/*-
 * ============LICENSE_START=======================================================
 * org.openecomp.aai
 * ================================================================================
 * Copyright (C) 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=========================================================
 */

package org.openecomp.aai.ingestModel;

import java.io.File;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.util.ArrayList;
import java.util.Map;
import java.util.UUID;

import javax.xml.transform.stream.StreamSource;

import org.eclipse.persistence.dynamic.DynamicEntity;
import org.eclipse.persistence.jaxb.JAXBMarshaller;
import org.eclipse.persistence.jaxb.JAXBUnmarshaller;
import org.eclipse.persistence.jaxb.MarshallerProperties;
import org.eclipse.persistence.jaxb.dynamic.DynamicJAXBContext;

import org.openecomp.aai.domain.model.AAIResource;
import org.openecomp.aai.domain.model.AAIResources;
import org.openecomp.aai.util.AAIConfig;
import org.openecomp.aai.util.AAIConstants;
import com.google.common.base.CaseFormat;

/**
 * The Class CreateWidgetModels.
 */
public class CreateWidgetModels
{
	/**
	 * The main method.
	 *
	 * @param args the arguments
	 * @throws Exception the exception
	 */
	public static void main(String[] args) throws Exception {

		String _apiVersion = AAIConfig.get(AAIConstants.AAI_DEFAULT_API_VERSION_PROP);
		String widgetJsonDir = null;
		String modelVersion = null;
		if (args.length > 0) { 
			if (args[0] != null) {
				_apiVersion = args[0];
			}
			if (args[1] != null) { 
				widgetJsonDir = args[1];
			}
			if (args[2] != null) { 
				modelVersion = args[2];
			}
		}

		if (widgetJsonDir == null) { 
			System.err.println("You must specify a directory for widgetModelJson");
			System.exit(0);
		}
		if (modelVersion == null) { 
			System.err.println("You must specify a modelVersion");
			System.exit(0);
		}

		ArrayList<String> apiVersions = new ArrayList<String>();
		apiVersions.add(_apiVersion);
		final IngestModelMoxyOxm m = new IngestModelMoxyOxm();
		m.init(apiVersions, false);

		AAIResources aaiResources = IngestModelMoxyOxm.aaiResourceContainer.get(_apiVersion);

		DynamicJAXBContext jaxbContext = aaiResources.getJaxbContext();

		// iterate the collection of resources

		ArrayList<String> processedWidgets = new ArrayList<String>();
		for (Map.Entry<String, AAIResource> aaiResEnt : aaiResources.getAaiResources().entrySet()) { 
			DynamicEntity meObject = jaxbContext.newDynamicEntity("inventory.aai.openecomp.org." + _apiVersion + ".Model");
			// no need for a ModelVers DynamicEntity

			AAIResource aaiRes = aaiResEnt.getValue();

			if (aaiRes.getResourceType().equals("node")) {
				String resource = aaiRes.getSimpleName();

				if (processedWidgets.contains(resource)) {
					continue;
				}
				processedWidgets.add(resource);

				String widgetName = CaseFormat.UPPER_CAMEL.to(CaseFormat.LOWER_HYPHEN, resource);
				String filePathString = widgetJsonDir + "/" + widgetName + "-" + modelVersion + ".json";
				File f = new File(filePathString);

				String filePathString2 = widgetJsonDir + "/../widget-model-json-old/" + widgetName + "-" + modelVersion + ".json";
				File f2 = new File(filePathString2);

				if(!f.exists() && !f.isDirectory()) { 

					if (f2.exists()) { 
						System.out.println("Using old file for " + resource + ".");

						JAXBUnmarshaller unmarshaller = jaxbContext.createUnmarshaller();
						unmarshaller.setProperty("eclipselink.media-type", "application/json");
						unmarshaller.setProperty("eclipselink.json.include-root", false);
						Class<? extends DynamicEntity> resultClass = meObject.getClass();
						meObject = (DynamicEntity) unmarshaller.unmarshal(new StreamSource(f2), resultClass).getValue();
						// override, some of them are wrong
						meObject.set("modelVersion", modelVersion);
					} else { 

						System.out.println("Making new file for " + resource + ".");
						meObject.set("modelInvariantId", UUID.randomUUID().toString());
						meObject.set("modelType", "widget");
						DynamicEntity mevObject = jaxbContext.newDynamicEntity("inventory.aai.openecomp.org." + _apiVersion + ".ModelVer");
						DynamicEntity mevsObject = jaxbContext.newDynamicEntity("inventory.aai.openecomp.org." + _apiVersion + ".ModelVers");
						mevObject.set("modelVersionId", UUID.randomUUID().toString());
						mevObject.set("modelVersion", modelVersion);
						mevObject.set("modelName", widgetName);
						// make a list of dynamic Entities
						ArrayList<DynamicEntity> mevsList = new ArrayList<DynamicEntity>();
						// add this one, it will be the only one in the list in this case
						mevsList.add(mevObject);
						mevsObject.set("modelVer", mevsList);
						// Have to figure out how to add my mev object to the mevsObject, 
						// the modelVers is a list of dynamic entities so we can just attach the array here
						meObject.set("modelVers",mevsObject);
					}

					// put it out as JSON

					JAXBMarshaller marshaller = jaxbContext.createMarshaller();
					marshaller.setProperty(JAXBMarshaller.JAXB_FORMATTED_OUTPUT, true);

					marshaller.setProperty("eclipselink.media-type", "application/json");
					marshaller.setProperty("eclipselink.json.include-root", false);
					marshaller.setProperty(MarshallerProperties.JSON_MARSHAL_EMPTY_COLLECTIONS, Boolean.FALSE) ;

					StringWriter writer = new StringWriter();
					marshaller.marshal(meObject, writer);
					PrintWriter out = new PrintWriter(f);
					out.println(writer.toString());
					out.close();

				} else { 
					System.out.println("File already exists for " + resource + ".  Skipping.");
				}
			}
		}
		System.exit(0);
	}
}