from __future__ import annotations

import uuid

from sqlalchemy import ForeignKey, Index, Text
from sqlalchemy.dialects.postgresql import UUID
from sqlalchemy.orm import Mapped, mapped_column

from . import Base


class NoteLink(Base):
    """A [[wiki-link]] from a source note to a target title (normalized). Resolved
    to a target note by matching target_norm against lower(trim(note.title))."""

    __tablename__ = "note_links"
    __table_args__ = (Index("ix_note_links_target", "target_norm"),)

    id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
    source_id: Mapped[uuid.UUID] = mapped_column(
        UUID(as_uuid=True), ForeignKey("notes.id", ondelete="CASCADE"), nullable=False
    )
    target_norm: Mapped[str] = mapped_column(Text(), nullable=False)