package ch.ffhs.webE.action;

import java.util.ArrayList;
import java.util.List;

import javax.servlet.http.HttpServletRequest;

import org.apache.struts2.StrutsStatics;

import ch.ffhs.webE.dao.UserDAOImpl;
import ch.ffhs.webE.domain.User;

import com.opensymphony.xwork2.Action;
import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;

public class UserAction extends ActionSupport implements ModelDriven<User>
{

  private static final long serialVersionUID = 1L;

  private User user = new User();
  private List<User> userList = new ArrayList<User>();
  private final UserDAOImpl userDAO = new UserDAOImpl();

  @Override
  public User getModel()
  {
    return this.user;
  }

  /**
   * Executes the DB query to save the user
   * 
   * @return
   */
  public String addOrUpdate()
  {
    this.userDAO.saveOrUpdateUser(this.user);
    return Action.SUCCESS;
  }

  /**
   * DB query for userList
   * 
   * @return SUCCESS
   */
  public String list()
  {
    this.userList = this.userDAO.listUser();
    return Action.SUCCESS;
  }

  public String edit()
  {
    int id = this.getIdParameter();

    if (id > 0)
    {
      this.user = this.userDAO.listUserById(id);
      return Action.SUCCESS;
    }
    else
    {
      return Action.ERROR;
    }
  }

  /**
   * Gets the ID Parameter for update / delete requests
   * 
   * @return int from the ID request. If not set or wrong, it gives back -1
   */
  private int getIdParameter()
  {
    HttpServletRequest request = (HttpServletRequest) ActionContext
        .getContext().get(StrutsStatics.HTTP_REQUEST);

    int id = -1;
    try
    {
      id = Integer.parseInt(request.getParameter("id"));
    }
    catch (Exception e)
    {
      // TODO: Logging - wrong parameter set
    }

    return id;
  }

  /**
   * deletes a user, gets the ID from the "id" parameter that was submitted with
   * the HTTP request
   * 
   * @return String - either SUCCESS or ERROR constant
   */
  public String delete()
  {

    int id = this.getIdParameter();

    // Check for malicious ID values
    if (id > 0)
    {
      this.userDAO.deleteUser(id);
      return Action.SUCCESS;
    }
    else
    {
      return Action.ERROR;
    }
  }

  /*
   * Standard getters and setters
   */

  public User getUser()
  {
    return this.user;
  }

  public void setUser(User user)
  {
    this.user = user;
  }

  public List<User> getUserList()
  {
    return this.userList;
  }

  public void setUserList(List<User> userList)
  {
    this.userList = userList;
  }
}