-- CreateEnum
CREATE TYPE "NotificationDeliveryStatus" AS ENUM ('pending', 'success', 'failed');

-- AlterTable
ALTER TABLE "employees"
  ADD COLUMN "notification_push_enabled" BOOLEAN NOT NULL DEFAULT true;

-- CreateTable
CREATE TABLE "notification_deliveries" (
  "id" UUID NOT NULL,
  "notification_id" UUID NOT NULL,
  "channel_id" UUID NOT NULL,
  "status" "NotificationDeliveryStatus" NOT NULL,
  "attempt_no" INTEGER NOT NULL,
  "result_code" VARCHAR(64),
  "error_message" TEXT,
  "response_body" JSONB,
  "attempted_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,

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

-- AddForeignKey
ALTER TABLE "notification_deliveries"
  ADD CONSTRAINT "notification_deliveries_notification_id_fkey"
  FOREIGN KEY ("notification_id") REFERENCES "notifications"("id") ON DELETE CASCADE ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "notification_deliveries"
  ADD CONSTRAINT "notification_deliveries_channel_id_fkey"
  FOREIGN KEY ("channel_id") REFERENCES "notification_channels"("id") ON DELETE CASCADE ON UPDATE CASCADE;

-- CreateIndex
CREATE INDEX "idx_notification_deliveries_notification_attempted"
  ON "notification_deliveries"("notification_id", "attempted_at");

-- CreateIndex
CREATE INDEX "idx_notification_deliveries_channel_attempted"
  ON "notification_deliveries"("channel_id", "attempted_at");

-- CreateIndex
CREATE INDEX "idx_notification_deliveries_status_attempted"
  ON "notification_deliveries"("status", "attempted_at");