<?php
// SPDX-License-Identifier: GPL-3.0-or-later
/**
 * Runs when the plugin is DELETED from the Plugins screen (not on deactivation).
 *
 * Default: no data is removed, so reinstalling restores everything. Only a site whose administrator turned on "permanently delete all
 * Aiwend data when the plugin is deleted" (Aiwend > Settings > Privacy) is cleaned: its Aiwend tables, aiwend_* options and
 * transients and capabilities. The scheduled job hook (aiwend_run_jobs) is removed on every site either way: retained data does not mean
 * a retained cron event, and reinstalling schedules a new one. Posts, pages, media, users, WooCommerce data and everything Aiwend does not own are
 * never touched. The encryption key file is removed only when no site on this installation still keeps Aiwend data.
 */

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

require_once __DIR__ . '/vendor/autoload.php';

(static function (): void {
    global $wpdb;
    // Returns true only when this site's data was removed completely. A step that fails does not stop the others (the options, capabilities and
    // scheduled hook are still cleaned), but then the administrator's flag stays on, so deleting the plugin again retries, and the key file is kept.
    $clean = static function () use ($wpdb): bool {
        // The recurring job event is scheduling, not user data: it goes whether or not the site keeps its data (a kept event would only
        // be dropped by WordPress at its next run, with a log line, because the plugin that registers its schedule is gone).
        $cronCleared = true;
        try {
            wp_clear_scheduled_hook('aiwend_run_jobs');
        } catch (\Throwable $e) {
            $cronCleared = false;
        }
        $flag = get_option(\Aiwend\Lifecycle\Uninstaller::OPTION, false);
        if (!in_array($flag, [true, '1', 1], true)) {
            return false;
        }
        $uninstaller = new \Aiwend\Lifecycle\Uninstaller(new \Aiwend\Db\WpdbConnection($wpdb), $wpdb->prefix, $wpdb->options);
        $ok = $cronCleared;
        $steps = [
            static function () use ($uninstaller): void {
                $uninstaller->dropTables();
            },
            static function () use ($uninstaller): void {
                $uninstaller->deleteOptions(true);
            },
            static function (): void {
                // Content Studio (Stage E1): pending proposals, failed briefs and the idempotency marker on saved drafts. The drafts themselves are ordinary posts and stay.
                \Aiwend\WordPress\ContentStudioRetention::uninstall(get_current_blog_id()); // metadata only: no post is deleted
                \Aiwend\WordPress\WooCommerceAiRetention::uninstall(get_current_blog_id()); // WooCommerce AI (Stage E2): pending proposals only; no product is touched
            },
            static function (): void {
                foreach (\Aiwend\Policy\Capabilities::all() as $cap) {
                    foreach (wp_roles()->role_objects as $role) {
                        $role->remove_cap($cap);
                    }
                }
            },
        ];
        foreach ($steps as $step) {
            try {
                $step();
            } catch (\Throwable $e) {
                $ok = false;
                // phpcs:ignore WordPress.PHP.DevelopmentFunctions.error_log_error_log -- one plain, non-secret line when an uninstall step fails
                error_log('Aiwend uninstall: a cleanup step failed (' . get_class($e) . '). Some data may remain; delete the plugin again to retry.');
            }
        }
        try {
            if ($ok && !$uninstaller->hasData()) {
                $uninstaller->deleteFlag();
            } else {
                $ok = false;
            }
        } catch (\Throwable $e) {
            $ok = false;
        }
        wp_cache_flush();
        return $ok;
    };

    $keepsData = false;
    if (is_multisite()) {
        foreach (get_sites(['fields' => 'ids', 'number' => 0]) as $siteId) {
            switch_to_blog((int) $siteId);
            if (!$clean()) {
                $keepsData = true; // this site chose to keep its data (or never had any): the key file may still be needed
            }
            restore_current_blog();
        }
    } else {
        $keepsData = !$clean();
    }
    if (!$keepsData) {
        \Aiwend\Secrets\KeyFile::forLocation(\Aiwend\Secrets\KeyLocation::forWordPress())->delete();
    }
})();