package servlets.admin.userManagement;

import dbProcs.Setter;
import jakarta.servlet.ServletException;
import jakarta.servlet.http.Cookie;
import jakarta.servlet.http.HttpServlet;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import jakarta.servlet.http.HttpSession;
import java.io.IOException;
import java.io.PrintWriter;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.owasp.encoder.Encode;
import utils.ShepherdLogManager;
import utils.Validate;

/**
 * The control class of the Create New Administrator functionality. <br>
 * <br>
 * This file is part of the Security Shepherd Project.
 *
 * <p>The Security Shepherd project is free software: you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by the Free Software Foundation, either
 * version 3 of the License, or (at your option) any later version.<br>
 *
 * <p>The Security Shepherd project is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
 * PURPOSE. See the GNU General Public License for more details.<br>
 *
 * <p>You should have received a copy of the GNU General Public License along with the Security
 * Shepherd project. If not, see <http://www.gnu.org/licenses/>.
 *
 * @author Mark Denihan
 */
public class CreateNewAdmin extends HttpServlet {

  private static final long serialVersionUID = 1L;
  private static final Logger log = LogManager.getLogger(CreateNewAdmin.class);

  /**
   * Initiated by createNewAdmin.jsp. This method adds administrators to the system if valid data is
   * submitted, otherwise no admin will be added to the database. Email is gathered for future
   * functionality. Adding of the player to the core database is handed by Setter.playerCreate
   *
   * @param userName User's User Name
   * @param passWord User's Password
   * @param passWordConfirm Password Confirmation
   * @param userAddress User's Email
   * @param userAddressCnf User's Email Confirmation
   * @param csrfToken
   */
  public void doPost(HttpServletRequest request, HttpServletResponse response)
      throws ServletException, IOException {
    // Setting IpAddress To Log and taking header for original IP if forwarded from proxy
    ShepherdLogManager.setRequestIp(request.getRemoteAddr(), request.getHeader("X-Forwarded-For"));
    log.debug("*** servlets.Admin.createNewAdmin ***");

    PrintWriter out = response.getWriter();
    out.print(getServletInfo());
    request.setCharacterEncoding("UTF-8");
    HttpSession ses = request.getSession(true);
    Cookie tokenCookie = Validate.getToken(request.getCookies());
    Object tokenParmeter = request.getParameter("csrfToken");
    if (Validate.validateAdminSession(ses, tokenCookie, tokenParmeter)) {
      ShepherdLogManager.setRequestIp(
          request.getRemoteAddr(),
          request.getHeader("X-Forwarded-For"),
          ses.getAttribute("userName").toString());
      if (Validate.validateTokens(tokenCookie, tokenParmeter)) {
        boolean notNull = false;
        boolean notEmpty = false;
        boolean validPasswords = false;
        boolean validAddress = false;
        boolean userValidate = false;
        try {
          log.debug("Getting ApplicationRoot");
          String ApplicationRoot = getServletContext().getRealPath("");
          log.debug("Servlet root = " + ApplicationRoot);

          log.debug("Getting Parameters");
          String userName = (String) request.getParameter("userName");
          log.debug("userName = " + userName);
          String passWord = (String) request.getParameter("passWord");
          log.debug("passWord retrieved");
          String passWordConfirm = (String) request.getParameter("passWordConfirm");
          log.debug("passWordConfirm retrieved");
          String userAddress = Validate.validateParameter(request.getParameter("userAddress"), 128);
          log.debug("userAddress = " + userAddress);
          String userAddressCnf =
              Validate.validateParameter(request.getParameter("userAddressCnf"), 128);
          log.debug("userAddressCnf = " + userAddressCnf);

          // Validation
          log.debug("String Casting should have set off any null alarms... Checking again anyway");
          notNull = (userName != null && passWord != null);
          log.debug("Ensuring strings are not empty");
          notEmpty = (!userName.isEmpty() && !passWord.isEmpty());
          log.debug("Validating passwords");
          validPasswords = passWord.compareTo(passWordConfirm) == 0; // 0 returned if the same
          log.debug("Validating addresses");
          if (userAddress.isEmpty()) {
            validAddress = true;
          } else {
            validAddress = userAddress.compareTo(userAddressCnf) == 0;
            validAddress = (Validate.isValidEmailAddress(userAddress) && validAddress);
          }
          boolean basicValidation = validPasswords && validAddress && notNull && notEmpty;
          if (basicValidation) {
            userValidate = (Validate.isValidUser(userName, passWord, userAddress));
          }
          if (basicValidation && userValidate) {
            // Data is good, Add user
            log.debug("Adding player to database, with null classId");
            Setter.userCreate(
                ApplicationRoot, null, userName, passWord, "admin", userAddress, true);
            if (userAddress.isEmpty()) {
              userAddress = "blank"; // For Output Message
            }
            String reponseMessage =
                "<a>"
                    + Encode.forHtml(userName)
                    + "</a> created successfully with email address "
                    + Encode.forHtml(userAddress);
            out.print("<h3 class=\"title\">Admin Created</h3>" + "<p>" + reponseMessage + "<p>");
          } else {
            // Validation Error Responses
            String errorMessage = "An Error Occurred: ";
            if (!notNull || !notEmpty) {
              log.error("Null values detected");
              errorMessage += "Invalid Request. Please try again";
            } else if (!validPasswords) {
              log.error("Passwords did not match");
              errorMessage += "Password fields did not match";
            } else if (!validAddress) {
              log.error("Invalid Addresses Detected");
              errorMessage += "Invalid Addresses Detected";
            } else if (!userValidate) {
              log.warn(
                  "Server-side user validation failed for new admin (username length="
                      + userName.length()
                      + ", password length="
                      + passWord.length()
                      + ", address length="
                      + userAddress.length()
                      + "); expected: username 3-32 chars, password 8-512 chars, address <=128"
                      + " chars");
              errorMessage += "Invalid Request. Please try again";
            }
            out.print(
                "<h3 class=\"title\">Admin Create Failure</h3>"
                    + "<p><font color=\"red\">"
                    + Encode.forHtml(errorMessage)
                    + "</font><p>");
          }
        } catch (Exception e) {
          log.error("Create New Admin Error: " + e.toString());
          out.print(
              "<h3 class=\"title\">Admin Create Failure</h3>"
                  + "<p>"
                  + "<font color=\"red\">An error Occurred! Please try again.</font>"
                  + "<p>");
        }
      } else {
        log.debug("CSRF tokens did not match");
        out.print(
            "<h3 class=\"title\">Admin Create Failure</h3>"
                + "<p>"
                + "<font color=\"red\">An error Occurred! CSRF Tokens did not match.</font>"
                + "<p>");
      }
    } else {
      out.print(
          "<h3 class=\"title\">Admin Create Failure</h3><p><font color=\"red\">An error Occurred!"
              + " Please try non administrator functions!</font><p>");
    }
    log.debug("*** createNewAdmin END ***");
  }
}