package structure;

import java.util.*;

import org.graphstream.graph.*;
import org.graphstream.graph.implementations.SingleGraph;


/**
 * Class for display graph with GraphStream
 * @author loic, adama
 *
 */
public class MyGraph extends SingleGraph{

	
	// Grid associate to the graph
	private Grid grid;

	/**
	 * Build a graph with a grid
	 * 
	 * @param title
	 * @param grid
	 */
	public MyGraph(String title, Grid grid) {
		super(title);
		// Allow CSS on view
		System.setProperty("org.graphstream.ui.renderer", "org.graphstream.ui.j2dviewer.J2DGraphRenderer");
		
		// Set graph CSS
		this.addAttribute("ui.stylesheet", "url('resources/style.css')");

		// Assign grid
		this.grid=grid;
		
		int i=0;
		int ll=this.grid.getGrid().size();
		// Build node
		for(Router r : this.grid.getGrid()){
			if(i==0){
				this.addNode(r.name).setAttribute("ui.label", "Source");
			}
			else{
				if(i==ll-1){
					this.addNode(r.name).setAttribute("ui.label", "Destination");

				}
				else{
					this.addNode(r.name);

				}

			}
			i++;
			
		}
		
		// Build Edges
		this.buildEdges();
		
		//Build bestLink
		this.showBestLink();
		
	}

	
	/**
	 * Build edges
	 */
	public void buildEdges(){
		
		for(Router r : this.grid.getGrid()){
			 String current=r.name;
			 HashMap<Router, Integer> relier=r.getLinks();
			 Set<Router> k=relier.keySet();
			 Iterator<Router> i=k.iterator();
			 while(i.hasNext()){
				 Router currentRouter=i.next();
				 
				 String currentRouterName=currentRouter.name;
				 try{
						 Edge toAdd=this.addEdge(current+currentRouterName, current, currentRouterName);
						 toAdd.setAttribute("ui.label", relier.get(currentRouter));
				 }
				 catch(Exception e){
				 }				 
			 }
		 }
	}
	
	/**
	 * Update best link on screen
	 */
	public void showBestLink(){
		ArrayList<Integer> bestLink=this.grid.getLinks().get(this.grid.getBestLinkByProtocol());
		for(int i=0;i<bestLink.size();i++){
			Iterator<Node> nodes= this.getNodeIterator();
			while(nodes.hasNext()){
				Node node=nodes.next();
				Iterator<Edge> edges=node.getEdgeIterator();
				while(edges.hasNext()){
					Edge edge=edges.next();
					
					if(i<(bestLink.size()-1)){
						String src=this.grid.getGrid().get(bestLink.get(i)).name;
						String dest=this.grid.getGrid().get(bestLink.get(i+1)).name;
						if((edge.getNode0().getId().equals(src) && edge.getNode1().getId().equals(dest))||(edge.getNode1().getId().equals(src) && edge.getNode0().getId().equals(dest))){
							edge.setAttribute("ui.style", "fill-color:red;");
						}
					}
					
				}
			}
		}
	}

	/**
	 * Update all the graph on screen
	 */
	public void update(){
		// Reset color
		Iterator<Edge> edges=this.getEdgeIterator();
		while(edges.hasNext()){
			Edge edge=edges.next();
			edge.setAttribute("ui.style", "fill-color:black;");
		}
		// Update label
		edges=this.getEdgeIterator();
		while(edges.hasNext()){
			Edge edge=edges.next();
			for(Router r : this.grid.getGrid()){
				 String current=r.name;

				HashMap<Router, Integer> relier=r.getLinks();
				 Set<Router> k=relier.keySet();
				 Iterator<Router> i=k.iterator();
				 while(i.hasNext()){
					 Router currentRouter=i.next();
					 
					 String currentRouterName=currentRouter.name;
					 if(edge.getId().equals(current+currentRouterName)||edge.getId().equals(currentRouterName+current)){
						 edge.setAttribute("ui.label", relier.get(currentRouter));
					 }
				 }
			}	
		}
		this.showBestLink();
	}
	
}