/**
 *                                                                            
 * Copyright (c) 2011, 2016 - Loetz GmbH&Co.KG (69115 Heidelberg, Germany)
 *                                                                            
 * All rights reserved. This program and the accompanying materials           
 * are made available under the terms of the Eclipse Public License 2.0        
 * which accompanies this distribution, and is available at                  
 * https://www.eclipse.org/legal/epl-2.0/                                 
 *                                 
 * SPDX-License-Identifier: EPL-2.0                                 
 *                                                                            
 * Contributors:   
 * Christophe Loetz (Loetz GmbH&Co.KG) - initial implementation 
 */
package org.eclipse.osbp.ide.core.ui.softwarefactory.extender;

import java.io.IOException;
import java.text.Normalizer;
import java.util.Iterator;
import java.util.List;

import org.eclipse.emf.ecore.EClass;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.resource.Resource;
import org.eclipse.osbp.xtext.addons.EObjectHelper;
import org.eclipse.xtext.naming.QualifiedName;
import org.eclipse.xtext.resource.IEObjectDescription;
import org.eclipse.xtext.resource.IResourceDescription;
import org.eclipse.xtext.resource.IResourceDescriptions;
import org.eclipse.xtext.resource.SaveOptions;
import org.eclipse.xtext.resource.XtextResource;
import org.eclipse.xtext.resource.XtextResourceSet;
import org.eclipse.xtext.ui.resource.XtextResourceSetProvider;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class ModelExtenderUtils {
	private ModelExtenderUtils() {
	}

	public enum DataType {
		NONE("none", null, null), DOUBLE("double", null, null), DOUBLECOLON("double", "###.00", "de_DE"), INT("int",
				null, null), UUID("uuid", null, null), TEXT("String", null,
						null), DATE("Date", "yyyyMMdd", null), BOOLEAN("boolean", null, null),
		// wora 15.12.2017 missing datatype
		BLOBMAPPING("BlobMapping", null, null);

		private String value;
		private String format;
		private String locale;

		private DataType(String value, String format, String locale) {
			this.value = value;
			this.format = format;
			this.locale = locale;
		}

		private DataType(DataType type) {
			this.value = type.value;
			this.format = type.format;
			this.locale = type.locale;
		}

		public String getValue() {
			return value;
		}

		public String getFormat() {
			return format;
		}

		public void setFormat(String format) {
			this.format = format;
		}

		public String getLocale() {
			return locale;
		}

	}

	private static final Logger LOGGER = LoggerFactory.getLogger(ModelExtenderUtils.class);

	// persist the modified model
	public static void writeModel(EObject model, String id) {
		writeResource(model.eResource(), id);
	}

	// persist the modified resource
	public static void writeResource(Resource resource, String id) {
		StringBuilder errors = new StringBuilder();
		try {
			XtextResource xR = (XtextResource) resource;
			if (xR.getErrors().isEmpty()) {
				resource.save(SaveOptions.newBuilder().format().getOptions().toOptionsMap());
			} else  {
				for(org.eclipse.emf.ecore.resource.Resource.Diagnostic error:xR.getErrors()) {
					errors.append(error.toString());
					errors.append("\n");
				}
				LOGGER.error("****************************");
				LOGGER.error("model {} diagnosic error {}", resource.getURI(), errors);
				LOGGER.error("****************************");
			}
			LOGGER.info("****** finished writing {}", id);
		} catch (IOException e) {
			LOGGER.error("{}", e);
		}
	}

	// get a name without characters from locale anomaly or punctuation, replace
	// blanks with underscores
	// avoid some keywords
	public static String normalizeName(String name) {
		String normalized = Normalizer.normalize(name, Normalizer.Form.NFKD).toLowerCase().replaceAll("[^a-z0-9 ]", "")
				.replace(" ", "_");
		if (normalized.equalsIgnoreCase("description")) {
			normalized = "_" + normalized;
		}
		return normalized;
	}

	// get an EObject from a full qualified datatype name
	public static EObject findAllEObject(IResourceDescriptions descs, EClass type, String fqn) {
		Iterable<IEObjectDescription> result = descs.getExportedObjects(type, QualifiedName.create(fqn.split("\\.")),
				true);
		if (result.iterator().hasNext()) {
			IEObjectDescription desc = result.iterator().next();
			return desc.getEObjectOrProxy();
		}
		return null;
	}

	// get an EObject list
	public static boolean findAllEObjects(IResourceDescriptions descs, EClass type, List<EObject> objects) {
		Iterable<IEObjectDescription> result = descs.getExportedObjectsByType(type);
		Iterator<IEObjectDescription> iter = result.iterator();
		while (iter.hasNext()) {
			IEObjectDescription desc = iter.next();
			objects.add(desc.getEObjectOrProxy());
		}
		return !objects.isEmpty();
	}

	// get an EObject from a full qualified datatype name
	public static EObject findEObject(IResourceDescription descs, EClass type, String fqn) {
		Iterable<IEObjectDescription> result = descs.getExportedObjects(type, QualifiedName.create(fqn.split("\\.")),
				true);
		if (result.iterator().hasNext()) {
			IEObjectDescription desc = result.iterator().next();
			return desc.getEObjectOrProxy();
		}
		return null;
	}

	// get all EObjects from a class
	public static boolean findEObjects(IResourceDescription descs, EClass type, List<EObject> objects) {
		Iterable<IEObjectDescription> result = descs.getExportedObjectsByType(type);
		Iterator<IEObjectDescription> iter = result.iterator();
		while (iter.hasNext()) {
			IEObjectDescription desc = iter.next();
			objects.add(desc.getEObjectOrProxy());
		}
		return !objects.isEmpty();
	}

	/**
	 * Returns the model which is to be modified, identified by projectPath.
	 * 
	 * @param projectPath
	 * @return
	 */
	public static <A extends EObject> A loadSemanticModel(ModelInstanceDescription packageDelta,
			XtextResourceSetProvider provider) {
		LOGGER.info("loading:" + packageDelta.getProject().getName());
		XtextResourceSet rs = (XtextResourceSet) provider.get(packageDelta.getProject());
		Resource modelResource = rs.getResource(packageDelta.getModelURI(), true);
		try {
			modelResource.load(null);
		} catch (IOException e) {
			LOGGER.error(e.getLocalizedMessage());
			return null;
		}
		@SuppressWarnings("unchecked")
		A model = (A) EObjectHelper.getSemanticElement(modelResource);
		LOGGER.info("finished loading:" + packageDelta.getProject().getName());
		return model;
	}
}