mail-hub/lib/core/models/address.dart

/// 地址（发件人/收件人）与邮件相关模型
library;

class MailAddress {
  final String name;
  final String email;

  const MailAddress(this.name, this.email);

  bool get isEmpty => email.trim().isEmpty;
  String get display => name.trim().isNotEmpty ? '$name <$email>' : email;

  factory MailAddress.parse(String raw) {
    final s = raw.trim();
    if (s.isEmpty) return const MailAddress('', '');
    // "Name" <email@x.com>
    final m1 = RegExp(r'"([^"]*)"\s*<([^>]+)>').firstMatch(s);
    if (m1 != null) return MailAddress(m1.group(1)!, m1.group(2)!.trim());
    // Name <email@x.com>
    final m2 = RegExp(r'([^<]*?)\s*<([^>]+)>').firstMatch(s);
    if (m2 != null) {
      return MailAddress(m2.group(1)!.trim(), m2.group(2)!.trim());
    }
    // 纯 email
    return MailAddress('', s);
  }

  static List<MailAddress> parseList(String? raw) {
    if (raw == null || raw.trim().isEmpty) return const [];
    // 按逗号分割但跳过引号内的逗号
    final result = <MailAddress>[];
    final buf = StringBuffer();
    var inQuote = false;
    for (var i = 0; i < raw.length; i++) {
      final c = raw[i];
      if (c == '"') inQuote = !inQuote;
      if (c == ',' && !inQuote) {
        final a = MailAddress.parse(buf.toString());
        if (!a.isEmpty) result.add(a);
        buf.clear();
      } else {
        buf.write(c);
      }
    }
    final last = MailAddress.parse(buf.toString());
    if (!last.isEmpty) result.add(last);
    return result;
  }

  Map<String, Object?> toJson() => {'name': name, 'email': email};

  factory MailAddress.fromJson(Map<String, Object?> j) =>
      MailAddress((j['name'] as String?) ?? '', (j['email'] as String?) ?? '');
}

class MailAttachment {
  final String fileName;
  final String contentType;
  final String? contentId; // 内嵌图片 CID
  final bool inline;
  final int size;
  final String? localPath; // 已下载到本地的路径
  final String? encoding; // base64 / quoted-printable / 7bit / 8bit / binary
  final Uint8ListBytes? data; // 内存中的原始数据(可选, 大附件不常驻)

  const MailAttachment({
    required this.fileName,
    this.contentType = 'application/octet-stream',
    this.contentId,
    this.inline = false,
    this.size = 0,
    this.localPath,
    this.encoding,
    this.data,
  });

  MailAttachment copyWith({String? localPath, Uint8ListBytes? data}) =>
      MailAttachment(
        fileName: fileName,
        contentType: contentType,
        contentId: contentId,
        inline: inline,
        size: size,
        localPath: localPath ?? this.localPath,
        encoding: encoding,
        data: data ?? this.data,
      );

  Map<String, Object?> toJson() => {
        'fileName': fileName,
        'contentType': contentType,
        'contentId': contentId,
        'inline': inline ? 1 : 0,
        'size': size,
        'localPath': localPath,
        'encoding': encoding,
      };

  factory MailAttachment.fromJson(Map<String, Object?> j) => MailAttachment(
        fileName: (j['fileName'] as String?) ?? '',
        contentType: (j['contentType'] as String?) ?? 'application/octet-stream',
        contentId: j['contentId'] as String?,
        inline: (j['inline'] as int?) == 1,
        size: (j['size'] as int?) ?? 0,
        localPath: j['localPath'] as String?,
        encoding: j['encoding'] as String?,
      );
}

/// 用于避免直接引入 dart:typed_data 到模型层的轻量包装（可序列化）
class Uint8ListBytes {
  final List<int> bytes;
  const Uint8ListBytes(this.bytes);
}