package web_projekt;

import java.util.List;

import javax.ejb.EJB;
import javax.faces.application.FacesMessage;
import javax.faces.bean.ManagedBean;
import javax.faces.context.FacesContext;
import javax.servlet.http.HttpSession;

import projekt.dao.UserDAO;
import projekt.entities.User;


@ManagedBean
public class LoginBB {
    private static final String PAGE_MAIN = "taskList?faces-redirect=true";
    private static final String PAGE_LOGIN = "login";
    private static final String PAGE_STAY = null;

    private String login;
    private String password;

    @EJB
    UserDAO userDAO;

    public String getLogin() {
        return login;
    }

    public void setLogin(String login) {
        this.login = login;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public boolean validateData() {
        boolean result = true;
        FacesContext ctx = FacesContext.getCurrentInstance();

        if (login == null || login.length() == 0) {
            ctx.addMessage(null, new FacesMessage(FacesMessage.SEVERITY_ERROR, "Podaj login", "null"));
        }

        if (password == null || password.length() == 0) {
            ctx.addMessage(null, new FacesMessage(FacesMessage.SEVERITY_ERROR, "Podaj hasło", "null"));
        }

        if (!ctx.getMessageList().isEmpty()) {
            result = false;
        }

        return result;
    }

    public String doLogin() {
        FacesContext ctx = FacesContext.getCurrentInstance();
        User user = null;

        if (!validateData()) {
            return PAGE_STAY;
        }

        if (login.length() < 1) {
            ctx.addMessage(null, new FacesMessage(
                    FacesMessage.SEVERITY_ERROR, "NIE MA LOGINU", null
                    ));
            return PAGE_STAY;
        }
        if (password.length() < 1) {
            ctx.addMessage(null, new FacesMessage(
                    FacesMessage.SEVERITY_ERROR, "NIE MA HASŁA", null
                    ));
            return PAGE_STAY;
        }

        user = getUserFromDB(login, password);

        if (user == null) {
            ctx.addMessage(null, new FacesMessage(
                    FacesMessage.SEVERITY_ERROR, "Niepoprawne dane logowania.", null
                    ));

            return PAGE_STAY;
        }

        HttpSession session = (HttpSession) ctx.getExternalContext().getSession(true);
        session.setAttribute("userSession", user);

        return PAGE_MAIN;
    }

    public User getUser() {
        HttpSession session = (HttpSession)
                FacesContext.getCurrentInstance().getExternalContext().getSession(true);

        return (User) session.getAttribute("userSession");
    }

    public String doLogout() {
        HttpSession session = (HttpSession)
                FacesContext.getCurrentInstance().getExternalContext().getSession(true);
        session.invalidate();

        return PAGE_LOGIN;
    }

    public User getUserFromDB(String login, String password) {
        List<User> users = userDAO.getFullList();
        User user = null;

        for (User list_user : users) {
            if ((list_user.getLoginUser().equals(login))
                    && list_user.getPasswordUser().equals(password)) {
                user = list_user;
            }
        }

        return user;
    }
}