from typing import Any, Callable
from .config import Config
from .loader_config import ConfigLoader
"""配置模块初始化文件

该模块负责初始化配置加载器，并提供获取配置的接口。
"""

# 创建全局配置加载器实例
config_loader = ConfigLoader()


def get_config() -> Config:
    """获取配置实例
    
    Returns:
        Config: 配置实例
        
    Raises:
        RuntimeError: 配置加载失败时抛出
    """
    try:
        return config_loader._config
    except Exception as e:
        raise RuntimeError("获取配置失败") from e


# 暴露配置实例
config: Config = get_config()


def get_config_value(key: str, default=None) -> Any:
    """获取配置值
    
    Args:
        key (str): 配置项key
        default (Any): 默认值
        
    Returns:
        Any: 配置项值
        
    Raises:
        RuntimeError: 配置加载失败时抛出
    """
    try:
        return config_loader.get(key, default)
    except Exception as e:
        raise RuntimeError(f"获取配置项{key}失败") from e


def on_config_change(callback: Callable):
    """注册配置变更回调
    
    Args:
        callback (Callable): 配置变更回调函数
        
    Raises:
        RuntimeError: 回调注册失败时抛出
    """
    try:
        config_loader.on_config_change(callback)
    except Exception as e:
        raise RuntimeError("注册配置变更回调失败") from e


__all__ = [
    'Config', 'ConfigLoader', 'config', 'get_config', 'get_config_value',
    'on_config_change'
]