import os
from sqlalchemy import create_engine, event
from sqlalchemy.orm import sessionmaker, declarative_base
from sqlalchemy.engine import Engine
from .config import get_settings

settings = get_settings()

if settings.DATABASE_URL.startswith("sqlite"):
    db_path = settings.DATABASE_URL.replace("sqlite:///", "")
    os.makedirs(
        os.path.dirname(db_path) if os.path.dirname(db_path) else ".", exist_ok=True
    )

    @event.listens_for(Engine, "connect")
    def set_sqlite_pragma(dbapi_conn, connection_record):
        cursor = dbapi_conn.cursor()
        cursor.execute("PRAGMA foreign_keys=ON")
        cursor.close()


engine = create_engine(
    settings.DATABASE_URL,
    connect_args={"check_same_thread": False}
    if settings.DATABASE_URL.startswith("sqlite")
    else {},
    echo=settings.DEBUG,
)

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

Base = declarative_base()


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