package scotlandyard.servlets.players;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import scotlandyard.engine.impl.Engine;
import scotlandyard.engine.spec.IGame;
import scotlandyard.engine.spec.IPlayer;
/**
* used to show the transport options a
* player can choose before making a
* descision to move to another node on the map
* @author Hussain Al-Mutawa
* @version 3.0
*/
public class show_transport_options extends HttpServlet {
private static final long serialVersionUID = 2080719957137633116L;
private String selected_game,xhash;
private Integer node;
public show_transport_options() {
super();
}
public show_transport_options(String selected_game,String xhash,Integer node) {
super();
this.node=node;
this.xhash=xhash;
this.selected_game=selected_game;
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
final PrintWriter out = response.getWriter();
try{
if(request.getParameter("xhash")!=null){
xhash = request.getParameter("xhash");
}
if(xhash==null || "".equals(xhash)){throw new Exception("HASH is unknow");}
if(request.getParameter("newPosition")!=null){
node = Integer.parseInt(request.getParameter("newPosition"));
}
if(node==null || "".equals(node)){throw new Exception("node is unknow");}
if(request.getParameter("selected_game")!=null){
selected_game = request.getParameter("selected_game");
}
if(selected_game==null || "".equals(selected_game)){throw new Exception("Game id is missing");}
final IGame game = Engine.instance().games.get(selected_game);
if(game==null){throw new Exception("GAME is unknow");}
final IPlayer player = game.getPlayer(xhash);
if(player==null){throw new Exception("UNKNOWN Player");}
final Integer[]legalMoves = game.getLegalMoves(player.getEmail());
int transports = legalMoves[node];
out.println("<div class='transport_options'>");
transports = showTransportButton(out,transports,16);
transports = showTransportButton(out,transports,8);
transports = showTransportButton(out,transports,4);
transports = showTransportButton(out,transports,2);
transports = showTransportButton(out,transports,1);
if(transports>0){
throw new Exception("tansport type for this node excede the expected limit");
}
out.println("</div>");
}catch(Exception e){
out.print("{\"msg\" : \"EXCEPTION : "+(e.getMessage()+"").replace("\"", "'")+"\", \"className\" : \""+getClass().getName()+"\"}");
}
}
private int showTransportButton(final PrintWriter out,final int transports,final int n){
int result = transports;
if(transports>=n){
out.println("<button style='height:60px' onclick='set_transport("+log2(n)+")'><img src='http://scotlandyard.comule.com/get_icon.php?icon="+n+"'/></button>");
result-=n;
}
return result;
}
private int log2(final int n){
return (int) (Math.log(n)/Math.log(2));
}
}