ALTER TABLE "portal_announcements"
  ADD COLUMN "category" TEXT NOT NULL DEFAULT 'general',
  ADD COLUMN "requires_acknowledgement" BOOLEAN NOT NULL DEFAULT false,
  ADD COLUMN "acknowledgement_statement" TEXT,
  ADD COLUMN "acknowledgement_due_at" TIMESTAMP(3);

CREATE TABLE "portal_announcement_acknowledgements" (
    "id" UUID NOT NULL,
    "announcement_id" UUID NOT NULL,
    "employee_id" UUID NOT NULL,
    "acknowledged_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
    "statement_snapshot" TEXT NOT NULL,
    "title_snapshot" TEXT NOT NULL,
    "summary_snapshot" TEXT NOT NULL,
    "actor_id" UUID NOT NULL,
    "created_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,

    CONSTRAINT "portal_announcement_acknowledgements_pkey" PRIMARY KEY ("id")
);

CREATE UNIQUE INDEX "portal_announcement_acknowledgements_announcement_id_employee_id_key"
    ON "portal_announcement_acknowledgements"("announcement_id", "employee_id");

CREATE INDEX "portal_announcement_acknowledgements_employee_id_acknowledged_at_idx"
    ON "portal_announcement_acknowledgements"("employee_id", "acknowledged_at");

CREATE INDEX "portal_announcement_acknowledgements_announcement_id_acknowledged_at_idx"
    ON "portal_announcement_acknowledgements"("announcement_id", "acknowledged_at");

ALTER TABLE "portal_announcement_acknowledgements"
    ADD CONSTRAINT "portal_announcement_acknowledgements_announcement_id_fkey"
    FOREIGN KEY ("announcement_id") REFERENCES "portal_announcements"("id")
    ON DELETE CASCADE ON UPDATE CASCADE;

ALTER TABLE "portal_announcement_acknowledgements"
    ADD CONSTRAINT "portal_announcement_acknowledgements_employee_id_fkey"
    FOREIGN KEY ("employee_id") REFERENCES "employees"("id")
    ON DELETE RESTRICT ON UPDATE CASCADE;

ALTER TABLE "portal_announcement_acknowledgements"
    ADD CONSTRAINT "portal_announcement_acknowledgements_actor_id_fkey"
    FOREIGN KEY ("actor_id") REFERENCES "employees"("id")
    ON DELETE RESTRICT ON UPDATE CASCADE;