package org.madore.damlengine;

import java.util.ArrayList;
import java.util.regex.Pattern;
import org.w3c.dom.*;

public class TodoDamlElement extends TodoDefaultElement {

    public static class Factory extends TodoElement.Factory {
	public TodoDamlElement newItem(Element node,
				       TodoContext context,
				       TodoItem.Options options) {
	    return new TodoDamlElement(node, context, options);
	}
    }

    public TodoDamlElement(Element node,
			   TodoContext context,
			   TodoItem.Options options) {
	super(node, context, options);
    }

    public static class DamlOptions extends TodoItem.Options {
    }

    public void handleNodeOnly() {
	if ( ! ( options instanceof DamlEngine.RootOptions ) )
	    throw new Error("daml node can only be root node");
	String uriToTop = node.getAttributeNS(null, "uri-to-top");
	if ( uriToTop != null )
	    context.uriToTop = uriToTop;
	String fileName = node.getAttributeNS(null, "file.name");
	if ( fileName != null )
	    context.fileName = fileName;

	if ( context.htmlNode != null )
	    throw new Error("html node already defined at daml node");
	context.htmlNode = context.doc.createElementNS(DamlEngine.XHTML_NS, "html");
	String lang = LangHelper.getLangNorec(node);
	if ( lang != null )
	    LangHelper.setLangNorec(context.htmlNode, lang);
	node.getParentNode().replaceChild(context.htmlNode, node);
	context.htmlNode.appendChild(context.doc.createTextNode("\n"));
	context.htmlNode.appendChild(context.doc.createComment(" This file is automatically generated.  Do not edit! "));
	context.htmlNode.appendChild(context.doc.createTextNode("\n"));
	if ( context.headNode != null )
	    throw new Error("head node already defined at daml node");
	context.headNode = context.doc.createElementNS(DamlEngine.XHTML_NS, "head");
	context.htmlNode.appendChild(context.headNode);
	context.htmlNode.appendChild(context.doc.createTextNode("\n"));
	context.headNode.appendChild(context.doc.createTextNode("\n"));

	ArrayList<Node> childList = getChildList(this.node);
	ArrayList<TodoElement> toProcess = new ArrayList<TodoElement>(childList.size());
	for ( Node child : childList ) {
	    if ( child.getNodeType() == Node.ELEMENT_NODE ) {
		if ( child.getLocalName().equals("body") ) {
		    context.htmlNode.appendChild(context.doc.createTextNode("\n"));
		    context.htmlNode.appendChild(child);
		    context.htmlNode.appendChild(context.doc.createTextNode("\n"));
		} else {
		    context.headNode.appendChild(child);
		    context.headNode.appendChild(context.doc.createTextNode("\n"));
		}
		TodoElement it
		    = TodoElement.getTodoElement((Element)child, this.context,
						 new DamlOptions());
		toProcess.add(it);
	    } else if ( child.getNodeType() == Node.TEXT_NODE
			|| child.getNodeType() == Node.CDATA_SECTION_NODE ) {
		if ( ! Pattern.matches("^\\s*$",((CharacterData)child).getData()) )
		    throw new Error("daml element cannot contain text");
	    }
	}
	this.ownerDeque.registerAtStart(toProcess);
    }

}