no idea- added loki and other stuff to market-data-gateway, also added config lib

libs/utils/src/logger.ts

@@ -1,6 +1,20 @@
 /**
  * Logger utility with consistent formatting and log levels
+ * Supports console and Loki logging
  */
+import { loggingConfig } from '@stock-bot/config';
+import { LokiClient } from './lokiClient';
+
+// Singleton Loki client
+let lokiClient: LokiClient | null = null;
+
+function getLokiClient(): LokiClient {
+  if (!lokiClient) {
+    lokiClient = new LokiClient(loggingConfig);
+  }
+  return lokiClient;
+}
+
 export class Logger {
   constructor(private serviceName: string, private level: LogLevel = LogLevel.INFO) {}
   
@@ -26,22 +40,51 @@ export class Logger {
     const timestamp = new Date().toISOString();
     const levelStr = LogLevel[level].padEnd(5);
     
-    const logMessage = `[${timestamp}] [${levelStr}] [${this.serviceName}] ${message}`;
+    const formattedArgs = args.length ? this.formatArgs(args) : '';
+    const fullMessage = `${message}${formattedArgs}`;
+    const logMessage = `[${timestamp}] [${levelStr}] [${this.serviceName}] ${fullMessage}`;
     
-    switch (level) {
-      case LogLevel.ERROR:
-        console.error(logMessage, ...args);
-        break;
-      case LogLevel.WARN:
-        console.warn(logMessage, ...args);
-        break;
-      case LogLevel.INFO:
-        console.info(logMessage, ...args);
-        break;
-      case LogLevel.DEBUG:
-      default:
-        console.debug(logMessage, ...args);
-        break;
+    // Console logging
+    if (loggingConfig.console) {
+      switch (level) {
+        case LogLevel.ERROR:
+          console.error(logMessage);
+          break;
+        case LogLevel.WARN:
+          console.warn(logMessage);
+          break;
+        case LogLevel.INFO:
+          console.info(logMessage);
+          break;
+        case LogLevel.DEBUG:
+        default:
+          console.debug(logMessage);
+          break;
+      }
+    }
+    
+    // Loki logging
+    try {
+      const loki = getLokiClient();
+      loki.log(LogLevel[level].toLowerCase(), fullMessage, this.serviceName);
+    } catch (error) {
+      console.error('Failed to send log to Loki:', error);
+    }
+  }
+
+  private formatArgs(args: any[]): string {
+    try {
+      return args.map(arg => {
+        if (arg instanceof Error) {
+          return ` ${arg.message}\n${arg.stack}`;
+        } else if (typeof arg === 'object') {
+          return ` ${JSON.stringify(arg)}`;
+        } else {
+          return ` ${arg}`;
+        }
+      }).join('');
+    } catch (error) {
+      return ` [Error formatting log arguments: ${error}]`;
     }
   }