from motor.motor_asyncio import AsyncIOMotorClient
from app.config import config
from app.utils.logger import logger


class MongoDB:
    def __init__(self):
        self.client = None
        self.db = None
        
    async def connect(self):
        if self.client is None:
            mongo_url = config["database"]["mongodb"]["url"]
            db_name = config["database"]["mongodb"]["db_name"]
            
            self.client = AsyncIOMotorClient(mongo_url)
            self.db = self.client[db_name]
            
            await self.client.admin.command('ping')
            logger.info(f"MongoDB connected to database: {db_name}")
        
        return self.db
    
    async def disconnect(self):
        if self.client:
            self.client.close()
            logger.info("MongoDB disconnected")
    
    def get_collection(self, collection_name: str = None):
        if collection_name is None:
            collection_name = config["database"]["mongodb"]["collection"]
        
        if self.db is None:
            raise RuntimeError("MongoDB not connected. Call await connect() first.")
        
        return self.db[collection_name]
    
    async def get_db(self):
        if self.db is None:
            await self.connect()
        return self.db


mongodb = MongoDB()