// #22
package ooos;

import java.net.*;

public class NetGraph {
  public static int N                = 6;
  public static int BASE_PORT        = 5800; 
  public static final int INF        = 99999;
  public static int nextPort         = BASE_PORT;
  public static final int DECODE_ERR = -99999;
  public static boolean useNet       = false;
  
  public PortIF ports[]              = new PortIF[N+1];
  public int w[][]                   = new int[N+1][N+1];
  public String hosts[]              = new String[N+1];
  public int portNums[]              = new int[N+1];
  private String localHost;
  public NetGraph() {
    localHost = getLocalHost(); 
    initIP();
    initPortNum();
    initWeights();
    initPorts();
    pause(); 
  }
  public String getLocalHost() {
  String s = "UNKNOWN";
    if (useNet)
      try {
        InetAddress inet = InetAddress.getLocalHost();
        s = inet.getHostName(); 
        System.out.println("LocalHost: "+s);
      } catch (Exception e) {}
    return s;
  }
  private void initIP() {
    //hosts[1] = "computer1";  // hosts[1] = localHost;  for home PC
    //hosts[2] = "computer2";
    //hosts[3] = "computer3";
    //hosts[4] = "computer4";
    //hosts[5] = "computer5";
    //hosts[6] = "computer6";
    hosts[1] = "gold";
    hosts[2] = "gold";
    hosts[3] = "gold";
    hosts[4] = "gold";
    hosts[5] = "gold";
    hosts[6] = "gold";
  }
  private void initPortNum() {
    for (int i=1; i<=N; i++)
      portNums[i] = nextPort++;
  }
  private void initWeights() {
    for (int i=1; i<=N; i++)
      for (int j=1; j<=N; j++)
        w[i][j] = INF;

    w[1][2] = 7; w[2][1] = 7; w[1][3] = 0; w[3][1] = 0; w[1][4] = 6;
    w[4][1] = 6; w[2][3] = 4; w[3][2] = 4; w[2][5] = 2; w[5][2] = 2;
    w[3][4] = 5; w[4][3] = 5; w[3][6] = 3; w[6][3] = 3; w[4][6] = 1;
    w[6][4] = 1; w[5][6] = 8; w[6][5] = 8; 
  }
  private void initPorts() {
    for (int i=1; i<=N; i++)
      if (useNet)
        ports[i] = new NetPort("NetPort"+i,hosts[i],portNums[i]);
      else
        ports[i] = new Port("Port"+i);
  }
  public boolean isLocal(int i) {
    if (useNet)
      return (localHost.equals(hosts[i]));
    else
      return true;
  }
  private void pause() {
    if (useNet) {
      System.out.println("Type <Return> after all network systems are up.");
      try {
        int i = System.in.read();
      } catch (Exception e) {}
    }
  }
  public static String encode(String s, int i) {
    return (s+i+",");
  }
  public static int decode(String s, int index) {
  int count=0;
  int lastindex = 0;
  int nextindex, result;
    while (true) {
      nextindex = s.indexOf(',',lastindex);
      if (nextindex < 0)
        return DECODE_ERR;
      else 
        if (count==index) {
          try {
            String substr = s.substring(lastindex,nextindex); 
            result = Integer.parseInt(substr);
          } catch (Exception e) {result = DECODE_ERR;}
          return result;
        }
        else {
          count++;
          lastindex = nextindex+1;
        }
    } 
  }
}