"""Add indexes on hot filter/FK-cascade columns, and user.is_active.

Backend-perf audit (`scratchpad/audit/backend-perf.md` §4, M1): every
migration to date created zero indexes; `EXPLAIN QUERY PLAN` against the full
schema shows several hot paths doing a full table SCAN once the DB carries
more than a handful of rows per table (multi-workspace deployment, years of
FK-fetch history) — `planned_leave_day.count_by_parent_type` (2x per
parent+child in analytics and plan/apply), `count_dubbeldagar`,
`parental_leave_fetch.get_latest_by_parent`, and every FK-cascade column that
`ON DELETE CASCADE` walks on a GDPR delete. These 14 indexes cover exactly
those columns; see the audit for the full per-index rationale. Every
`CREATE INDEX` below is mirrored verbatim (same columns, same order, no
partial indexes) in `_FULL_SCHEMA` (`app/db/connection.py`) so
`tests/integration/test_schema_parity.py` — which compares index sets between
the Alembic chain and that hand-maintained DDL — stays green.

Also adds `user.is_active` (default 1): `AuthService.login` and
`get_user_from_token` already check `User.is_active` (account
deactivation), but the column never existed — every account was
unconditionally treated as active. This migration adds it and
`SQLiteUserRepository` now reads/writes it.

Revision ID: 011
Revises: 010
Create Date: 2026-09-18
"""

from __future__ import annotations

from alembic import op

revision: str = "011"
down_revision: str | None = "010"
branch_labels: str | None = None
depends_on: str | None = None

_UPGRADE_SQL = """
ALTER TABLE "user" ADD COLUMN is_active INTEGER NOT NULL DEFAULT 1;
CREATE INDEX idx_pld_parent_child_type_date
    ON planned_leave_day (parent_personal_data_uuid, child_id, day_type, date);
CREATE INDEX idx_pld_child_dubbeldag_date
    ON planned_leave_day (child_id, is_dubbeldag, date);
CREATE INDEX idx_pld_wish
    ON planned_leave_day (wish_id);
CREATE INDEX idx_plf_parent_child_fetched
    ON parental_leave_fetch (personal_data_uuid, child_id, fetched_at);
CREATE INDEX idx_plf_workspace
    ON parental_leave_fetch (workspace_id);
CREATE INDEX idx_plf_child
    ON parental_leave_fetch (child_id);
CREATE INDEX idx_leave_wish_workspace
    ON leave_wish (workspace_id);
CREATE INDEX idx_leave_wish_child
    ON leave_wish (child_id);
CREATE INDEX idx_leave_wish_parent
    ON leave_wish (parent_personal_data_uuid);
CREATE INDEX idx_child_workspace_birth
    ON child (workspace_id, birth_date);
CREATE INDEX idx_personal_data_workspace_deleted
    ON personal_data (workspace_id, deleted_at);
CREATE INDEX idx_invitation_workspace_status_created
    ON workspace_invitation (workspace_id, status, created_at);
CREATE INDEX idx_invitation_invited_by
    ON workspace_invitation (invited_by_user_id);
CREATE INDEX idx_vacation_days_workspace
    ON vacation_days (workspace_id);
"""

_DOWNGRADE_SQL = """
DROP INDEX idx_vacation_days_workspace;
DROP INDEX idx_invitation_invited_by;
DROP INDEX idx_invitation_workspace_status_created;
DROP INDEX idx_personal_data_workspace_deleted;
DROP INDEX idx_child_workspace_birth;
DROP INDEX idx_leave_wish_parent;
DROP INDEX idx_leave_wish_child;
DROP INDEX idx_leave_wish_workspace;
DROP INDEX idx_plf_child;
DROP INDEX idx_plf_workspace;
DROP INDEX idx_plf_parent_child_fetched;
DROP INDEX idx_pld_wish;
DROP INDEX idx_pld_child_dubbeldag_date;
DROP INDEX idx_pld_parent_child_type_date;
ALTER TABLE "user" DROP COLUMN is_active;
"""


def upgrade() -> None:
    from sqlalchemy import text

    for stmt in [s.strip() for s in _UPGRADE_SQL.split(";") if s.strip()]:
        op.execute(text(stmt))


def downgrade() -> None:
    from sqlalchemy import text

    for stmt in [s.strip() for s in _DOWNGRADE_SQL.split(";") if s.strip()]:
        op.execute(text(stmt))