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


class MenuNode(Base):
    __tablename__ = "menu_nodes"

    __table_args__ = (
        Index("ix_menu_nodes_container", "container_type", "container_id"),
        Index("ix_menu_nodes_parent_id", "parent_id"),
    )

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

    container_type: Mapped[str] = mapped_column(String(32), nullable=False)
    container_id: Mapped[int] = mapped_column(Integer, nullable=False)

    parent_id: Mapped[Optional[int]] = mapped_column(
        Integer,
        ForeignKey("menu_nodes.id", ondelete="SET NULL"),
        nullable=True,
    )

    sort_order: Mapped[int] = mapped_column(Integer, nullable=False, default=0)
    depth: Mapped[int] = mapped_column(Integer, nullable=False, default=0)

    label: Mapped[str] = mapped_column(String(255), nullable=False)
    slug: Mapped[Optional[str]] = mapped_column(String(255), nullable=True)
    href: Mapped[Optional[str]] = mapped_column(String(1024), nullable=True)
    icon: Mapped[Optional[str]] = mapped_column(String(64), nullable=True)
    feature_image: Mapped[Optional[str]] = mapped_column(Text, nullable=True)

    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,
    )
