from sqlalchemy import create_engine
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import sessionmaker
from pydantic_settings import BaseSettings
from typing import Optional


class Settings(BaseSettings):
    DATABASE_URL: str = "mysql+pymysql://harborforge:harborforge_pass@mysql:3306/harborforge"
    SECRET_KEY: str = "change-me-in-production"
    LOG_LEVEL: str = "INFO"
    ALGORITHM: str = "HS256"
    ACCESS_TOKEN_EXPIRE_MINUTES: int = 30

    class Config:
        env_file = ".env"


settings = Settings()

engine = create_engine(settings.DATABASE_URL, 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()