Phase 4 - synch engine complete

lib/config/config_loader.dart

@@ -1,3 +1,4 @@
+import 'package:flutter_dotenv/flutter_dotenv.dart';
 import 'app_config.dart';
 
 /// Exception thrown when an invalid environment is provided to [ConfigLoader].
@@ -26,33 +27,72 @@ class ConfigLoader {
 
   /// Loads configuration for the specified environment.
   /// 
+  /// Reads from .env file if available, falls back to hardcoded defaults.
+  /// 
   /// [environment] - The environment to load ('dev' or 'prod').
   /// 
   /// Returns an [AppConfig] instance for the specified environment.
   /// 
   /// Throws [InvalidEnvironmentException] if [environment] is not 'dev' or 'prod'.
   static AppConfig load(String environment) {
-    switch (environment.toLowerCase()) {
+    final env = environment.toLowerCase();
+    
+    // Helper to get env var or fallback to default
+    // Handles case where dotenv is not initialized (e.g., in tests)
+    String getEnv(String key, String defaultValue) {
+      try {
+        return dotenv.env[key] ?? defaultValue;
+      } catch (e) {
+        // dotenv not initialized, use default
+        return defaultValue;
+      }
+    }
+    
+    // Helper to parse boolean from env
+    bool getBoolEnv(String key, bool defaultValue) {
+      try {
+        final value = dotenv.env[key];
+        if (value == null) return defaultValue;
+        return value.toLowerCase() == 'true';
+      } catch (e) {
+        // dotenv not initialized, use default
+        return defaultValue;
+      }
+    }
+    
+    // Helper to parse comma-separated list from env
+    List<String> getListEnv(String key, List<String> defaultValue) {
+      try {
+        final value = dotenv.env[key];
+        if (value == null || value.isEmpty) return defaultValue;
+        return value.split(',').map((s) => s.trim()).where((s) => s.isNotEmpty).toList();
+      } catch (e) {
+        // dotenv not initialized, use default
+        return defaultValue;
+      }
+    }
+    
+    switch (env) {
       case 'dev':
-        return const AppConfig(
-          apiBaseUrl: 'https://api-dev.example.com',
-          enableLogging: true,
-          immichBaseUrl: 'https://photos.satoshinakamoto.win',  // ← Change your Immich server URL here
-          immichApiKey: '3v2fTujMJHy1T2rrVJVojdJS0ySm7IRcRvEcvvUvs0', // ← Change your Immich API key here
-          nostrRelays: [                                         // ← Add Nostr relay URLs for testing
+        return AppConfig(
+          apiBaseUrl: getEnv('API_BASE_URL_DEV', 'https://api-dev.example.com'),
+          enableLogging: getBoolEnv('ENABLE_LOGGING_DEV', true),
+          immichBaseUrl: getEnv('IMMICH_BASE_URL', 'https://photos.satoshinakamoto.win'),
+          immichApiKey: getEnv('IMMICH_API_KEY_DEV', 'your-dev-api-key-here'),
+          nostrRelays: getListEnv('NOSTR_RELAYS_DEV', [
             'wss://nostrum.satoshinakamoto.win',
             'wss://nos.lol',
-          ],
+          ]),
         );
       case 'prod':
-        return const AppConfig(
-          apiBaseUrl: 'https://api.example.com',
-          enableLogging: false,
-          immichBaseUrl: 'https://photos.satoshinakamoto.win',      // ← Change your Immich server URL here
-          immichApiKey: 'your-prod-api-key-here',            // ← Change your Immich API key here
-          nostrRelays: [                                         // ← Add Nostr relay URLs for production
+        return AppConfig(
+          apiBaseUrl: getEnv('API_BASE_URL_PROD', 'https://api.example.com'),
+          enableLogging: getBoolEnv('ENABLE_LOGGING_PROD', false),
+          immichBaseUrl: getEnv('IMMICH_BASE_URL', 'https://photos.satoshinakamoto.win'),
+          immichApiKey: getEnv('IMMICH_API_KEY_PROD', 'your-prod-api-key-here'),
+          nostrRelays: getListEnv('NOSTR_RELAYS_PROD', [
             'wss://relay.damus.io',
-          ],
+          ]),
         );
       default:
         throw InvalidEnvironmentException(environment);