from sqlalchemy import create_engine, Column, Integer, Integer, String, Text
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import sessionmaker

DATABASE_URL = "sqlite:///./app.db"
engine = create_engine(DATABASE_URL, connect_args={"check_same_thread": False})
SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
Base = declarative_base()

class User(Base):
    __tablename__ = "users"
    id = Column(Integer, primary_key=True, index=True)
    username = Column(String(255), nullable=False)
    email = Column(String(255), nullable=False)
    password_hash = Column(Text, nullable=False)

class Article(Base):
    __tablename__ = "articles"
    id = Column(Integer, primary_key=True, index=True)
    title = Column(String(255), nullable=False)
    content = Column(Text, nullable=False)
    author_id = Column(Integer, nullable=False)

class Comment(Base):
    __tablename__ = "comments"
    id = Column(Integer, primary_key=True, index=True)
    content = Column(Text, nullable=False)
    article_id = Column(Integer, nullable=False)
    author_id = Column(Integer, nullable=False)

Base.metadata.create_all(bind=engine)