/* ListLinkedAlgThread.java */

import java.awt.*;
import java.io.*;
import java.net.*;
import java.util.*;

import ciips.animation.*;

public class ListLinkedAlgThread extends AlgThread {
	
	ListLinked list;
	IntList int_list;
	static String[] ListLinkedDataSets = { "List 1", "List 2", "List 3"};
	private static String base_data_file_name = "graph.rb";
	// private static String base_data_file_name = "rbtlist";

	static final int x_offset = 10;
	static final int y_offset = 50;

	public ListLinkedAlgThread( AlgAnimFrame frame ) {
		super();
		// super( frame, ListLinkedDataSets, 2 );
		setParms( frame, ListLinkedDataSets, 2 );
		System.out.println("ListLinkedAlgThread constructed OK");
		}

	public boolean loadData( int choice ) {
		String fn;
		DataInputStream inStream;
		String line;

		System.out.println("loadData: choice " + choice );
		fn = base_data_file_name + choice;
		System.out.println("loadData: filename ["+fn+"]");
		try {
			URL dataURL = new URL(frame.getApplet().getCodeBase(), fn);
			int_list = new IntList( dataURL );
			} 
		catch (IOException e) {
			System.out.println("Data file or source file not found");
			} 
		catch (NullPointerException e) {}

		return int_list != null;
		}

	public void run() {
		int k;
		Graphics g1, g2, g3;
		Image beforeOffSc = null;
		Graphics befOffGraphics = null;

		// Capture reference to the current panel
		DrawingPanel dpAfter = frame.getCurrentPanel();
		// Temporary .. capture reference to the Before panel also
		DrawingPanel dpBefore = frame.getPreviousPanel();

		System.out.println("ListLinkedAlgThread:run - enter");
		if ( dpAfter == null ) {
			System.out.println( "run: null drawingPanel");
			return;
			}
		list = new ListLinked();

		//Initialise beforeOffsc
		list.initBeforeOffsc(frame, list);

		generateData();
		if ( int_list != null ) {
			for(k=0;k<int_list.size();k++) {
				// Get the next one to insert
				int data = int_list.elementAt( k );

				if(k!=0) {
					ShadowLabel bforeLabel = new ShadowLabel("Before New Insertion");
					bforeLabel.move(50, (dpBefore.getPanelHeight() - y_offset));
					bforeLabel.draw(befOffGraphics);
					g2 = dpBefore.getGraphics();
					g2.drawImage(beforeOffSc, 0, 0, null);		
					}	
					
			
				// Insert into the tree
				// tree.InsertNode( data, frame, tree );
//				list.insertBefore( data );
				g1 = dpAfter.getGraphics();
				list.draw(g1);
/****
				if (tree.GetOffscreen() == null) {
					System.out.println("AlgThread: Run: offscreen is null");
					return;
					}
				else {
					g1.drawImage(tree.GetOffscreen(), 0, 0, null);
					beforeOffSc = tree.GetOffscreen();
					befOffGraphics = tree.GetOffGraphics();
					frame.waitSkip();
					}
***/
				}
			ShadowLabel finalLabel = new ShadowLabel("Final Red-Black Tree");
			finalLabel.move(x_offset, (dpBefore.getPanelHeight() - y_offset));
			finalLabel.draw(befOffGraphics);
			g2 = dpBefore.getGraphics();
			g2.drawImage(beforeOffSc, 0, 0, null);

			// finish creating tree 
			frame.finishAlg();
			dpAfter.repaint();
			
			//g2.drawImage(beforeOffSc, 0, 0, null);
			}
		else {
			System.out.println("Data file not found\n");
			}
		}

	}