import redis
import json
from ..core.config import settings
from typing import Any, Optional

class RedisCache:
    def __init__(self):
        self.redis_client = redis.Redis(
            host=settings.REDIS_HOST,
            port=settings.REDIS_PORT,
            decode_responses=True
        )

    async def set_cache(self, key: str, value: Any, expire: int = 3600):
        """Set a cache entry with optional expiration time (default 1 hour)"""
        try:
            self.redis_client.setex(
                key,
                expire,
                json.dumps(value)
            )
            return True
        except Exception as e:
            print(f"Cache set error: {str(e)}")
            return False

    async def get_cache(self, key: str) -> Optional[Any]:
        """Get a cached value by key"""
        try:
            value = self.redis_client.get(key)
            return json.loads(value) if value else None
        except Exception as e:
            print(f"Cache get error: {str(e)}")
            return None

    async def delete_cache(self, key: str) -> bool:
        """Delete a cache entry by key"""
        try:
            return bool(self.redis_client.delete(key))
        except Exception as e:
            print(f"Cache delete error: {str(e)}")
            return False

    async def clear_cache_pattern(self, pattern: str) -> bool:
        """Clear all cache entries matching a pattern"""
        try:
            keys = self.redis_client.keys(pattern)
            if keys:
                return bool(self.redis_client.delete(*keys))
            return True
        except Exception as e:
            print(f"Cache clear error: {str(e)}")
            return False

cache = RedisCache()