/**
 * ============LICENSE_START=======================================================
 * org.onap.aai
 * ================================================================================
 * Copyright © 2017-2018 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=========================================================
 */
package org.onap.aai.parsers.uri;

import com.att.eelf.configuration.EELFLogger;
import com.att.eelf.configuration.EELFManager;
import org.onap.aai.exceptions.AAIException;
import org.onap.aai.introspection.Introspector;
import org.onap.aai.introspection.Loader;
import org.onap.aai.introspection.Version;
import org.onap.aai.schema.enums.ObjectMetadata;
import org.onap.aai.serialization.db.EdgeType;

import javax.ws.rs.core.MultivaluedMap;
import java.io.UnsupportedEncodingException;
import java.net.URI;
import java.util.HashMap;
import java.util.List;

/**
 * Given a URI this class returns an object, or series of nested objects
 * with their keys populated based off the values in the URI.
 * 
 * It populates the keys in the order they are listed in the model.
 * 
 
 *
 */
public class URIToObject implements Parsable {
	private static final EELFLogger LOGGER = EELFManager.getInstance().getLogger(URIToObject.class);
	
	private Introspector topEntity = null;
	
	private String topEntityName = null;
	
	private String entityName = null;
	
	private Introspector entity = null;
	
	private Introspector previous = null;
	
	private List<Object> parentList = null;
	
	private Version version = null;
	private Loader loader = null;
	private final HashMap<String, Introspector> relatedObjects;
	
	/**
	 * Instantiates a new URI to object.
	 *
	 * @param loader the loader
	 * @param uri the uri
	 * @throws IllegalArgumentException the illegal argument exception
	 * @throws AAIException the AAI exception
	 * @throws UnsupportedEncodingException the unsupported encoding exception
	 */
	public URIToObject(Loader loader, URI uri) throws AAIException, UnsupportedEncodingException {
		
		URIParser parser = new URIParser(loader, uri);
		this.relatedObjects = new HashMap<>();
		
		parser.parse(this);
		this.loader = parser.getLoader();
		this.version = loader.getVersion();
	}
	public URIToObject(Loader loader, URI uri, HashMap<String, Introspector> relatedObjects) throws AAIException, UnsupportedEncodingException {
		
		URIParser parser = new URIParser(loader, uri);
		this.relatedObjects = relatedObjects;

		parser.parse(this);
		this.loader = parser.getLoader();
		this.version = loader.getVersion();

	}
	
	/**
	 * @{inheritDoc}
	 */
	@Override
	public void processNamespace(Introspector obj) {
	
	}
	
	/**
	 * @{inheritDoc}
	 */
	@Override
	public String getCloudRegionTransform() {
		return "add";
	}
	
	/**
	 * @{inheritDoc}
	 */
	@Override
	public boolean useOriginalLoader() {
		// TODO Auto-generated method stub
		return false;
	}

	/**
	 * Gets the top entity.
	 *
	 * @return the top entity
	 */
	public Introspector getTopEntity() {
		return this.topEntity;
	}
	
	/**
	 * Gets the entity.
	 *
	 * @return the entity
	 */
	public Introspector getEntity() {
		return this.entity;
	}
	
	/**
	 * Gets the parent list.
	 *
	 * @return the parent list
	 */
	public List<Object> getParentList() {
		return this.parentList;
	}
	
	/**
	 * Gets the entity name.
	 *
	 * @return the entity name
	 */
	public String getEntityName() {
		return this.entityName;
	}
	
	/**
	 * Gets the top entity name.
	 *
	 * @return the top entity name
	 */
	public String getTopEntityName() {
		return this.topEntityName;
	}
	
	/**
	 * Gets the object version.
	 *
	 * @return the object version
	 */
	public Version getObjectVersion() {
		return this.loader.getVersion();
	}
	public Loader getLoader() {
		return this.loader;
	}
	@Override
	public void processObject(Introspector obj, EdgeType type, MultivaluedMap<String, String> uriKeys)
			throws AAIException {

		if (this.entityName == null) {
			this.topEntityName = obj.getDbName();
			this.topEntity = obj;
		}
		this.entityName = obj.getDbName();
		this.entity = obj;
		this.parentList = (List<Object>)this.previous.getValue(obj.getName());
		this.parentList.add(entity.getUnderlyingObject());
		
		for (String key : uriKeys.keySet()) {
			entity.setValue(key, uriKeys.getFirst(key));
		}
		try {
			if (relatedObjects.containsKey(entity.getObjectId())) {
				Introspector relatedObject = relatedObjects.get(entity.getObjectId());
				String nameProp = relatedObject.getMetadata(ObjectMetadata.NAME_PROPS);
				if (nameProp == null) {
					nameProp = "";
				}
				if (nameProp != null && !nameProp.equals("")) {
					String[] nameProps = nameProp.split(",");
					for (String prop : nameProps) {
						entity.setValue(prop, relatedObject.getValue(prop));
					}
				}
			}
		} catch (UnsupportedEncodingException e) {
			LOGGER.error(e.getMessage(),e);
		}
		this.previous = entity;
	}
	@Override
	public void processContainer(Introspector obj, EdgeType type, MultivaluedMap<String, String> uriKeys,
			boolean isFinalContainer) throws AAIException {
		this.previous = obj;

		if (this.entity != null) {
			this.entity.setValue(obj.getName(), obj.getUnderlyingObject());
		} else {
			this.entity = obj;
			this.topEntity = obj;
		}
	}
}