package org.madore.damlengine;

import java.util.ArrayList;
import java.util.Map;
import java.util.HashMap;
import org.w3c.dom.*;
import org.w3c.dom.ls.DOMImplementationLS;
import org.w3c.dom.ls.LSParser;
import org.w3c.dom.ls.LSInput;

public final class TodoWeblogSelectionElement extends TodoDefaultElement {

    public enum Type {
	RECENT_COUNT,
	MONTH_NUMERIC,
	MONTH_LITERAL,
	CATEGORY_NAME,
	CATEGORY_CODE,
	SINGLE_NUMBER,
	SINGLE_TITLE;
    }

    public static class Factory extends TodoElement.Factory {
	final Type t;
	public Factory(Type t) {
	    super();
	    this.t = t;
	}
	@Override
	public TodoWeblogSelectionElement newItem(Element node,
						  Context ctx,
						  TodoItem caller) {
	    return new TodoWeblogSelectionElement(t, node, ctx, caller);
	}
    }

    final Type t;

    public TodoWeblogSelectionElement(Type t,
				      Element node,
				      Context ctx,
				      TodoItem caller) {
	super(node, ctx, caller);
	this.t = t;
    }

    protected final static Map<String,Map<String,String>> categoryNames;

    static {
	categoryNames = new HashMap<String,Map<String,String>>();
	categoryNames.put("en", new HashMap<String,String>());
	categoryNames.put("fr", new HashMap<String,String>());
	categoryNames.put("de", new HashMap<String,String>());
	categoryNames.put("ia", new HashMap<String,String>());
	categoryNames.get("en").put("glf", "Gratuitous Literary Fragments");
	categoryNames.get("fr").put("glf", "Fragments litt\u00e9raires gratuits");
	categoryNames.get("ia").put("glf", "Fragmentos litterari gratuite");
	categoryNames.get("en").put("math", "Mathematics");
	categoryNames.get("fr").put("math", "Math\u00e9matiques");
	categoryNames.get("en").put("phys", "Physics");
	categoryNames.get("fr").put("phys", "Physique");
	categoryNames.get("en").put("ego", "my life");
	categoryNames.get("fr").put("ego", "ma vie");
	categoryNames.get("en").put("html", "Web technologies");
	categoryNames.get("fr").put("html", "technologies Web");
	categoryNames.get("en").put("gay", "gay themes");
	categoryNames.get("fr").put("gay", "th\u00e8mes gay");
	categoryNames.get("en").put("relig", "Religion");
	categoryNames.get("fr").put("relig", "Religion");
	categoryNames.get("en").put("philo", "Philosophy");
	categoryNames.get("fr").put("philo", "Philosophie");
	categoryNames.get("en").put("polit", "Politics");
	categoryNames.get("fr").put("polit", "Politique");
	categoryNames.get("ia").put("polit", "Politica");
	categoryNames.get("en").put("lex", "Law");
	categoryNames.get("fr").put("lex", "Droit");
	categoryNames.get("en").put("libri", "Books");
	categoryNames.get("fr").put("libri", "Livres");
	categoryNames.get("en").put("lang", "Languages & Linguistics");
	categoryNames.get("fr").put("lang", "Langues & Linguistique");
	categoryNames.get("ia").put("lang", "Liguas & Linguistica");
	categoryNames.get("en").put("meteo", "Meteorology");
	categoryNames.get("fr").put("meteo", "M\u00e9t\u00e9orologie");
	categoryNames.get("en").put("unicode", "Unicode");
	categoryNames.get("fr").put("unicode", "Unicode");
	categoryNames.get("en").put("cinema", "Films & Movies");
	categoryNames.get("fr").put("cinema", "Films & Cin\u00e9ma");
	categoryNames.get("de").put("cinema", "Film & Kino");
	categoryNames.get("en").put("linux", "Linux");
	categoryNames.get("fr").put("linux", "Linux");
	categoryNames.get("en").put("comp-hw", "Computer hardware");
	categoryNames.get("fr").put("comp-hw", "Mat\u00e9riel informatique");
	categoryNames.get("en").put("econom", "Economics");
	categoryNames.get("fr").put("econom", "\u00c9conomie");
	categoryNames.get("en").put("auto-moto", "Auto-Moto");
	categoryNames.get("fr").put("auto-moto", "Auto-Moto");
	categoryNames.get("en").put("gardinia", "Parks & Gardens");
	categoryNames.get("fr").put("gardinia", "Parcs & Jardins");
	categoryNames.get("en").put("covid-19", "Covid-19");
	categoryNames.get("fr").put("covid-19", "Covid-19");
	categoryNames.get("en").put("meta", "Meta");
	categoryNames.get("fr").put("meta", "M\u00e9ta");
    }

    public static String categoryName(String code, String lang) {
	if ( categoryNames.get(lang) == null )
	    return code;
	String name = categoryNames.get(lang).get(code);
	if ( name == null )
	    return code;
	return name;
    }

    @Override
    public void handleNodeOnly() {
	if ( ctx.wsc == null )
	    throw new IllegalStateException("weblog-selection element encountered with no weblog selection state");
	// String lang = LangHelper.getLangRec(node);
	String str;
	Node newNode;
	switch ( t ) {
	case RECENT_COUNT:
	    if ( ! ( ctx.wsc instanceof Context.WeblogRecentSelectionContext ) )
		throw new IllegalStateException("weblog-selection-recent-count element encountered while not in weblog recent selection state");
	    str = String.format("%d", ((Context.WeblogRecentSelectionContext)(ctx.wsc)).count);
	    newNode = ctx.doc.createTextNode(str);
	    node.getParentNode().replaceChild(newNode, node);
	    break;
	case MONTH_NUMERIC:
	    if ( ! ( ctx.wsc instanceof Context.WeblogMonthSelectionContext ) )
		throw new IllegalStateException("weblog-selection-month-numeric element encountered while not in weblog month selection state");
	    str = ((Context.WeblogMonthSelectionContext)(ctx.wsc)).year + "-"
		+ ((Context.WeblogMonthSelectionContext)(ctx.wsc)).month;
	    newNode = ctx.doc.createTextNode(str);
	    node.getParentNode().replaceChild(newNode, node);
	    break;
	case MONTH_LITERAL:
	    if ( ! ( ctx.wsc instanceof Context.WeblogMonthSelectionContext ) )
		throw new IllegalStateException("weblog-selection-month-literal element encountered while not in weblog month selection state");
	    int mnum = Integer.parseInt(((Context.WeblogMonthSelectionContext)(ctx.wsc)).month);
	    String lang = LangHelper.getLangRec(node);
	    String[] mnames = TodoWeblogMonthsCalendar.monthNames.get(lang);
	    if ( mnames == null )
		mnames = TodoWeblogMonthsCalendar.monthNamesEn;
	    str = mnames[mnum] + " " + ((Context.WeblogMonthSelectionContext)(ctx.wsc)).year;
	    newNode = ctx.doc.createTextNode(str);
	    node.getParentNode().replaceChild(newNode, node);
	    LangHelper.setLangRec(node, lang);
	    break;
	case CATEGORY_CODE:
	    if ( ! ( ctx.wsc instanceof Context.WeblogCategorySelectionContext ) )
		throw new IllegalStateException("weblog-selection-cat-code element encountered while not in weblog category selection state");
	    str = ((Context.WeblogCategorySelectionContext)(ctx.wsc)).code;
	    newNode = ctx.doc.createTextNode(str);
	    node.getParentNode().replaceChild(newNode, node);
	    break;
	case CATEGORY_NAME:
	    if ( ! ( ctx.wsc instanceof Context.WeblogCategorySelectionContext ) )
		throw new IllegalStateException("weblog-selection-cat-name element encountered while not in weblog category selection state");
	    str = categoryName(((Context.WeblogCategorySelectionContext)(ctx.wsc)).code, LangHelper.getLangRec(node));
	    newNode = ctx.doc.createTextNode(str);
	    node.getParentNode().replaceChild(newNode, node);
	    break;
	case SINGLE_NUMBER:
	    if ( ! ( ctx.wsc instanceof Context.WeblogSingleSelectionContext ) )
		throw new IllegalStateException("weblog-selection-single-number element encountered while not in weblog single entry selection state");
	    str = String.format("%04d", ((Context.WeblogSingleSelectionContext)(ctx.wsc)).number);
	    newNode = ctx.doc.createTextNode(str);
	    node.getParentNode().replaceChild(newNode, node);
	    break;
	case SINGLE_TITLE:
	    if ( ! ( ctx.wsc instanceof Context.WeblogSingleSelectionContext ) )
		throw new IllegalStateException("weblog-selection-single-title element encountered while not in weblog single entry selection state");
	    WeblogSummary wsum = WeblogSummary.getSummary(ctx.dc);
	    if ( wsum == null || wsum.entries == null )
		throw new IllegalStateException("failed to obtain weblog summary for weblog-selection-single-title");
	    WeblogSummary.EntrySummary esum
		= wsum.entries.get(Integer.valueOf(((Context.WeblogSingleSelectionContext)(ctx.wsc)).number));
	    if ( esum == null )
		throw new IllegalStateException("tried weblog-selection-single-title on inexistent entry");
	    {
		Element span = ctx.doc.createElementNS(DamlEngine.XHTML_NS, "span");
		node.getParentNode().replaceChild(span, node);
		LangHelper.setLangRec(span, esum.lang);
		DOMImplementationLS domi
		    = (DOMImplementationLS)ctx.doc.getImplementation();
		LSParser par = domi.createLSParser(DOMImplementationLS.MODE_SYNCHRONOUS, null);
		LSInput input = domi.createLSInput();
		if ( esum.titleXml == null ) {
		    // If there is no title, use number instead.
		    str = String.format("#%04d", ((Context.WeblogSingleSelectionContext)(ctx.wsc)).number);
		    Node strNode = ctx.doc.createTextNode(str);
		    span.appendChild(strNode);
		    break;  // Leave now!
		}
		input.setStringData(esum.titleXml);
		Document temp = par.parse(input);
		Node titleNode = ctx.doc.adoptNode(temp.getDocumentElement());
		String explicitLang = LangHelper.getLangNorec(titleNode);
		if ( explicitLang != null )
		    LangHelper.setLangNorec(span, explicitLang);
		ArrayList<Node> childList = getChildList(titleNode);
		for ( Node child : childList )
		    span.appendChild(child);
	    }
	    break;
	default:
	    throw new AssertionError("unknown type");
	}
    }

}