/***********************************************************************************************************************************************************************
 * File Name    : expire_user_tiers.cron.js
 * Type         : Cron Job
 * Description  : Marks active user_tiers rows as 'expired' when their expires_at
 *                has passed. Runs every minute to support short-duration plans
 *                (minute- and hour-level plans in addition to day/month/year).
 *
 *                For each expired batch it:
 *                  1. Bulk-updates matching rows to status = 'expired'.
 *                  2. Sends an in-app UserNotification to each affected user.
 *
 *                Safety:
 *                  - Only touches rows with expires_at IS NOT NULL so
 *                    manually-granted unlimited tiers (expires_at = NULL) are
 *                    never touched.
 *                  - Bulk update happens before notifications so a restart
 *                    mid-run never re-expires already-expired rows.
 *
 * Schedule     : Every minute ("* * * * *"). Registered by cron/client.cron.js.
 *
 * Author: Kenneth Obsequio (@lash0000)
 * Date Created: Jun. 29, 2026
 ***********************************************************************************************************************************************************************/
'use strict';

const { Op }              = require('sequelize');
const mdl_UserTiers       = require('../../models/tiers/user_tiers.mdl');
const mdl_TierPlans       = require('../../models/tiers/tier_plans.mdl');
const UserNotification    = require('../../models/notifications/user_notification.mdl');
const CronNotificationSetting = require('../../models/notifications/cron_notification_setting.mdl');
const { NOTIFICATION_REGISTRY } = require('../../data/notifications.data');

require('../../models/tiers/tier.associations');

async function run() {
    // ── 1. Find all active tiers whose expires_at has passed ──────────────────
    let expired;
    try {
        expired = await mdl_UserTiers.findAll({
            where: {
                status:     'active',
                expires_at: { [Op.ne]: null, [Op.lte]: new Date() },
            },
            include: [{
                model:      mdl_TierPlans,
                as:         'plan',
                attributes: ['plan_id', 'label', 'tier'],
                required:   false,
            }],
            attributes: ['tier_id', 'user_id', 'tier'],
        });
    } catch (err) {
        console.error('[CRON][EXPIRE TIERS] Failed to query user_tiers:', err);
        return;
    }

    if (!expired.length) return;

    const tierIds = expired.map((t) => t.tier_id);

    // ── 2. Bulk-update to expired ──────────────────────────────────────────────
    try {
        await mdl_UserTiers.update(
            { status: 'expired' },
            { where: { tier_id: tierIds } }
        );
    } catch (err) {
        console.error('[CRON][EXPIRE TIERS] Bulk update failed:', err);
        return;
    }

    // ── 3. Send in-app notifications (one per affected user) ──────────────────
    // Status flip above always happens — only this step is skippable via settings.
    const settings = await CronNotificationSetting.findOne({ where: { job_name: 'expireUserTiers' } });
    if (!settings || settings.enabled) {
        const notifications = expired.map((t) =>
            NOTIFICATION_REGISTRY.tier_expired.build({
                tier:   t.tier,
                label:  t.plan?.label ?? null,
                planId: t.plan?.plan_id ?? null,
            })
        ).map((payload, i) => ({
            user_id: expired[i].user_id,
            ...payload,
        }));

        try {
            await UserNotification.bulkCreate(notifications, { ignoreDuplicates: true });
        } catch (err) {
            console.error('[CRON][EXPIRE TIERS] Notification bulkCreate failed:', err);
        }
    }

    console.log(`[CRON][EXPIRE TIERS] Expired ${expired.length} tier(s) for ${new Set(expired.map((t) => t.user_id)).size} user(s).`);
}

module.exports = {
    name:     'expireUserTiers',
    schedule: '* * * * *',
    run,
};