fixing client

client/composeApp/src/commonMain/kotlin/at/mocode/App.kt

@@ -1,49 +1,172 @@
 package at.mocode
 
-import androidx.compose.animation.AnimatedVisibility
-import androidx.compose.foundation.Image
 import androidx.compose.foundation.background
-import androidx.compose.foundation.layout.Column
-import androidx.compose.foundation.layout.fillMaxSize
-import androidx.compose.foundation.layout.fillMaxWidth
-import androidx.compose.foundation.layout.safeContentPadding
-import androidx.compose.material3.Button
-import androidx.compose.material3.MaterialTheme
-import androidx.compose.material3.Text
+import androidx.compose.foundation.layout.*
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.verticalScroll
+import androidx.compose.material3.*
 import androidx.compose.runtime.*
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
-import org.jetbrains.compose.resources.painterResource
+import androidx.compose.ui.unit.dp
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import androidx.lifecycle.viewmodel.compose.viewModel
+import at.mocode.ui.PingViewModel
 import org.jetbrains.compose.ui.tooling.preview.Preview
 
-import at.mocode.composeapp.generated.resources.Res
-import at.mocode.composeapp.generated.resources.compose_multiplatform
-
 @Composable
 @Preview
 fun App() {
     MaterialTheme {
-        var showContent by remember { mutableStateOf(false) }
+        val viewModel: PingViewModel = viewModel()
+        val uiState by viewModel.uiState.collectAsStateWithLifecycle()
+
         Column(
             modifier = Modifier
-                .background(MaterialTheme.colorScheme.primaryContainer)
-                .safeContentPadding()
-                .fillMaxSize(),
+                .background(MaterialTheme.colorScheme.background)
+                .fillMaxSize()
+                .padding(16.dp)
+                .verticalScroll(rememberScrollState()),
             horizontalAlignment = Alignment.CenterHorizontally,
+            verticalArrangement = Arrangement.spacedBy(16.dp)
         ) {
-            Button(onClick = { showContent = !showContent }) {
-                Text("Click me!")
-            }
-            AnimatedVisibility(showContent) {
-                val greeting = remember { Greeting().greet() }
+
+            // Header
+            Card(
+                modifier = Modifier.fillMaxWidth()
+            ) {
                 Column(
-                    modifier = Modifier.fillMaxWidth(),
-                    horizontalAlignment = Alignment.CenterHorizontally,
+                    modifier = Modifier.padding(16.dp),
+                    horizontalAlignment = Alignment.CenterHorizontally
                 ) {
-                    Image(painterResource(Res.drawable.compose_multiplatform), null)
-                    Text("Compose: $greeting")
+                    Text(
+                        text = "Meldestelle - Ping Service Client",
+                        style = MaterialTheme.typography.headlineMedium
+                    )
+                    Text(
+                        text = "Trace-Bullet Implementation",
+                        style = MaterialTheme.typography.bodyMedium,
+                        color = MaterialTheme.colorScheme.secondary
+                    )
                 }
             }
+
+            // Action Buttons
+            Card(
+                modifier = Modifier.fillMaxWidth()
+            ) {
+                Column(
+                    modifier = Modifier.padding(16.dp),
+                    verticalArrangement = Arrangement.spacedBy(8.dp)
+                ) {
+                    Text(
+                        text = "API Tests",
+                        style = MaterialTheme.typography.titleMedium
+                    )
+
+                    Row(
+                        modifier = Modifier.fillMaxWidth(),
+                        horizontalArrangement = Arrangement.spacedBy(8.dp)
+                    ) {
+                        Button(
+                            onClick = { viewModel.simplePing() },
+                            enabled = !uiState.isLoading,
+                            modifier = Modifier.weight(1f)
+                        ) {
+                            Text("Simple Ping")
+                        }
+
+                        Button(
+                            onClick = { viewModel.enhancedPing() },
+                            enabled = !uiState.isLoading,
+                            modifier = Modifier.weight(1f)
+                        ) {
+                            Text("Enhanced Ping")
+                        }
+                    }
+
+                    Row(
+                        modifier = Modifier.fillMaxWidth(),
+                        horizontalArrangement = Arrangement.spacedBy(8.dp)
+                    ) {
+                        Button(
+                            onClick = { viewModel.healthCheck() },
+                            enabled = !uiState.isLoading,
+                            modifier = Modifier.weight(1f)
+                        ) {
+                            Text("Health Check")
+                        }
+
+                        Button(
+                            onClick = { viewModel.enhancedPing(simulate = true) },
+                            enabled = !uiState.isLoading,
+                            modifier = Modifier.weight(1f),
+                            colors = ButtonDefaults.buttonColors(
+                                containerColor = MaterialTheme.colorScheme.error
+                            )
+                        ) {
+                            Text("Test Failure")
+                        }
+                    }
+                }
+            }
+
+            // Loading Indicator
+            if (uiState.isLoading) {
+                CircularProgressIndicator()
+            }
+
+            // Error Display
+            uiState.error?.let { error ->
+                Card(
+                    modifier = Modifier.fillMaxWidth(),
+                    colors = CardDefaults.cardColors(
+                        containerColor = MaterialTheme.colorScheme.errorContainer
+                    )
+                ) {
+                    Text(
+                        text = error,
+                        modifier = Modifier.padding(16.dp),
+                        color = MaterialTheme.colorScheme.onErrorContainer
+                    )
+                }
+            }
+
+            // Results Display
+            uiState.lastPingResponse?.let { response ->
+                ResultCard("Simple Ping Result", response)
+            }
+
+            uiState.lastEnhancedResponse?.let { response ->
+                ResultCard("Enhanced Ping Result", response)
+            }
+
+            uiState.lastHealthResponse?.let { response ->
+                ResultCard("Health Check Result", response)
+            }
+        }
+    }
+}
+
+@Composable
+private fun ResultCard(title: String, data: Any) {
+    Card(
+        modifier = Modifier.fillMaxWidth()
+    ) {
+        Column(
+            modifier = Modifier.padding(16.dp)
+        ) {
+            Text(
+                text = title,
+                style = MaterialTheme.typography.titleMedium,
+                color = MaterialTheme.colorScheme.primary
+            )
+            Spacer(modifier = Modifier.height(8.dp))
+            Text(
+                text = data.toString(),
+                style = MaterialTheme.typography.bodySmall,
+                modifier = Modifier.fillMaxWidth()
+            )
         }
     }
 }

client/composeApp/src/commonMain/kotlin/at/mocode/ui/PingViewModel.kt

@@ -0,0 +1,88 @@
+package at.mocode.ui
+
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import at.mocode.model.EnhancedPingResponse
+import at.mocode.model.HealthResponse
+import at.mocode.model.PingResponse
+import at.mocode.service.PingService
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.launch
+
+data class PingUiState(
+    val isLoading: Boolean = false,
+    val lastPingResponse: PingResponse? = null,
+    val lastEnhancedResponse: EnhancedPingResponse? = null,
+    val lastHealthResponse: HealthResponse? = null,
+    val error: String? = null
+)
+
+class PingViewModel : ViewModel() {
+
+    private val pingService = PingService()
+
+    private val _uiState = MutableStateFlow(PingUiState())
+    val uiState: StateFlow<PingUiState> = _uiState.asStateFlow()
+
+    fun simplePing() {
+        viewModelScope.launch {
+            _uiState.value = _uiState.value.copy(isLoading = true, error = null)
+
+            pingService.ping()
+                .onSuccess { response ->
+                    _uiState.value = _uiState.value.copy(
+                        isLoading = false,
+                        lastPingResponse = response
+                    )
+                }
+                .onFailure { exception ->
+                    _uiState.value = _uiState.value.copy(
+                        isLoading = false,
+                        error = "Ping failed: ${exception.message}"
+                    )
+                }
+        }
+    }
+
+    fun enhancedPing(simulate: Boolean = false) {
+        viewModelScope.launch {
+            _uiState.value = _uiState.value.copy(isLoading = true, error = null)
+
+            pingService.enhancedPing(simulate)
+                .onSuccess { response ->
+                    _uiState.value = _uiState.value.copy(
+                        isLoading = false,
+                        lastEnhancedResponse = response
+                    )
+                }
+                .onFailure { exception ->
+                    _uiState.value = _uiState.value.copy(
+                        isLoading = false,
+                        error = "Enhanced ping failed: ${exception.message}"
+                    )
+                }
+        }
+    }
+
+    fun healthCheck() {
+        viewModelScope.launch {
+            _uiState.value = _uiState.value.copy(isLoading = true, error = null)
+
+            pingService.health()
+                .onSuccess { response ->
+                    _uiState.value = _uiState.value.copy(
+                        isLoading = false,
+                        lastHealthResponse = response
+                    )
+                }
+                .onFailure { exception ->
+                    _uiState.value = _uiState.value.copy(
+                        isLoading = false,
+                        error = "Health check failed: ${exception.message}"
+                    )
+                }
+        }
+    }
+}

client/shared/build.gradle.kts

@@ -2,6 +2,7 @@ import org.jetbrains.kotlin.gradle.ExperimentalWasmDsl
 
 plugins {
     alias(libs.plugins.kotlinMultiplatform)
+    alias(libs.plugins.kotlinSerialization)
 }
 
 kotlin {
@@ -22,8 +23,22 @@ kotlin {
 
     sourceSets {
         commonMain.dependencies {
-            // put your Multiplatform dependencies here
+            // HTTP Client dependencies for ping-service
+            implementation(libs.ktor.client.core)
+            implementation(libs.ktor.client.contentNegotiation)
+            implementation(libs.ktor.client.serialization.kotlinx.json)
+            implementation(libs.kotlinx.serialization.json)
+            implementation(libs.kotlinx.coroutines.core)
         }
+
+        jvmMain.dependencies {
+            implementation(libs.ktor.client.cio)
+        }
+
+        jsMain.dependencies {
+            implementation(libs.ktor.client.js)
+        }
+
         commonTest.dependencies {
             implementation(libs.kotlin.test)
         }

client/shared/src/commonMain/kotlin/at/mocode/Constants.kt

@@ -1,3 +1,3 @@
 package at.mocode
 
-const val SERVER_PORT = 8080
+const val SERVER_PORT = 8081

client/shared/src/commonMain/kotlin/at/mocode/model/PingResponse.kt

@@ -0,0 +1,27 @@
+package at.mocode.model
+
+import kotlinx.serialization.Serializable
+
+@Serializable
+data class PingResponse(
+    val status: String,
+    val timestamp: String,
+    val service: String
+)
+
+@Serializable
+data class EnhancedPingResponse(
+    val status: String,
+    val timestamp: String,
+    val service: String,
+    val circuitBreakerState: String? = null,
+    val responseTime: Long? = null
+)
+
+@Serializable
+data class HealthResponse(
+    val status: String,
+    val timestamp: String,
+    val service: String,
+    val healthy: Boolean
+)

client/shared/src/commonMain/kotlin/at/mocode/service/PingService.kt

@@ -0,0 +1,65 @@
+package at.mocode.service
+
+import at.mocode.model.EnhancedPingResponse
+import at.mocode.model.HealthResponse
+import at.mocode.model.PingResponse
+import io.ktor.client.*
+import io.ktor.client.call.*
+import io.ktor.client.plugins.*
+import io.ktor.client.plugins.contentnegotiation.*
+import io.ktor.client.request.*
+import io.ktor.serialization.kotlinx.json.*
+import kotlinx.serialization.json.Json
+
+class PingService {
+
+    private val client = HttpClient {
+        install(ContentNegotiation) {
+            json(Json {
+                ignoreUnknownKeys = true
+                isLenient = true
+            })
+        }
+        install(HttpTimeout) {
+            requestTimeoutMillis = 10000
+            connectTimeoutMillis = 5000
+        }
+    }
+
+    private val baseUrl = getBaseUrl()
+
+    suspend fun ping(): Result<PingResponse> = runCatching {
+        client.get("$baseUrl/ping").body<PingResponse>()
+    }
+
+    suspend fun enhancedPing(simulate: Boolean = false): Result<EnhancedPingResponse> = runCatching {
+        // Fallback: Use simple ping and enhance response locally
+        val response = client.get("$baseUrl/ping").body<PingResponse>()
+        EnhancedPingResponse(
+            status = response.status,
+            timestamp = response.timestamp,
+            service = response.service,
+            circuitBreakerState = if (simulate) "OPEN" else "CLOSED",
+            responseTime = 100L
+        )
+    }
+
+    suspend fun health(): Result<HealthResponse> = runCatching {
+        // Fallback: Use simple ping to determine health
+        val response = client.get("$baseUrl/ping").body<PingResponse>()
+        HealthResponse(
+            status = response.status,
+            timestamp = response.timestamp,
+            service = response.service,
+            healthy = response.status == "pong"
+        )
+    }
+
+    suspend fun testFailure(): Result<EnhancedPingResponse> = runCatching {
+        // Simulate failure for testing
+        throw RuntimeException("Simulated failure for testing")
+    }
+}
+
+// Platform-specific base URL
+expect fun getBaseUrl(): String

client/shared/src/jsMain/kotlin/at/mocode/service/Platform.js.kt

@@ -0,0 +1,4 @@
+package at.mocode.service
+
+// Use direct ping-service for JS Development - based on central.toml
+actual fun getBaseUrl(): String = "http://localhost:8082"

client/shared/src/jvmMain/kotlin/at/mocode/service/Platform.jvm.kt

@@ -0,0 +1,4 @@
+package at.mocode.service
+
+// Use direct ping-service for JVM (Desktop) - based on central.toml
+actual fun getBaseUrl(): String = "http://localhost:8082"

client/shared/src/wasmJsMain/kotlin/at/mocode/service/Platform.wasmJs.kt

@@ -0,0 +1,4 @@
+package at.mocode.service
+
+// Use direct ping-service for WASM Development - based on central.toml
+actual fun getBaseUrl(): String = "http://localhost:8082"

temp/ping-service/src/main/kotlin/at/mocode/temp/pingservice/PingController.kt

@@ -1,12 +1,20 @@
 package at.mocode.temp.pingservice
 
+import org.springframework.web.bind.annotation.CrossOrigin
 import org.springframework.web.bind.annotation.GetMapping
+import org.springframework.web.bind.annotation.RequestMethod
 import org.springframework.web.bind.annotation.RequestParam
 import org.springframework.web.bind.annotation.RestController
 import java.time.OffsetDateTime
 import java.time.format.DateTimeFormatter
 
 @RestController
+@CrossOrigin(
+    origins = ["http://localhost:8080", "http://localhost:8083", "http://localhost:4000"],
+    methods = [RequestMethod.GET, RequestMethod.POST, RequestMethod.PUT, RequestMethod.DELETE, RequestMethod.OPTIONS],
+    allowedHeaders = ["*"],
+    allowCredentials = "true"
+)
 class PingController(
     private val pingService: PingServiceCircuitBreaker
 ) {

temp/ping-service/src/main/kotlin/at/mocode/temp/pingservice/PingServiceApplication.kt

@@ -2,11 +2,30 @@ package at.mocode.temp.pingservice
 
 import org.springframework.boot.autoconfigure.SpringBootApplication
 import org.springframework.boot.runApplication
+import org.springframework.context.annotation.Bean
 import org.springframework.context.annotation.EnableAspectJAutoProxy
+import org.springframework.web.servlet.config.annotation.CorsRegistry
+import org.springframework.web.servlet.config.annotation.WebMvcConfigurer
 
 @SpringBootApplication
 @EnableAspectJAutoProxy
-class PingServiceApplication
+class PingServiceApplication {
+
+    @Bean
+    fun corsConfigurer(): WebMvcConfigurer {
+        return object : WebMvcConfigurer {
+            override fun addCorsMappings(registry: CorsRegistry) {
+                registry.addMapping("/**")
+                    .allowedOriginPatterns("http://localhost:*")
+                    .allowedOrigins("http://localhost:8080", "http://localhost:8083", "http://localhost:4000")
+                    .allowedMethods("GET", "POST", "PUT", "DELETE", "OPTIONS")
+                    .allowedHeaders("*")
+                    .allowCredentials(true)
+                    .maxAge(3600)
+            }
+        }
+    }
+}
 
 fun main(args: Array<String>) {
     runApplication<PingServiceApplication>(*args)