import 'package:yumi/shared/business_logic/models/res/gift_res.dart';
import 'package:yumi/shared/data_sources/models/enum/sc_gift_type.dart';
import 'package:yumi/shared/tools/sc_cp_relation_notice_utils.dart';

bool scIsCpGiftTab(String? tabType) =>
    tabType?.trim().toUpperCase() == SCGiftType.CP.name;

bool scIsCpGift(SocialChatGiftRes? gift) => scIsCpGiftTab(gift?.giftTab);

String scCpRelationTypeForGift(SocialChatGiftRes gift) {
  final explicit = _normalizeExplicitGiftRelationType(gift.relationType);
  if (explicit != null) {
    return explicit;
  }
  for (final value in <String?>[
    gift.type,
    gift.giftCode,
    gift.giftName,
    gift.special,
    gift.standardId,
  ]) {
    final inferred = _inferCpRelationTypeFromGiftText(value);
    if (inferred != null) {
      return inferred;
    }
  }
  return "CP";
}

String? _normalizeExplicitGiftRelationType(String? relationType) {
  final raw = relationType?.trim();
  if (raw == null || raw.isEmpty) {
    return null;
  }
  final normalized = scNormalizeCpRelationType(raw);
  if (normalized != "CP" || _isCpRelationText(raw)) {
    return normalized;
  }
  return _inferCpRelationTypeFromGiftText(raw) ?? normalized;
}

bool _isCpRelationText(String value) {
  final upper = value.trim().toUpperCase();
  return upper == "CP" || upper == "COUPLE";
}

String? _inferCpRelationTypeFromGiftText(String? value) {
  final upper = value?.trim().toUpperCase();
  if (upper == null || upper.isEmpty) {
    return null;
  }
  if (_hasRelationToken(upper, const ["SIS", "SISTER", "SISTERS"])) {
    return "SISTERS";
  }
  if (_hasRelationToken(upper, const [
    "BRO",
    "BROS",
    "BROTHER",
    "BROTHERS",
    "SWORN_BRO",
    "SWORN_BROS",
    "SWORN_BROTHER",
    "SWORN_BROTHERS",
  ])) {
    return "BROTHER";
  }
  if (_hasRelationToken(upper, const ["CP", "COUPLE"])) {
    return "CP";
  }
  return null;
}

bool _hasRelationToken(String upperText, List<String> tokens) {
  for (final token in tokens) {
    final escaped = RegExp.escape(token);
    if (RegExp('(^|[^A-Z0-9])$escaped([^A-Z0-9]|\$)').hasMatch(upperText)) {
      return true;
    }
  }
  return false;
}