from sqlalchemy import create_engine
from sqlalchemy.orm import sessionmaker, Session
from sqlalchemy.ext.declarative import declarative_base
from contextlib import contextmanager
from loguru import logger

from database.models import Base

DATABASE_URL = "sqlite:///./jira_analyses.db"

engine = create_engine(DATABASE_URL, connect_args={"check_same_thread": False})
SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)

def init_db():
    """Initializes the database by creating all tables."""
    logger.info("Initializing database...")
    Base.metadata.create_all(bind=engine)
    logger.info("Database initialized successfully.")

@contextmanager
def get_db():
    """Context manager to get a database session."""
    db = SessionLocal()
    try:
        yield db
    finally:
        db.close()

def get_db_session():
    """FastAPI dependency to get a database session."""
    db = SessionLocal()
    try:
        yield db
    finally:
        db.close()