/*
 * 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.myfaces.extensions.scripting.core;

import org.apache.myfaces.extensions.scripting.api.ScriptingConst;
import org.apache.myfaces.extensions.scripting.api.ScriptingWeaver;
import org.apache.myfaces.extensions.scripting.core.util.WeavingContext;

import java.io.Serializable;
import java.util.*;

/**
 * @author werpu
 *         <p/>
 *         Facade which holds multiple weavers
 *         and implements a chain of responsibility pattern
 *         on them
 */
public class CoreWeaver implements Serializable, ScriptingWeaver {

    /**
     *
     */
    private static final long serialVersionUID = -3034995032644947216L;

    List<ScriptingWeaver> _weavers = new ArrayList<ScriptingWeaver>();

    public CoreWeaver(Collection<ScriptingWeaver> weavers) {
        _weavers.addAll(weavers);
    }

    public CoreWeaver(ScriptingWeaver... weavers) {
        _weavers.addAll(Arrays.asList(weavers));
    }

    public void appendCustomScriptPath(String scriptPaths) {
        throw new RuntimeException("Method not supported from this facade");
    }

    public Object reloadScriptingInstance(Object o, int artefactType) {

        for (ScriptingWeaver weaver : _weavers) {
            if (weaver.isDynamic(o.getClass())) {
                return weaver.reloadScriptingInstance(o, artefactType);
            }
        }
        return o;

    }

    public Class reloadScriptingClass(Class aclass) {

        for (ScriptingWeaver weaver : _weavers) {
            if (weaver.isDynamic(aclass)) {
                return weaver.reloadScriptingClass(aclass);
            }
        }
        return aclass;

    }

    public void markAsFullyRecompiled() {
        for (ScriptingWeaver weaver : _weavers) {
            weaver.markAsFullyRecompiled();
        }
    }

    public Class loadScriptingClassFromName(String className) {
        for (ScriptingWeaver weaver : _weavers) {
            Class retVal = weaver.loadScriptingClassFromName(className);
            if (retVal != null) {
                return retVal;
            }
        }
        return null;
    }

    public int getScriptingEngine() {
        return ScriptingConst.ENGINE_TYPE_JSF_ALL;
    }

    public boolean isDynamic(Class clazz) {
        for (ScriptingWeaver weaver : _weavers) {
            if (weaver.isDynamic(clazz)) {
                return true;
            }
        }
        return false;
    }

    public ScriptingWeaver getWeaverInstance(Class weaverClass) {
        for (ScriptingWeaver weaver : _weavers) {
            ScriptingWeaver retVal = weaver.getWeaverInstance(weaverClass);
            if (retVal != null) {
                return retVal;
            }
        }
        return null;
    }

    public void fullClassScan() {
        for (ScriptingWeaver weaver : _weavers) {
            weaver.fullClassScan();
        }
    }

    /**
     * @deprecated the full recompile now is done at the beginning of a request
     */
    public void fullRecompile() {
        for (ScriptingWeaver weaver : _weavers) {
            weaver.fullRecompile();
        }
    }

    public void postStartupActions() {
        for (ScriptingWeaver weaver : _weavers) {
            weaver.postStartupActions();
        }
    }

    public void requestRefresh() {
        for (ScriptingWeaver weaver : _weavers) {
            weaver.requestRefresh();
        }
    }

    @Override
    public void jsfRequestRefresh() {
        for (ScriptingWeaver weaver : _weavers) {
            weaver.jsfRequestRefresh();
        }
    }

    public Collection<String> loadPossibleDynamicClasses() {
        LinkedList<String> retVal = new LinkedList<String>();
        for (ScriptingWeaver weaver : _weavers) {
            retVal.addAll(weaver.loadPossibleDynamicClasses());
        }
        return retVal;
    }

    public void scanForAddedClasses() {
        for (ScriptingWeaver weaver : _weavers) {
            weaver.scanForAddedClasses();
        }
    }
}