"""File handling service - streamlined version."""

import os
import pickle
import tempfile
from typing import Any
import yaml


class FileService:
    """Handle file operations."""

    def load_pickle_user_path(self, filepath: str) -> Any:
        """Pickle from user-controlled path."""
        with open(filepath, "rb") as f:
            return pickle.load(f)

    def load_pickle_fixed_path(self) -> Any:
        """Pickle from known internal path."""
        with open("/etc/app/cache.pkl", "rb") as f:
            return pickle.load(f)

    def save_temp_insecure(self, data: bytes) -> str:
        """Predictable temp file."""
        filepath = f"/tmp/data_{os.getpid()}.dat"
        with open(filepath, "wb") as f:
            f.write(data)
        return filepath

    def save_temp_secure(self, data: bytes) -> str:
        """Secure temp file creation."""
        with tempfile.NamedTemporaryFile(delete=False) as f:
            f.write(data)
            return f.name

    def load_yaml_unsafe(self, yaml_string: str) -> Any:
        """Unsafe YAML loader."""
        return yaml.load(yaml_string, Loader=yaml.Loader)

    def load_yaml_safe(self, yaml_string: str) -> Any:
        """SafeLoader is secure."""
        return yaml.safe_load(yaml_string)