working web-based entent code

src/main/java/com/billpaymentservice/bbps/controller/PaymentStartController.java

@@ -25,7 +25,7 @@ public class PaymentStartController {
             // Defensive: if bean not injected, return failure
             return ResponseEntity.badRequest().body(new ResponseModel("PaymentStartService not available", "FAILED", 400, null));
         }
-        ResponseModel response = paymentStartService.startPayment(paymentStartUserRequest);
+        ResponseModel response = paymentStartService.startWebPayment(paymentStartUserRequest);
         return ResponseEntity.ok(response);
     }
 }

src/main/java/com/billpaymentservice/bbps/service/PaymentStartService.java

@@ -5,4 +5,6 @@ import com.billpaymentservice.bbps.dto.request.PaymentStartUserRequest;
 
 public interface PaymentStartService {
     ResponseModel startPayment(PaymentStartUserRequest request);
+
+	ResponseModel startWebPayment(PaymentStartUserRequest request);
 }

src/main/java/com/billpaymentservice/bbps/serviceImpl/HttpService.java

@@ -141,6 +141,46 @@ public class HttpService {
 
         return response;
     }
+    public HashMap<String, String> postFormRequest(String url, String formBody) {
+        HashMap<String, String> response = new HashMap<>();
+        
+        try {
+            HttpHeaders headers = new HttpHeaders();
+            headers.setContentType(MediaType.APPLICATION_FORM_URLENCODED);
+
+            log.info("🌐 Sending FORM POST to: {}", url);
+            log.info("📦 Payload: {}", formBody);
+
+            ResponseEntity<String> restResponse = restClient.post()
+                    .uri(url)
+                    .headers(h -> h.addAll(headers))
+                    .body(formBody)
+                    .retrieve()
+                    .toEntity(String.class);
+
+            response.put("respCode", String.valueOf(restResponse.getStatusCode().value()));
+
+            // HTML RESPONSE directly stored
+            response.put("data", restResponse.getBody());
+
+            log.info("✅ FORM POST Response Status: {}", restResponse.getStatusCode());
+
+        } catch (HttpClientErrorException e) {
+            log.error("❌ FORM POST Error: {} - {}", e.getStatusCode(), e.getMessage());
+            
+            response.put("respCode", String.valueOf(e.getStatusCode().value()));
+            response.put("data", e.getResponseBodyAsString()); // still HTML or error string
+            
+        } catch (Exception e) {
+            log.error("❌ FORM POST Exception: {}", e.getMessage(), e);
+            
+            response.put("respCode", "500");
+            response.put("data", "HttpService FORM Error: " + e.getMessage());
+        }
+
+        return response;
+    }
+
  
     
 

src/main/java/com/billpaymentservice/bbps/serviceImpl/PaymentStartServiceImpl.java

@@ -42,7 +42,7 @@ public class PaymentStartServiceImpl implements PaymentStartService {
 
     private static final Logger LOGGER = LoggerFactory.getLogger(PaymentStartServiceImpl.class);
 
-    private String uatPaymentUrl="https://uat.godemo.in/api/UATIntegration/paymentrequest/seamless";
+    private String uatPaymentUrl="https://uat.godemo.in/api/UATIntegration/uat/payin/paymentrequest";
 
     private final PaymentStartRecordRepository paymentStartRecordRepository;
     private final HttpService httpService;
@@ -289,5 +289,82 @@ public class PaymentStartServiceImpl implements PaymentStartService {
            sent.setUdf14(request.getUdf14());
 		return sent;
 	}
+	
+	@Override
+	public ResponseModel startWebPayment(PaymentStartUserRequest request) {
+
+	    String requestId = request.getReqId();
+	    String apiName = "StartPayment";
+	    String txnId = helper.generateTxnId(15);
+
+	    helper.validateMerchant(request.getMid());
+
+	    // inbound log
+	    String requestJson = helper.convertObjectToJson(request);
+	    InboundTraceLog inboundLog =
+	            helper.createInboundLog(requestId, txnId, apiName, request.getMid(),
+	                    BBPSConstant.HTTP_POST, requestJson);
+
+	    // Prepare request payload
+	    PaymentDetailSentRequest sent = createPaymentSentRequest(request);
+	    String orderNo = "ORD" + helper.generateTxnId(12);
+	    sent.setOrderNo(orderNo);
+
+	    String plaintext = helper.convertObjectToJson(sent);
+	    String encKey = BBPSConstant.enckey;
+	    sent.setEnckey(encKey);
+
+	    String encrypted = encryptionUtil.encryptMData(plaintext, encKey);
+
+	    // ----------- BUILD x-www-form-urlencoded PAYLOAD -----------
+	    String formPayload =
+	            "mid=" + URLEncoder.encode(BBPSConstant.mid, StandardCharsets.UTF_8) +
+	            "&payload=" + URLEncoder.encode(encrypted, StandardCharsets.UTF_8);
+      LOGGER.info("Form Payload: {}", formPayload);
+	    OutboundTraceLog outboundLog =
+	            helper.createOutboundLog(txnId, requestId, apiName, uatPaymentUrl,
+	                    BBPSConstant.HTTP_POST, formPayload);
+
+	    // ----------- CALL API (FORM URL-ENCODED) -----------
+	    Map<String, String> responseMap =
+	            httpService.postFormRequest(uatPaymentUrl, formPayload);
+
+	    LOGGER.info("Payment Start Response: {}", responseMap);
+
+	    int httpCode = Integer.parseInt(responseMap.getOrDefault("respCode", "500"));
+	    String respBody = responseMap.getOrDefault("data", "");
+
+	    helper.updateOutboundLogResponse(outboundLog, respBody);
+
+	    // ---- HTTP FAILURE ----
+	    if (httpCode != 200) {
+	        helper.updateInboundLogFailure(inboundLog, respBody, String.valueOf(httpCode));
+	        throw new CustomException("Upstream HTTP Error", "FAILED", httpCode, respBody);
+	    }
+
+	    // ---- EMPTY RESPONSE ----
+	    if (respBody.isEmpty()) {
+	        helper.updateInboundLogFailure(inboundLog, "Empty response from PG", "500");
+	        throw new CustomException("Empty response from PG", "FAILED", 500, null);
+	    }
+
+	    // ❗❗ PG RETURNS HTML → NO JSON PARSING REQUIRED
+	    helper.updateInboundLogSuccess(inboundLog, respBody, "200");
+
+	    // Save record with HTML (optional)
+	  //  bbpsMapperHelper.savePaymentStartHtmlRecord(request, respBody, txnId, orderNo);
+
+	    // Return HTML directly in API response
+	    Map<String, String> result = new HashMap<>();
+	    result.put("html", respBody);
+
+	    return ResponseModel.builder()
+	            .status("SUCCESS")
+	            .statusCode(200)
+	            .message("HTML Response Received")
+	            .data(result)
+	            .build();
+	}
+
 
 }