import 'package:intl/intl.dart';

class Formatters {
  /// Format a hash for display (first 8 + ... + last 8).
  static String truncateHash(String hash, {int chars = 8}) {
    if (hash.length <= chars * 2) return hash;
    return '${hash.substring(0, chars)}...${hash.substring(hash.length - chars)}';
  }

  /// Format amount from smallest unit to display unit.
  /// 50_000_000 -> "50.000000"
  static String formatAmount(int amount, {int decimals = 6}) {
    final value = amount / 1000000;
    return value.toStringAsFixed(decimals);
  }

  /// Format a timestamp string to readable date.
  static String formatTimestamp(String timestamp) {
    try {
      final dt = DateTime.parse(timestamp);
      return DateFormat('yyyy-MM-dd HH:mm:ss').format(dt.toLocal());
    } catch (_) {
      return timestamp;
    }
  }

  /// Format large numbers with comma separators.
  static String formatNumber(int number) {
    return NumberFormat('#,###').format(number);
  }
}