import os
import yaml

DEFAULT_CONFIG_PATH = os.path.expanduser("~/.config/loopaware/infra-cli.yaml")

class Config:
    def __init__(self, config_path=None):
        self.path = config_path or os.environ.get("INFRA_CONFIG") or DEFAULT_CONFIG_PATH
        self.data = self._load()

    def _load(self):
        if not os.path.exists(self.path):
            # Fallback to local config if exists
            if os.path.exists("config.yaml"):
                self.path = "config.yaml"
            else:
                raise FileNotFoundError(f"Config file not found at {self.path}. Please create it based on config.yaml.example")
        
        with open(self.path, 'r') as f:
            return yaml.safe_vars(f) if hasattr(yaml, 'safe_vars') else yaml.safe_load(f)

    def get(self, key, default=None):
        parts = key.split('.')
        val = self.data
        for part in parts:
            if isinstance(val, dict) and part in val:
                val = val[part]
            else:
                return default
        return val