/// Configuration for function buttons (F1-F7) per wall.
/// Loaded from the "functionButtons" section of the config file.
class FunctionButtonConfig {
  final Map<String, Map<String, List<FunctionButtonAction>>> walls;

  const FunctionButtonConfig({this.walls = const {}});

  /// Get actions for a specific wall and button.
  List<FunctionButtonAction> getActions(String wallId, String buttonKey) {
    return walls[wallId]?[buttonKey] ?? [];
  }

  /// Check if a button has any actions configured for this wall.
  bool hasActions(String wallId, String buttonKey) {
    return getActions(wallId, buttonKey).isNotEmpty;
  }

  factory FunctionButtonConfig.fromJson(Map<String, dynamic> json) {
    final wallsJson = json['walls'] as Map<String, dynamic>? ?? {};
    final walls = <String, Map<String, List<FunctionButtonAction>>>{};

    for (final wallEntry in wallsJson.entries) {
      final buttonsJson = wallEntry.value as Map<String, dynamic>? ?? {};
      final buttons = <String, List<FunctionButtonAction>>{};

      for (final buttonEntry in buttonsJson.entries) {
        final actionsJson = buttonEntry.value as List<dynamic>? ?? [];
        buttons[buttonEntry.key] = actionsJson
            .map((a) =>
                FunctionButtonAction.fromJson(a as Map<String, dynamic>))
            .toList();
      }

      walls[wallEntry.key] = buttons;
    }

    return FunctionButtonConfig(walls: walls);
  }
}

/// A single action triggered by a function button press.
class FunctionButtonAction {
  final FunctionButtonActionType type;
  final int viewerId;
  final int sourceId;

  const FunctionButtonAction({
    required this.type,
    required this.viewerId,
    required this.sourceId,
  });

  factory FunctionButtonAction.fromJson(Map<String, dynamic> json) {
    return FunctionButtonAction(
      type: FunctionButtonActionType.fromString(
          json['actionType'] as String? ?? ''),
      viewerId: json['viewerId'] as int? ?? 0,
      sourceId: json['sourceId'] as int? ?? 0,
    );
  }
}

enum FunctionButtonActionType {
  crossSwitch,
  sequenceStart;

  static FunctionButtonActionType fromString(String value) {
    switch (value.toLowerCase()) {
      case 'crossswitch':
        return FunctionButtonActionType.crossSwitch;
      case 'sequencestart':
        return FunctionButtonActionType.sequenceStart;
      default:
        return FunctionButtonActionType.crossSwitch;
    }
  }
}