package org.madore.damlengine;

import java.util.ArrayList;
import java.util.regex.Pattern;
import java.io.Reader;
import java.io.InputStreamReader;
import java.io.BufferedReader;
import java.io.IOException;
import java.nio.file.Files;
import org.w3c.dom.*;

public final class TodoDamlElement extends TodoDefaultElement {

    public static class Factory extends TodoElement.Factory {
	@Override
	public TodoDamlElement newItem(Element node,
				       Context ctx,
				       TodoItem caller) {
	    return new TodoDamlElement(node, ctx, caller);
	}
    }

    public TodoDamlElement(Element node,
			   Context ctx,
			   TodoItem caller) {
	super(node, ctx, caller);
    }

    @Override
    public void handleNodeOnly() {
	if ( ! ( caller instanceof DamlEngine.RootTodo ) )
	    throw new IllegalArgumentException("daml node can only be root node");
	final String uriToTopName = "uri-to-top";
	if ( node.hasAttributeNS(null, uriToTopName) )
	    ctx.gc.uriToTop = node.getAttributeNS(null, uriToTopName);
	final String fileNameName = "file.name";
	if ( node.hasAttributeNS(null, fileNameName) )
	    ctx.gc.fileName = node.getAttributeNS(null, fileNameName);

	Element htmlNode = ctx.doc.createElementNS(DamlEngine.XHTML_NS, "html");
	if ( ctx.gc.htmlNode != null )
	    throw new IllegalStateException("html node already defined at daml node");
	ctx.gc.htmlNode = htmlNode;
	String lang = LangHelper.getLangNorec(node);
	if ( lang != null )
	    LangHelper.setLangNorec(htmlNode, lang);
	node.getParentNode().replaceChild(htmlNode, node);
	htmlNode.appendChild(ctx.doc.createTextNode("\n"));
	htmlNode.appendChild(ctx.doc.createComment(" This file is automatically generated.  Do not edit! "));
	htmlNode.appendChild(ctx.doc.createTextNode("\n"));
	Element headNode = ctx.doc.createElementNS(DamlEngine.XHTML_NS, "head");
	if ( ctx.gc.headNode != null )
	    throw new IllegalStateException("head node already defined at daml node");
	ctx.gc.headNode = headNode;
	htmlNode.appendChild(headNode);
	htmlNode.appendChild(ctx.doc.createTextNode("\n"));
	headNode.appendChild(ctx.doc.createTextNode("\n"));
	Element bodyNode = ctx.doc.createElementNS(DamlEngine.XHTML_NS, "body");
	htmlNode.appendChild(bodyNode);
	htmlNode.appendChild(ctx.doc.createTextNode("\n"));
	bodyNode.setAttributeNS(null, "onload", "if (onLoad) { onLoad(); }");
	Element earlyScript = ctx.doc.createElementNS(DamlEngine.XHTML_NS, "script");
	earlyScript.setAttributeNS(null, "type", "text/javascript");
	earlyScript.appendChild(ctx.doc.createTextNode("if (onEarly) { onEarly(); }"));
	bodyNode.appendChild(ctx.doc.createTextNode("\n"));
	bodyNode.appendChild(earlyScript);

	ctx.gc.styleContent = new StringBuffer();
	try {
	    Reader rd = new BufferedReader(new InputStreamReader(Files.newInputStream(DamlEngine.templatePath.resolve("included.css")), "UTF-8"));
	    int ch;
	    while ((ch = rd.read()) > -1)
		ctx.gc.styleContent.append((char)ch);
	    rd.close();
	} catch (IOException e) {
	    throw new RuntimeException(e);
	}
	ctx.gc.scriptContent = new StringBuffer();
	try {
	    Reader rd = new BufferedReader(new InputStreamReader(Files.newInputStream(DamlEngine.templatePath.resolve("included.js")), "UTF-8"));
	    int ch;
	    while ((ch = rd.read()) > -1)
		ctx.gc.scriptContent.append((char)ch);
	    rd.close();
	} catch (IOException e) {
	    throw new RuntimeException(e);
	}

	Element meta;
	meta = ctx.doc.createElementNS(DamlEngine.XHTML_NS, "meta");
	meta.setAttributeNS(null, "charset", "utf-8");
	headNode.appendChild(meta);
	headNode.appendChild(ctx.doc.createTextNode("\n"));
	meta = ctx.doc.createElementNS(DamlEngine.XHTML_NS, "meta");
	meta.setAttributeNS(null, "name", "viewport");
	meta.setAttributeNS(null, "content", "width=device-width, initial-scale=1");
	headNode.appendChild(meta);
	headNode.appendChild(ctx.doc.createTextNode("\n"));
	meta = ctx.doc.createElementNS(DamlEngine.XHTML_NS, "link");
	meta.setAttributeNS(null, "rel", "Shortcut Icon");
	meta.setAttributeNS(null, "href", (((ctx.gc.uriToTop!=null)?ctx.gc.uriToTop:"")
					   +"favicon.ico"));
	headNode.appendChild(meta);
	headNode.appendChild(ctx.doc.createTextNode("\n"));

	// Twitter summary card
	if ( ctx.wsc != null && ctx.wsc instanceof Context.WeblogSingleSelectionContext ) {
	    meta = ctx.doc.createElementNS(DamlEngine.XHTML_NS, "meta");
	    meta.setAttributeNS(null, "name", "twitter:card");
	    meta.setAttributeNS(null, "content", "summary");
	    headNode.appendChild(meta);
	    headNode.appendChild(ctx.doc.createTextNode("\n"));
	    meta = ctx.doc.createElementNS(DamlEngine.XHTML_NS, "meta");
	    meta.setAttributeNS(null, "name", "twitter:site");
	    meta.setAttributeNS(null, "content", "@gro_tsen");
	    headNode.appendChild(meta);
	    headNode.appendChild(ctx.doc.createTextNode("\n"));
	    final WeblogSummary wsum = WeblogSummary.getSummary(ctx.dc);
	    if ( wsum != null ) {
		final WeblogSummary.EntrySummary esum
		    = wsum.entries.get(Integer.valueOf(((Context.WeblogSingleSelectionContext)(ctx.wsc)).number));
		if ( esum != null && esum.title != null ) {
		    meta = ctx.doc.createElementNS(DamlEngine.XHTML_NS, "meta");
		    meta.setAttributeNS(null, "name", "twitter:title");
		    meta.setAttributeNS(null, "content", esum.title);
		    headNode.appendChild(meta);
		    headNode.appendChild(ctx.doc.createTextNode("\n"));
		}
	    }
	}

	ArrayList<Node> childList = getChildList(this.node);
	ArrayList<TodoElement> toProcessFirst = new ArrayList<TodoElement>();
	ArrayList<TodoElement> toProcess = new ArrayList<TodoElement>(childList.size()+8);
	Element header = ctx.doc.createElementNS(DamlEngine.XHTML_NS, "header");
	bodyNode.appendChild(ctx.doc.createTextNode("\n"));
	bodyNode.appendChild(header);
	Element hgroup = ctx.doc.createElementNS(DamlEngine.XHTML_NS, "hgroup");
	header.appendChild(ctx.doc.createTextNode("\n"));
	header.appendChild(hgroup);
	if ( node.getAttributeNS(null, "notitle").equals("") ) {
	    Element token = ctx.doc.createElementNS(DamlEngine.DAML_NS,
						    "d:implicit-do-title");
	    hgroup.appendChild(ctx.doc.createTextNode("\n"));
	    hgroup.appendChild(token);
	    toProcess.add(new TodoTitleOrSubtitle(TodoTitleOrSubtitle.Type.TITLE,
						  token, this.ctx, this));
	}
	if ( node.getAttributeNS(null, "nosubtitle").equals("") ) {
	    Element token = ctx.doc.createElementNS(DamlEngine.DAML_NS,
						    "d:implicit-do-subtitle");
	    hgroup.appendChild(ctx.doc.createTextNode("\n"));
	    hgroup.appendChild(token);
	    toProcess.add(new TodoTitleOrSubtitle(TodoTitleOrSubtitle.Type.SUBTITLE,
						  token, this.ctx, this));
	}
	if ( node.getAttributeNS(null, "nonavbar").equals("") ) {
	    Element token = ctx.doc.createElementNS(DamlEngine.DAML_NS,
						    "d:implicit-do-navbar");
	    header.appendChild(ctx.doc.createTextNode("\n"));
	    header.appendChild(token);
	    toProcess.add(new TodoNavbar(token, this.ctx, this));
	}
	if ( node.getAttributeNS(null, "notranslations").equals("") ) {
	    Element token = ctx.doc.createElementNS(DamlEngine.DAML_NS,
						    "d:implicit-do-translations");
	    header.appendChild(ctx.doc.createTextNode("\n"));
	    header.appendChild(token);
	    toProcess.add(new TodoTranslations(token, this.ctx, this));
	}
	for ( Node child : childList ) {
	    if ( child.getNodeType() == Node.ELEMENT_NODE ) {
		if ( child.getLocalName().equals("body")
		     || child.getLocalName().equals("weblog") ) {
		    bodyNode.appendChild(child);
		    bodyNode.appendChild(ctx.doc.createTextNode("\n"));
		    TodoElement it
			= TodoElement.getTodoElement((Element)child, this.ctx, this);
		    toProcess.add(it);
		} else {
		    headNode.appendChild(child);
		    headNode.appendChild(ctx.doc.createTextNode("\n"));
		    TodoElement it
			= TodoElement.getTodoElement((Element)child, this.ctx, this);
		    toProcessFirst.add(it);
		}
	    } else if ( child.getNodeType() == Node.TEXT_NODE
			|| child.getNodeType() == Node.CDATA_SECTION_NODE ) {
		if ( ! Pattern.matches("^\\s*$",((CharacterData)child).getData()) )
		    throw new IllegalArgumentException("daml element cannot contain text");
	    }
	}
	if ( node.getAttributeNS(null, "nofooter").equals("") ) {
	    Element token = ctx.doc.createElementNS(DamlEngine.DAML_NS,
						    "d:implicit-do-footer");
	    bodyNode.appendChild(token);
	    bodyNode.appendChild(ctx.doc.createTextNode("\n"));
	    toProcess.add(new TodoFooter(token, this.ctx, this));
	}
	this.ownerDeque.registerAtStart(toProcess);
	this.ownerDeque.registerAtStart(toProcessFirst);
	this.ownerDeque.
	    registerAtEnd(new TodoStyleOrScript.
			  HeadStyleOrScript(TodoStyleOrScript.Type.STYLE,
					    this.ctx, this));
	this.ownerDeque.
	    registerAtEnd(new TodoStyleOrScript.
			  HeadStyleOrScript(TodoStyleOrScript.Type.SCRIPT,
					    this.ctx, this));
    }

}