from datetime import datetime
from typing import Optional
from sqlalchemy.orm import Mapped, mapped_column, relationship
from sqlalchemy import Integer, String, DateTime, ForeignKey, func
from shared.db.base import Base


class MenuItem(Base):
    __tablename__ = "menu_items"

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)

    # Foreign key to posts table
    post_id: Mapped[int] = mapped_column(
        Integer,
        ForeignKey("posts.id", ondelete="CASCADE"),
        nullable=False,
        index=True
    )

    # Order for sorting menu items
    sort_order: Mapped[int] = mapped_column(Integer, nullable=False, default=0, index=True)

    # Timestamps
    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True),
        server_default=func.now(),
        nullable=False
    )
    updated_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True),
        server_default=func.now(),
        onupdate=func.now(),
        nullable=False
    )
    deleted_at: Mapped[Optional[datetime]] = mapped_column(
        DateTime(timezone=True),
        nullable=True
    )

    # Relationship to Post
    post: Mapped["Post"] = relationship("Post", back_populates="menu_items")