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

import java.io.InputStream;

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

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

@Log
public final 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();
        String resultName = "";
        int resultIcon = 0;
        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()) {
            resultName = name;
        }

        String icon = parser.getValueOfElement(WOOMY_METADATA_ICON);
        if (icon != null && !icon.isEmpty()) {
            int icon_val = Integer.parseInt(icon);
            resultIcon = icon_val;
        }

        WoomyMeta result = new WoomyMeta(resultName, resultIcon);

        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;
    }

}