/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.apache.jackrabbit.oak.run;

import java.util.Arrays;

import com.google.common.io.Closer;
import org.apache.jackrabbit.oak.plugins.document.DocumentNodeStore;
import org.apache.jackrabbit.oak.plugins.document.LastRevRecoveryAgent;
import org.apache.jackrabbit.oak.plugins.document.NodeDocument;
import org.apache.jackrabbit.oak.plugins.document.mongo.MongoDocumentStore;
import org.apache.jackrabbit.oak.plugins.document.mongo.MongoMissingLastRevSeeker;
import org.apache.jackrabbit.oak.plugins.document.util.CloseableIterable;
import org.apache.jackrabbit.oak.plugins.document.util.MapDBMapFactory;
import org.apache.jackrabbit.oak.plugins.document.util.MapFactory;
import org.apache.jackrabbit.oak.spi.state.NodeStore;

class RecoveryCommand implements Command {

    MapFactory oldf = MapFactory.getInstance();

    @Override
    public void execute(String... args) throws Exception {
        Closer closer = Closer.create();
        MapDBMapFactory mdbmf = new MapDBMapFactory();
        closer.register(mdbmf);
        String h = "recovery mongodb://host:port/database { dryRun }";
        try {
            NodeStore store = Utils.bootstrapNodeStore(args, closer, h);
            if (!(store instanceof DocumentNodeStore)) {
                System.err.println("Recovery only available for DocumentNodeStore");
                System.exit(1);
            }
            DocumentNodeStore dns = (DocumentNodeStore) store;
            if (!(dns.getDocumentStore() instanceof MongoDocumentStore)) {
                System.err.println("Recovery only available for MongoDocumentStore");
                System.exit(1);
            }
            MongoDocumentStore docStore = (MongoDocumentStore) dns.getDocumentStore();
            LastRevRecoveryAgent agent = new LastRevRecoveryAgent(dns);
            MongoMissingLastRevSeeker seeker = new MongoMissingLastRevSeeker(
                    docStore, dns.getClock());
            CloseableIterable<NodeDocument> docs = seeker.getCandidates(0);
            closer.register(docs);
            boolean dryRun = Arrays.asList(args).contains("dryRun");
            agent.recover(docs.iterator(), dns.getClusterId(), dryRun);
        } catch (Throwable e) {
            throw closer.rethrow(e);
        } finally {
            closer.close();
            MapFactory.setInstance(oldf);
        }
    }

}
