<?php
/**
 * Entfernt alles, was das Plugin angelegt hat: Optionen, Tabellen, Zeitplaene,
 * bei Multisite auf jeder Site. Mails in der Warteschlange gehen dabei verloren.
 */
defined('WP_UNINSTALL_PLUGIN') || exit;

$sendmails_entfernen = static function (): void {
    global $wpdb;
    foreach (['sendmails_einstellungen', 'sendmails_abgleich_stand', 'sendmails_db_version', 'sendmails_cache_gen', 'sendmails_domains_bekannt', 'sendmails_ws_sperre', 'sendmails_smtp_hosts', 'sendmails_bremse', 'sendmails_warnungen', 'sendmails_wochenbericht', 'sendmails_autoantwort_geprueft'] as $option) {
        delete_option($option);
    }
    $wpdb->query($wpdb->prepare(
        "DELETE FROM {$wpdb->options} WHERE option_name LIKE %s OR option_name LIKE %s",
        $wpdb->esc_like('_transient_sendmails_') . '%',
        $wpdb->esc_like('_transient_timeout_sendmails_') . '%'
    ));
    foreach (['sendmails_warteschlange', 'sendmails_ereignisse', 'sendmails_protokoll'] as $tabelle) {
        $wpdb->query($wpdb->prepare('DROP TABLE IF EXISTS %i', $wpdb->prefix . $tabelle));
    }
    wp_clear_scheduled_hook('sendmails_warteschlange');
    wp_clear_scheduled_hook('sendmails_abgleich');
    wp_clear_scheduled_hook('sendmails_waechter_jetzt');
};

// Ausgeblendete Hinweise je Benutzer (netzwerkweit gespeichert)
delete_metadata('user', 0, 'sendmails_hinweis_aus', '', true);

if (is_multisite()) {
    foreach (get_sites(['fields' => 'ids', 'number' => 0]) as $sendmails_site) {
        switch_to_blog((int) $sendmails_site);
        $sendmails_entfernen();
        restore_current_blog();
    }
} else {
    $sendmails_entfernen();
}