from __future__ import annotations

from datetime import datetime

from sqlalchemy import Integer, String, Text, DateTime, ForeignKey, UniqueConstraint, Index, func
from sqlalchemy.orm import Mapped, mapped_column

from db.base import Base


class Snippet(Base):
    __tablename__ = "snippets"
    __table_args__ = (
        UniqueConstraint("user_id", "name", name="uq_snippets_user_name"),
        Index("ix_snippets_visibility", "visibility"),
    )

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    user_id: Mapped[int] = mapped_column(
        ForeignKey("users.id", ondelete="CASCADE"), nullable=False,
    )
    name: Mapped[str] = mapped_column(String(255), nullable=False)
    value: Mapped[str] = mapped_column(Text, nullable=False)
    visibility: Mapped[str] = mapped_column(
        String(20), nullable=False, default="private", server_default="private",
    )
    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), nullable=False, server_default=func.now(),
    )
    updated_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), nullable=False, server_default=func.now(), onupdate=func.now(),
    )