-- R-P5 · Apps-Engine — RLS ROLLOUT ARTIFACT (deferred, NOT in the auto-migration)
-- =============================================================================
-- Companion to prisma/rls/tenant-isolation.sql (R-P2b) and the per-module RLS
-- blocks (file/task/hr/crypto). The Apps-Engine tables ship in the tracked merge
-- migration (created at main-merge per AD-21); this RLS block stays out of the
-- auto-migration path (activation = coordinated P5 cutover, not a schema diff).
--
-- IMPORTANT: `App` is a GLOBAL catalog table (no tenantId) → NO policy, NO RLS.
-- Only the tenant-scoped rows are isolated: DataConnection, AppSyncRun,
-- AppSyncRunLog, AppSyncItem, AppEntityBinding.
--
-- WHY DEFERRED: with RLS + FORCE on, any query WITHOUT `app.tenant_id` returns
-- ZERO rows. The dataConnection/appSync services always scope by
-- `where: { tenantId }` and run inside withTenantRLS(), so app-level scoping
-- carries isolation until the cutover (runtime role → hivegrid_app).
--
-- Forward-only (DoD 28). Inverse SQL as comment. Idempotent, DO-guarded (P3018).
--
-- Inverse per table:
--   REVOKE SELECT, INSERT, UPDATE, DELETE ON "<tbl>" FROM hivegrid_app;
--   DROP POLICY IF EXISTS "<tbl>_tenant_isolation" ON "<tbl>";
--   ALTER TABLE "<tbl>" NO FORCE ROW LEVEL SECURITY;
--   ALTER TABLE "<tbl>" DISABLE ROW LEVEL SECURITY;
-- =============================================================================

DO $$
DECLARE
  tbl text;
BEGIN
  FOREACH tbl IN ARRAY ARRAY['DataConnection', 'AppSyncRun', 'AppSyncRunLog', 'AppSyncItem', 'AppEntityBinding']
  LOOP
    EXECUTE format('ALTER TABLE %I ENABLE ROW LEVEL SECURITY;', tbl);
    EXECUTE format('ALTER TABLE %I FORCE ROW LEVEL SECURITY;', tbl);

    IF NOT EXISTS (
      SELECT 1 FROM pg_policies
      WHERE schemaname = current_schema()
        AND tablename = tbl
        AND policyname = tbl || '_tenant_isolation'
    ) THEN
      EXECUTE format(
        'CREATE POLICY %I ON %I USING ("tenantId" = current_setting(''app.tenant_id'', true)) WITH CHECK ("tenantId" = current_setting(''app.tenant_id'', true));',
        tbl || '_tenant_isolation', tbl
      );
    END IF;

    EXECUTE format('GRANT SELECT, INSERT, UPDATE, DELETE ON %I TO hivegrid_app;', tbl);
  END LOOP;

  -- App is global → the restricted role only ever reads the catalog.
  GRANT SELECT ON "App" TO hivegrid_app;
END
$$;

-- =============================================================================
-- Verify before the cutover migration (AGENTS.md §Prisma):
--   pnpm prisma validate · pnpm prisma migrate status
--   CI: prisma migrate deploy against an EMPTY DB (reproducible from scratch).
-- =============================================================================