"""note_revisions

Revision ID: 0014
Revises: 0013
Create Date: 2026-07-22

Version history: a snapshot of a note's title+body written on each edit that
changes either, so an accidental overwrite can be restored.
"""
from alembic import op
import sqlalchemy as sa
from sqlalchemy.dialects.postgresql import UUID

revision = "0014"
down_revision = "0013"
branch_labels = None
depends_on = None


def upgrade() -> None:
    op.create_table(
        "note_revisions",
        sa.Column("id", UUID(as_uuid=True), primary_key=True),
        sa.Column("note_id", UUID(as_uuid=True), sa.ForeignKey("notes.id", ondelete="CASCADE"), nullable=False),
        sa.Column("title", sa.Text(), nullable=True),
        sa.Column("body", sa.Text(), nullable=False, server_default=""),
        sa.Column("created_at", sa.DateTime(timezone=True), nullable=False, server_default=sa.func.now()),
    )
    op.create_index("ix_note_revisions_note_created", "note_revisions", ["note_id", "created_at"])


def downgrade() -> None:
    op.drop_index("ix_note_revisions_note_created", table_name="note_revisions")
    op.drop_table("note_revisions")