from sqlalchemy import create_engine
from sqlalchemy.orm import sessionmaker, declarative_base
from app.core.settings import settings

if settings.cloud_sql_connection_name:
    # Cloud Run - PostgreSQL via Unix socket
    DATABASE_URL = (
        f"postgresql+psycopg://{settings.db_user}:{settings.db_password}@/{settings.db_name}"
        f"?host=/cloudsql/{settings.cloud_sql_connection_name}"
    )
else:
    # Ambiente local/VPN - PostgreSQL em host/porta configurados
    DATABASE_URL = (
        f"postgresql+psycopg://{settings.db_user}:{settings.db_password}@"
        f"{settings.db_host}:{settings.db_port}/{settings.db_name}"
    )

engine = create_engine(
    DATABASE_URL,
    pool_pre_ping=True,
    connect_args={"connect_timeout": 5} # Evita travar o startup por muito tempo
)

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

Base = declarative_base()