fix(billing): 修复Token计费逻辑和消息更新机制

* 修复Token计费算法：按批次计费而非Token数量计费
* 添加ChatRequest.messageId字段支持消息关联更新
* 优化消息保存流程：分离基础信息保存和计费信息更新
* 修复预检查逻辑：统一预检查和实际扣费计算方式
* 调整Token阈值：100 → 1000，减少扣费频次
* 完善事件传递：ChatMessageCreatedEvent增加messageId

Fixes: 余额预检查误判、消息计费信息缺失、Token计费不准确

ruoyi-common/ruoyi-common-chat/src/main/java/org/ruoyi/common/chat/request/ChatRequest.java

@@ -82,4 +82,9 @@ public class ChatRequest {
      */
     private String token;
 
+    /**
+     * 消息ID（保存消息成功后设置，用于后续扣费更新）
+     */
+    private Long messageId;
+
 }

ruoyi-modules/ruoyi-chat/src/main/java/org/ruoyi/chat/event/ChatMessageCreatedEvent.java

@@ -12,14 +12,16 @@ public class ChatMessageCreatedEvent extends ApplicationEvent {
     private final String modelName;
     private final String role;
     private final String content;
+    private final Long messageId;
 
-    public ChatMessageCreatedEvent(Long userId, Long sessionId, String modelName, String role, String content) {
+    public ChatMessageCreatedEvent(Long userId, Long sessionId, String modelName, String role, String content, Long messageId) {
         super(userId);
         this.userId = userId;
         this.sessionId = sessionId;
         this.modelName = modelName;
         this.role = role;
         this.content = content;
+        this.messageId = messageId;
     }
 
     public Long getUserId() { return userId; }
@@ -27,5 +29,6 @@ public class ChatMessageCreatedEvent extends ApplicationEvent {
     public String getModelName() { return modelName; }
     public String getRole() { return role; }
     public String getContent() { return content; }
+    public Long getMessageId() { return messageId; }
 }
 

ruoyi-modules/ruoyi-chat/src/main/java/org/ruoyi/chat/listener/BillingEventListener.java

@@ -30,6 +30,7 @@ public class BillingEventListener {
             chatRequest.setModel(event.getModelName());
             chatRequest.setRole(event.getRole());
             chatRequest.setPrompt(event.getContent());
+            chatRequest.setMessageId(event.getMessageId()); // 设置消息ID
             // 异步执行计费累计与扣费
             log.debug("BillingEventListener->开始执行计费逻辑");
             chatCostService.deductToken(chatRequest);

ruoyi-modules/ruoyi-chat/src/main/java/org/ruoyi/chat/service/chat/impl/ChatCostServiceImpl.java

@@ -79,13 +79,13 @@ public class ChatCostServiceImpl implements IChatCostService {
                 log.debug("deductToken->按次计费，清理历史累计token: {}", existingToken.getToken());
             }
 
-            // 记录账单消息
-            saveBillingRecord(chatRequest, tokens, numberCost.doubleValue(), chatModelVo.getModelType());
+            // 更新消息的计费信息到备注
+            updateMessageBilling(chatRequest, tokens, numberCost.doubleValue(), chatModelVo.getModelType());
             return;
         }
 
         // 按token计费：累加并按阈值批量扣费，保留余数
-        final int threshold = 100;
+        final int threshold = 1000;
 
         // 获得记录的累计token数
         // TODO: 这里存在并发竞态条件，需要在chatTokenService层面添加乐观锁或分布式锁
@@ -105,10 +105,13 @@ public class ChatCostServiceImpl implements IChatCostService {
         int remainder = totalTokens - billable;               // 结算后保留的余数
 
         if (billable > 0) {
+            // 计算批次数：每1000个Token为一批，每批扣费单价
+            int batches = billable / threshold;
             BigDecimal numberCost = unitPrice
-                .multiply(BigDecimal.valueOf(billable))
+                .multiply(BigDecimal.valueOf(batches))
                 .setScale(2, RoundingMode.HALF_UP);
-            log.debug("deductToken->按token扣费，结算token数量: {}，单价: {}，费用: {}", billable, unitPrice, numberCost);
+            log.debug("deductToken->按token扣费，结算token数量: {}，批次数: {}，单价: {}，费用: {}", 
+                      billable, batches, unitPrice, numberCost);
 
             try {
                 // 先尝试扣费
@@ -120,8 +123,8 @@ public class ChatCostServiceImpl implements IChatCostService {
                 chatTokenService.editToken(chatToken);
                 log.debug("deductToken->扣费成功，更新余数: {}", remainder);
 
-                // 记录账单消息
-                saveBillingRecord(chatRequest, billable, numberCost.doubleValue(), chatModelVo.getModelType());
+                // 更新消息的计费信息到备注
+                updateMessageBilling(chatRequest, billable, numberCost.doubleValue(), chatModelVo.getModelType());
             } catch (ServiceException e) {
                 // 余额不足时，不更新token累计，保持原有累计数
                 log.warn("deductToken->余额不足，本次token累计保持不变: {}", totalTokens);
@@ -134,11 +137,15 @@ public class ChatCostServiceImpl implements IChatCostService {
             chatToken.setUserId(chatRequest.getUserId());
             chatToken.setToken(totalTokens);
             chatTokenService.editToken(chatToken);
+            
+            // 虽未扣费，但要更新消息的基本信息（实际token数、计费类型等）
+            updateMessageWithoutBilling(chatRequest, tokens, chatModelVo.getModelType());
         }
     }
 
     /**
      * 保存聊天消息记录（不进行计费）
+     * 保存成功后将消息ID设置到ChatRequest中，供后续扣费使用
      */
     @Override
     public void saveMessage(ChatRequest chatRequest) {
@@ -160,31 +167,18 @@ public class ChatCostServiceImpl implements IChatCostService {
         chatMessageBo.setContent(chatRequest.getPrompt().trim());
         chatMessageBo.setModelName(chatRequest.getModel());
 
-        // 计算并保存本次消息的token数
-        int tokens = TikTokensUtil.tokens(chatRequest.getModel(), chatRequest.getPrompt());
-        chatMessageBo.setTotalTokens(tokens);
-        
-        // 普通消息不涉及扣费，deductCost保持null
-        chatMessageBo.setDeductCost(null);
-        chatMessageBo.setRemark("用户消息");
-        
-        // 设置计费类型（根据模型配置获取计费类型）
-        try {
-            ChatModelVo chatModelVo = chatModelService.selectModelByName(chatRequest.getModel());
-            if (chatModelVo != null) {
-                chatMessageBo.setBillingType(chatModelVo.getModelType());
-            } else {
-                chatMessageBo.setBillingType(null); // 模型不存在时设为null
-            }
-        } catch (Exception e) {
-            log.warn("saveMessage->获取模型计费类型失败，设为null，模型: {}", chatRequest.getModel());
-            chatMessageBo.setBillingType(null);
-        }
+//        // 基础消息信息，计费相关数据（tokens、费用、计费类型等）在扣费时统一设置
+//        chatMessageBo.setTotalTokens(0);  // 初始设为0，扣费时更新
+//        chatMessageBo.setDeductCost(null);
+//        chatMessageBo.setBillingType(null);
+//        chatMessageBo.setRemark("用户消息");
 
         try {
             chatMessageService.insertByBo(chatMessageBo);
-            log.debug("saveMessage->成功保存消息，用户ID: {}, 会话ID: {}, tokens: {}", 
-                      chatRequest.getUserId(), chatRequest.getSessionId(), tokens);
+            // 保存成功后，将生成的消息ID设置到ChatRequest中
+            chatRequest.setMessageId(chatMessageBo.getId());
+            log.debug("saveMessage->成功保存消息，消息ID: {}, 用户ID: {}, 会话ID: {}",
+                      chatMessageBo.getId(), chatRequest.getUserId(), chatRequest.getSessionId());
         } catch (Exception e) {
             log.error("saveMessage->保存消息失败", e);
             throw new ServiceException("保存消息失败");
@@ -212,7 +206,8 @@ public class ChatCostServiceImpl implements IChatCostService {
             chatRequest.getSessionId(),
             chatRequest.getModel(),
             chatRequest.getRole(),
-            chatRequest.getPrompt()
+            chatRequest.getPrompt(),
+            chatRequest.getMessageId()
         ));
         log.debug("publishBillingEvent->计费事件发布完成");
     }
@@ -238,15 +233,17 @@ public class ChatCostServiceImpl implements IChatCostService {
         }
 
         // 按token计费：检查累计后可能的费用
-        final int threshold = 100;
+        final int threshold = 1000;
         ChatUsageToken chatToken = chatTokenService.queryByUserId(chatRequest.getUserId(), modelName);
         int previousUnpaid = (chatToken == null) ? 0 : chatToken.getToken();
         int totalTokens = previousUnpaid + tokens;
 
         int billable = (totalTokens / threshold) * threshold;
         if (billable > 0) {
+            // 计算批次数：每1000个Token为一批，每批扣费单价
+            int batches = billable / threshold;
             BigDecimal numberCost = unitPrice
-                .multiply(BigDecimal.valueOf(billable))
+                .multiply(BigDecimal.valueOf(batches))
                 .setScale(2, RoundingMode.HALF_UP);
             checkUserBalanceWithoutDeduct(chatRequest.getUserId(), numberCost.doubleValue());
         }
@@ -272,57 +269,85 @@ public class ChatCostServiceImpl implements IChatCostService {
     }
 
     /**
-     * 保存账单记录
+     * 更新消息的基本信息（不涉及扣费）
      */
-    private void saveBillingRecord(ChatRequest chatRequest, int billedTokens, double cost, String billingTypeCode) {
+    private void updateMessageWithoutBilling(ChatRequest chatRequest, int actualTokens, String billingTypeCode) {
+        // 检查是否有消息ID可以更新
+        if (chatRequest.getMessageId() == null) {
+            log.warn("updateMessageWithoutBilling->消息ID为空，无法更新基本信息");
+            return;
+        }
+
         try {
-            ChatMessageBo billingMessage = new ChatMessageBo();
-            billingMessage.setUserId(chatRequest.getUserId());
-            billingMessage.setSessionId(chatRequest.getSessionId());
-            billingMessage.setRole("system"); // 系统账单消息
-            billingMessage.setModelName(chatRequest.getModel());
-            billingMessage.setTotalTokens(billedTokens);
-            billingMessage.setDeductCost(cost);
-            billingMessage.setRemark(getBillingTypeName(billingTypeCode));
+            // 创建更新对象，只更新基本信息，不涉及扣费
+            ChatMessageBo updateMessage = new ChatMessageBo();
+            updateMessage.setId(chatRequest.getMessageId());
+            updateMessage.setTotalTokens(actualTokens);  // 设置实际token数
+            updateMessage.setBillingType(billingTypeCode); // 设置计费类型
+            updateMessage.setRemark("用户消息（累计中，未达扣费阈值）"); // 说明状态
 
-            // 设置计费类型和构建消息内容
-            setBillingTypeAndContent(billingMessage, billingTypeCode, billedTokens, cost);
-            
-            chatMessageService.insertByBo(billingMessage);
-            log.debug("saveBillingRecord->保存账单记录成功，用户ID: {}, 计费类型: {}, 费用: {}", 
-                      chatRequest.getUserId(), billingTypeCode, cost);
+            // 更新消息
+            chatMessageService.updateByBo(updateMessage);
+            log.debug("updateMessageWithoutBilling->更新消息基本信息成功，消息ID: {}, 实际tokens: {}, 计费类型: {}",
+                      chatRequest.getMessageId(), actualTokens, billingTypeCode);
         } catch (Exception e) {
-            log.error("saveBillingRecord->保存账单记录失败", e);
-            // 账单记录失败不影响主流程，只记录错误日志
+            log.error("updateMessageWithoutBilling->更新消息基本信息失败，消息ID: {}", chatRequest.getMessageId(), e);
+            // 更新失败不影响主流程，只记录错误日志
         }
     }
 
     /**
-     * 设置计费类型和构建消息内容
+     * 更新消息的计费信息到备注字段
      */
-    private void setBillingTypeAndContent(ChatMessageBo billingMessage, String billingTypeCode, int billedTokens, double cost) {
-        billingMessage.setBillingType(billingTypeCode);
+    private void updateMessageBilling(ChatRequest chatRequest, int billedTokens, double cost, String billingTypeCode) {
+        // 检查是否有消息ID可以更新
+        if (chatRequest.getMessageId() == null) {
+            log.warn("updateMessageBilling->消息ID为空，无法更新计费信息");
+            return;
+        }
 
-        // 使用枚举获取计费类型并构建消息内容
+        try {
+            // 计算本次消息的实际token数
+            int actualTokens = TikTokensUtil.tokens(chatRequest.getModel(), chatRequest.getPrompt());
+
+            // 构建计费信息
+            String billingInfo = buildBillingInfo(billingTypeCode, billedTokens, cost);
+
+            // 创建更新对象
+            ChatMessageBo updateMessage = new ChatMessageBo();
+            updateMessage.setId(chatRequest.getMessageId());
+            updateMessage.setTotalTokens(actualTokens);  // 设置实际token数
+            updateMessage.setDeductCost(cost);
+            updateMessage.setRemark(billingInfo);
+            updateMessage.setBillingType(billingTypeCode);
+
+            // 更新消息
+            chatMessageService.updateByBo(updateMessage);
+            log.debug("updateMessageBilling->更新消息计费信息成功，消息ID: {}, 实际tokens: {}, 计费tokens: {}, 费用: {}",
+                      chatRequest.getMessageId(), actualTokens, billedTokens, cost);
+        } catch (Exception e) {
+            log.error("updateMessageBilling->更新消息计费信息失败，消息ID: {}", chatRequest.getMessageId(), e);
+            // 更新失败不影响主流程，只记录错误日志
+        }
+    }
+
+    /**
+     * 构建计费信息字符串
+     */
+    private String buildBillingInfo(String billingTypeCode, int billedTokens, double cost) {
+        // 使用枚举获取计费类型并构建计费信息
         BillingType billingType = BillingType.fromCode(billingTypeCode);
         if (billingType != null) {
-            String content = switch (billingType) {
+            return switch (billingType) {
                 case TIMES -> String.format("%s：消耗 %d tokens，扣费 %.2f 元", billingType.getDescription(), billedTokens, cost);
                 case TOKEN -> String.format("%s：结算 %d tokens，扣费 %.2f 元", billingType.getDescription(), billedTokens, cost);
             };
-            billingMessage.setContent(content);
         } else {
-            billingMessage.setContent(String.format("系统计费：处理 %d tokens，扣费 %.2f 元", billedTokens, cost));
+            return String.format("系统计费：处理 %d tokens，扣费 %.2f 元", billedTokens, cost);
         }
     }
 
-    /**
-     * 获取计费类型名称（用于remark字段）
-     */
-    private String getBillingTypeName(String billingTypeCode) {
-        BillingType billingType = BillingType.fromCode(billingTypeCode);
-        return billingType != null ? billingType.getDescription() : "系统计费";
-    }
+
 
     /**
      * 从用户余额中扣除费用
@@ -377,6 +402,7 @@ public class ChatCostServiceImpl implements IChatCostService {
         chatMessageBo.setContent(prompt);
         chatMessageBo.setDeductCost(cost);
         chatMessageBo.setTotalTokens(0);
+        chatMessageBo.setRemark(String.format("任务计费：%s，扣费 %.2f 元", type, cost));
         chatMessageService.insertByBo(chatMessageBo);
     }
 

ruoyi-modules/ruoyi-chat/src/main/java/org/ruoyi/chat/service/chat/impl/DifyServiceImpl.java

@@ -91,6 +91,8 @@ public class DifyServiceImpl implements IChatService {
                 public void onMessageEnd(MessageEndEvent event) {
                     emitter.complete();
                     log.info("消息结束，完整消息ID: {}", event.getMessageId());
+                    // 扣除费用
+                    ChatRequest chatRequestResponse = new ChatRequest();
                     // 更新conversationId
                     if (StrUtil.isBlank(sessionInfo.getConversationId())) {
                         String conversationId = event.getConversationId();
@@ -104,9 +106,9 @@ public class DifyServiceImpl implements IChatService {
                         chatSessionBo.setSessionContent(sessionInfo.getSessionContent());
                         chatSessionBo.setRemark(sessionInfo.getRemark());
                         chatSessionService.updateByBo(chatSessionBo);
+                        chatRequestResponse.setMessageId(chatSessionBo.getId());
                     }
-                    // 扣除费用
-                    ChatRequest chatRequestResponse = new ChatRequest();
+
                     // 设置对话角色
                     chatRequestResponse.setRole(Message.Role.ASSISTANT.getName());
                     chatRequestResponse.setModel(chatRequest.getModel());