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package com.spice.profitmandi.web.controller;import java.time.LocalDateTime;import java.time.format.DateTimeFormatter;import java.util.ArrayList;import java.util.Collections;import java.util.List;import javax.mail.internet.InternetAddress;import javax.mail.internet.MimeMessage;import javax.servlet.http.HttpServletRequest;import org.apache.logging.log4j.LogManager;import org.apache.logging.log4j.Logger;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.http.MediaType;import org.springframework.http.ResponseEntity;import org.springframework.mail.javamail.JavaMailSender;import org.springframework.mail.javamail.MimeMessageHelper;import org.springframework.stereotype.Controller;import org.springframework.transaction.annotation.Transactional;import org.springframework.web.bind.annotation.PathVariable;import org.springframework.web.bind.annotation.RequestBody;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestMethod;import org.springframework.web.bind.annotation.RequestParam;import com.spice.profitmandi.common.model.ProfitMandiConstants;import com.spice.profitmandi.common.model.UserInfo;import com.spice.profitmandi.common.web.util.ResponseSender;import com.spice.profitmandi.dao.entity.auth.AuthUser;import com.spice.profitmandi.dao.entity.dtr.User;import com.spice.profitmandi.dao.enumuration.cs.EscalationType;import com.spice.profitmandi.dao.repository.auth.AuthRepository;import com.spice.profitmandi.dao.entity.dtr.Retailer;import com.spice.profitmandi.dao.entity.fofo.FofoStore;import com.spice.profitmandi.dao.entity.cs.CallbackRequestReply;import com.spice.profitmandi.dao.repository.cs.CallbackRequestReplyRepository;import com.spice.profitmandi.dao.repository.cs.CallbackRequestRepository;import com.spice.profitmandi.dao.repository.cs.CsService;import com.spice.profitmandi.dao.repository.dtr.FofoStoreRepository;import com.spice.profitmandi.dao.repository.dtr.RetailerRepository;import com.spice.profitmandi.dao.repository.dtr.UserRepository;import com.spice.profitmandi.web.req.CallbackReplyRequest;import com.spice.profitmandi.web.req.CallbackRequest;import com.spice.profitmandi.web.req.ResolveCallbackRequest;import com.spice.profitmandi.web.res.AssignedRequestResponse;import com.spice.profitmandi.web.res.CallbackReplyResponse;import com.spice.profitmandi.web.res.CallbackRequestResponse;import com.spice.profitmandi.web.res.SupportTeamResponse;import com.spice.profitmandi.web.res.SupportTeamResponse.ContactDetail;import io.swagger.annotations.ApiImplicitParam;import io.swagger.annotations.ApiImplicitParams;import io.swagger.annotations.ApiOperation;@Controller@Transactional(rollbackFor = Throwable.class)public class SupportController {private static final Logger LOGGER = LogManager.getLogger(SupportController.class);@Autowiredprivate ResponseSender<?> responseSender;@Autowiredprivate CsService csService;@Autowiredprivate AuthRepository authRepository;@Autowiredprivate UserRepository userRepository;@Autowiredprivate JavaMailSender mailSender;@Autowiredprivate CallbackRequestRepository callbackRequestRepository;@Autowiredprivate CallbackRequestReplyRepository callbackRequestReplyRepository;@Autowiredprivate RetailerRepository retailerRepository;@Autowiredprivate FofoStoreRepository fofoStoreRepository;@RequestMapping(value = "/support/team", method = RequestMethod.GET, produces = MediaType.APPLICATION_JSON_VALUE)@ApiImplicitParams({@ApiImplicitParam(name = "Auth-Token", value = "Auth-Token", required = true, dataType = "string", paramType = "header")})@ApiOperation(value = "Get assigned support team for a FOFO store grouped by escalation level")public ResponseEntity<?> getSupportTeam(HttpServletRequest request, @RequestParam(value = "fofoId") int fofoId) throws Throwable {LOGGER.info("Getting support team for fofoId: {}", fofoId);List<SupportTeamResponse> response = new ArrayList<>();// --- LEVEL 1 - IMMEDIATE SUPPORT ---List<ContactDetail> l1Contacts = new ArrayList<>();// RBM = RBM category, L1try {int rbmAuthUserId = csService.getAuthUserId(ProfitMandiConstants.TICKET_CATEGORY_RBM, EscalationType.L1, fofoId);if (rbmAuthUserId > 0) {AuthUser user = authRepository.selectById(rbmAuthUserId);if (user != null) {l1Contacts.add(buildContact(user, "RBM", "#1a7a4c","First point of contact for all queries", true, true, false, true));}}} catch (Exception e) {LOGGER.warn("Could not fetch RBM for fofoId: {}", fofoId, e);}// ABM = SALES category, L1try {int abmAuthUserId = csService.getAuthUserId(ProfitMandiConstants.TICKET_CATEGORY_SALES, EscalationType.L1, fofoId);if (abmAuthUserId > 0) {AuthUser user = authRepository.selectById(abmAuthUserId);if (user != null) {l1Contacts.add(buildContact(user, "ASM", "#1a7a4c","Sales support and regional queries", true, true, false, true));}}} catch (Exception e) {LOGGER.warn("Could not fetch ABM for fofoId: {}", fofoId, e);}if (!l1Contacts.isEmpty()) {response.add(new SupportTeamResponse("LEVEL 1 - IMMEDIATE SUPPORT", l1Contacts));}// --- LEVEL 2 - SPECIALIZED SUPPORT ---List<ContactDetail> l2Contacts = new ArrayList<>();// RBM Manager = RBM category, L2try {int rbmManagerAuthUserId = csService.getAuthUserId(ProfitMandiConstants.TICKET_CATEGORY_RBM, EscalationType.L2, fofoId);if (rbmManagerAuthUserId > 0) {AuthUser user = authRepository.selectById(rbmManagerAuthUserId);if (user != null) {l2Contacts.add(buildContact(user, "RBM MANAGER", "#7c3aed","For escalated regional matters", true, true, false, true));}}} catch (Exception e) {LOGGER.warn("Could not fetch RBM Manager for fofoId: {}", fofoId, e);}// BM = SALES category, L2try {int bmAuthUserId = csService.getAuthUserId(ProfitMandiConstants.TICKET_CATEGORY_SALES, EscalationType.L2, fofoId);if (bmAuthUserId > 0) {AuthUser user = authRepository.selectById(bmAuthUserId);if (user != null) {l2Contacts.add(buildContact(user, "BM", "#1e6091","Handles: Orders, Stock, Schemes", true, true, false, true));}}} catch (Exception e) {LOGGER.warn("Could not fetch BM for fofoId: {}", fofoId, e);}// Finance Partner Mapping Operations = FINANCIAL_SERVICES category, L2try {int affordAuthUserId = csService.getAuthUserId(ProfitMandiConstants.TICKET_CATEGORY_FINANCIAL_SERVICES, EscalationType.L2, fofoId);if (affordAuthUserId > 0) {AuthUser user = authRepository.selectById(affordAuthUserId);if (user != null) {l2Contacts.add(buildContact(user, "Finance Partner Mapping", "#d97706","Credit, payment plans, and operations", false, false, true, false));}}} catch (Exception e) {LOGGER.warn("Could not fetch Finance Partner Mapping Manager for fofoId: {}", fofoId, e);}// Branding Manager = DESIGN category, L1try {int brandingAuthUserId = csService.getAuthUserId(ProfitMandiConstants.TICKET_CATEGORY_DESIGN, EscalationType.L1, fofoId);if (brandingAuthUserId > 0) {AuthUser user = authRepository.selectById(brandingAuthUserId);if (user != null) {l2Contacts.add(buildContact(user, "BRANDING", "#1a7a4c","Brand guidelines and marketing support", false, false, true, false));}}} catch (Exception e) {LOGGER.warn("Could not fetch Branding Manager for fofoId: {}", fofoId, e);}if (!l2Contacts.isEmpty()) {response.add(new SupportTeamResponse("LEVEL 2 - SPECIALIZED SUPPORT", l2Contacts));}// --- LEVEL 3 - ESCALATION ---List<ContactDetail> l3Contacts = new ArrayList<>();// Grievance Manager = LEGAL category, L3try {int grievanceAuthUserId = csService.getAuthUserId(ProfitMandiConstants.TICKET_CATEGORY_CRM, EscalationType.L1, fofoId);if (grievanceAuthUserId > 0) {AuthUser user = authRepository.selectById(grievanceAuthUserId);if (user != null) {l3Contacts.add(buildContact(user, "GRIEVANCE OFFICER", "#dc2626","For unresolved issues & formal complaints", false, false, true, true));}}} catch (Exception e) {LOGGER.warn("Could not fetch Grievance Manager for fofoId: {}", fofoId, e);}if (!l3Contacts.isEmpty()) {response.add(new SupportTeamResponse("LEVEL 3 - ESCALATION", l3Contacts));}return responseSender.ok(response);}@RequestMapping(value = "/support/callback-request", method = RequestMethod.POST, produces = MediaType.APPLICATION_JSON_VALUE)@ApiImplicitParams({@ApiImplicitParam(name = "Auth-Token", value = "Auth-Token", required = true, dataType = "string", paramType = "header")})@ApiOperation(value = "Submit a callback request to a support contact")public ResponseEntity<?> requestCallback(HttpServletRequest request, @RequestBody CallbackRequest callbackRequest) throws Throwable {UserInfo userInfo = (UserInfo) request.getAttribute("userInfo");User user = userRepository.selectById(userInfo.getUserId());LOGGER.info("Callback request from userId: {} to contactId: {} subject: {}",userInfo.getUserId(), callbackRequest.getContactId(), callbackRequest.getSubject());// Save to databasecom.spice.profitmandi.dao.entity.cs.CallbackRequest entity = new com.spice.profitmandi.dao.entity.cs.CallbackRequest();entity.setFofoId(userInfo.getRetailerId());entity.setUserId(userInfo.getUserId());entity.setContactId(callbackRequest.getContactId());entity.setContactName(callbackRequest.getContactName());entity.setContactRole(callbackRequest.getContactRole());entity.setSubject(callbackRequest.getSubject());entity.setMessage(callbackRequest.getMessage());entity.setTiming(callbackRequest.getTiming());entity.setStatus("PENDING");entity.setCreateTimestamp(LocalDateTime.now());entity.setUpdateTimestamp(LocalDateTime.now());callbackRequestRepository.persist(entity);LOGGER.info("Callback request saved with id: {}", entity.getId());String timingLabel = "11-15".equals(callbackRequest.getTiming()) ? "11:00 AM - 3:00 PM" : "3:00 PM - 7:00 PM";// Send email to the support contactAuthUser contactUser = authRepository.selectById(callbackRequest.getContactId());if (contactUser == null || contactUser.getEmailId() == null) {LOGGER.warn("Contact user not found or has no email for contactId: {}", callbackRequest.getContactId());return responseSender.ok(true);}MimeMessage message = mailSender.createMimeMessage();MimeMessageHelper helper = new MimeMessageHelper(message);helper.setSubject("Callback Request: " + callbackRequest.getSubject());String emailContent = "<html>"+ "<body style='font-family: Arial, sans-serif; color: #333;'>"+ "<h2 style='color: #d5282c;'>New Callback Request</h2>"+ "<table style='border-collapse: collapse; width: 100%; max-width: 500px;'>"+ "<tr><td style='padding: 8px; font-weight: bold; color: #555;'>From:</td>"+ "<td style='padding: 8px;'>" + user.getFirstName() + " (" + user.getMobileNumber() + ")</td></tr>"+ "<tr><td style='padding: 8px; font-weight: bold; color: #555;'>Email:</td>"+ "<td style='padding: 8px;'>" + user.getEmailId() + "</td></tr>"+ "<tr><td style='padding: 8px; font-weight: bold; color: #555;'>To:</td>"+ "<td style='padding: 8px;'>" + callbackRequest.getContactName() + " (" + callbackRequest.getContactRole() + ")</td></tr>"+ "<tr><td style='padding: 8px; font-weight: bold; color: #555;'>Subject:</td>"+ "<td style='padding: 8px;'>" + callbackRequest.getSubject() + "</td></tr>"+ "<tr><td style='padding: 8px; font-weight: bold; color: #555;'>Message:</td>"+ "<td style='padding: 8px;'>" + callbackRequest.getMessage() + "</td></tr>"+ "<tr><td style='padding: 8px; font-weight: bold; color: #555;'>Preferred Timing:</td>"+ "<td style='padding: 8px;'>" + timingLabel + "</td></tr>"+ "</table>"+ "<br><p style='color: #999; font-size: 12px;'>This callback request was submitted via the SmartDukaan Support page.</p>"+ "</body></html>";helper.setText(emailContent, true);InternetAddress senderAddress = new InternetAddress("care@smartdukaan.com", "SmartDukaan Support");helper.setFrom(senderAddress);helper.setTo(contactUser.getEmailId());helper.setReplyTo(user.getEmailId());mailSender.send(message);LOGGER.info("Callback request email sent to: {}", contactUser.getEmailId());return responseSender.ok(true);}@RequestMapping(value = "/support/callback-requests", method = RequestMethod.GET, produces = MediaType.APPLICATION_JSON_VALUE)@ApiImplicitParams({@ApiImplicitParam(name = "Auth-Token", value = "Auth-Token", required = true, dataType = "string", paramType = "header")})@ApiOperation(value = "Get callback requests for the logged-in fofo associate")public ResponseEntity<?> getCallbackRequests(HttpServletRequest request) throws Throwable {UserInfo userInfo = (UserInfo) request.getAttribute("userInfo");int fofoId = userInfo.getRetailerId();LOGGER.info("Getting callback requests for fofoId: {}", fofoId);List<com.spice.profitmandi.dao.entity.cs.CallbackRequest> callbackRequests = callbackRequestRepository.selectAllByFofoId(fofoId);List<CallbackRequestResponse> responseList = new ArrayList<>();DateTimeFormatter formatter = DateTimeFormatter.ofPattern("dd MMM yyyy, hh:mm a");for (com.spice.profitmandi.dao.entity.cs.CallbackRequest entity : callbackRequests) {CallbackRequestResponse res = new CallbackRequestResponse();res.setId(entity.getId());res.setContactId(entity.getContactId());res.setContactName(entity.getContactName());res.setContactInitials(getInitials(entity.getContactName()));res.setContactRole(entity.getContactRole());res.setSubject(entity.getSubject());res.setMessage(entity.getMessage());res.setTiming(entity.getTiming());res.setTimingLabel("11-15".equals(entity.getTiming()) ? "11:00 AM - 3:00 PM" : "3:00 PM - 7:00 PM");res.setStatus(entity.getStatus());res.setResolutionNotes(entity.getResolutionNotes());res.setReplyCount(callbackRequestReplyRepository.countByCallbackRequestId(entity.getId()));res.setUnread(entity.isUnread());if (entity.getCreateTimestamp() != null) {res.setCreateTimestamp(entity.getCreateTimestamp().format(formatter));}responseList.add(res);}return responseSender.ok(responseList);}@RequestMapping(value = "/support/callback-requests/unread-count", method = RequestMethod.GET, produces = MediaType.APPLICATION_JSON_VALUE)@ApiImplicitParams({@ApiImplicitParam(name = "Auth-Token", value = "Auth-Token", required = true, dataType = "string", paramType = "header")})@ApiOperation(value = "Get count of unread callback requests for the logged-in retailer")public ResponseEntity<?> getUnreadCount(HttpServletRequest request) throws Throwable {UserInfo userInfo = (UserInfo) request.getAttribute("userInfo");int fofoId = userInfo.getRetailerId();LOGGER.info("Getting unread callback request count for fofoId: {}", fofoId);long count = callbackRequestRepository.countUnreadByFofoId(fofoId);return responseSender.ok(count);}@RequestMapping(value = "/support/callback-requests/mark-read", method = RequestMethod.POST, produces = MediaType.APPLICATION_JSON_VALUE)@ApiImplicitParams({@ApiImplicitParam(name = "Auth-Token", value = "Auth-Token", required = true, dataType = "string", paramType = "header")})@ApiOperation(value = "Mark all callback requests as read for the logged-in retailer")public ResponseEntity<?> markRequestsAsRead(HttpServletRequest request) throws Throwable {UserInfo userInfo = (UserInfo) request.getAttribute("userInfo");int fofoId = userInfo.getRetailerId();LOGGER.info("Marking all callback requests as read for fofoId: {}", fofoId);callbackRequestRepository.markAllReadByFofoId(fofoId);return responseSender.ok(true);}@RequestMapping(value = "/support/assigned-requests", method = RequestMethod.GET, produces = MediaType.APPLICATION_JSON_VALUE)@ApiImplicitParams({@ApiImplicitParam(name = "Auth-Token", value = "Auth-Token", required = true, dataType = "string", paramType = "header")})@ApiOperation(value = "Get callback requests assigned to the logged-in internal user")public ResponseEntity<?> getAssignedRequests(HttpServletRequest request) throws Throwable {UserInfo userInfo = (UserInfo) request.getAttribute("userInfo");int contactId = userInfo.getUserId();LOGGER.info("Getting assigned requests for contactId: {}", contactId);List<com.spice.profitmandi.dao.entity.cs.CallbackRequest> callbackRequests = callbackRequestRepository.selectAllByContactId(contactId);List<AssignedRequestResponse> responseList = new ArrayList<>();DateTimeFormatter formatter = DateTimeFormatter.ofPattern("dd MMM yyyy, hh:mm a");for (com.spice.profitmandi.dao.entity.cs.CallbackRequest entity : callbackRequests) {AssignedRequestResponse res = new AssignedRequestResponse();res.setId(entity.getId());res.setSubject(entity.getSubject());res.setMessage(entity.getMessage());res.setTiming(entity.getTiming());res.setTimingLabel("11-15".equals(entity.getTiming()) ? "11:00 AM - 3:00 PM" : "3:00 PM - 7:00 PM");res.setStatus(entity.getStatus());res.setResolutionNotes(entity.getResolutionNotes());res.setReplyCount(callbackRequestReplyRepository.countByCallbackRequestId(entity.getId()));if (entity.getCreateTimestamp() != null) {res.setCreateTimestamp(entity.getCreateTimestamp().format(formatter));}if (entity.getUpdateTimestamp() != null) {res.setUpdateTimestamp(entity.getUpdateTimestamp().format(formatter));}// Fetch retailer infotry {User retailerUser = userRepository.selectById(entity.getUserId());if (retailerUser != null) {res.setRetailerName(retailerUser.getFirstName());res.setRetailerPhone(retailerUser.getMobileNumber());}} catch (Exception e) {LOGGER.warn("Could not fetch user for userId: {}", entity.getUserId(), e);}// Fetch store infotry {Retailer retailer = retailerRepository.selectById(entity.getFofoId());if (retailer != null) {res.setStoreName(retailer.getName());}FofoStore fofoStore = fofoStoreRepository.selectByRetailerId(entity.getFofoId());if (fofoStore != null) {res.setStoreCode(fofoStore.getCode());}} catch (Exception e) {LOGGER.warn("Could not fetch store info for fofoId: {}", entity.getFofoId(), e);}responseList.add(res);}return responseSender.ok(responseList);}@RequestMapping(value = "/support/assigned-requests/{id}/resolve", method = RequestMethod.PUT, produces = MediaType.APPLICATION_JSON_VALUE)@ApiImplicitParams({@ApiImplicitParam(name = "Auth-Token", value = "Auth-Token", required = true, dataType = "string", paramType = "header")})@ApiOperation(value = "Update status and resolution notes for a callback request")public ResponseEntity<?> resolveAssignedRequest(HttpServletRequest request, @PathVariable("id") int id,@RequestBody ResolveCallbackRequest resolveRequest) throws Throwable {UserInfo userInfo = (UserInfo) request.getAttribute("userInfo");LOGGER.info("Resolving callback request id: {} by userId: {} status: {}", id, userInfo.getUserId(), resolveRequest.getStatus());com.spice.profitmandi.dao.entity.cs.CallbackRequest entity = callbackRequestRepository.selectById(id);if (entity == null) {LOGGER.warn("Callback request not found for id: {}", id);return responseSender.ok(false);}entity.setStatus(resolveRequest.getStatus());entity.setResolutionNotes(resolveRequest.getResolutionNotes());entity.setUpdateTimestamp(LocalDateTime.now());callbackRequestRepository.persist(entity);LOGGER.info("Callback request id: {} resolved with status: {}", id, resolveRequest.getStatus());return responseSender.ok(true);}@RequestMapping(value = "/support/callback-requests/{id}/replies", method = RequestMethod.GET, produces = MediaType.APPLICATION_JSON_VALUE)@ApiImplicitParams({@ApiImplicitParam(name = "Auth-Token", value = "Auth-Token", required = true, dataType = "string", paramType = "header")})@ApiOperation(value = "Get all replies for a callback request")public ResponseEntity<?> getReplies(HttpServletRequest request, @PathVariable("id") int id) throws Throwable {LOGGER.info("Getting replies for callback request id: {}", id);List<CallbackRequestReply> replies = callbackRequestReplyRepository.selectAllByCallbackRequestId(id);Collections.reverse(replies); // oldest first for chat orderList<CallbackReplyResponse> responseList = new ArrayList<>();DateTimeFormatter formatter = DateTimeFormatter.ofPattern("dd MMM yyyy, hh:mm a");for (CallbackRequestReply reply : replies) {CallbackReplyResponse res = new CallbackReplyResponse();res.setId(reply.getId());res.setMessage(reply.getMessage());res.setSenderType(reply.getSenderType());res.setSenderName(reply.getSenderName());if (reply.getCreateTimestamp() != null) {res.setCreateTimestamp(reply.getCreateTimestamp().format(formatter));}responseList.add(res);}return responseSender.ok(responseList);}@RequestMapping(value = "/support/callback-requests/{id}/reply", method = RequestMethod.POST, produces = MediaType.APPLICATION_JSON_VALUE)@ApiImplicitParams({@ApiImplicitParam(name = "Auth-Token", value = "Auth-Token", required = true, dataType = "string", paramType = "header")})@ApiOperation(value = "Add a reply to a callback request")public ResponseEntity<?> addReply(HttpServletRequest request, @PathVariable("id") int id,@RequestBody CallbackReplyRequest replyRequest) throws Throwable {UserInfo userInfo = (UserInfo) request.getAttribute("userInfo");com.spice.profitmandi.dao.entity.cs.CallbackRequest callbackReq = callbackRequestRepository.selectById(id);if (callbackReq == null) {LOGGER.warn("Callback request not found for id: {}", id);return responseSender.ok(false);}// Determine sender type: if userId matches the request creator, it's RETAILER; otherwise INTERNALString senderType = (userInfo.getUserId() == callbackReq.getUserId()) ? "RETAILER" : "INTERNAL";User senderUser = userRepository.selectById(userInfo.getUserId());String senderName = senderUser != null ? senderUser.getFirstName() : "Unknown";LOGGER.info("Adding reply to callback request id: {} by userId: {} senderType: {}", id, userInfo.getUserId(), senderType);CallbackRequestReply reply = new CallbackRequestReply();reply.setCallbackRequestId(id);reply.setMessage(replyRequest.getMessage());reply.setSenderType(senderType);reply.setSenderName(senderName);reply.setSenderId(userInfo.getUserId());reply.setCreateTimestamp(LocalDateTime.now());callbackRequestReplyRepository.persist(reply);// Update the parent request's updateTimestampcallbackReq.setUpdateTimestamp(LocalDateTime.now());// Mark as unread for the retailer when an internal user repliesif ("INTERNAL".equals(senderType)) {callbackReq.setUnread(true);}callbackRequestRepository.persist(callbackReq);LOGGER.info("Reply added with id: {} to callback request id: {}", reply.getId(), id);return responseSender.ok(true);}private ContactDetail buildContact(AuthUser authUser, String badge, String badgeColor,String description, boolean showCall, boolean showMessage,boolean showCallback, boolean expanded) {ContactDetail contact = new ContactDetail();contact.setId(authUser.getId());contact.setName(authUser.getFullName());contact.setInitials(getInitials(authUser.getFirstName(), authUser.getLastName()));contact.setRole(badge);contact.setBadge(badge);contact.setBadgeColor(badgeColor);contact.setDescription(description);contact.setPhone("tel:+91" + authUser.getMobileNumber());contact.setWhatsapp("https://wa.me/91" + authUser.getMobileNumber());contact.setEmail(authUser.getEmailId());contact.setShowCall(showCall);contact.setShowMessage(showMessage);contact.setShowCallback(showCallback);contact.setExpanded(expanded);return contact;}private String getInitials(String firstName, String lastName) {StringBuilder initials = new StringBuilder();if (firstName != null && !firstName.isEmpty()) {initials.append(firstName.charAt(0));}if (lastName != null && !lastName.isEmpty()) {initials.append(lastName.charAt(0));}return initials.toString().toUpperCase();}private String getInitials(String fullName) {if (fullName == null || fullName.isEmpty()) {return "";}String[] parts = fullName.trim().split("\\s+");StringBuilder initials = new StringBuilder();initials.append(parts[0].charAt(0));if (parts.length > 1) {initials.append(parts[parts.length - 1].charAt(0));}return initials.toString().toUpperCase();}}