package de.mas.jnus.lib.implementations.woomy;

import java.io.InputStream;

import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

import de.mas.jnus.lib.utils.XMLParser;
import lombok.extern.java.Log;

@Log
public class WoomyMetaParser extends XMLParser{
    private static final String WOOMY_METADATA_NAME = "name";
    private static final String WOOMY_METADATA_ICON = "icon";
    
    private static final String WOOMY_METADATA_ENTRIES = "entries";
    private static final String WOOMY_METADATA_ENTRY_NAME = "name";
    private static final String WOOMY_METADATA_ENTRY_FOLDER = "folder";
    private static final String WOOMY_METADATA_ENTRY_ENTRIES = "entries";
    /**
     * Overwrite the default constructor to force the user to use the factory.
     */
    private WoomyMetaParser(){        
    }
    
    public static WoomyMeta parseMeta(InputStream data){
        XMLParser parser = new WoomyMetaParser();   
        WoomyMeta result = new WoomyMeta();
        try {
            parser.loadDocument(data);
        } catch(Exception e){
            log.info("Error while loading the data into the WoomyMetaParser");
            return null;
        }
        
        String name = parser.getValueOfElement(WOOMY_METADATA_NAME);
        if(name != null && !name.isEmpty()){
            result.setName(name);
        }
        
        String icon = parser.getValueOfElement(WOOMY_METADATA_ICON);
        if(icon != null && !icon.isEmpty()){
            int icon_val = Integer.parseInt(icon);            
            result.setIcon(icon_val);
        }
        Node entries_node = parser.getNodeByValue(WOOMY_METADATA_ENTRIES);
        
        NodeList entry_list = entries_node.getChildNodes();
        for(int i = 0;i<entry_list.getLength();i++){
            Node node = entry_list.item(i);
            
            String folder = getAttributeValueFromNode(node, WOOMY_METADATA_ENTRY_FOLDER);
            String entry_name = getAttributeValueFromNode(node, WOOMY_METADATA_ENTRY_NAME);
            String entry_count = getAttributeValueFromNode(node, WOOMY_METADATA_ENTRY_ENTRIES);
            int entry_count_val = Integer.parseInt(entry_count);
            result.addEntry(entry_name, folder, entry_count_val);
        }
        
        return result;
    }

}