"""
Database Connection Management
"""
from contextlib import contextmanager
from sqlalchemy import create_engine
from sqlalchemy.orm import sessionmaker
from app import config

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

SessionLocal = sessionmaker(bind=engine)


def get_db():
    """Database session for FastAPI dependency injection"""
    db = SessionLocal()
    try:
        yield db
    finally:
        db.close()


@contextmanager
def get_db_session():
    """Database session for regular Python code"""
    db = SessionLocal()
    try:
        yield db
    finally:
        db.close()


def init_db():
    """Create all tables"""
    from database.models import Base

    print(f"[init_db] Initializing database at {config.DATABASE_URL}")
    Base.metadata.create_all(bind=engine)
    print(f"[init_db] Tables created: {list(Base.metadata.tables.keys())}")