import '../config/app_config.dart';

/// 与 Web `pickAvatarFromRecord` 对齐：头像 URL 可能在多字段或嵌套对象中。
String? pickAvatarUrlFromRecord(Map<String, dynamic>? raw) {
  if (raw == null) {
    return null;
  }
  const directKeys = [
    'avatar',
    'headImg',
    'head_img',
    'headPortrait',
    'head_portrait',
    'portrait',
    'photo',
    'photoUrl',
    'photo_url',
    'faceUrl',
    'face_url',
    'icon',
    'userAvatar',
    'user_avatar',
    'avatarUrl',
    'avatarURL',
    'logo',
  ];
  for (final k in directKeys) {
    final v = raw[k];
    if (v != null) {
      final s = v.toString().trim();
      if (s.isNotEmpty && s != 'null' && s != 'undefined') {
        return s;
      }
    }
  }
  const nestedKeys = [
    'data',
    'member',
    'user',
    'account',
    'result',
    'userInfo',
    'user_info',
  ];
  for (final nk in nestedKeys) {
    final nested = raw[nk];
    if (nested is Map) {
      final found = pickAvatarUrlFromRecord(
        Map<String, dynamic>.from(nested),
      );
      if (found != null) {
        return found;
      }
    }
  }
  return null;
}

/// 将站内相对头像路径解析为可用绝对 URL（与 Web 外链 OSS 同源策略下的展示前提一致）。
String? normalizeAvatarHttpUrl(String? raw) {
  if (raw == null) {
    return null;
  }
  final s = raw.trim();
  if (s.isEmpty || s == 'null' || s == 'undefined') {
    return null;
  }
  final lower = s.toLowerCase();
  if (lower.startsWith('http://') || lower.startsWith('https://')) {
    return s;
  }
  if (s.startsWith('//')) {
    return 'https:$s';
  }
  try {
    final baseUri = Uri.parse(AppConfig.effectiveApiBaseUrl);
    return baseUri.resolve(s).toString();
  } catch (_) {
    return s;
  }
}

/// pick + normalize，供界面与列表模型直接使用。
String? resolvedAvatarUrlFromRecord(Map<String, dynamic>? raw) {
  return normalizeAvatarHttpUrl(pickAvatarUrlFromRecord(raw));
}