"""Persist Application.default_knowledge_space_ids, previously accepted by the
control-plane API and echoed back in the same create/read response but
silently discarded on every subsequent round-trip -- the `applications`
table had no column or table for it at all.

A join table (mirroring `grants`'s own application<->space composite-FK
shape) rather than a JSON array column: this is a real many-to-many
relationship the domain already models as a `frozenset[UUID]`, and every
other application<->space relationship in this schema (`grants`) already
uses a join table, not a JSON column.
"""

from __future__ import annotations

import sqlalchemy as sa
from alembic import op

revision = "0015_application_default_spaces"
down_revision = "0014_document_space"
branch_labels = None
depends_on = None


def upgrade() -> None:
    op.create_table(
        "application_default_spaces",
        sa.Column("application_id", sa.Uuid(), primary_key=True),
        sa.Column("workspace_id", sa.Uuid(), nullable=False),
        sa.Column("knowledge_space_id", sa.Uuid(), primary_key=True),
        sa.ForeignKeyConstraint(
            ["application_id", "workspace_id"],
            ["control.applications.id", "control.applications.workspace_id"],
            ondelete="CASCADE",
        ),
        sa.ForeignKeyConstraint(
            ["knowledge_space_id", "workspace_id"],
            ["control.spaces.id", "control.spaces.workspace_id"],
            ondelete="CASCADE",
        ),
        schema="control",
    )


def downgrade() -> None:
    op.drop_table("application_default_spaces", schema="control")