Fixing MacOS build issue. Improving documentation.

composeApp/src/jvmMain/kotlin/com/rukira/wowbackup/logging/LoggingSetup.kt

@@ -12,7 +12,12 @@ import java.io.File
 
 object LoggingSetup {
 
+    private var initialized = false
+
     fun init() {
+        if (initialized) return
+        initialized = true
+
         val logDir = AppDirectories.logsDir
         val logFile = File(logDir, "wowbackup.log")
 
@@ -26,7 +31,7 @@ object LoggingSetup {
 
         val rollingPolicy = SizeAndTimeBasedRollingPolicy<ILoggingEvent>().apply {
             this.context = context
-            fileNamePattern = "${logDir}/wowbackup.%d{yyyy-MM-dd}.%i.log.gz"
+            fileNamePattern = "${logDir.absolutePath}/wowbackup.%d{yyyy-MM-dd}.%i.log.gz"
             setMaxFileSize(FileSize.valueOf("10MB"))
             maxHistory = 30
             setTotalSizeCap(FileSize.valueOf("100MB"))
@@ -46,5 +51,10 @@ object LoggingSetup {
 
         val rootLogger = context.getLogger(ch.qos.logback.classic.Logger.ROOT_LOGGER_NAME)
         rootLogger.addAppender(fileAppender)
+
+        Thread.setDefaultUncaughtExceptionHandler { thread, throwable ->
+            val uncaughtLogger = LoggerFactory.getLogger("UncaughtExceptionHandler")
+            uncaughtLogger.error("Uncaught exception on thread [${thread.name}]", throwable)
+        }
     }
 }

composeApp/src/jvmTest/kotlin/com/rukira/wowbackup/logging/LoggingSetupTest.kt

@@ -0,0 +1,39 @@
+package com.rukira.wowbackup.logging
+
+import com.rukira.wowbackup.platform.AppDirectories
+import io.github.oshai.kotlinlogging.KotlinLogging
+import java.io.File
+import kotlin.test.Test
+import kotlin.test.assertTrue
+
+class LoggingSetupTest {
+
+    private val testLogger = KotlinLogging.logger {}
+
+    @Test
+    fun testLoggingSetupInitializesAndWritesToFile() {
+        LoggingSetup.init()
+
+        val logsDir = AppDirectories.logsDir
+        assertTrue(logsDir.exists(), "Logs directory should exist")
+        assertTrue(logsDir.isDirectory, "Logs directory should be a directory")
+
+        val testMessage = "Test log entry for unit verification - ${System.currentTimeMillis()}"
+        testLogger.info { testMessage }
+
+        val logFile = File(logsDir, "wowbackup.log")
+        assertTrue(logFile.exists(), "wowbackup.log file should exist")
+        
+        val content = logFile.readText()
+        assertTrue(content.contains(testMessage), "wowbackup.log should contain the logged message")
+    }
+
+    @Test
+    fun testAppDirectoriesLogsDir() {
+        val appDataDir = AppDirectories.appDataDir
+        val logsDir = AppDirectories.logsDir
+
+        assertTrue(logsDir.absolutePath.startsWith(appDataDir.absolutePath), "Logs dir should be inside app data dir")
+        assertTrue(logsDir.name == "logs", "Logs directory should be named 'logs'")
+    }
+}