/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 io.milton.http.http11.auth;

import io.milton.http.Auth;
import io.milton.http.Auth.Scheme;
import io.milton.http.AuthenticationHandler;
import io.milton.http.Request;
import io.milton.resource.Resource;
import io.milton.http.SecurityManager;
import java.util.List;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 *
 * @author brad
 */
public class SecurityManagerBasicAuthHandler implements AuthenticationHandler {

    private static final Logger log = LoggerFactory.getLogger(SecurityManagerBasicAuthHandler.class);
    private final io.milton.http.SecurityManager securityManager;

    public SecurityManagerBasicAuthHandler(SecurityManager securityManager) {
        this.securityManager = securityManager;
    }

	@Override
	public boolean credentialsPresent(Request request) {
		return request.getAuthorization() != null;
	}	
	
	@Override
    public boolean supports(Resource r, Request request) {
        Auth auth = request.getAuthorization();
        if (auth == null) {
            return false;
        }

        if (log.isTraceEnabled()) {
            log.trace("supports basic? requested scheme: " + auth.getScheme());
        }
        return auth.getScheme().equals(Scheme.BASIC);
    }

	@Override
    public Object authenticate(Resource resource, Request request) {
        log.debug("authenticate");
        Auth auth = request.getAuthorization();
        Object o = securityManager.authenticate(auth.getUser(), auth.getPassword());
        log.debug("result: " + o);
        return o;
    }

	@Override
    public void appendChallenges( Resource resource, Request request, List<String> challenges ) {
        String realm = securityManager.getRealm(request.getHostHeader());
        challenges.add( "Basic realm=\"" + realm + "\"");
    }

	@Override
    public boolean isCompatible(Resource resource, Request request) {
        return true;
    }

    public SecurityManager getSecurityManager() {
        return securityManager;
    }
}