"""
Database and ORM configuration
"""
from sqlalchemy import create_engine
from sqlalchemy.orm import declarative_base, sessionmaker
from typing import Generator

from src.config.settings import settings

# Create database engine
engine = create_engine(
    settings.database_url,
    echo=settings.debug,
    pool_size=20,
    max_overflow=40,
    pool_pre_ping=True,
)

# Create session factory
SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)

# Base class for all models
Base = declarative_base()


def get_db() -> Generator:
    """Dependency for getting database session"""
    db = SessionLocal()
    try:
        yield db
    finally:
        db.close()


def init_db():
    """Initialize database tables"""
    Base.metadata.create_all(bind=engine)


def drop_db():
    """Drop all database tables (use with caution)"""
    Base.metadata.drop_all(bind=engine)