"""drop note_links — [[wiki-links]] are removed

Revision ID: 0024
Revises: 0023
Create Date: 2026-08-22

0023 stays in the chain: removing an applied revision would strand a database's
alembic_version pointer.

note_links was derived from note bodies, so nothing typed is lost; the `[[text]]` is
still in every body.
"""
from alembic import op
import sqlalchemy as sa
from sqlalchemy.dialects import postgresql

revision = "0024"
down_revision = "0023"
branch_labels = None
depends_on = None


def upgrade() -> None:
    op.drop_table("note_links")


def downgrade() -> None:
    op.create_table(
        "note_links",
        sa.Column("id", postgresql.UUID(as_uuid=True), primary_key=True),
        sa.Column(
            "source_id",
            postgresql.UUID(as_uuid=True),
            sa.ForeignKey("notes.id", ondelete="CASCADE"),
            nullable=False,
        ),
        sa.Column(
            "target_id",
            postgresql.UUID(as_uuid=True),
            sa.ForeignKey("notes.id", ondelete="SET NULL"),
            nullable=True,
        ),
        sa.Column("target_norm", sa.Text(), nullable=False),
    )
    op.create_index("ix_note_links_target", "note_links", ["target_norm"])
    op.create_index("ix_note_links_target_id", "note_links", ["target_id"])