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/*
 * Copyright 2017 floragunn GmbH
 * 
 * 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.
 * 
 */

package com.floragunn.searchguard.ssl.util;

import org.elasticsearch.ElasticsearchException;

public class ExceptionUtils {
    
    public static Throwable getRootCause(final Throwable e) {
        
        if(e == null) {
            return null;
        }
        
        final Throwable cause = e.getCause();
        if(cause == null) {
            return e;
        }
        return getRootCause(cause);
    }
    
    public static Throwable findMsg(final Throwable e, String msg) {
        
        if(e == null) {
            return null;
        }
        
        if(e.getMessage() != null && e.getMessage().contains(msg)) {
            return e;
        }
        
        final Throwable cause = e.getCause();
        if(cause == null) {
            return null;
        }
        return findMsg(cause, msg);
    }

    public static ElasticsearchException createBadHeaderException() {
        return new ElasticsearchException("Illegal parameter in http or transport request found."+System.lineSeparator()
                + "This means that one node is trying to connect to another with "+System.lineSeparator()
                + "a non-node certificate (no OID or searchguard.nodes_dn incorrect configured) or that someone "+System.lineSeparator()
                + "is spoofing requests. Check your TLS certificate setup as described here: "
                + "See http://docs.search-guard.com/latest/troubleshooting-tls");
    }
}