/**
 * ============LICENSE_START=======================================================
 * org.onap.aai
 * ================================================================================
 * Copyright © 2017 AT&T Intellectual Property. All rights reserved.
 * ================================================================================
 * 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.
 * ============LICENSE_END=========================================================
 *
 * ECOMP is a trademark and service mark of AT&T Intellectual Property.
 */

package org.onap.aai.dbmap;

import com.att.eelf.configuration.EELFLogger;
import com.att.eelf.configuration.EELFManager;
import com.google.common.base.Preconditions;
import com.google.common.base.Predicate;
import com.google.common.collect.Iterators;
import com.thinkaurelius.titan.diskstorage.configuration.ConfigElement;
import com.thinkaurelius.titan.diskstorage.configuration.backend.CommonsConfiguration;
import org.apache.commons.configuration.ConfigurationException;
import org.apache.commons.configuration.PropertiesConfiguration;
import org.apache.commons.lang.StringUtils;

import java.io.File;
import java.io.FileNotFoundException;
import java.lang.management.ManagementFactory;
import java.util.Iterator;
import java.util.Objects;
import java.util.regex.Pattern;

import static com.thinkaurelius.titan.graphdb.configuration.GraphDatabaseConfiguration.*;

/**
 * For building a config that TitanFactory.open can use with an identifiable graph.unique-instance-id
 */
public class AAIGraphConfig {

	private static final EELFLogger logger = EELFManager.getInstance().getLogger(AAIGraphConfig.class);

	private AAIGraphConfig(){};

	public PropertiesConfiguration getCc(String configPath, String graphType, String service) throws ConfigurationException, FileNotFoundException {

		PropertiesConfiguration cc = this.loadTitanPropFile(configPath);

		String uid = ManagementFactory.getRuntimeMXBean().getName() + "_" + service  + "_" + graphType + "_" + System.currentTimeMillis();
		for (char c : ConfigElement.ILLEGAL_CHARS) {
			uid = StringUtils.replaceChars(uid, c,'_');
		}

		cc.addProperty("graph.unique-instance-id", uid);

		return cc;
	}


	private PropertiesConfiguration loadTitanPropFile(String shortcutOrFile) throws ConfigurationException, FileNotFoundException {
		File file = new File(shortcutOrFile);
		if (file.exists()) {
			PropertiesConfiguration propertiesConfiguration = new PropertiesConfiguration();
			propertiesConfiguration.setAutoSave(false);
			propertiesConfiguration.load(shortcutOrFile);
			return propertiesConfiguration;
		} else {
			throw new FileNotFoundException(shortcutOrFile);
		}
	}

	public static class Builder {
		private String configPath;
		private String graphType;
		private String service;

		public Builder(String configPath) {
			this.configPath = configPath;
		}

		public Builder withGraphType(String graphType) {
			this.graphType = Objects.toString(graphType, "NA");
			return this;
		}

		public Builder forService(String service) {
			this.service = Objects.toString(service, "NA");
			return this;
		}

		public PropertiesConfiguration buildConfiguration() throws ConfigurationException, FileNotFoundException {
			return new AAIGraphConfig().getCc(this.configPath, this.graphType, this.service);
		}

	}


}