/*
 * 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.loaders.groovy;

import org.apache.myfaces.extensions.scripting.groovyloader.core.StandardGroovyReloadingStrategy;
import org.apache.myfaces.extensions.scripting.api.*;
import org.apache.myfaces.extensions.scripting.core.util.Cast;
import org.apache.myfaces.extensions.scripting.core.util.ClassUtils;
import org.apache.myfaces.extensions.scripting.core.util.ReflectUtil;
import org.apache.myfaces.extensions.scripting.loaders.groovy.compiler.GroovyCompilerFacade;

import javax.servlet.ServletContext;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 * A standard groovy weaver which isolates the weaving behavior
 */
public class GroovyScriptingWeaver extends BaseWeaver {

    org.apache.myfaces.extensions.scripting.loaders.groovy.DynamicClassIdentifier _identifier = new org.apache.myfaces.extensions.scripting.loaders.groovy.DynamicClassIdentifier();

    final Logger _logger = Logger.getLogger(GroovyScriptingWeaver.class.getName());

    /**
     * helper to allow initial compiler classpath scanning
     *
     * @param servletContext servlet context to be passed down
     */
    @SuppressWarnings("unused")
    public GroovyScriptingWeaver(ServletContext servletContext) {
        super(ScriptingConst.GROOVY_FILE_ENDING, ScriptingConst.ENGINE_TYPE_JSF_GROOVY);
        init();

    }

    public GroovyScriptingWeaver() {
        super(ScriptingConst.FILE_EXTENSION_GROOVY, ScriptingConst.ENGINE_TYPE_JSF_GROOVY);
        init();
    }

    private void init() {
        //init classpath removed we can resolve that over the
        //url classloader at the time myfaces is initialized
        try {
            Class scanner = ClassUtils.getContextClassLoader().loadClass("org.apache.myfaces.extensions.scripting.jsf2.annotation.GenericAnnotationScanner");
            this._annotationScanner = (ClassScanner) ReflectUtil.instantiate(scanner, new Cast(ScriptingWeaver.class, this));

        } catch (ClassNotFoundException e) {
            //we do nothing here
            //generic annotation scanner can be missing in jsf1 environments
            _logger.log(Level.FINER, "", e);
        }

        this._dependencyScanner = new GroovyDependencyScanner(this);
        this._reloadingStrategy = new StandardGroovyReloadingStrategy();
        this._reloadingStrategy.setWeaver(this);
    }

    protected String getLoadingInfo(String file) {
        return "[EXT-SCRIPTING] Loading Groovy file:" + file;
    }

    public boolean isDynamic(Class clazz) {
        return _identifier.isDynamic(clazz);
    }

    protected DynamicCompiler instantiateCompiler() {
        return new GroovyCompilerFacade();
    }

    /**
     * checks outside of the request scope for changes and taints the corresponding engine
     */
    public void scanForAddedClasses() {
        _dependencyScanner.scanAndMarkChange();
    }

}