"""
Database configuration and setup for Hirely application
"""
import os
from sqlalchemy import create_engine
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import sessionmaker
from dotenv import load_dotenv

load_dotenv()

# Database URL - defaults to SQLite for development, PostgreSQL for production
DATABASE_URL = os.getenv(
    'DATABASE_URL', 
    'sqlite:///./hirely.db'  # Default to SQLite for easy development
)

# Create SQLAlchemy engine
engine = create_engine(
    DATABASE_URL,
    echo=True,  # Set to False in production
    connect_args={"check_same_thread": False} if "sqlite" in DATABASE_URL else {}
)

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

# Create Base class for models
Base = declarative_base()

def get_db():
    """
    Dependency to get database session
    """
    db = SessionLocal()
    try:
        yield db
    finally:
        db.close()

def create_tables():
    """
    Create all tables in the database
    """
    Base.metadata.create_all(bind=engine)

def drop_tables():
    """
    Drop all tables in the database (use with caution!)
    """
    Base.metadata.drop_all(bind=engine)