from sqlalchemy import create_engine, Column, Integer, String, Text, DateTime
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import sessionmaker
from datetime import datetime
from config import settings

# Create database engine
engine = create_engine(settings.DATABASE_URL)
SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)

Base = declarative_base()

class Message(Base):
    __tablename__ = "messages"
    
    id = Column(Integer, primary_key=True, index=True)
    message = Column(Text, nullable=False)
    sender = Column(String(255), nullable=False)
    item_id = Column(Integer, nullable=True)
    amount = Column(Integer, nullable=True)
    created_at = Column(DateTime, default=datetime.utcnow)

class Transaction(Base):
    __tablename__ = "transactions"
    
    id = Column(Integer, primary_key=True, index=True)
    item_id = Column(Integer, nullable=False)
    item = Column(String(255), nullable=False)
    user = Column(String(255), nullable=False)
    amount = Column(Integer, nullable=False)
    created_at = Column(DateTime, default=datetime.utcnow)

# Create tables
def create_tables():
    Base.metadata.create_all(bind=engine)

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