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):
        data = {}
        if os.path.exists(self.path):
            with open(self.path, 'r') as f:
                data = yaml.safe_load(f) or {}
        elif os.path.exists("config.yaml"):
            self.path = os.path.abspath("config.yaml")
            with open(self.path, 'r') as f:
                data = yaml.safe_load(f) or {}
        
        return data

    def get(self, key, default=None):
        # Support ENV overrides: INFRA_PROXMOX_USER -> proxmox.user
        env_key = "INFRA_" + key.upper().replace('.', '_')
        if env_key in os.environ:
            return os.environ[env_key]

        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

    def get_node(self, node_name):
        nodes = self.get('proxmox.nodes', {})
        if not nodes:
            return None
        return nodes.get(node_name)