/**
    * This file Copyright (c) 2013 Magnolia International
    * Ltd.  (http://www.magnolia-cms.com). All rights reserved.
    *
    *
    * This file is dual-licensed under both the Magnolia
    * Network Agreement and the GNU General Public License.
    * You may elect to use one or the other of these licenses.
    *
   * This file is distributed in the hope that it will be
   * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
   * implied warranty of MERCHANTABILITY or FITNESS FOR A
   * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
   * Redistribution, except as permitted by whichever of the GPL
   * or MNA you select, is prohibited.
   *
   * 1. For the GPL license (GPL), you can redistribute and/or
   * modify this file under the terms of the GNU General
   * Public License, Version 3, as published by the Free Software
   * Foundation.  You should have received a copy of the GNU
   * General Public License, Version 3 along with this program;
   * if not, write to the Free Software Foundation, Inc., 51
   * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
   *
   * 2. For the Magnolia Network Agreement (MNA), this file
   * and the accompanying materials are made available under the
   * terms of the MNA which accompanies this distribution, and
   * is available at http://www.magnolia-cms.com/mna.html
   *
   * Any modifications to this file must keep this entire header
   * intact.
   *
   */
  package info.magnolia.module.groovy.app.action;
  
  import info.magnolia.cms.core.Path;
  import info.magnolia.jcr.util.NodeUtil;
  import info.magnolia.module.groovy.support.HierarchyManagerProvider.UserContextHierarchyManagerProvider;
  import info.magnolia.module.groovy.support.classes.MgnlGroovyClassLoader;
  import info.magnolia.ui.api.action.ActionExecutionException;
  import info.magnolia.ui.form.EditorCallback;
  import info.magnolia.ui.form.EditorValidator;
  import info.magnolia.ui.form.action.SaveFormAction;
  import info.magnolia.ui.form.action.SaveFormActionDefinition;
  import info.magnolia.ui.vaadin.integration.jcr.AbstractJcrNodeAdapter;
  import info.magnolia.ui.vaadin.integration.jcr.JcrNodeAdapter;
  
  import java.util.List;
  
  import javax.jcr.Node;
  import javax.jcr.RepositoryException;
  
  import org.codehaus.groovy.ast.ASTNode;
  import org.codehaus.groovy.ast.ClassNode;
  import org.codehaus.groovy.ast.builder.AstBuilder;
  import org.codehaus.groovy.control.CompilationFailedException;
  import org.codehaus.groovy.control.CompilePhase;
  
  import com.vaadin.data.Item;
  
  /**
   * SaveScriptAction.
   */
  public class SaveScriptAction extends SaveFormAction {
      private final static MgnlGroovyClassLoader CL_TO_VERIFY_SOURCE = new MgnlGroovyClassLoader(new UserContextHierarchyManagerProvider());
  
      public SaveScriptAction(SaveFormActionDefinition definition, Item item, EditorCallback callback, EditorValidator validator) {
          super(definition, (JcrNodeAdapter) item, callback, validator);
      }
  
      @Override
      public void execute() throws ActionExecutionException {
          validator.showValidation(true);
          if (validator.isValid()) {
              try {
                  final Node node = item.applyChanges();
                  if (node.isNew()) {
                      setNodeName(node, item);
                  }
                  verifySource(node, item, CL_TO_VERIFY_SOURCE);
                  node.getSession().save();
              } catch (RepositoryException e) {
                  throw new ActionExecutionException(e);
              } catch (CompilationFailedException e) {
                  throw new ActionExecutionException(e.getCause() != null ? e.getCause().getMessage() : e.getMessage());
              }
          }
          callback.onSuccess(getDefinition().getName());
  
      }
  
      @Override
      protected void setNodeName(Node node, JcrNodeAdapter item) throws RepositoryException {
          final String source = (String) item.getItemProperty("text").getValue();
          String newNodeName = resolveNewGroovyFullyQualifiedClassName(source, item);
          if (!node.getName().equals(newNodeName)) {
              newNodeName = Path.getUniqueLabel(node.getSession(), node.getParent().getPath(), Path.getValidatedLabel(newNodeName));
              item.setNodeName(newNodeName);
              NodeUtil.renameNode(node, newNodeName);
         }
     }
 
     protected void verifySource(Node node, JcrNodeAdapter item, MgnlGroovyClassLoader groovyClassLoader) throws RepositoryException, CompilationFailedException {
         final com.vaadin.data.Property<Boolean> scriptProperty = item.getItemProperty("script");
         final boolean isScript = scriptProperty != null && scriptProperty.getValue() != null ? scriptProperty.getValue() : false;
         final String source = (String) item.getItemProperty("text").getValue();
 
         if (isScript) {
             groovyClassLoader.verify(source, false, null);
         } else {
             String path = node.getPath();
             if (node.isNew()) {
                 AbstractJcrNodeAdapter parent = item.getParent();
                 String parentPath = parent != null ? parent.getJcrItem().getPath() + "/" : "/";
                 path = parentPath + resolveNewGroovyFullyQualifiedClassName(source, item);
                 item.setNodeName(path);
                 setNodeName(node, item);
             }
             groovyClassLoader.verify(source, true, path);
         }
     }
 
     private String resolveNewGroovyFullyQualifiedClassName(String source, JcrNodeAdapter item) throws RepositoryException {
         final List<ASTNode> nodes = new AstBuilder().buildFromString(CompilePhase.CONVERSION, source);
         for (ASTNode astNode : nodes) {
             if (astNode instanceof ClassNode) {
                 ClassNode cn = (ClassNode) astNode;
                 String name = cn.getNameWithoutPackage();
                 if (!name.startsWith("script")) {
                     return name;
                 }
             }
         }
         return "untitledGroovyScript";
     }
 
 }