/*-
 * ============LICENSE_START=======================================================
 * PolicyEngineUtils
 * ================================================================================
 * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
 * ================================================================================
 * Licensed 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.
 * ============LICENSE_END=========================================================
 */

package org.openecomp.policy.utils;

import java.io.IOException;
import java.util.Base64;
import java.util.StringTokenizer;

import com.fasterxml.jackson.core.JsonParseException;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JsonMappingException;
import com.fasterxml.jackson.databind.ObjectMapper;

public class PolicyUtils {
	
	public static String objectToJsonString(Object o) throws JsonProcessingException{
		ObjectMapper mapper = new ObjectMapper();
		return mapper.writeValueAsString(o);
	}
	
	public static <T> T jsonStringToObject(String jsonString, Class<T> className) throws JsonParseException, JsonMappingException, IOException{
		ObjectMapper mapper = new ObjectMapper();
		T t = mapper.readValue(jsonString, className);
		return t;
	}
	
	public static String[] decodeBasicEncoding(String encodedValue) throws Exception{
		if(encodedValue!=null && encodedValue.contains("Basic ")){
			String encodedUserPassword = encodedValue.replaceFirst("Basic"	+ " ", "");
			String usernameAndPassword = null;
			byte[] decodedBytes = Base64.getDecoder().decode(encodedUserPassword);
			usernameAndPassword = new String(decodedBytes, "UTF-8");
			StringTokenizer tokenizer = new StringTokenizer(usernameAndPassword, ":");
			String username = tokenizer.nextToken();
			String password = tokenizer.nextToken();
			return new String[]{username, password};
		}else{
			return null;
		}
	}
}