from typing import Optional
from sqlalchemy import ForeignKey, Text, Index
from sqlalchemy.orm import Mapped, mapped_column, relationship
from sqlalchemy.dialects.postgresql import TSVECTOR
from db.base import Base


class Category(Base):
    __tablename__ = "categories"

    id: Mapped[int] = mapped_column(primary_key=True, autoincrement=True)
    name: Mapped[Optional[str]] = mapped_column(Text)
    parent_id: Mapped[Optional[int]] = mapped_column(ForeignKey("categories.id"))

    parent: Mapped["Category"] = relationship("Category", remote_side=[id])


class Product(Base):
    __tablename__ = "products"

    id: Mapped[int] = mapped_column(primary_key=True, autoincrement=True)
    category_id: Mapped[Optional[int]] = mapped_column(ForeignKey("categories.id"))
    name: Mapped[Optional[str]] = mapped_column(Text)
    description: Mapped[Optional[str]] = mapped_column(Text)

    search_vector: Mapped[str] = mapped_column(TSVECTOR)

    __table_args__ = (
        Index("idx_products_search", "search_vector", postgresql_using="gin"),
    )