/***********************************************************************************************************************************************************************
 * File Name    : notification.mdl.js
 * Type         : Sequelize Model
 * Description  : Admin-facing system notifications. Each row is a single event
 *                surfaced in the admin bell dropdown (e.g. "5 tasks overdue").
 *                Not user-scoped — visible to all admins.
 *
 * Author: Kenneth Obsequio (@lash0000)
 * Date Created: Jun. 19, 2026
 ***********************************************************************************************************************************************************************/
const { DataTypes } = require('sequelize');
const sequelize = require('../../config/db.config');
const mdl_Assets = require('../assets/assets.mdl');

const AdminNotification = sequelize.define('AdminNotification', {
    notification_id: {
        type: DataTypes.BIGINT,
        autoIncrement: true,
        primaryKey: true,
    },
    type: {
        type: DataTypes.STRING(64),
        allowNull: false,
    },
    title: {
        type: DataTypes.STRING(255),
        allowNull: false,
    },
    message: {
        type: DataTypes.TEXT,
        allowNull: false,
    },

    // Controls where this notification is rendered in the admin UI.
    show_in_notifications: {
      type: DataTypes.BOOLEAN,
      allowNull: false,
      defaultValue: true,
    },
    show_in_sticky: {
      type: DataTypes.BOOLEAN,
      allowNull: false,
      defaultValue: false,
    },

    // Named color key (utils/tierColors.js on the frontend) for the sticky banner.
    color: {
      type: DataTypes.STRING(20),
      allowNull: false,
      defaultValue: 'indigo',
    },

    // Denormalized copy of the source NotificationBroadcast's per-alert
    // layout image (see notification_broadcast.mdl.js) — null when the
    // alert has none.
    image_asset_id: {
      type: DataTypes.BIGINT,
      allowNull: true,
    },

    // Denormalized copy of the source NotificationBroadcast's visibility
    // window (see notificationVisibility.util.js) — null means unbounded.
    start_date: {
      type: DataTypes.DATE,
      allowNull: true,
    },
    end_date: {
      type: DataTypes.DATE,
      allowNull: true,
    },

    // Links back to the source broadcast so editing it after send can
    // propagate content changes into already-created rows (see
    // notificationBroadcasts.controller.js#updateBroadcast). Null for
    // notification types with no broadcast source.
    broadcast_id: {
      type: DataTypes.BIGINT,
      allowNull: true,
    },

    data: {
        type: DataTypes.JSONB,
        allowNull: true,
        defaultValue: null,
    },
    seen: {
        type: DataTypes.BOOLEAN,
        allowNull: false,
        defaultValue: false,
    },
    seen_at: {
        type: DataTypes.DATE,
        allowNull: true,
        defaultValue: null,
    },
}, {
    tableName: 'admin_notifications',
    timestamps: true,
    indexes: [
        { fields: ['seen'],       name: 'idx_an_seen' },
        { fields: ['type'],       name: 'idx_an_type' },
        { fields: ['createdAt'],  name: 'idx_an_created_at' },
    ],
});

AdminNotification.belongsTo(mdl_Assets, { as: "image", foreignKey: "image_asset_id" });

module.exports = AdminNotification;