-- AlterTable
ALTER TABLE "policy_documents" ADD COLUMN     "next_review_at" TIMESTAMP(3),
ADD COLUMN     "review_cycle" TEXT;

-- CreateTable
CREATE TABLE "policy_acknowledgements" (
    "id" TEXT NOT NULL,
    "tenant_id" TEXT NOT NULL,
    "policy_document_id" TEXT NOT NULL,
    "version" TEXT NOT NULL,
    "user_id" TEXT NOT NULL,
    "acknowledged_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,

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

-- CreateTable
CREATE TABLE "policy_document_versions" (
    "id" TEXT NOT NULL,
    "tenant_id" TEXT NOT NULL,
    "policy_document_id" TEXT NOT NULL,
    "version" TEXT NOT NULL,
    "title" TEXT NOT NULL,
    "change_note" TEXT,
    "created_by" TEXT,
    "created_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,

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

-- CreateIndex
CREATE INDEX "policy_acknowledgements_tenant_id_idx" ON "policy_acknowledgements"("tenant_id");

-- CreateIndex
CREATE INDEX "policy_acknowledgements_policy_document_id_version_idx" ON "policy_acknowledgements"("policy_document_id", "version");

-- CreateIndex
CREATE UNIQUE INDEX "policy_acknowledgements_tenant_id_policy_document_id_user_i_key" ON "policy_acknowledgements"("tenant_id", "policy_document_id", "user_id", "version");

-- CreateIndex
CREATE INDEX "policy_document_versions_tenant_id_idx" ON "policy_document_versions"("tenant_id");

-- CreateIndex
CREATE INDEX "policy_document_versions_policy_document_id_idx" ON "policy_document_versions"("policy_document_id");

-- CreateIndex
CREATE INDEX "policy_documents_tenant_id_next_review_at_idx" ON "policy_documents"("tenant_id", "next_review_at");

-- AddForeignKey
ALTER TABLE "policy_acknowledgements" ADD CONSTRAINT "policy_acknowledgements_policy_document_id_fkey" FOREIGN KEY ("policy_document_id") REFERENCES "policy_documents"("id") ON DELETE CASCADE ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "policy_document_versions" ADD CONSTRAINT "policy_document_versions_policy_document_id_fkey" FOREIGN KEY ("policy_document_id") REFERENCES "policy_documents"("id") ON DELETE CASCADE ON UPDATE CASCADE;


-- AP5 — Row Level Security (F-04) für die neuen Mandanten-Tabellen.
ALTER TABLE "policy_acknowledgements" ENABLE ROW LEVEL SECURITY;
DROP POLICY IF EXISTS tenant_isolation ON "policy_acknowledgements";
CREATE POLICY tenant_isolation ON "policy_acknowledgements"
  USING ("tenant_id" = current_setting('app.tenant_id', true))
  WITH CHECK ("tenant_id" = current_setting('app.tenant_id', true));
ALTER TABLE "policy_acknowledgements" FORCE ROW LEVEL SECURITY;
ALTER TABLE "policy_document_versions" ENABLE ROW LEVEL SECURITY;
DROP POLICY IF EXISTS tenant_isolation ON "policy_document_versions";
CREATE POLICY tenant_isolation ON "policy_document_versions"
  USING ("tenant_id" = current_setting('app.tenant_id', true))
  WITH CHECK ("tenant_id" = current_setting('app.tenant_id', true));
ALTER TABLE "policy_document_versions" FORCE ROW LEVEL SECURITY;