package usda.weru.mcrew.timeline;

import com.klg.jclass.cell.JCCellInfo;
import com.klg.jclass.cell.JCLightCellRenderer;
import com.klg.jclass.table.JCCellStyle;
import com.klg.jclass.table.JCTableCellInfo;
import de.schlichtherle.truezip.file.TFile;

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.Graphics;
import java.math.BigInteger;
import java.util.HashMap;
import java.util.Map;
import javax.swing.ImageIcon;

import org.apache.log4j.Logger;
import org.w3c.dom.DOMException;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.w3c.dom.traversal.DocumentTraversal;
import org.w3c.dom.traversal.NodeFilter;
import org.w3c.dom.traversal.TreeWalker;

import usda.weru.mcrew.RowInfo;
import static usda.weru.mcrew.RowInfo.blank;
import usda.weru.mcrew.XMLDoc;

/**
 * This class handles the configuration options attached to the timeline.
 * @author jonathanhornbaker
 */
public class TimelineConfig 
{
    private static final Logger LOGGER = Logger.getLogger(TimelineConfig.class);
    private static final String IS_LISTENING = "TIMELINE_DATA_IS_LISTENING";
    private static boolean listeningTest = false;
    
    static int height = 10;
    static int width = 2;
    
    private static String c_operationDateFormat = "MMM DD, YYYY";
    
    
    private static String CONFIG_FILE = TFile.separator + "timeline" + TFile.separator + "timelineConfig.xml";
    
    /**
     * Driver function for initializing data contained within the timeline config.
     */
    public static void initialize()
    {
        initData(System.getProperty("user.dir") + TFile.separator 
                + "mcrew_cfg"+ CONFIG_FILE);
        //end initialize()
    }
    
    /**
     * Reads in the timelineconfig file and stores it's data for access by other
     * timeline classes.
     * @param docName 
     */
    private static void initData(String docName)
    {
        Document doc = XMLDoc.getDocument(docName);
        if (doc != null) doc.normalize(); 
        else return;
        try 
        {
            DocumentTraversal traversable = (DocumentTraversal) doc;
            TreeWalker walker = traversable.createTreeWalker(doc.getDocumentElement(), NodeFilter.SHOW_ALL, null, false);
            Node node = walker.firstChild();
            while(node != null)
            {
                String name = node.getNodeName();
                String nodeData = XMLDoc.getTextData(node);
                
                switch(name)
                {
                    case "height":
                        try { height = Integer.parseInt(nodeData); }
                        catch(NumberFormatException nfe) { LOGGER.warn("Failed to parse"
                                + "height value from TimelineConfig.  Using default."); }
                        break;
                    default:
                }
                node = walker.nextSibling();
            }
        } 
        catch (DOMException DOMEx) { return; }
        //end initData()
    } 
    
    /**
     * Essentially a least common multiple function.
     * @param rot
     * @return 
     */
    public static int getRotationYears(int[] rot)
    {
        BigInteger years = new BigInteger("1");
        BigInteger curr;
        for(int item : rot)
        {
            curr = new BigInteger("" + item);
            years = curr.multiply(years.divide(years.gcd(curr)));
        }
        return years.intValue();
    }
    //end TimelineConfig
}