
		if (isAdmin) {
			check =form.getBkuHandyURL();
			if (MiscUtil.isNotEmpty(check)) {
//				log.info("Empty Handy-BKU URL");
//				errors.add(LanguageHelper.getErrorString("validation.general.bku.handy.empty"));
//				
//			} else {
				if (!ValidationHelper.validateURL(check)) {
					log.info("Not valid Handy-BKU URL");
					errors.add(LanguageHelper.getErrorString("validation.general.bku.handy.valid", request));
				}
			}
			
			check =form.getBkuLocalURL();
			if (MiscUtil.isNotEmpty(check)) {
//				log.info("Empty Local-BKU URL");
//				errors.add(LanguageHelper.getErrorString("validation.general.bku.local.empty"));
//				
//			} else {
				if (!ValidationHelper.validateURL(check)) {
					log.info("Not valid Online-BKU URL");
					errors.add(LanguageHelper.getErrorString("validation.general.bku.local.valid", request));
				}
			}
			
			check =form.getBkuOnlineURL();
			if (MiscUtil.isNotEmpty(check)) {
//				log.info("Empty Online-BKU URL");
//				errors.add(LanguageHelper.getErrorString("validation.general.bku.online.empty"));
//				
//			} else {
				if (!ValidationHelper.validateURL(check)) {
					log.info("Not valid Online-BKU URL");
					errors.add(LanguageHelper.getErrorString("validation.general.bku.online.valid", request));
				}
			}
		}
		
		if (isAdmin) {
			//check KeyBoxIdentifier
			check = form.getKeyBoxIdentifier();
			if (MiscUtil.isEmpty(check)) {
				log.info("Empty KeyBoxIdentifier");
				errors.add(LanguageHelper.getErrorString("validation.general.keyboxidentifier.empty", request));
			} else {
				Map<String, String> list = form.getKeyBoxIdentifierList();
				if (!list.containsKey(check)) {
					log.info("Not valid KeyBoxIdentifier " + check);
					errors.add(LanguageHelper.getErrorString("validation.general.keyboxidentifier.valid", request));
				}
			}
			
			//check LegacyMode SLTemplates
			if (form.isLegacy()) {
				if (MiscUtil.isEmpty(form.getSLTemplateURL1()) &&
					MiscUtil.isEmpty(form.getSLTemplateURL2()) &&
					MiscUtil.isEmpty(form.getSLTemplateURL3()) ) {
						log.info("Empty OA-specific SecurityLayer Templates");
						errors.add(LanguageHelper.getErrorString("validation.general.sltemplates.empty", request));
						
				} else {
					check = form.getSLTemplateURL1();
					if (MiscUtil.isNotEmpty(check) &&
						ValidationHelper.isNotValidIdentityLinkSigner(check)	) {
							log.info("First OA-specific SecurityLayer Templates is not valid");
							errors.add(LanguageHelper.getErrorString("validation.general.sltemplate1.valid", request));
					}
					check = form.getSLTemplateURL2();
					if (MiscUtil.isNotEmpty(check) &&
						ValidationHelper.isNotValidIdentityLinkSigner(check)	) {
							log.info("Second OA-specific SecurityLayer Templates is not valid");
							errors.add(LanguageHelper.getErrorString("validation.general.sltemplate2.valid", request));
					}
					check = form.getSLTemplateURL3();
					if (MiscUtil.isNotEmpty(check) &&
						ValidationHelper.isNotValidIdentityLinkSigner(check)	) {
							log.info("Third OA-specific SecurityLayer Templates is not valid");
							errors.add(LanguageHelper.getErrorString("validation.general.sltemplate3.valid", request));
					}
				}	
			}
		}
		
		//check Mandate Profiles
		check = form.getMandateProfiles();
		if (MiscUtil.isNotEmpty(check)) {
			
			if (!form.isUseMandates()) {
				log.info("MandateProfiles configured but useMandates is false.");
				errors.add(LanguageHelper.getErrorString("validation.general.mandate.usemandate", request));
			}
			
			if (ValidationHelper.containsNotValidCharacter(check, true)) {
				log.warn("MandateProfiles contains potentail XSS characters: " + check);
				errors.add(LanguageHelper.getErrorString("validation.general.mandate.profiles", 
						new Object[] {ValidationHelper.getNotValidCharacter(true)}, request ));
			}
		}
		
		check =form.getMisServiceSelected();
		if (MiscUtil.isNotEmpty(check)) {
			if (!ValidationHelper.validateURL(check)) {
				log.info("Not valid MIS Service URL");
				errors.add(LanguageHelper.getErrorString("validation.general.mandateservice.valid", 
						new Object[]{check}, request));
			}
		}
		
		check =form.getElgaServiceSelected();
		if (MiscUtil.isNotEmpty(check)) {
			if (!ValidationHelper.validateURL(check)) {
				log.info("Not valid ELGA Service URL");
				errors.add(LanguageHelper.getErrorString("validation.general.elga.mandateservice.valid", 
						new Object[]{check}, request));
			}
		}
		
		check =form.getSzrgwServiceSelected();
		if (MiscUtil.isNotEmpty(check)) {
			if (!ValidationHelper.validateURL(check)) {
				log.info("Not valid SZR-GW Service URL");
				errors.add(LanguageHelper.getErrorString("validation.general.szrgw.url.valid", 
						new Object[]{check}, request));
			}
		}
		
		check =form.getEidServiceSelected();
		if (MiscUtil.isNotEmpty(check)) {
			if (!ValidationHelper.validateURL(check)) {
				log.info("Not valid E-ID Service URL");
				errors.add(LanguageHelper.getErrorString("validation.general.eid.url.valid", 
						new Object[]{check}, request));
			}
		}
		
		if (form.isEnableTestCredentials() 
				&& form.getTestCredialOIDList() != null && !form.getTestCredialOIDList().isEmpty()) {
			for (String el : form.getTestCredialOIDList()) {
				if (!el.startsWith(MOAIDAuthConstants.TESTCREDENTIALROOTOID)) {
					log.warn("Test credential OID does not start with test credential root OID");
					errors.add(LanguageHelper.getErrorString("validation.general.testcredentials.oid.valid", 
						new Object[] {el}, request ));
				}
			}
			
			
		}
		
		if (form.isSl20Active()) {
			if (MiscUtil.isNotEmpty(form.getSl20EndPoints())) {
				log.debug("Validate SL2.0 configuration ... ");				
				List<String> sl20Endpoints = KeyValueUtils.getListOfCSVValues(form.getSl20EndPoints());
				if (sl20Endpoints.size() == 1) {
					String value = sl20Endpoints.get(0);
					
					if (!value.startsWith(KeyValueUtils.DEFAULT_VALUE + KeyValueUtils.KEYVVALUEDELIMITER) && 
							value.contains(KeyValueUtils.KEYVVALUEDELIMITER)) {
						log.warn("SL2.0 endpoint '" + value + "' has wrong format");
						errors.add(LanguageHelper.getErrorString("validation.general.sl20.endpoints.wrong", 
							new Object[] {value}, request ));
												
					} else if (!value.startsWith(KeyValueUtils.DEFAULT_VALUE + KeyValueUtils.KEYVVALUEDELIMITER) && 
							!value.contains(KeyValueUtils.KEYVVALUEDELIMITER) ) {
						log.info("Find one SL2.0 endpoint without 'default='. Start update ... ");
						form.setSl20EndPoints(KeyValueUtils.DEFAULT_VALUE + KeyValueUtils.KEYVVALUEDELIMITER + value);	
						
					}
					
				} else {
					boolean findDefault = false;
					for (String el : sl20Endpoints) {
						if (!el.contains(KeyValueUtils.KEYVVALUEDELIMITER)) {
							log.warn("SL2.0 endpoint '" + el + "' has wrong format");
							errors.add(LanguageHelper.getErrorString("validation.general.sl20.endpoints.wrong", 
								new Object[] {el}, request ));
							
						} else {
							if (el.startsWith(KeyValueUtils.DEFAULT_VALUE + KeyValueUtils.KEYVVALUEDELIMITER)) {
								log.debug("Find default endpoint.");
								findDefault = true;
								
							} else {
								String firstPart = el.split(KeyValueUtils.KEYVVALUEDELIMITER)[0];
								try {	
									Integer.valueOf(firstPart);
									
								} catch (NumberFormatException e) {
									log.warn("SL2.0 endpoint '" + el + "' has wrong format", e);
									errors.add(LanguageHelper.getErrorString("validation.general.sl20.endpoints.wrong", 
											new Object[] {el}, request ));
									
								}																										
							}							
						}
					}
					
					if (!findDefault) {
						log.warn("SL2.0 endpoints contains NO default endpoint");
						errors.add(LanguageHelper.getErrorString("validation.general.sl20.endpoints.default", 
								new Object[] {}, request ));
						
					}
				}								
			}			
		}
		
		return errors;
	}
}