/*
 * 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.netbeans.modules.j2ee.jpa.verification.fixes;

import com.sun.source.tree.ClassTree;
import com.sun.source.tree.ModifiersTree;
import java.io.IOException;
import java.util.HashSet;
import java.util.Set;
import java.util.logging.Level;
import javax.lang.model.element.Modifier;
import javax.lang.model.element.TypeElement;
import org.netbeans.api.java.source.CancellableTask;
import org.netbeans.api.java.source.ElementHandle;
import org.netbeans.api.java.source.JavaSource;
import org.netbeans.api.java.source.TreeMaker;
import org.netbeans.api.java.source.WorkingCopy;
import org.netbeans.modules.j2ee.jpa.verification.JPAProblemFinder;
import org.netbeans.modules.j2ee.jpa.verification.common.Utilities;
import org.netbeans.spi.editor.hints.ChangeInfo;
import org.netbeans.spi.editor.hints.Fix;
import org.openide.filesystems.FileObject;
import org.openide.util.NbBundle;

/**
 * @author Tomasz.Slota@Sun.COM
 */
public class MakeClassPublic implements Fix {
        private FileObject fileObject;
    private ElementHandle<TypeElement> classHandle;
    
    /** Creates a new instance of ImplementSerializable */
    public MakeClassPublic(FileObject fileObject, ElementHandle<TypeElement> classHandle) {
        this.classHandle = classHandle;
        this.fileObject = fileObject;
    }
    
    public ChangeInfo implement(){
        CancellableTask<WorkingCopy> task = new CancellableTask<WorkingCopy>(){
            public void cancel() {}
            
            public void run(WorkingCopy workingCopy) throws Exception {
                workingCopy.toPhase(JavaSource.Phase.RESOLVED);
                TypeElement clazz = classHandle.resolve(workingCopy);
                
                if (clazz != null){    
                    ClassTree clazzTree = workingCopy.getTrees().getTree(clazz);
                    TreeMaker make = workingCopy.getTreeMaker();
                    
                    Set<Modifier> flags = new HashSet<Modifier>(clazzTree.getModifiers().getFlags());
                    flags.add(Modifier.PUBLIC);
                    ModifiersTree newModifiers = make.Modifiers(flags, clazzTree.getModifiers().getAnnotations());
                    workingCopy.rewrite(clazzTree.getModifiers(), newModifiers);
                }
            }
        };
        
        JavaSource javaSource = JavaSource.forFileObject(fileObject);
        
        try{
            javaSource.runModificationTask(task).commit();
        } catch (IOException e){
            JPAProblemFinder.LOG.log(Level.SEVERE, e.getMessage(), e);
        }
        return null;
    }
    
    public int hashCode(){
        return 1;
    }
    
    public boolean equals(Object o){
        // TODO: implement equals properly
        return super.equals(o);
    }
    
    public String getText(){
        return NbBundle.getMessage(CreatePersistenceUnit.class, "LBL_MakeClassPublic", 
                Utilities.getShortClassName(classHandle.getQualifiedName()));
    }
}
