package eu.dnetlib.openaire.usermanagement;

import eu.dnetlib.openaire.user.utils.EmailSender;
import eu.dnetlib.openaire.user.utils.LDAPActions;
import eu.dnetlib.openaire.user.utils.VerificationActions;
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;
import java.sql.Timestamp;
import java.util.Date;
import java.util.UUID;

/**
 * Created by sofia on 20/10/2017.
 */
public class RegisterServlet extends HttpServlet {

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

    @Autowired
    private VerificationActions verificationActions;

    @Autowired
    private EmailSender emailSender;

    @Autowired
    private LDAPActions ldapActions;

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

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

        String firstName = request.getParameter("first_name");
        String lastName = request.getParameter("last_name");
        String organization = request.getParameter("organization");
        String username = request.getParameter("username");
        String email =request.getParameter("email");
        String confirmEmail = request.getParameter("email_conf");
        //String password = request.getParameter("password");
        //String confirmPassword = request.getParameter("password_conf");

        if (organization == null){
            logger.info("organization is null");
        }
        if (firstName != null && lastName != null &&  username != null &&
                email.equals(confirmEmail) /*&& password.equals(confirmPassword)*/ ) {

            try {

//                if (ldapActions.usernameExists(username)) {
//                    request.getSession().setAttribute("username_message", "Username already exists! Choose another one.");
//                    logger.info("Username already exists");
//                    response.sendRedirect("./register.jsp");
//
//                } else if (ldapActions.emailExists(email)) {
//                    request.getSession().setAttribute("email_message", "There is another user with this email.");
//                    logger.info("There is another user with this email");
//                    response.sendRedirect("./register.jsp");
//
//                } else {

                 if (username.matches("^[a-zA-Z0-9][a-zA-Z0-9_-]{4,150}") && !ldapActions.usernameExists(username) && !ldapActions.emailExists(email)) {

                     ldapActions.createUser(username, email, firstName, lastName, organization/*, password*/);
                     logger.info("User successfully created");

                     UUID verificationCode = UUID.randomUUID();
                     Date creationDate = new Date();

                     Timestamp timestamp = new Timestamp(creationDate.getTime());

                     if (!verificationActions.verificationEntryExists(username)) {
                         verificationActions.addVerificationEntry(username, verificationCode.toString(), timestamp);

                     } else {
                         verificationActions.updateVerificationEntry(username, verificationCode.toString(), timestamp);
                     }

                     String verificationCodeMsg = "Hello " + username + ",\n" +
                             "\n" +
                             "A request has been made to verify your email and activate your OpenAIRE account. To activate your\n" +
                             "account, you will need to submit your username and this activation code in order to verify that the\n" +
                             "request was legitimate.\n" +
                             "\n" +
                             "The activation code is " + verificationCode.toString() + "\n Thank you";

                     String verificationCodeSubject = "Activate your OpenAIRE account";

                     emailSender.sendEmail(email, verificationCodeSubject, verificationCodeMsg);


                     response.sendRedirect("./activate.jsp");
//                }
                 } else {

                     if(!username.matches("^[a-zA-Z0-9][a-zA-Z0-9_-]{4,150}")){

                         if (username.length() < 5) {
                             request.getSession().setAttribute("username_message", "Minimum username length 5 characters.");
                             logger.info("Minimum username length 5 characters.");
                         }

                         if (username.length() > 150) {
                             request.getSession().setAttribute("username_message", "Maximum username lenght 150 characters.");
                             logger.info("Maximum username lenght 150 characters.");
                         }
                     }

                     if (ldapActions.usernameExists(username)) {
                        request.getSession().setAttribute("username_message", "Username already exists! Choose another one.");
                        logger.info("Username already exists");
                     }

                     if (ldapActions.emailExists(email)) {
                         request.getSession().setAttribute("email_message", "There is another user with this email.");
                         logger.info("There is another user with this email");
                     }

                     response.sendRedirect("./register.jsp");
                 }


            } catch (Exception e) {
                logger.error("LDAP error in creating user", e);
                response.sendRedirect("./error.jsp");
            }
        }
        printWriter.close();

    }
}