from ScEpTIC.config.base_config import ScEpTICBaseConfig
from ScEpTIC.AST.transformations import CONFIG_FUNCTION_NAME

class ASTTransformationsConfig(ScEpTICBaseConfig):
    """
    Configuration for AST Transformations
    """
    _config_domain = {
        'transformations': {'class': str, 'mode': 'add'},
    }


    def __init__(self, main_config):
        super().__init__(main_config)
        self.transformations = []

        self._register_config_callback("transformations", self._transformation_callback)

        self.add_config('transformations', 'base')


    def _transformation_callback(self, config_name, config_value):
        """
        Callback to add transformation configuration
        :param config_name: the configuration name
        :param config_value: the configuration value
        """
        module_name = 'ScEpTIC.AST.transformations.{}.config'.format(config_value)
        module = __import__(module_name, fromlist=[CONFIG_FUNCTION_NAME])
        config = getattr(module, CONFIG_FUNCTION_NAME)
        setattr(self, config_value, config(self._main_config))