import os
from sqlalchemy import create_engine
from sqlalchemy.orm import sessionmaker, declarative_base
from dotenv import load_dotenv

load_dotenv()

DB_USER = os.getenv("DB_USER", "v2_usr_quiz")
DB_PASS = os.getenv("DB_PASS", "Quiz_Pass_2026_Secure!")
DB_HOST = os.getenv("DB_HOST", "db.waiswuaschd.de")
DB_PORT = os.getenv("DB_PORT", "3306")
DB_NAME = os.getenv("DB_NAME", "v2_db_quiz")

DATABASE_URL = f"mysql+pymysql://{DB_USER}:{DB_PASS}@{DB_HOST}:{DB_PORT}/{DB_NAME}?charset=utf8mb4"

engine = create_engine(
    DATABASE_URL,
    pool_size=10,
    max_overflow=20,
    pool_recycle=3600,
    pool_pre_ping=True
)

SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
Base = declarative_base()

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