/*
 * Copyright 2017-present Open Networking Foundation
 *
 * 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.
 */

package org.onosproject.imr.cli;

import org.apache.karaf.shell.console.Completer;
import org.apache.karaf.shell.console.completer.StringsCompleter;
import org.onosproject.cli.AbstractShellCommand;
import org.onosproject.net.intent.IntentService;
import org.onosproject.net.intent.LinkCollectionIntent;
import org.onosproject.net.intent.PointToPointIntent;

import java.util.List;
import java.util.SortedSet;


/**
 * Intent Key completer for IMR cli command.
 */
public class IntentKeyImrCompleter implements Completer {

    @Override
    public int complete(String buffer, int cursor, List<String> candidates) {
        // Delegate string completer
        StringsCompleter delegate = new StringsCompleter();

        // Fetch our service and feed it's offerings to the string completer
        IntentService service = AbstractShellCommand.get(IntentService.class);
        SortedSet<String> strings = delegate.getStrings();
        service.getIntents().forEach(intent -> {
            if (intent instanceof LinkCollectionIntent
                    || intent instanceof PointToPointIntent) {
                strings.add(intent.key().toString());
            }
        });

        // Now let the completer do the work for figuring out what to offer.
        return delegate.complete(buffer, cursor, candidates);
    }

}