"""Game configuration and settings management."""
import json
from pathlib import Path
from typing import Dict, Any


class GameConfig:
    """Manages game configuration and user preferences."""

    def __init__(self):
        self.config_file = Path.home() / '.snake_config.json'
        self.config: Dict[str, Any] = self._get_defaults()
        self.load_config()

    def _get_defaults(self) -> Dict[str, Any]:
        """Get default configuration."""
        return {
            'snake_length': 3,
            'snake_speed': 7,
            'enable_effects': True,
            'enable_music': False,
            'head_char': '█',
            'body_char': '▓',
            'food_char': '█',
        }

    def load_config(self) -> None:
        """Load configuration from file."""
        if self.config_file.exists():
            try:
                with open(self.config_file, 'r') as f:
                    loaded = json.load(f)
                    # Merge with defaults to ensure all keys exist
                    self.config = {**self._get_defaults(), **loaded}
            except (json.JSONDecodeError, IOError):
                self.save_config()
        else:
            self.save_config()

    def save_config(self) -> None:
        """Save configuration to file."""
        try:
            with open(self.config_file, 'w') as f:
                json.dump(self.config, f, indent=2)
        except IOError as e:
            print(f"Warning: Could not save config: {e}")

    def get(self, key: str, default: Any = None) -> Any:
        """Get a configuration value."""
        return self.config.get(key, default)

    def set(self, key: str, value: Any) -> None:
        """Set a configuration value."""
        self.config[key] = value
        self.save_config()

    def get_all(self) -> Dict[str, Any]:
        """Get all configuration."""
        return self.config.copy()