# 服务层初始化文件
# 这里将导入所有服务模块以便于统一调用

from .smtp_server import SMTPServer
from .email_processor import EmailProcessor
from .mail_store import MailStore

# 全局服务实例
_smtp_server = None
_email_processor = None
_mail_store = None

def register_smtp_server(instance):
    """注册SMTP服务器实例"""
    global _smtp_server
    _smtp_server = instance

def register_email_processor(instance):
    """注册邮件处理器实例"""
    global _email_processor
    _email_processor = instance

def register_mail_store(instance):
    """注册邮件存储实例"""
    global _mail_store
    _mail_store = instance

def get_smtp_server():
    """获取SMTP服务器实例"""
    return _smtp_server

def get_email_processor():
    """获取邮件处理器实例"""
    return _email_processor

def get_mail_store():
    """获取邮件存储实例"""
    return _mail_store

__all__ = [
    'SMTPServer', 'EmailProcessor', 'MailStore',
    'register_smtp_server', 'register_email_processor', 'register_mail_store',
    'get_smtp_server', 'get_email_processor', 'get_mail_store'
]