/*
 * 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 org.apache.tomee.security.cdi;

import javax.annotation.PostConstruct;
import javax.enterprise.context.ApplicationScoped;
import javax.enterprise.inject.Typed;
import javax.security.enterprise.AuthenticationException;
import javax.security.enterprise.AuthenticationStatus;
import javax.security.enterprise.authentication.mechanism.http.HttpAuthenticationMechanism;
import javax.security.enterprise.authentication.mechanism.http.HttpMessageContext;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@ApplicationScoped
@Typed(DefaultAuthenticationMechanism.class) // make sure it does not qualify with HttpAuthenticationMechanism so application can have its own
public class DefaultAuthenticationMechanism implements HttpAuthenticationMechanism {
    private HttpAuthenticationMechanism delegate;

    @PostConstruct
    private void init() {
        delegate = new EmptyAuthenticationMechanism();
    }

    @Override
    public AuthenticationStatus validateRequest(final HttpServletRequest request, final HttpServletResponse response,
                                                final HttpMessageContext httpMessageContext)
            throws AuthenticationException {
        return delegate.validateRequest(request, response, httpMessageContext);
    }

    @Override
    public AuthenticationStatus secureResponse(final HttpServletRequest request, final HttpServletResponse response,
                                               final HttpMessageContext httpMessageContext)
            throws AuthenticationException {
        return delegate.secureResponse(request, response, httpMessageContext);
    }

    @Override
    public void cleanSubject(final HttpServletRequest request, final HttpServletResponse response,
                             final HttpMessageContext httpMessageContext) {
        delegate.cleanSubject(request, response, httpMessageContext);
    }

    void setDelegate(final HttpAuthenticationMechanism delegate) {
        this.delegate = delegate;
    }

    private static class EmptyAuthenticationMechanism implements HttpAuthenticationMechanism {
        @Override
        public AuthenticationStatus validateRequest(final HttpServletRequest request,
                                                    final HttpServletResponse response,
                                                    final HttpMessageContext httpMessageContext)
                throws AuthenticationException {
            return httpMessageContext.doNothing();
        }
    }
}
