/*******************************************************************************
 * Copyright (c) 2010 György Orosz.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     György Orosz - initial API and implementation
 ******************************************************************************/
package org.erlide.wrangler.refactoring.core.internal;

import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.OperationCanceledException;
import org.eclipse.ltk.core.refactoring.RefactoringStatus;
import org.erlide.wrangler.refactoring.backend.IRefactoringRpcMessage;
import org.erlide.wrangler.refactoring.backend.internal.ProcessRpcMessage;
import org.erlide.wrangler.refactoring.core.SimpleWranglerRefactoring;
import org.erlide.wrangler.refactoring.selection.IErlMemberSelection;
import org.erlide.wrangler.refactoring.selection.IErlSelection;
import org.erlide.wrangler.refactoring.util.GlobalParameters;

/**
 * Process related refactoring integration class
 *
 * @author Gyorgy Orosz
 * @version %I%, %G%
 */
public abstract class ProcessRelatedRefactoring extends SimpleWranglerRefactoring {

    protected String undecidables;

    @Override
    public RefactoringStatus checkFinalConditions(final IProgressMonitor pm)
            throws CoreException, OperationCanceledException {
        final IErlSelection sel = GlobalParameters.getWranglerSelection();

        final ProcessRpcMessage msg = checkUndecidables((IErlMemberSelection) sel);

        if (msg.isSuccessful()) {
            changedFiles = msg.getRefactoringChangeset();
            return new RefactoringStatus();
        } else if (msg.hasUndecidables()) {
            undecidables = msg.getMessageString();
            final IRefactoringRpcMessage message = run(sel);
            changedFiles = message.getRefactoringChangeset();

            return RefactoringStatus.createWarningStatus(getUndecidableWarningMessage());
        } else {
            return RefactoringStatus.createFatalErrorStatus(msg.getMessageString());

        }
    }

    protected abstract String getUndecidableWarningMessage();

    /**
     * @noreference This method is not intended to be referenced by clients.
     */
    protected abstract ProcessRpcMessage checkUndecidables(IErlMemberSelection sel);
}