import os
from pathlib import Path
from dotenv import load_dotenv
from sqlalchemy import create_engine

load_dotenv(dotenv_path=Path(__file__).resolve().parent.parent / ".env")
from sqlalchemy.orm import sessionmaker, declarative_base

DATABASE_URL = os.environ.get("DATABASE_URL", "sqlite:///./test.db")

# Relative SQLite-Pfade immer relativ zu dieser Datei auflösen, nicht zum cwd
if DATABASE_URL.startswith("sqlite:///") and not DATABASE_URL.startswith("sqlite:////"):
    db_path = DATABASE_URL[len("sqlite:///"):]
    if not os.path.isabs(db_path):
        db_path = str(Path(__file__).resolve().parent / db_path)
        DATABASE_URL = f"sqlite:///{db_path}"

if "sqlite" in DATABASE_URL:
    engine = create_engine(DATABASE_URL, connect_args={"check_same_thread": False})
else:
    engine = create_engine(DATABASE_URL)

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

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