const cron = require("node-cron");
const { Op } = require("sequelize");
const { sequelize, notification, userNotification } = require("../app/models");

module.exports = function startCleanInactiveNotificationsCron() {
  const task = cron.schedule("0 0 * * *", async () => {
    const cutoff = new Date(Date.now() - Number(process.env.NOTIFICATION_RETENTION_DAYS || 90) * 86400000);
    for (;;) {
      const rows = await notification.findAll({ where: { isActive: false, updatedAt: { [Op.lt]: cutoff } }, attributes: ["notification_id"], limit: 500, order: [["updatedAt", "ASC"]] });
      if (!rows.length) break;
      const ids = rows.map((row) => row.notification_id);
      await sequelize.transaction(async (transaction) => { await userNotification.destroy({ where: { notification_id: { [Op.in]: ids } }, transaction }); await notification.destroy({ where: { notification_id: { [Op.in]: ids }, isActive: false }, transaction }); });
      if (rows.length < 500) break;
    }
  }, { scheduled: false });
  task.start(); return task;
};