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innungsapp/apps/mobile/lib/api-url.ts

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+import Constants from 'expo-constants'
+import { Platform } from 'react-native'
+
+function stripTrailingSlash(url: string): string {
+  return url.replace(/\/+$/, '')
+}
+
+function extractHost(hostUri?: string | null): string | null {
+  if (!hostUri) return null
+  const [host] = hostUri.split(':')
+  return host || null
+}
+
+function resolveExpoHost(): string | null {
+  const fromExpoConfig = (Constants.expoConfig as any)?.hostUri as string | undefined
+  const fromManifest2 = (Constants as any)?.manifest2?.extra?.expoClient?.hostUri as
+    | string
+    | undefined
+  const fromManifest = (Constants as any)?.manifest?.debuggerHost as string | undefined
+
+  return extractHost(fromExpoConfig ?? fromManifest2 ?? fromManifest ?? null)
+}
+
+export function getApiBaseUrl(): string {
+  const configuredApiUrl =
+    process.env.EXPO_PUBLIC_API_URL ??
+    ((Constants.expoConfig?.extra as { apiUrl?: string } | undefined)?.apiUrl ?? undefined)
+
+  if (configuredApiUrl && !configuredApiUrl.includes('localhost')) {
+    return stripTrailingSlash(configuredApiUrl)
+  }
+
+  const expoHost = resolveExpoHost()
+  if (expoHost) {
+    return `http://${expoHost}:3000`
+  }
+
+  if (configuredApiUrl) {
+    return stripTrailingSlash(configuredApiUrl)
+  }
+
+  const fallbackHost = Platform.OS === 'android' ? '10.0.2.2' : '127.0.0.1'
+  return `http://${fallbackHost}:3000`
+}