/*******************************************************************************
 * 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.duplicatedcode.core;

import java.io.IOException;

import org.eclipse.core.runtime.CoreException;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.PlatformUI;
import org.erlide.runtime.rpc.RpcResult;
import org.erlide.wrangler.refactoring.backend.internal.WranglerBackendManager;
import org.erlide.wrangler.refactoring.backend.internal.WranglerRefactoringBackend;
import org.erlide.wrangler.refactoring.core.exception.WranglerWarningException;
import org.erlide.wrangler.refactoring.duplicatedcode.ui.SimilarSearchInputDialog;
import org.erlide.wrangler.refactoring.exception.WranglerRpcParsingException;
import org.erlide.wrangler.refactoring.selection.IErlMemberSelection;
import org.erlide.wrangler.refactoring.util.GlobalParameters;

import com.ericsson.otp.erlang.OtpErlangFloat;

/**
 * Parses the result of an rpc between Wrangler and erlide, which about finding
 * similar expressions.
 *
 * @author György Orosz
 *
 */
public class SimilarSearchAction extends AbstractDuplicatesSearcherAction {

    private float simScore;
    boolean onlyInFile = true;

    @Override
    protected IResultParser callRefactoring() throws WranglerRpcParsingException,
            CoreException, IOException, WranglerWarningException {

        final IErlMemberSelection sel = (IErlMemberSelection) GlobalParameters
                .getWranglerSelection();
        final WranglerRefactoringBackend backend = WranglerBackendManager
                .getRefactoringBackend();
        RpcResult result = null;
        String functionName;
        if (onlyInFile) {
            functionName = "simi_expr_search_in_buffer_eclipse";
        } else {
            functionName = "simi_expr_search_in_dirs_eclipse";
        }
        result = backend.callWithoutParser(WranglerRefactoringBackend.UNLIMITED_TIMEOUT,
                functionName, "sxxxxi", sel.getFilePath(),
                sel.getSelectionRange().getStartPos(),
                sel.getSelectionRange().getEndPos(), new OtpErlangFloat(simScore),
                sel.getSearchPath(), GlobalParameters.getTabWidth());

        if (result.isOk()) {
            return new SimilarExpressionSearchParser(result.getValue());
        }
        throw new WranglerRpcParsingException("RPC error");
    }

    @Override
    protected boolean getUserInput() {
        final Shell shell = PlatformUI.getWorkbench().getDisplay().getActiveShell();

        final SimilarSearchInputDialog inputd = new SimilarSearchInputDialog(shell,
                "Search for similar expressions...");
        inputd.open();
        simScore = (float) inputd.getSimScore();
        onlyInFile = inputd.onlyinFile();
        return inputd.isFinished();
    }
}