<?php

namespace WPZaraz\Telemetry;

if (!defined('ABSPATH')) {
    exit;
}

use WPZaraz\Admin\ReviewPrompt;
use WPZaraz\Support\Options;
use WPZaraz\Tracking\WooCommerceTracker;

/**
 * Counts paid checkout orders from the last 30 days that the visitor's browser never reported
 * to Zaraz (ad blocker, closed tab, no return to the thank-you page). These are the orders
 * the Pro server fallback sends. Only orders placed since the plugin was first used count,
 * and the last hour is left out while browsers may still report.
 */
class MissedOrders {

    private const CACHE_KEY = 'wp_zbridge_missed_orders';

    public static function count(): int {
        $firstSeen = (int) Options::get(ReviewPrompt::FIRST_SEEN, 0);
        if ($firstSeen <= 0 || !function_exists('wc_get_orders')) {
            return 0;
        }
        $cached = get_transient(self::CACHE_KEY);
        if ($cached !== false) {
            return (int) $cached;
        }

        $from = max($firstSeen, time() - 30 * DAY_IN_SECONDS);
        $to = time() - HOUR_IN_SECONDS;
        $count = 0;
        if ($from < $to) {
            $result = wc_get_orders([
                'status'       => function_exists('wc_get_is_paid_statuses') ? wc_get_is_paid_statuses() : ['processing', 'completed'],
                'created_via'  => ['checkout', 'store-api'],
                'date_created' => $from . '...' . $to,
                'meta_query'   => [[ // phpcs:ignore WordPress.DB.SlowDBQuery.slow_db_query_meta_query -- Cached for an hour, admin dashboard only
                    'key'     => WooCommerceTracker::META_CLIENT_CONFIRMED,
                    'compare' => 'NOT EXISTS',
                ]],
                'limit'        => 1,
                'paginate'     => true,
                'return'       => 'ids',
            ]);
            $count = (int) ($result->total ?? 0);
        }
        set_transient(self::CACHE_KEY, $count, HOUR_IN_SECONDS);
        return $count;
    }
}