import redis
from dotenv import load_dotenv
import os
import pickle
import logging

logging.basicConfig(
    level=logging.INFO,
    format='%(asctime)s - %(levelname)s - %(message)s',
    handlers=[logging.FileHandler('logs/cache.log', encoding='utf-8'), logging.StreamHandler()]
)
logger = logging.getLogger(__name__)

load_dotenv()

class RedisCache:
    def __init__(self):
        try:
            self.client = redis.Redis(
                host=os.getenv('REDIS_HOST', 'localhost'),
                port=int(os.getenv('REDIS_PORT', 6379)),
                db=0,
                decode_responses=False
            )
            self.client.ping()
            logger.info("Connected to Redis")
        except Exception as e:
            logger.error(f"Failed to connect to Redis: {e}")
            raise
    
    def get(self, key):
        try:
            value = self.client.get(key)
            if value:
                return pickle.loads(value)
            return None
        except Exception as e:
            logger.error(f"Error retrieving from cache: {e}")
            return None
    
    def set(self, key, value, ttl=7200):
        try:
            self.client.setex(key, ttl, pickle.dumps(value))
        except Exception as e:
            logger.error(f"Error setting cache: {e}")