import 'package:flutter/material.dart';

/// Russian labels for the stable string keys the import contract sends.
const brokerLabels = {
  'sber': 'Сбер',
  'vtb': 'ВТБ',
  'tinvest': 'Т-Инвестиции',
  'csv': 'CSV',
};

String brokerLabel(String? broker) => brokerLabels[broker] ?? broker ?? '—';

const parseStatusLabels = {
  'uploaded': 'загружен',
  'parsed': 'разобран',
  'committed': 'импортирован',
  'failed': 'ошибка',
};

String parseStatusLabel(String status) => parseStatusLabels[status] ?? status;

/// The colour of a `parse_status` chip: only `failed` is an error, and only `committed`
/// means the events are actually in the ledger.
Color parseStatusColor(BuildContext context, String status) {
  final scheme = Theme.of(context).colorScheme;
  return switch (status) {
    'committed' => Colors.green,
    'failed' => scheme.error,
    'parsed' => scheme.primary,
    _ => scheme.outline,
  };
}

Widget parseStatusChip(BuildContext context, String status) {
  final color = parseStatusColor(context, status);
  return Chip(
    visualDensity: VisualDensity.compact,
    label: Text(parseStatusLabel(status)),
    backgroundColor: color.withValues(alpha: 0.15),
    labelStyle: TextStyle(color: color),
    side: BorderSide(color: color.withValues(alpha: 0.4)),
  );
}

String formatBytes(int? bytes) {
  if (bytes == null) return '';
  if (bytes < 1024) return '$bytes Б';
  if (bytes < 1024 * 1024) return '${(bytes / 1024).round()} КБ';
  return '${(bytes / (1024 * 1024)).toStringAsFixed(1).replaceAll('.', ',')} МБ';
}