# src/core/database.py
from sqlalchemy.ext.asyncio import AsyncSession, create_async_engine, async_sessionmaker
from sqlalchemy.orm import DeclarativeBase
import os
from dotenv import load_dotenv

load_dotenv(".env")

DB_USER = os.getenv("DB_USER", "root")
DB_PASSWORD = os.getenv("DB_PASSWORD", "password")
DB_HOST = os.getenv("DB_HOST", "localhost")
DB_PORT = os.getenv("DB_PORT", "3306")
DB_NAME = os.getenv("DB_NAME", "mydb")

DATABASE_URL = f"mysql+aiomysql://{DB_USER}:{DB_PASSWORD}@{DB_HOST}:{DB_PORT}/{DB_NAME}"

engine = create_async_engine(DATABASE_URL, echo=True)

async_session = async_sessionmaker(
    bind=engine,
    expire_on_commit=False,
    class_=AsyncSession,
)

# Базовий клас для моделей
class Base(DeclarativeBase):
    pass

# Dependency для FastAPI
async def get_db() -> AsyncSession:
    async with async_session() as session:
        yield session