"""I/O utilities for JSON and YAML file operations."""

import json
import os
from pathlib import Path
from typing import Any

import yaml


def load_json(path: str) -> Any:
    """Load a JSON file."""
    with open(path, "r", encoding="utf-8") as f:
        return json.load(f)


def save_json(data: Any, path: str, indent: int = 2) -> None:
    """Save data to a JSON file, creating parent dirs if needed."""
    ensure_dir(os.path.dirname(path))
    with open(path, "w", encoding="utf-8") as f:
        json.dump(data, f, ensure_ascii=False, indent=indent)


def ensure_dir(path: str) -> None:
    """Create directory if it doesn't exist."""
    if path:
        os.makedirs(path, exist_ok=True)


def load_yaml(path: str) -> dict:
    """Load a YAML config file."""
    with open(path, "r", encoding="utf-8") as f:
        return yaml.safe_load(f)


def get_model_name(base_model_config_path: str) -> str:
    """Extract model name from base model config for directory naming."""
    config = load_yaml(base_model_config_path)
    return os.path.basename(config["model_name_or_path"].rstrip("/"))