from pydantic_settings import BaseSettings
from .config_app import AppConfig
from .config_database import DatabaseConfig
from .config_logging import LoggingConfig


class Config(BaseSettings):
    app: AppConfig = AppConfig()
    database: DatabaseConfig = DatabaseConfig()
    logging: LoggingConfig = LoggingConfig()

    class Config:
        env_prefix = ''
        env_nested_delimiter = '__'
        case_sensitive = False

    def __init__(self, **data):
        super().__init__(**data)
        # 确保logging配置被正确初始化
        if not hasattr(self, 'logging'):
            self.logging = LoggingConfig()

    def to_string(self, indent: int = 0) -> str:
        """将配置转换为字符串"""
        indent_str = ' ' * indent
        result = []
        for field_name, field_value in self.__dict__.items():
            if hasattr(field_value, 'to_string'):
                result.append(
                    f"{indent_str}{field_name}:\n{field_value.to_string(indent + 4)}"
                )
            else:
                result.append(f"{indent_str}{field_name}: {field_value}")
        return '\n'.join(result)

    def _update_config_section(self, config_dict: dict, section: str,
                               config_class: type) -> None:
        """
        更新配置的某个部分
        
        Args:
            config_dict: 包含配置项的字典
            section: 配置部分名称
            config_class: 配置类
        """
        if section in config_dict:
            setattr(
                self, section,
                config_class(
                    **{
                        k: v
                        for k, v in config_dict[section].items()
                        if k in config_class.model_fields
                    }))

    def update_from_dict(self,
                         config_dict: dict,
                         partial: bool = False) -> None:
        """
        从字典更新配置
        
        Args:
            config_dict: 包含配置项的字典
            partial: 是否部分更新，默认为False
        """
        try:
            self._update_config_section(config_dict, 'app', AppConfig)
            self._update_config_section(config_dict, 'database',
                                        DatabaseConfig)
            self._update_config_section(config_dict, 'logging', LoggingConfig)
        except Exception as e:
            raise ValueError(f"配置更新失败: {e}")