<?php
defined('ABSPATH') || exit();
final class APEARI_Sites
{
    public static function ids(?int $network = null): Generator
    {
        if (!is_multisite()) {
            yield get_current_blog_id();
            return;
        }
        $offset = 0;
        do {
            $ids = get_sites([
                'fields' => 'ids',
                'number' => 100,
                'offset' => $offset,
                'orderby' => 'id',
                'order' => 'ASC',
                'network_id' => $network ?? 0,
            ]);
            foreach ($ids as $id) {
                yield (int) $id;
            }
            $offset += count($ids);
        } while (count($ids) === 100);
    }
    public static function run(int $site, callable $callback)
    {
        $switch = get_current_blog_id() !== $site;
        if ($switch) {
            switch_to_blog($site);
        }
        try {
            return $callback();
        } finally {
            if ($switch) {
                restore_current_blog();
            }
        }
    }
    public static function schedule(): void
    {
        if (!wp_next_scheduled('apeari_cleanup')) {
            wp_schedule_event(time() + HOUR_IN_SECONDS, 'daily', 'apeari_cleanup');
        }
    }
    public static function activate(bool $network = false): void
    {
        $sites = $network && is_multisite() ? self::ids(get_current_network_id()) : [get_current_blog_id()];
        foreach ($sites as $site) {
            self::run($site, static function () {
                APEARI_Settings::migrate();
                self::schedule();
                update_option('apeari_privacy_version', APEARI_VERSION, false);
            });
        }
        if ($network && is_multisite()) {
            update_network_option(null, 'apeari_privacy_version', APEARI_VERSION);
        }
    }
    public static function deactivate(bool $network = false): void
    {
        foreach (
            $network && is_multisite() ? self::ids(get_current_network_id()) : [get_current_blog_id()]
            as $site
        ) {
            self::run($site, static fn() => wp_clear_scheduled_hook('apeari_cleanup'));
        }
    }
    public static function boot(): void
    {
        add_action('init', [__CLASS__, 'schedule']);
        add_action('admin_init', static function () {
            if (!current_user_can('manage_options')) {
                return;
            }
            $network =
                is_multisite() && isset(get_site_option('active_sitewide_plugins', [])['apeari/apeari.php']);
            $version = $network
                ? get_network_option(null, 'apeari_privacy_version')
                : get_option('apeari_privacy_version');
            if ($version !== APEARI_VERSION) {
                self::activate($network);
            }
        });
        add_action(
            'wp_initialize_site',
            static function ($site) {
                if (
                    isset(
                        get_network_option((int) $site->network_id, 'active_sitewide_plugins', [])[
                            'apeari/apeari.php'
                        ],
                    )
                ) {
                    self::run((int) $site->blog_id, static function () {
                        APEARI_Settings::migrate();
                        self::schedule();
                    });
                }
            },
            200,
        );
    }
}