/***********************************************************************************************************************************************************************
 * File Name: notifications.data.js
 * Type of Program: Data
 * Description: Central registry of all notification types for both admin and
 *              client (user) notifications.
 *
 *              Each entry describes one notification type:
 *                type    {string}   — stored in the DB 'type' column
 *                scope   {string}   — 'admin' | 'user' | 'both'
 *                trigger {string}   — what fires it (cron | event | manual)
 *                build   {function} — takes a data payload, returns the object
 *                                    ready to pass to AdminNotification.create()
 *                                    or UserNotification.create() / bulkCreate()
 *
 *              To add a new notification type:
 *                1. Add an entry in the relevant section below.
 *                2. Call NOTIFICATION_REGISTRY.<key>.build(data) at the trigger
 *                   site (controller, cron, service).
 *                No other changes needed.
 *
 * Current types:
 *   Admin  : task_overdue, user_registration, nogrp_user_registered
 *   User   : user_task_overdue, achievement, course_unlocked,
 *            course_completed, certificate_issued, task_reminder, announcement,
 *            nogrp_welcome, tier_expired
 *
 * Author: Kenneth Obsequio (@lash0000)
 * Date Created: Jun. 19, 2026
 ***********************************************************************************************************************************************************************/
'use strict';

const { fmtDate } = require('../utils/datetime.util');

const NOTIFICATION_REGISTRY = {

    // ─────────────────────────────────────────────────────────────────────────
    //  ADMIN notifications  (scope: 'admin')
    // ─────────────────────────────────────────────────────────────────────────

    // ── Task ──────────────────────────────────────────────────────────────────
    task_overdue: {
        type:    'task_overdue',
        scope:   'admin',
        trigger: 'cron',
        build({ count, task_list_ids = [] }) {
            return {
                type:    'task_overdue',
                title:   'Tasks Overdue',
                message: `${count} task${count === 1 ? ' was' : 's were'} automatically marked as overdue.`,
                data:    { count, task_list_ids },
            };
        },
    },

    // ── User Registration ─────────────────────────────────────────────────────
    user_registration: {
        type:    'user_registration',
        scope:   'admin',
        trigger: 'event',
        build({ groupName, groupCode, userEmail }) {
            return {
                type:    'user_registration',
                title:   'New User Registered',
                message: `A new user registered in ${groupName}.`,
                data:    { groupName, groupCode, userEmail },
            };
        },
    },

    // ── Unaffiliated User Registration ───────────────────────────────────────
    nogrp_user_registered: {
        type:    'nogrp_user_registered',
        scope:   'admin',
        trigger: 'event',
        build({ userEmail, regType }) {
            return {
                type:    'nogrp_user_registered',
                title:   'New Unaffiliated User',
                message: `A new user (${userEmail}) registered via ${regType} without a group code and was placed in the default group.`,
                data:    { userEmail, regType },
            };
        },
    },

    // ─────────────────────────────────────────────────────────────────────────
    //  USER notifications  (scope: 'user')
    // ─────────────────────────────────────────────────────────────────────────

    // ── Task ──────────────────────────────────────────────────────────────────
    user_task_overdue: {
        type:    'task',
        scope:   'user',
        trigger: 'cron',
        build({ count, task_list_ids = [] }) {
            const label = count === 1 ? '1 task has' : `${count} tasks have`;
            return {
                type:    'task',
                title:   'Tasks Overdue',
                message: `${label} passed their deadline and been marked as overdue.`,
                data:    { count, task_list_ids },
            };
        },
    },

    task_reminder: {
        type:    'task',
        scope:   'user',
        trigger: 'cron',
        build({ taskName, deadline }) {
            return {
                type:    'task',
                title:   'Task Deadline Approaching',
                message: `"${taskName}" is due on ${fmtDate(deadline)}.`,
                data:    { taskName, deadline },
            };
        },
    },

    // ── Achievement ───────────────────────────────────────────────────────────
    achievement: {
        type:    'achievement',
        scope:   'user',
        trigger: 'event',
        build({ label, description, key }) {
            return {
                type:    'achievement',
                title:   label,
                message: description,
                data:    { key },
            };
        },
    },

    // ── Course ────────────────────────────────────────────────────────────────
    course_unlocked: {
        type:    'course',
        scope:   'user',
        trigger: 'event',
        build({ courseTitle }) {
            return {
                type:    'course',
                title:   'New Course Available',
                message: `"${courseTitle}" has been added to your learning library.`,
                data:    { courseTitle },
            };
        },
    },

    course_completed: {
        type:    'course',
        scope:   'user',
        trigger: 'event',
        build({ courseTitle }) {
            return {
                type:    'course',
                title:   'Course Completed',
                message: `Great job! You've completed "${courseTitle}". Your certificate will be issued within the next hour.`,
                data:    { courseTitle },
            };
        },
    },

    certificate_issued: {
        type:    'course',
        scope:   'user',
        trigger: 'cron',
        build({ courseTitle, courseUuid }) {
            return {
                type:    'course',
                title:   'Certificate Issued',
                message: `Congratulations! Your certificate for "${courseTitle}" is ready.`,
                data:    { courseTitle, courseUuid },
            };
        },
    },

    // ── Welcome ───────────────────────────────────────────────────────────────
    welcome: {
        type:    'announcement',
        scope:   'user',
        trigger: 'event',
        build({ groupName, groupCode, accType }) {
            const greeting = accType === 'admin'
                ? 'Welcome, Administrator!'
                : accType === 'staff'
                    ? 'Welcome to the Philproperties team!'
                    : 'Welcome to Philproperties!';
            return {
                type:    'announcement',
                title:   'Welcome to Philproperties',
                message: groupName ? `${greeting} You have been added to ${groupName}.` : greeting,
                data:    { groupName, groupCode, accType },
            };
        },
    },

    // ── No-Group Welcome ──────────────────────────────────────────────────────
    nogrp_welcome: {
        type:    'announcement',
        scope:   'user',
        trigger: 'event',
        build() {
            return {
                type:    'announcement',
                title:   "You're Not in a Group Yet",
                message: 'You are currently in the default group. Contact an administrator to be assigned to your team.',
                data:    { groupCode: 'NOGRP' },
            };
        },
    },

    // ── Assessment ────────────────────────────────────────────────────────────
    assessment_updated: {
        type:    'assessment',
        scope:   'user',
        trigger: 'event',
        build({ assessmentTitle, courseTitle }) {
            return {
                type:    'assessment',
                title:   'Assessment Updated',
                message: `The administrator has updated the "${assessmentTitle || 'Course Assessment'}" in "${courseTitle || 'your course'}". Your current session is still valid — continue where you left off.`,
                data:    { assessmentTitle, courseTitle },
            };
        },
    },

    // ── Platform ──────────────────────────────────────────────────────────────
    announcement: {
        type:    'announcement',
        scope:   'user',
        trigger: 'manual',
        build({ title, body }) {
            return {
                type:    'announcement',
                title,
                message: body,
                data:    {},
            };
        },
    },

    // ── Tier ──────────────────────────────────────────────────────────────────
    tier_expired: {
        type:    'tier_expired',
        scope:   'user',
        trigger: 'cron',
        build({ tier, label }) {
            return {
                type:    'tier_expired',
                title:   'Subscription Expired',
                message: `Your ${label ?? tier} plan has expired. Renew to keep access.`,
                data:    { tier, label },
            };
        },
    },

};

module.exports = { NOTIFICATION_REGISTRY };