/// أدوات تنسيق الوقت والمسافة والسرعة
class Formatters {
  /// Format seconds to HH:MM:SS or MM:SS
  static String time(int seconds) {
    int h = seconds ~/ 3600;
    int m = (seconds % 3600) ~/ 60;
    int s = seconds % 60;
    String pad(int n) => n.toString().padLeft(2, '0');
    if (h > 0) return '${pad(h)}:${pad(m)}:${pad(s)}';
    return '${pad(m)}:${pad(s)}';
  }

  /// Format meters to km or m
  static String distance(double meters) {
    if (meters >= 1000) {
      return '${(meters / 1000).toStringAsFixed(2)} km';
    }
    return '${meters.toStringAsFixed(0)} m';
  }

  /// Format distance short (e.g., "5.2")
  static String distanceKm(double meters) {
    return (meters / 1000).toStringAsFixed(2);
  }

  /// Format speed (m/s) to pace (min/km)
  static String pace(double mps) {
    if (mps <= 0) return '--:--';
    double kmh = mps * 3.6;
    if (kmh <= 0) return '--:--';
    double paceMinKm = 60.0 / kmh;
    int min = paceMinKm.toInt();
    int sec = ((paceMinKm - min) * 60).toInt();
    return '${min.toString().padLeft(2, '0')}:${sec.toString().padLeft(2, '0')}';
  }

  /// Format pace with unit
  static String paceWithUnit(double mps) {
    return '${pace(mps)} min/km';
  }

  /// Format speed m/s to km/h
  static String speedKmh(double mps) {
    return '${(mps * 3.6).toStringAsFixed(1)} km/h';
  }

  /// Format calories
  static String calories(double cal) {
    return '${cal.toStringAsFixed(0)} kcal';
  }

  /// Format elevation
  static String elevation(double meters) {
    return '${meters.toStringAsFixed(0)} m';
  }

  /// Format date
  static String date(DateTime dt) {
    final months = [
      'Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun',
      'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec',
    ];
    return '${dt.day} ${months[dt.month - 1]} ${dt.year}';
  }

  /// Format time of day
  static String timeOfDay(DateTime dt) {
    String pad(int n) => n.toString().padLeft(2, '0');
    return '${pad(dt.hour)}:${pad(dt.minute)}';
  }

  /// Format date and time
  static String dateTime(DateTime dt) {
    return '${date(dt)} ${timeOfDay(dt)}';
  }

  /// Format duration in human readable form
  static String durationHuman(int seconds) {
    if (seconds < 60) return '${seconds}s';
    if (seconds < 3600) return '${seconds ~/ 60}m ${seconds % 60}s';
    int h = seconds ~/ 3600;
    int m = (seconds % 3600) ~/ 60;
    return '${h}h ${m}m';
  }

  /// Get workout type display name
  static String workoutType(String type) {
    switch (type) {
      case 'running':
        return '🏃 Running';
      case 'walking':
        return '🚶 Walking';
      default:
        return type;
    }
  }

  /// Format improvement percentage
  static String improvement(double percent) {
    String sign = percent >= 0 ? '+' : '';
    return '$sign${percent.toStringAsFixed(1)}%';
  }
}