// models/notifications/notification_broadcast.mdl.js
const { DataTypes } = require("sequelize");
const sequelize = require("../../config/db.config");
const mdl_Users = require("../users/users.mdl");
const mdl_Assets = require("../assets/assets.mdl");

const NotificationBroadcast = sequelize.define("NotificationBroadcast", {

  // ─── Identity ─────────────────────────────────────────────────────────────
  broadcast_id: { type: DataTypes.BIGINT, primaryKey: true, autoIncrement: true, label: "Broadcast ID", order: 0, hidden: true },
  uuid: { type: DataTypes.UUID, defaultValue: DataTypes.UUIDV4, allowNull: false, unique: true, label: "UUID", order: 0, hidden: true },

  // ─── Content ──────────────────────────────────────────────────────────────
  title: { type: DataTypes.STRING(255), allowNull: false, label: "Title", order: 1 },
  // Only used by Notifications-type alerts (show_in_notifications) — Sticky
  // alerts (show_in_sticky) are title-only and leave this null.
  message: { type: DataTypes.TEXT, allowNull: true, label: "Message", order: 1.5 },
  // When set, the client's "view full content" dialog shows an "Open Link"
  // action pointing here. When null, that dialog is plain text info only.
  link_url: { type: DataTypes.STRING(2048), allowNull: true, label: "Link URL", order: 2.2 },
  // Custom CTA button text shown right after the title in the sticky banner
  // (e.g. "Shop now"). Falls back to "Open Link" when unset.
  link_label: { type: DataTypes.STRING(60), allowNull: true, label: "Button Label", order: 2.3 },

  // Named color key (see utils/tierColors.js on the frontend) driving the
  // sticky banner's panel background/border — same registry rewards/tiers use.
  color: { type: DataTypes.STRING(20), allowNull: false, defaultValue: 'indigo', label: "Color", order: 2.4 },

  // Optional per-alert image shown in the click-through details dialog when
  // opened from the sticky banner (see AnnouncementCarouselDialog on the
  // frontend). Replaces the old shared sticky_banner_settings singleton.
  image_asset_id: { type: DataTypes.BIGINT, allowNull: true, label: "Layout Image", order: 2.45 },

  // Optional visibility window. Null start_date = show immediately once sent;
  // null end_date = show indefinitely. Copied onto AdminNotification/
  // UserNotification rows at send time so client reads can filter without
  // joining back to this table (see sendBroadcast + notificationVisibility.util.js).
  start_date: { type: DataTypes.DATE, allowNull: true, label: "Start Date", order: 2.7 },
  end_date: { type: DataTypes.DATE, allowNull: true, label: "End Date", order: 2.8 },

  // ─── Visibility ──────────────────────────────────────────────────────────
  // Determines where a delivered announcement shows up for recipients.
  // - show_in_sticky: client sticky banner (fixed top)
  // - show_in_notifications: client + admin notifications lists/bells
  show_in_sticky: { type: DataTypes.BOOLEAN, allowNull: false, defaultValue: false, label: "Show in Sticky Alerts", order: 2.5 },
  show_in_notifications: { type: DataTypes.BOOLEAN, allowNull: false, defaultValue: true, label: "Show in Notifications", order: 2.6 },

  // ─── Targeting ────────────────────────────────────────────────────────────
  target_type: {
    type: DataTypes.ENUM("admin", "user", "both", "task_list", "course", "tier_plan"),
    allowNull: false,
    label: "Target", order: 3
  },
  // Holds a task list UUID, course UUID, or tier plan ID (stringified) — only
  // set when target_type is 'task_list' / 'course' / 'tier_plan'.
  target_id: { type: DataTypes.STRING(64), allowNull: true, label: "Target ID", order: 3.5 },

  // ─── Lifecycle ────────────────────────────────────────────────────────────
  status: {
    type: DataTypes.ENUM("draft", "sent", "archived"),
    allowNull: false,
    defaultValue: "draft", label: "Status", order: 4
  },
  sent_at: { type: DataTypes.DATE, allowNull: true, label: "Sent At", order: 5 },
  recipient_count: { type: DataTypes.INTEGER, allowNull: false, defaultValue: 0, label: "Recipients", order: 6 },

  // ─── Audit trails ─────────────────────────────────────────────────────────
  createdBy: { type: DataTypes.BIGINT, allowNull: true, label: "Created By" },
  updatedBy: { type: DataTypes.BIGINT, allowNull: true, label: "Modified By" },
  deletedBy: { type: DataTypes.BIGINT, allowNull: true, label: "Deleted By" },
}, {
  tableName: "notification_broadcasts",
  timestamps: true,   // createdAt, updatedAt
  paranoid: true,
  indexes: [
    { fields: ["uuid"] },
    { fields: ["status"] },
    { fields: ["target_type"] },
    { fields: ["deletedAt"] },
  ],
});

NotificationBroadcast.belongsTo(mdl_Users, { as: "creator", foreignKey: "createdBy" });
NotificationBroadcast.belongsTo(mdl_Users, { as: "updater", foreignKey: "updatedBy" });
NotificationBroadcast.belongsTo(mdl_Assets, { as: "image", foreignKey: "image_asset_id" });

module.exports = NotificationBroadcast;