package eu.dnetlib.openaire.usermanagement;

import eu.dnetlib.openaire.user.utils.InputValidator;
import eu.dnetlib.openaire.user.utils.LDAPActions;
import eu.dnetlib.openaire.user.utils.VerificationActions;
import eu.dnetlib.openaire.usermanagement.utils.UrlConstructor;
import org.apache.log4j.Logger;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.context.support.SpringBeanAutowiringSupport;

import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;

/**
 * Created by sofia on 21/5/2018.
 */
public class VerifyToDeleteServlet extends HttpServlet {

    public void init(ServletConfig config) throws ServletException {
        super.init(config);
        SpringBeanAutowiringSupport.processInjectionBasedOnServletContext(this,
                config.getServletContext());
    }

    @Autowired
    private VerificationActions verificationActions;

    @Autowired
    private LDAPActions ldapActions;

    private Logger logger = Logger.getLogger(VerificationCodeServlet.class);

    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws IOException {
        response.setContentType("text/html");
        PrintWriter printWriter = response.getWriter();

        String formUsername = request.getParameter("username").trim();
        String formVerificationCode = request.getParameter("verification_code").trim();

        try {
            if (InputValidator.isFilled(formUsername) && InputValidator.isFilled(formVerificationCode)) {
                if (verificationActions.verificationEntryExists(formUsername) && verificationActions.verificationCodeIsCorrect(formUsername, formVerificationCode)) {
                    if (!verificationActions.verificationCodeHasExpired(formUsername)) {

                        Boolean isRegistered = false;
                        Boolean isZombie = false;

                        if (ldapActions.usernameExists(formUsername)) {
                            logger.info("User " + formUsername + " is activated user!");
                            isRegistered = true;
                        } else if (ldapActions.isZombieUsersUsername(formUsername)) {
                            logger.info("User " + formUsername + " is zombie user!");
                            isZombie = true;
                        }

                        if (!isRegistered && !isZombie) {
                            request.getSession().setAttribute("message", "Username or verification code are not valid.");
                            response.sendRedirect("./verifyToDelete.jsp");
                        } else {
                            if (isRegistered) {
                                ldapActions.deleteUser(formUsername);
                            } else if (isZombie) {
                                ldapActions.deleteZombieUser(formUsername);
                            }
                            verificationActions.deleteVerificationEntry(formUsername);
                            response.sendRedirect(UrlConstructor.getRedirectUrl(request,"successDeleteAccount.jsp"));

                        }
                    } else {
                        logger.info("Verification code has expired!");
                        response.sendRedirect(UrlConstructor.getRedirectUrl(request, "expiredVerificationCode.jsp"));
                    }
                } else {
                    logger.info("Username or verification code are not valid!");
                    request.getSession().setAttribute("message", "Username or verification code are not valid.");
                    response.sendRedirect("./verifyToDelete.jsp");
                }
            } else {
                if (!InputValidator.isFilled(formUsername)) {
                    logger.info("No username");
                    request.getSession().setAttribute("msg_username_error", "Please enter your username.");
                }
                if (!InputValidator.isFilled(formVerificationCode)) {
                    logger.info("No verification code");
                    request.getSession().setAttribute("msg_verification_code_error", "Please enter your verification code.");
                }
                response.sendRedirect("./verifyToDelete.jsp");
            }
        } catch (Exception ldape) {
            logger.error("Could not remove user with username " + formUsername, ldape);
            response.sendRedirect(UrlConstructor.getRedirectUrl(request, "error.jsp"));
        }

        printWriter.close();
    }
}