from sqlalchemy import create_engine, event
from sqlalchemy.orm import DeclarativeBase, sessionmaker

from app.config import settings


class Base(DeclarativeBase):
    pass


connect_args = {}
if settings.database_url.startswith("sqlite"):
    connect_args = {"check_same_thread": False, "timeout": 30}

engine = create_engine(
    settings.database_url,
    connect_args=connect_args,
    pool_pre_ping=True,
)

if settings.database_url.startswith("sqlite"):

    @event.listens_for(engine, "connect")
    def _sqlite_pragmas(dbapi_connection, _connection_record):
        cursor = dbapi_connection.cursor()
        cursor.execute("PRAGMA journal_mode=WAL")
        cursor.execute("PRAGMA foreign_keys=ON")
        cursor.close()


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


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