package com.aestasit.gwtibatis.server.handlers;

import javax.naming.NamingException;
import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;

import org.springframework.beans.factory.annotation.Autowired;

import com.aestasit.gwtibatis.Client;
import com.aestasit.gwtibatis.UserService;
import com.aestasit.gwtibatis.UserServiceRemote;
import com.aestasit.gwtibatis.exceptions.AuthenticationException;
import com.aestasit.gwtibatis.model.User;
import com.aestasit.gwtibatis.shared.LoginAction;
import com.aestasit.gwtibatis.shared.LoginActionResult;
import com.aestasit.gwtibatis.shared.sec.CurrentUser;
import com.gwtplatform.dispatch.server.ExecutionContext;
import com.gwtplatform.dispatch.server.actionhandler.AbstractActionHandler;
import com.gwtplatform.dispatch.shared.ActionException;

public class LoginHandler extends
		AbstractActionHandler<LoginAction, LoginActionResult> {

	@Autowired
	private ServletContext servletContext;

	@Autowired
	private UserService userService;

	@Autowired
	private HttpServletRequest servletRequest;

	public LoginHandler() {
		super(LoginAction.class);
	}

	@Override
	public LoginActionResult execute(LoginAction action,
			ExecutionContext context) throws ActionException {

		String username = action.getUsername();
		String password = action.getPassword();
		LoginActionResult result = null;
		User u = null;
		if (!action.getEjb()) {

			try {
				u = userService.login(username, password);

			} catch (AuthenticationException ae) {
				result = new LoginActionResult(null);
			}
		} else {
			try {
				UserServiceRemote bean = (UserServiceRemote) new Client()
						.getContext()
						.lookup("gwtbatis-ear/gwtibatis-ejb/UserServiceEJB!com.aestasit.gwtibatis.UserServiceRemote");
				u = bean.login(username, password);
			} catch (NamingException e) {
				result = new LoginActionResult(null);
			} catch (AuthenticationException ae) {
				result = new LoginActionResult(null);
			}

		}
		if(u!=null){
			HttpSession s = servletRequest.getSession(true);
			s.setAttribute("currentUserName", u.getUsername());
			CurrentUser cu = new CurrentUser();
			cu.setUsername(u.getUsername());
			cu.setId(u.getId());
			cu.setEmail(u.getEmail());
			result = new LoginActionResult(cu);
		}
		return result;
	}

	@Override
	public Class<LoginAction> getActionType() {
		return LoginAction.class;
	}

	@Override
	public void undo(LoginAction action, LoginActionResult result,
			ExecutionContext context) throws ActionException {
		// Not undoable
	}

}