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package action;

import dominio.Funcionario;
import java.security.InvalidParameterException;
import java.util.ArrayList;
import java.util.List;
import javax.security.auth.login.LoginException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.hibernate.criterion.Restrictions;
import util.DaoFactory;
import util.GenericDao;

/**
 *
 * @author higor
 */
public class LoginFuncionario extends org.apache.struts.action.Action {

    private static final String SUCCESS = "index";
    private static final String FAILURE = "login";

    /**
     * This is the action called from the Struts framework.
     * @param mapping The ActionMapping used to select this instance.
     * @param form The optional ActionForm bean for this request.
     * @param request The HTTP Request we are processing.
     * @param response The HTTP Response we are processing.
     * @throws java.lang.Exception
     * @return
     */
    @Override
    public ActionForward execute(ActionMapping mapping, ActionForm form,
                    HttpServletRequest request, HttpServletResponse response)
                    throws Exception {

        HttpSession session = request.getSession();

        List<String> erros = new ArrayList<String>();

        GenericDao<Funcionario> funcionarioDao = DaoFactory.getFuncionarioDao();

        try {
            if (request.getParameter("email") == null || request.getParameter("senha") == null) {
                throw new InvalidParameterException();
            }

            String email = request.getParameter("email");
            Integer senha = Integer.parseInt(request.getParameter("senha"));

            funcionarioDao.beginTransaction();

            Funcionario f = (Funcionario) funcionarioDao.createCriteria()
                            .add(Restrictions.eq("email", email))
                            .uniqueResult();


            if (f.getSenha() != senha) {
                throw new LoginException();
            }

            session.setAttribute("usuario", f);
            session.setAttribute("funcionario", true);

            funcionarioDao.commit();

        } catch (NumberFormatException e) {
            erros.add("A senha digitada não é um número.");
        } catch (InvalidParameterException e) {
            erros.add("Por favor preencha todos os campos.");
        } catch (NullPointerException e) {
            erros.add("Usuário desconhecido.");
            System.err.println(e);
        } catch (LoginException e) {
            erros.add("Senha incorreta.");
        }  finally {
            funcionarioDao.close();
        }

        if (erros.isEmpty()) {
            session.setAttribute("erro_func", null);
            return mapping.findForward(SUCCESS);
        } else {
            session.setAttribute("erro_func", erros);
            return mapping.findForward(FAILURE);
        }

    }
}