package org.herac.tuxguitar.gui.items.xml;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Result;
import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;

import org.apache.log4j.Logger;
import org.herac.tuxguitar.gui.editors.chord.ChordSelector;
import org.herac.tuxguitar.gui.items.ToolItems;
import org.w3c.dom.Attr;
import org.w3c.dom.Document;
import org.w3c.dom.Node;

public class ToolBarsWriter {

  private static final String ATTR_ENABLED = "enabled";
  private static final String ATTR_NAME = "name";
  private static final String ITEM_LIST_TAG = "toolbars";
  private static final String ITEM_TAG = "toolbar";

  public static Document createDocument() throws ParserConfigurationException {
    DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
    DocumentBuilder builder = factory.newDocumentBuilder();
    Document document = builder.newDocument();
    return document;
  }

  public static void saveDocument(Document document, File file)
      throws FileNotFoundException, TransformerException {
    FileOutputStream fs = new FileOutputStream(file);

    // Write it out again
    TransformerFactory xformFactory = TransformerFactory.newInstance();
    Transformer idTransform = xformFactory.newTransformer();
    Source input = new DOMSource(document);
    Result output = new StreamResult(fs);
    idTransform.setOutputProperty(OutputKeys.INDENT, "yes");
    idTransform.transform(input, output);
  }

  public static void saveToolBars(ToolItems[] items, File file) {
    try {
      Document doc = createDocument();
      setToolBars(items, doc);
      saveDocument(doc, file);
    } catch (Throwable throwable) {
      LOG.error(throwable);
    }
  }
  

  /** The Logger for this class. */
  public static final transient Logger LOG = Logger
      .getLogger(ToolBarsWriter.class);
  

  private static void setToolBars(ToolItems[] items, Document document) {
    // chords tag
    Node listNode = document.createElement(ITEM_LIST_TAG);

    for (int i = 0; i < items.length; i++) {

      // chord tag
      Node node = document.createElement(ITEM_TAG);
      listNode.appendChild(node);

      // name attribute
      Attr attribute = document.createAttribute(ATTR_NAME);
      attribute.setNodeValue(items[i].getName());
      node.getAttributes().setNamedItem(attribute);

      // enabled attribute
      attribute = document.createAttribute(ATTR_ENABLED);
      attribute.setNodeValue(Boolean.toString(items[i].isEnabled()));
      node.getAttributes().setNamedItem(attribute);
    }

    document.appendChild(listNode);
  }
}