"""
Domain Layer - Cache Interface

Defines contract for caching implementations.
"""
from abc import ABC, abstractmethod
from typing import Any, Optional


class ICache(ABC):
    """Interface for cache implementations"""

    @abstractmethod
    async def get(self, key: str) -> Optional[Any]:
        """Get value from cache"""
        pass

    @abstractmethod
    async def set(self, key: str, value: Any, ttl: Optional[int] = None) -> bool:
        """Set value in cache"""
        pass

    @abstractmethod
    async def delete(self, key: str) -> bool:
        """Delete key from cache"""
        pass

    @abstractmethod
    async def exists(self, key: str) -> bool:
        """Check if key exists"""
        pass

    @abstractmethod
    async def clear(self, pattern: str = "*") -> int:
        """Clear cache by pattern"""
        pass