class BRRMetadata {
  final String route; // "Metropolitan_Line_Uxbridge"
  final String date; // "21_09_2025"
  final String location; // "Uxbridge Station"
  final String controller; // "Benjamin Watt"
  final String? sheetNumber;

  BRRMetadata({
    required this.route,
    required this.date,
    required this.location,
    required this.controller,
    this.sheetNumber,
  });

  factory BRRMetadata.fromSchedule(String scheduleText) {
    // Extract metadata from schedule header
    final routeMatch = RegExp(r"ROUTE\s+(\w+)").firstMatch(scheduleText);
    final dateMatch =
        RegExp(r"(\d{1,2})\s+(\d{1,2})\s+(\d{2})").firstMatch(scheduleText);

    return BRRMetadata(
      route: routeMatch?.group(1) ?? "Unknown",
      date: dateMatch != null
          ? "${dateMatch.group(1)}_${dateMatch.group(2)}_20${dateMatch.group(3)}"
          : DateTime.now().toString().split(" ")[0],
      location: "Unknown",
      controller: "Unknown",
    );
  }

  Map<String, dynamic> toJson() {
    return {
      "route": route,
      "date": date,
      "location": location,
      "controller": controller,
      "sheetNumber": sheetNumber,
    };
  }

  factory BRRMetadata.fromJson(Map<String, dynamic> json) {
    return BRRMetadata(
      route: json["route"] as String,
      date: json["date"] as String,
      location: json["location"] as String,
      controller: json["controller"] as String,
      sheetNumber: json["sheetNumber"] as String?,
    );
  }
}