/**
 * ====================================================================
 * Nuts : Network Updatable Things Service
 * (universal package manager)
 * <br>
 * is a new Open Source Package Manager to help install packages
 * and libraries for runtime execution. Nuts is the ultimate companion for
 * maven (and other build managers) as it helps installing all package
 * dependencies at runtime. Nuts is not tied to java and is a good choice
 * to share shell scripts and other 'things' . Its based on an extensible
 * architecture to help supporting a large range of sub managers / repositories.
 *
 * <br>
 * <p>
 * Copyright [2020] [thevpc]
 * Licensed 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.
 * <br>
 * ====================================================================
 */
package net.thevpc.nuts.toolbox.nsh.cmds.core;

import net.thevpc.nuts.*;
import net.thevpc.nuts.cmdline.NArg;
import net.thevpc.nuts.cmdline.NCmdLine;
import net.thevpc.nuts.spi.NComponentScope;
import net.thevpc.nuts.spi.NScopeType;
import net.thevpc.nuts.toolbox.nsh.cmds.NShellBuiltinCore;
import net.thevpc.nuts.toolbox.nsh.eval.NShellExecutionContext;
import net.thevpc.nuts.toolbox.nsh.err.NShellQuitException;

/**
 * Created by vpc on 1/7/17.
 */
@NComponentScope(NScopeType.WORKSPACE)
public class ExitCommand extends NShellBuiltinCore {

    public ExitCommand() {
        super("exit", NConstants.Support.DEFAULT_SUPPORT, Options.class);
    }

    @Override
    protected boolean onCmdNextOption(NArg arg, NCmdLine cmdLine, NShellExecutionContext context) {
        return false;
    }

    @Override
    protected boolean onCmdNextNonOption(NArg arg, NCmdLine cmdLine, NShellExecutionContext context) {
        Options options = context.getOptions();
        NSession session = context.getSession();
        if (arg.isInt() && arg.asInt().get(session) > 0) {
            arg = cmdLine.next().get();
            options.code = arg.asInt().get(session);
            return true;
        }
        return false;
    }

    @Override
    protected void onCmdExec(NCmdLine cmdLine, NShellExecutionContext context) {
        Options options = context.getOptions();
        throw new NShellQuitException(context.getSession(), options.code);
    }

    private static class Options {

        int code;
    }

}
