# -*- coding: utf-8 -*-
"""
联系人管理器 - 提供全局访问联系人信息的单例类
"""
import logging
from typing import Dict, Optional


class ContactManager:
    """联系人管理器单例类"""
    _instance = None
    _contacts: Dict[str, str] = {}
    _initialized = False
    _logger = logging.getLogger("ContactManager")

    def __new__(cls):
        if cls._instance is None:
            cls._instance = super(ContactManager, cls).__new__(cls)
        return cls._instance

    def __init__(self):
        # 确保初始化代码只执行一次
        if not ContactManager._initialized:
            self._logger.info("初始化联系人管理器")
            ContactManager._initialized = True

    @classmethod
    def get_instance(cls):
        """获取单例实例"""
        if cls._instance is None:
            cls._instance = ContactManager()
        return cls._instance

    def set_contacts(self, contacts: Dict[str, str]) -> None:
        """设置联系人字典
        
        Args:
            contacts: 联系人字典，格式为 {"wxid": "NickName"}
        """
        self._contacts = contacts
        self._logger.info(f"联系人信息已更新，共 {len(contacts)} 个联系人")

    def get_contacts(self) -> Dict[str, str]:
        """获取所有联系人
        
        Returns:
            联系人字典，格式为 {"wxid": "NickName"}
        """
        return self._contacts

    def get_nickname(self, wxid: str) -> str:
        """根据微信ID获取昵称
        
        Args:
            wxid: 微信ID
            
        Returns:
            对应的昵称，如果不存在则返回wxid本身
        """
        return self._contacts.get(wxid, wxid)

    def update_contact(self, wxid: str, nickname: str) -> None:
        """更新单个联系人信息
        
        Args:
            wxid: 微信ID
            nickname: 昵称
        """
        self._contacts[wxid] = nickname
        self._logger.debug(f"已更新联系人: {wxid} -> {nickname}")

    def refresh_contacts(self, new_contacts: Dict[str, str]) -> None:
        """刷新联系人信息
        
        Args:
            new_contacts: 新的联系人字典
        """
        self._contacts = new_contacts
        self._logger.info(f"联系人信息已刷新，共 {len(new_contacts)} 个联系人")