import 'package:get/get.dart';
import '../../../data/models/goods.dart';

String _uiLanguage() => Get.locale?.languageCode ?? 'zh';

String localizedGoodsName(DBGoods item) {
  final info = item.localeForLanguage(_uiLanguage());
  final ln = (info['name'] as String?)?.trim() ?? '';
  if (ln.isNotEmpty) return ln;
  final id = item.id.trim();
  switch (id) {
    case 'ai_001':
      return 'ai_001_name'.tr;
    case 'ai_002':
      return 'ai_002_name'.tr;
    case 'ai_003':
      return 'ai_003_name'.tr;
    case 'meet_001':
      return 'meet_001_name'.tr;
    case 'meet_002':
      return 'meet_002_name'.tr;
    case 'meet_003':
      return 'meet_003_name'.tr;
    case 'trade_001':
      return 'trans_001_name'.tr;
    case 'trade_002':
      return 'trans_002_name'.tr;
    case 'trade_003':
      return 'trans_003_name'.tr;
    default:
      final name = item.name.trim();
      return name.isNotEmpty ? name : 'unknown'.tr;
  }
}

String localizedGoodsDesc(DBGoods item) {
  final id = item.id.trim();

  switch (id) {
    case 'ai_001':
      return 'ai_001_desc'.tr;
    case 'ai_002':
      return 'ai_002_desc'.tr;
    case 'ai_003':
      return 'ai_003_desc'.tr;
    case 'meet_001':
      return 'meet_001_desc'.tr;
    case 'meet_002':
      return 'meet_002_desc'.tr;
    case 'meet_003':
      return 'meet_003_desc'.tr;
    case 'trade_001':
      return 'trans_001_desc'.tr;
    case 'trade_002':
      return 'trans_002_desc'.tr;
    case 'trade_003':
      return 'trans_003_desc'.tr;
    default:
      return '';
  }
}

String _trimAmount(double v) {
  final fixed = v.toStringAsFixed(2);
  return fixed.replaceFirst(RegExp(r'\.?0+$'), '');
}

String goodsDisplayPrice(DBGoods item) {
  final lang = _uiLanguage();
  final info = item.localeForLanguage(lang);
  final cur = (info['currency'] as String?)?.trim();
  final p = info['price'];
  final symbol = (cur != null && cur.isNotEmpty)
      ? cur
      : (lang == 'zh' ? '¥' : r'$');
  double v;
  if (p is num) {
    v = p.toDouble();
  } else {
    v = item.priceYuan;
  }
  return '$symbol${_trimAmount(v)}';
}

/// 这一档自己的服务说明：天数和算力都取商品本身，不跟账号当前状态混在一起。
/// 一年及以上按终生，显示无限。算力为 0 也照实写，避免三档看起来发了同一份。
List<String> vipOfferFacts(DBGoods item) {
  final zh = _uiLanguage() == 'zh';
  final lines = <String>[];
  final days = item.viptime;
  if (days >= 365) {
    lines.add(zh ? '到期时间：无限' : 'Expires: unlimited');
  } else if (days > 0) {
    lines.add(zh ? '到期时间：$days 天' : 'Expires: $days days');
  }
  lines.add(zh ? '算力：${item.compute}' : 'Compute: ${item.compute}');
  return lines;
}

/// 会员页三档标题。中文是人民币，其它语言用美元价。
String vipOfferTitle(String tier, String price) {
  final zh = _uiLanguage() == 'zh';
  switch (tier) {
    case 'month':
      return zh ? '月度$price VIP充值' : 'Monthly $price VIP';
    case 'quarter':
      return zh ? '季度$price VIP充值' : 'Quarterly $price VIP';
    case 'lifetime':
      return zh ? '终生$price VIP充值' : 'Lifetime $price VIP';
    default:
      return price;
  }
}