import os
import sys
from sqlalchemy import Column, ForeignKey, Integer, String
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import relationship, backref
from sqlalchemy import create_engine

Base = declarative_base()


class User(Base):
    __tablename__ = 'user'

    id = Column(Integer, primary_key=True)
    name = Column(String(250), nullable=False)
    email = Column(String(250), nullable=False)

class Instrument(Base):
    __tablename__ = 'instrument'

    id = Column(Integer, primary_key=True)
    name = Column(String(250), nullable=False)
    user_id = Column(Integer, ForeignKey('user.id'))
    user = relationship(User)
    @property
    def serialize(self):
        """Return object data in easily serializeable format"""
        return {
            'name': self.name,
            'id': self.id,
        }


class MenuItem(Base):
    __tablename__ = 'menu_item'

    name = Column(String(80), nullable=False)
    id = Column(Integer, primary_key=True)
    description = Column(String(250))
    price = Column(String(8))
    instrument_id = Column(Integer, ForeignKey('instrument.id'))
    instrument = relationship(Instrument, backref=backref('item', cascade='all, delete'))
    user_id = Column(Integer, ForeignKey('user.id'))
    user = relationship(User)

    @property
    def serialize(self):
        """Return object data in easily serializeable format"""
        return {
            'name': self.name,
            'description': self.description,
            'id': self.id,
            'price': self.price,
            'user_id': self.user_id
        }


engine = create_engine('postgresql://catalog:udacity@localhost/catalog')


Base.metadata.create_all(engine)
