from sqlalchemy import Column, Integer, String, Date, ForeignKey, DateTime, func
from sqlalchemy.orm import relationship
from .database import Base


class Collection(Base):
    __tablename__ = "collections"

    id = Column(Integer, primary_key=True, index=True, autoincrement=True)
    name = Column(String, nullable=False)
    short_code = Column(String, unique=True, nullable=True)
    created_at = Column(DateTime, server_default=func.now())

    stocks = relationship(
        "CollectionStock",
        back_populates="collection",
        cascade="all, delete-orphan",
    )


class CollectionStock(Base):
    __tablename__ = "collection_stocks"

    id = Column(Integer, primary_key=True, index=True, autoincrement=True)
    collection_id = Column(Integer, ForeignKey("collections.id", ondelete="CASCADE"), nullable=False)
    stock_code = Column(String, nullable=False)
    stock_name = Column(String, nullable=False)
    added_date = Column(Date, nullable=False)

    collection = relationship("Collection", back_populates="stocks")