feat: update logging behavior for Optimizely SDK

- Remove unused log level property in CustomLogger
- Implement channel setter method in OptimizelyFlutterLogger
- Add guard clauses for levels and logger channel availability in log method
- Update channel invocation to happen on main thread
- Set log level in SwiftOptimizelyFlutterSdkPlugin based on parameters
- Simplify DefaultOptimizelyLogger log method
- Update log message formatting in logger bridge for consistency

Author: muzahidul-opti

example/lib/custom_logger.dart

@@ -2,9 +2,6 @@ import 'package:optimizely_flutter_sdk/optimizely_flutter_sdk.dart';
 import 'package:flutter/foundation.dart';
 
 class CustomLogger implements OptimizelyLogger {
-  @override
-  OptimizelyLogLevel logLevel = OptimizelyLogLevel.debug;
-
   @override
   void log(OptimizelyLogLevel level, String message) {
     if (kDebugMode) {

ios/Classes/OptimizelyFlutterLogger.swift

@@ -4,22 +4,43 @@ import Optimizely
 public class OptimizelyFlutterLogger: NSObject, OPTLogger {
     public static var logLevel: OptimizelyLogLevel = .info
 
-    private static let loggerChannel = FlutterMethodChannel(
-        name: "optimizely_flutter_sdk_logger",
-        binaryMessenger: SwiftOptimizelyFlutterSdkPlugin.registrar?.messenger() ?? FlutterEngine().binaryMessenger
-    )
+    private static var loggerChannel: FlutterMethodChannel?
 
     public required override init() {
         super.init()
     }
 
+    public static func setChannel(_ channel: FlutterMethodChannel) {
+        loggerChannel = channel
+    }
+    
     public func log(level: OptimizelyLogLevel, message: String) {
-        // Ensure we're on the main thread when calling Flutter
-        DispatchQueue.main.async {
-            Self.loggerChannel.invokeMethod("log", arguments: [
+        // Early return if level check fails
+        guard level.rawValue <= OptimizelyFlutterLogger.logLevel.rawValue else { 
+            return 
+        }
+        
+        // Ensure we have a valid channel
+        guard let channel = Self.loggerChannel else {
+            print("[OptimizelyFlutterLogger] ERROR: No logger channel available!")
+            return
+        }
+        
+        // Ensure logging happens on main thread as FlutterMethodChannel requires it
+        if Thread.isMainThread {
+            // Already on main thread
+            channel.invokeMethod("log", arguments: [
                 "level": level.rawValue,
                 "message": message
             ])
+        } else {
+            // Switch to main thread
+            DispatchQueue.main.sync {
+                channel.invokeMethod("log", arguments: [
+                    "level": level.rawValue,
+                    "message": message
+                ])
+            }
         }
     }
 }

ios/Classes/SwiftOptimizelyFlutterSdkPlugin.swift

@@ -112,6 +112,7 @@ public class SwiftOptimizelyFlutterSdkPlugin: NSObject, FlutterPlugin {
         var defaultLogLevel = OptimizelyLogLevel.info
         if let logLevel = parameters[RequestParameterKey.defaultLogLevel] as? String {
             defaultLogLevel = Utils.getDefaultLogLevel(logLevel)
+            OptimizelyFlutterLogger.logLevel = defaultLogLevel
         }
 
         // SDK Settings Default Values

lib/src/logger/flutter_logger.dart

@@ -1,26 +1,13 @@
 import 'package:optimizely_flutter_sdk/src/data_objects/log_level.dart';
 
 abstract class OptimizelyLogger {
-  /// The log level for the logger
-  OptimizelyLogLevel get logLevel;
-  set logLevel(OptimizelyLogLevel level);
-
   /// Log a message at a certain level
   void log(OptimizelyLogLevel level, String message);
 }
 
 class DefaultOptimizelyLogger implements OptimizelyLogger {
-  @override
-  OptimizelyLogLevel logLevel = OptimizelyLogLevel.info;
-
   @override
   void log(OptimizelyLogLevel level, String message) {
-    if (_shouldLog(level)) {
-      print('[Optimizely ${level.name.toUpperCase()}] $message');
-    }
-  }
-
-  bool _shouldLog(OptimizelyLogLevel messageLevel) {
-    return messageLevel.index <= logLevel.index;
+    print('[Optimizely ${level.name}] $message');
   }
 }

lib/src/logger/logger_bridge.dart

@@ -52,7 +52,7 @@ class LoggerBridge {
       if (_customLogger != null) {
         _customLogger!.log(level, message);
       } else {
-        print('[Optimizely ${level.name.toUpperCase()}] $message');
+        print('[Optimizely ${level.name}] $message');
       }
     } catch (e) {
       print('[LoggerBridge] Error processing log call: $e');