package luan.modules;

import java.util.List;
import java.util.ArrayList;
import java.util.Set;
import java.util.HashSet;
import goodjava.html.Html;
import luan.LuanTable;
import luan.LuanException;


public final class HtmlLuan {

	public static String encode(String s) throws LuanException {
		Utils.checkNotNull(s);
		return Html.encode(s);
	}

	public static String decode(String s) {
		return Html.decode(s);
	}

	private static LuanTable tag(Html.Tag tag) throws LuanException {
		LuanTable tbl = new LuanTable();
		tbl.rawPut("type","tag");
		tbl.rawPut("name",tag.name);
		tbl.rawPut("attributes",new LuanTable(tag.attributes));
		tbl.rawPut("is_empty",tag.isEmpty);
		tbl.rawPut("raw",tag.raw);
		if( tag.style != null )
			tbl.rawPut("style",new LuanTable(tag.style));
		return tbl;
	}
	public static LuanTable parse(String text,LuanTable containerTagsTbl) {
		try {
			Set<String> containerTags = new HashSet();
			for( Object s : containerTagsTbl.asList() ) {
				containerTags.add((String)s);
			}
			List list = Html.parse(text,containerTags);
			List rtn = new ArrayList();
			for( Object el : list ) {
				if( el instanceof String ) {
					rtn.add(el);
				} else if( el instanceof Html.Tag ) {
					Html.Tag tag = (Html.Tag)el;
					rtn.add(tag(tag));
				} else if( el instanceof Html.Comment ) {
					Html.Comment comment = (Html.Comment)el;
					LuanTable tbl = new LuanTable();
					tbl.rawPut("type","comment");
					tbl.rawPut("text",comment.text);
					rtn.add(tbl);
				} else if( el instanceof Html.CData ) {
					Html.CData cdata = (Html.CData)el;
					LuanTable tbl = new LuanTable();
					tbl.rawPut("type","cdata");
					tbl.rawPut("text",cdata.text);
					rtn.add(tbl);
				} else if( el instanceof Html.Container ) {
					Html.Container container = (Html.Container)el;
					LuanTable tbl = new LuanTable();
					tbl.rawPut("type","container");
					tbl.rawPut("tag",tag(container.tag));
					tbl.rawPut("text",container.text);
					rtn.add(tbl);
				} else {
					throw new RuntimeException("invalid el "+el);
				}
			}
			return new LuanTable(rtn);
		} catch(LuanException e) {
			throw new RuntimeException(e);
		}
	}

}