import 'app_config_safe.dart';

enum YMode { auto, fixed, userZoomed }

YMode yModeFromString(String s) {
  switch (s) {
    case 'fixed': return YMode.fixed;
    case 'userZoomed': return YMode.userZoomed;
    case 'auto':
    default: return YMode.auto;
  }
}

String yModeToString(YMode m) {
  switch (m) {
    case YMode.auto: return 'auto';
    case YMode.fixed: return 'fixed';
    case YMode.userZoomed: return 'userZoomed';
  }
}

/// Per-channel display configuration.
///
/// `channel` is the proto channel index (1..16). `enabled` toggles UI
/// visibility — disabled channels still record to the buffer and to CSV.
class ChartConfig {
  ChartConfig({
    required this.channel,
    required this.name,
    this.enabled = true,
    this.yMode = YMode.auto,
    this.yMin = AppConfigSafe.defaultYMin,
    this.yMax = AppConfigSafe.defaultYMax,
  });

  final int channel;
  String name;
  bool enabled;
  YMode yMode;
  double yMin;
  double yMax;

  Map<String, dynamic> toJson() => {
        'channel': channel,
        'name': name,
        'enabled': enabled,
        'yMode': yModeToString(yMode),
        'yMin': yMin,
        'yMax': yMax,
      };

  static ChartConfig fromJson(Map<String, dynamic> j) => ChartConfig(
        channel: j['channel'] as int,
        name: j['name'] as String,
        enabled: j['enabled'] as bool? ?? true,
        yMode: yModeFromString(j['yMode'] as String? ?? 'auto'),
        yMin: (j['yMin'] as num?)?.toDouble() ?? AppConfigSafe.defaultYMin,
        yMax: (j['yMax'] as num?)?.toDouble() ?? AppConfigSafe.defaultYMax,
      );
}