/*
 * 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.camel.component.cxf.feature;

import java.util.ArrayList;
import java.util.Collection;
import java.util.HashSet;
import java.util.List;
import java.util.Set;

import org.apache.cxf.endpoint.Client;
import org.apache.cxf.feature.AbstractFeature;
import org.apache.cxf.interceptor.ClientFaultConverter;
import org.apache.cxf.interceptor.Interceptor;
import org.apache.cxf.message.Message;
import org.apache.cxf.phase.PhaseInterceptor;
import org.slf4j.Logger;

/**
 * The abstract class for the data format feature
 */
public abstract class AbstractDataFormatFeature extends AbstractFeature {
    protected static final Collection<Class<?>> REMOVING_FAULT_IN_INTERCEPTORS;

    static {
        REMOVING_FAULT_IN_INTERCEPTORS = new ArrayList<>();
        REMOVING_FAULT_IN_INTERCEPTORS.add(ClientFaultConverter.class);
    }

    // The interceptors which need to be keeped
    protected Set<String> inInterceptorNames = new HashSet<>();
    protected Set<String> outInterceptorNames = new HashSet<>();

    protected abstract Logger getLogger();

    protected void removeInterceptorWhichIsOutThePhases(
            List<Interceptor<? extends Message>> interceptors, String[] phaseNames, Set<String> needToBeKept) {
        for (Interceptor<? extends Message> i : interceptors) {
            tryRemove(interceptors, phaseNames, needToBeKept, i);
        }
    }

    private void tryRemove(
            List<Interceptor<? extends Message>> interceptors, String[] phaseNames, Set<String> needToBeKept,
            Interceptor<? extends Message> i) {
        boolean outside = false;
        if (i instanceof PhaseInterceptor) {
            PhaseInterceptor<? extends Message> p = (PhaseInterceptor<? extends Message>) i;
            for (String phaseName : phaseNames) {
                if (p.getPhase().equals(phaseName)) {
                    outside = true;
                    break;
                }
            }
            if (!outside) {
                doRemove(interceptors, needToBeKept, p);
            }
        }
    }

    private void doRemove(
            List<Interceptor<? extends Message>> interceptors, Set<String> needToBeKept,
            PhaseInterceptor<? extends Message> p) {
        // To support the old API
        if (needToBeKept == null) {
            getLogger().info("removing the interceptor {}", p);
            interceptors.remove(p);
        } else if (!needToBeKept.contains(p.getClass().getName())) {
            getLogger().info("removing the interceptor {}", p);
            interceptors.remove(p);
        }
    }

    protected void removeInterceptors(
            List<Interceptor<? extends Message>> interceptors,
            Collection<Class<?>> toBeRemovedInterceptors) {
        for (Interceptor<? extends Message> interceptor : interceptors) {
            if (toBeRemovedInterceptors.contains(interceptor.getClass())) {
                getLogger().info("removing the interceptor {}", interceptor);
                interceptors.remove(interceptor);
            }
        }
    }

    protected void removeInterceptor(
            List<Interceptor<? extends Message>> interceptors,
            Class<? extends Interceptor<? extends Message>> cls) {
        for (Interceptor<? extends Message> interceptor : interceptors) {
            if (interceptor.getClass().equals(cls)) {
                interceptors.remove(interceptor);
            }
        }
    }

    protected void removeFaultInInterceptorFromClient(Client client) {
        removeInterceptors(client.getInFaultInterceptors(), REMOVING_FAULT_IN_INTERCEPTORS);
        removeInterceptors(client.getEndpoint().getService().getInFaultInterceptors(), REMOVING_FAULT_IN_INTERCEPTORS);
        removeInterceptors(client.getEndpoint().getInFaultInterceptors(), REMOVING_FAULT_IN_INTERCEPTORS);
        removeInterceptors(client.getEndpoint().getBinding().getInFaultInterceptors(), REMOVING_FAULT_IN_INTERCEPTORS);
    }

    public void addInIntercepters(List<Interceptor<? extends Message>> interceptors) {
        for (Interceptor<? extends Message> interceptor : interceptors) {
            inInterceptorNames.add(interceptor.getClass().getName());
        }
    }

    public void addOutInterceptors(List<Interceptor<? extends Message>> interceptors) {
        for (Interceptor<? extends Message> interceptor : interceptors) {
            outInterceptorNames.add(interceptor.getClass().getName());
        }
    }

    public Set<String> getInInterceptorNames() {
        return inInterceptorNames;
    }

    public Set<String> getOutInterceptorNames() {
        return outInterceptorNames;
    }
}
