import java.util.ArrayList;
import java.util.Collection;
import java.util.EnumSet;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.actions.DispatchAction;
import org.w3c.dom.Document;

import com.google.code.facebookapi.FacebookException;
import com.google.code.facebookapi.FacebookXmlRestClient;
import com.google.code.facebookapi.ProfileField;

public class FacebookConnectAction extends DispatchAction {	
		
	private String apiKey = "123";
	private String secretToken = "456";
	
	public ActionForward index(
			ActionMapping mapping,
			ActionForm form,
			HttpServletRequest request,
			HttpServletResponse response){	

		FacebookXmlRestClient client = 
			new FacebookXmlRestClient (apiKey, secretToken);		    
		String url = "http://www.facebook.com/login.php?api_key=" + apiKey + "&v=1.0";		
		request.setAttribute("facebookUrl", url);
			
		return mapping.findForward("index");
	}
	
	public ActionForward login(
			ActionMapping mapping,
			ActionForm form,
			HttpServletRequest request,
			HttpServletResponse response){		
		
		try {			
			FacebookXmlRestClient client = 
				new FacebookXmlRestClient(apiKey, secretToken);
			String authToken = request.getParameter("auth_token");
			client.auth_getSession(authToken);
			
			long myid = client.users_getLoggedInUser();
			Collection<Long> users = new ArrayList<Long>();
			users.add(myid);
			EnumSet<ProfileField> fields = 
				EnumSet.of(ProfileField.NAME, 
						ProfileField.PIC);
			
			Document d = client.users_getInfo(users, fields);
			String myname = 
				d.getElementsByTagName("name").item(0).getTextContent();
			String pic = 
				d.getElementsByTagName("pic").item(0).getTextContent();
			
			System.out.println("Name: " + myname);
			System.out.println("Pic: " + pic);
		} catch (FacebookException e) {
			e.printStackTrace();
		}
			
		return mapping.findForward("login");
	}
	
}