/*
 * Copyright 2013
 * 
 * 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.openntf.domino.design.impl;

import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.logging.Logger;

import org.openntf.domino.Database;
import org.openntf.domino.Document;
import org.openntf.domino.design.XspResource;
import org.openntf.domino.utils.DominoUtils;
import org.openntf.domino.utils.xml.XMLNode;

/**
 * @author jgallagher
 * 
 */
public abstract class AbstractXspResource extends AbstractDesignFileResource implements XspResource {
	private static final long serialVersionUID = 1L;
	@SuppressWarnings("unused")
	private static final Logger log_ = Logger.getLogger(AbstractXspResource.class.getName());

	private static final String CLASS_INDEX_ITEM = "$ClassIndexItem";

	protected AbstractXspResource(final Document document) {
		super(document);
	}

	/**
	 * @param database
	 */
	protected AbstractXspResource(final Database database) {
		super(database);
	}

	/* (non-Javadoc)
	 * @see org.openntf.domino.design.JavaResource#getClassNames()
	 */
	@Override
	public Collection<String> getClassNames() {
		List<String> classIndex = getItemValueStrings(CLASS_INDEX_ITEM);
		List<String> names = new ArrayList<String>();
		for (String path : classIndex) {
			if (path.startsWith("WEB-INF/classes/")) {
				names.add(DominoUtils.filePathToJavaBinaryName(path.substring(16), "/"));
			} else {
				names.add(""); // add blank entries, otherwise the wrong $ClassData item will be located
			}
		}
		return names;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.openntf.domino.design.JavaResource#getClassData()
	 */
	@Override
	public Map<String, byte[]> getClassData() {
		List<String> names = new ArrayList<String>(getClassNames());

		Map<String, byte[]> result = new HashMap<String, byte[]>();
		for (int i = 0; i < names.size(); i++) {
			byte[] classData = getFileDataRaw("$ClassData" + i);
			if (classData.length > 0) {
				result.put(names.get(i), classData);
			}
		}
		return result;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.openntf.domino.design.JavaResource#setClassData(java.util.Map)
	 */
	@Override
	public void setClassData(final Map<String, byte[]> classData) {
		// First step, clear out the existing data, index, and size fields
		XMLNode indexNode = getDxl().selectSingleNode("//item[@name='" + CLASS_INDEX_ITEM + "']");
		XMLNode itemParent = indexNode.getParentNode();
		List<XMLNode> names = indexNode.selectNodes(".//text");
		for (int i = 0; i < names.size(); i++) {
			XMLNode dataNode = getDxl().selectSingleNode("//item[@name='$ClassData" + i + "']");
			dataNode.getParentNode().removeChild(dataNode);
			XMLNode sizeNode = getDxl().selectSingleNode("//item[@name='$ClassSize" + i + "']");
			sizeNode.getParentNode().removeChild(sizeNode);

			indexNode.removeChild(names.get(i));
		}

		int index = 0;
		for (Map.Entry<String, byte[]> classEntry : classData.entrySet()) {
			XMLNode sizeNode = itemParent.addChildElement("item");
			sizeNode.setAttribute("name", "$ClassSize" + index);
			XMLNode sizeText = sizeNode.addChildElement("number");
			sizeText.setTextContent(String.valueOf(classEntry.getValue().length));

			setFileDataRaw("$ClassData" + index, classEntry.getValue());

			XMLNode name = indexNode.addChildElement("text");
			name.setTextContent("WEB-INF/classes/" + DominoUtils.javaBinaryNameToFilePath(classEntry.getKey(), "/"));

			index++;
		}
	}

}