112 lines
3.4 KiB
Dart
112 lines
3.4 KiB
Dart
import 'dart:convert';
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import 'dart:io';
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/// Configuration service - loads and caches values from config.json
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///
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/// Uses singleton pattern. Falls back to defaults if config file missing.
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class ConfigService {
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ConfigService._();
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static final instance = ConfigService._();
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// Loaded config cache
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Map<String, dynamic>? _config;
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bool _loaded = false;
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// Defaults
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static const double _defaultThreshold = 80.0;
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static const int _defaultTriggerDuration = 10;
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static const int _defaultShutdownDelay = 10;
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static const String _defaultNavigator = 'rei';
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// Executable directory (for fallback paths)
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late final String _exeDir;
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/// Load config from JSON file
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///
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/// Looks for config.json in same directory as executable.
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/// Safe to call multiple times - only loads once.
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Future<void> load() async {
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if (_loaded) return;
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// Config file sits next to the executable
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final exePath = Platform.resolvedExecutable;
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_exeDir = File(exePath).parent.path;
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try {
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final configPath = '$_exeDir${Platform.pathSeparator}config.json';
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final file = File(configPath);
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if (await file.exists()) {
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final content = await file.readAsString();
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_config = jsonDecode(content) as Map<String, dynamic>;
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}
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} catch (e) {
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// Config parse error - fall back to defaults
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_config = null;
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}
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_loaded = true;
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}
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/// CPU temperature threshold in Celsius
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double get overheatThreshold {
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final overheat = _config?['overheat'] as Map<String, dynamic>?;
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final value = overheat?['threshold_celsius'];
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if (value is num) return value.toDouble();
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return _defaultThreshold;
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}
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/// How long temp must exceed threshold before triggering
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Duration get overheatTriggerDuration {
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final overheat = _config?['overheat'] as Map<String, dynamic>?;
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final value = overheat?['trigger_duration_sec'];
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if (value is int) return Duration(seconds: value);
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return Duration(seconds: _defaultTriggerDuration);
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}
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/// Countdown before shutdown after overheat triggers
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Duration get shutdownDelay {
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final overheat = _config?['overheat'] as Map<String, dynamic>?;
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final value = overheat?['shutdown_delay_sec'];
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if (value is int) return Duration(seconds: value);
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return Duration(seconds: _defaultShutdownDelay);
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}
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/// Path to external assets directory
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String get assetsPath {
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final value = _config?['assets_path'];
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if (value is String && value.isNotEmpty) return value;
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// Fallback: assets/ next to executable
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return '$_exeDir${Platform.pathSeparator}assets';
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}
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/// Navigator character name (subfolder in assets/navigator/)
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String get navigator {
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final value = _config?['navigator'];
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if (value is String && value.isNotEmpty) return value;
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return _defaultNavigator;
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}
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/// Backend URL for API calls
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String get backendUrl {
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final value = _config?['backend_url'];
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if (value is String && value.isNotEmpty) return value;
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return 'http://127.0.0.1:5000';
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}
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/// Get list of all navigator image files
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///
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/// Scans the navigator directory for PNG files.
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/// Returns empty list if directory doesn't exist.
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Future<List<File>> getNavigatorImages() async {
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final dir = Directory('$assetsPath${Platform.pathSeparator}navigator${Platform.pathSeparator}$navigator');
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if (!await dir.exists()) return [];
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return dir
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.listSync()
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.whereType<File>()
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.where((f) => f.path.toLowerCase().endsWith('.png'))
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.toList();
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}
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}
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