import os
from sqlalchemy import create_engine
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import sessionmaker

# MySQL Connection Config (Env Vars with defaults)
DB_USER = os.environ.get("DB_USER", "admin")
DB_PASSWORD = os.environ.get("DB_PASSWORD", "Seigakushakorea0308(!")
DB_HOST = os.environ.get("DB_HOST", "localhost")
DB_PORT = os.environ.get("DB_PORT", "3306")
DB_NAME = os.environ.get("DB_NAME", "bible_db")

SQLALCHEMY_DATABASE_URL = f"mysql+pymysql://{DB_USER}:{DB_PASSWORD}@{DB_HOST}:{DB_PORT}/{DB_NAME}"

engine = create_engine(SQLALCHEMY_DATABASE_URL)
SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)

Base = declarative_base()

def get_db():
    db = SessionLocal()
    try:
        yield db
    finally:
        db.close()