/*******************************************************************************
 * 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 java.util.ArrayList;

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.eclipse.swt.widgets.Shell;
import org.erlide.wrangler.refactoring.backend.IRefactoringRpcMessage;
import org.erlide.wrangler.refactoring.backend.internal.ExpressionPosRpcMessage;
import org.erlide.wrangler.refactoring.backend.internal.WranglerBackendManager;
import org.erlide.wrangler.refactoring.core.CostumWorkflowRefactoringWithPositionsSelection;
import org.erlide.wrangler.refactoring.core.RefactoringWorkflowController;
import org.erlide.wrangler.refactoring.selection.IErlMemberSelection;
import org.erlide.wrangler.refactoring.selection.IErlSelection;
import org.erlide.wrangler.refactoring.util.GlobalParameters;

import com.ericsson.otp.erlang.OtpErlangObject;

/**
 * Fold against macro refactoring integration
 *
 * @author Gyorgy Orosz
 * @version %I%, %G%
 */
public class FoldAgainstMacro extends CostumWorkflowRefactoringWithPositionsSelection {
    protected OtpErlangObject syntaxTree;

    @Override
    public RefactoringWorkflowController getWorkflowController(final Shell shell) {
        return new RefactoringWorkflowController(shell) {
            @Override
            public void doRefactoring() {
            }
        };
    }

    @Override
    public IRefactoringRpcMessage runAlternative(final IErlSelection selection) {
        return null;
    }

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

        /*
         * if (!((selection instanceof IErlMemberSelection) && (selection
         * .getKind() == SelectionKind.FUNCTION || selection.getKind() ==
         * SelectionKind.FUNCTION_CLAUSE))) return RefactoringStatus
         * .createFatalErrorStatus("Please select an expression!");
         */

        final IErlMemberSelection sel = (IErlMemberSelection) selection;
        ExpressionPosRpcMessage m = new ExpressionPosRpcMessage();
        m = (ExpressionPosRpcMessage) WranglerBackendManager.getRefactoringBackend()
                .callWithParser(m, "fold_against_macro_eclipse", "siixi",
                        sel.getFilePath(), sel.getMemberRange().getStartLine(),
                        sel.getMemberRange().getStartCol(), sel.getSearchPath(),
                        GlobalParameters.getTabWidth());
        if (m.isSuccessful()) {
            syntaxTree = m.getSyntaxTree();
            positions = m.getPositionDefinitions(sel.getDocument());
            selectedPositions = new ArrayList<>();
        } else {
            return RefactoringStatus.createFatalErrorStatus(m.getMessageString());
        }
        return new RefactoringStatus();
    }

    @Override
    public String getName() {
        return "Fold against macri definition";
    }

    @Override
    public IRefactoringRpcMessage run(final IErlSelection selection) {
        final IErlMemberSelection sel = (IErlMemberSelection) selection;
        return WranglerBackendManager.getRefactoringBackend().call(
                "fold_against_macro_1_eclipse", "sxxxi", sel.getFilePath(),
                getSelectedPos(), syntaxTree, sel.getSearchPath(),
                GlobalParameters.getTabWidth());
    }

    @Override
    public RefactoringStatus checkFinalConditions(final IProgressMonitor pm)
            throws CoreException, OperationCanceledException {
        final IErlSelection sel = GlobalParameters.getWranglerSelection();
        final IRefactoringRpcMessage message = run(sel);
        if (message.isSuccessful()) {
            changedFiles = message.getRefactoringChangeset();
            return new RefactoringStatus();
        }
        return RefactoringStatus.createFatalErrorStatus(message.getMessageString());
    }

}