from sqlalchemy import Column, Integer, String, ForeignKey, Sequence
from sqlalchemy.orm import relationship

from models import BaseModel, metadata

deal_rank_seq = Sequence('test_ochko', start=1, increment=1, metadata=metadata)

sequence = Sequence('my_sequence_name')


class Product(BaseModel):
    __tablename__ = 'products'
    id = Column(Integer, autoincrement=True, primary_key=True, index=True)
    name = Column(String, nullable=False, index=True)
    article = Column(String, nullable=False, index=True)

    client_id = Column(Integer, ForeignKey('clients.id'), nullable=False, comment='ID сделки')
    client = relationship('Client', back_populates='products')
    barcodes = relationship('ProductBarcode', back_populates='product', cascade="all, delete-orphan")


class ProductBarcode(BaseModel):
    __tablename__ = 'product_barcodes'
    product_id = Column(Integer, ForeignKey('products.id'), nullable=False, comment='ID товара', primary_key=True)
    product = relationship('Product', back_populates='barcodes')

    barcode = Column(String, nullable=False, index=True, comment='ШК товара', primary_key=True)