/*
 * Copyright Red Hat, Inc. and/or its affiliates
 * and other contributors as indicated by the @author tags and
 * the COPYRIGHT.txt file distributed with this work.
 *
 * 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.
 */
package org.teiid.translator.odata4;

import java.util.List;

import org.apache.olingo.commons.api.data.ComplexValue;
import org.apache.olingo.commons.api.data.Entity;
import org.apache.olingo.commons.api.data.Property;

public class ODataDocument extends org.teiid.translator.document.Document {

	ODataDocument(String name, ODataDocument parent) {
		super(name, false, parent);
	}

	public ODataDocument() {
	}

	public static ODataDocument createDocument(Entity entity) {
		ODataDocument document = new ODataDocument();
		List<Property> properties = entity.getProperties();
		for (Property property : properties) {
			populateDocument(property, document);
		}
		return document;
	}

	public static ODataDocument createDocument(ComplexValue complex) {
		ODataDocument document = new ODataDocument();
		List<Property> properties = complex.getValue();
		for (Property property : properties) {
			populateDocument(property, document);
		}
		return document;
	}

	private static ODataDocument createDocument(String name,
	                                            ComplexValue complex, ODataDocument parent) {
		ODataDocument document = new ODataDocument(name, parent);
		List<Property> properties = complex.getValue();
		for (Property property : properties) {
			populateDocument(property, document);
		}
		return document;
	}

	@SuppressWarnings("unchecked")
	private static void populateDocument(Property property, ODataDocument document) {
		if (property.isCollection()) {
			if (property.isPrimitive()) {
				document.addProperty(property.getName(), property.asCollection());
			} else {
				List<ComplexValue> complexRows = (List<ComplexValue>) property.asCollection();
				for (ComplexValue complexRow : complexRows) {
					document.addChildDocument(property.getName(), createDocument(property.getName(), complexRow, document));
				}
			}
		} else {
			if (property.isPrimitive()) {
				document.addProperty(property.getName(), property.asPrimitive());
			} else if (property.isComplex()) {
				document.addChildDocument(property.getName(), createDocument(
						property.getName(), property.asComplex(), document));
			} else if (property.isGeospatial()) {
				document.addProperty(property.getName(), property.asGeospatial());
			} else {
				throw new AssertionError(property.getType() + " not supported"); //$NON-NLS-1$
			}
		}
	}
}
