from typing import List, Optional, TYPE_CHECKING
if TYPE_CHECKING:
    from .inventory import Inventory

from sqlalchemy import Identity, Integer, Unicode
from sqlalchemy.orm import Mapped, mapped_column, relationship

from . import db

class Brand(db.Model):
    __tablename__ = 'Brands'

    id: Mapped[int] = mapped_column("ID", Integer, Identity(start=1, increment=1), primary_key=True)
    name: Mapped[Optional[str]] = mapped_column("Brand", Unicode(255), nullable=True)

    inventory: Mapped[List['Inventory']] = relationship('Inventory', back_populates='brand')

    def __init__(self, name: Optional[str] = None):
        self.name = name

    def __repr__(self):
        return f"<Brand(id={self.id}, name={repr(self.name)})>"
    
    def serialize(self):
        return {
            'id': self.id,
            'name': self.name
        }