<?php
/**
 * Uninstall AIOHM Knowledge Assistant
 *
 * This file is executed when the plugin is deleted via the WordPress admin.
 * It only removes plugin data if the user has opted to delete data on uninstall.
 */

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

// If uninstall not called from WordPress, exit
if ( ! defined( 'WP_UNINSTALL_PLUGIN' ) ) {
	exit;
}

// Security check
if ( ! current_user_can( 'activate_plugins' ) ) {
	exit;
}

// Check if user wants to delete data on uninstall
$settings    = get_option( 'aiohm_kb_settings', array() );
$delete_data = isset( $settings['delete_data_on_uninstall'] ) && $settings['delete_data_on_uninstall'];

// If user doesn't want to delete data, just exit
if ( ! $delete_data ) {
	exit;
}

// Remove plugin options
delete_option( 'aiohm_kb_settings' );
delete_option( 'aiohm_kb_version' );

// Remove plugin database tables
global $wpdb;

$tables_to_drop = array(
	$wpdb->prefix . 'aiohm_vector_entries',
	$wpdb->prefix . 'aiohm_conversations',
	$wpdb->prefix . 'aiohm_messages',
	$wpdb->prefix . 'aiohm_projects',
	$wpdb->prefix . 'aiohm_project_notes',
	$wpdb->prefix . 'aiohm_usage_tracking',
);

foreach ( $tables_to_drop as $table ) {
    // phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery,WordPress.DB.DirectDatabaseQuery.NoCaching,WordPress.DB.DirectDatabaseQuery.SchemaChange,WordPress.DB.PreparedSQL.InterpolatedNotPrepared -- Direct query necessary for table dropping during uninstall, table names are predefined
	$wpdb->query( "DROP TABLE IF EXISTS `$table`" );
}

// Remove scheduled hooks
wp_clear_scheduled_hook( 'aiohm_scheduled_scan' );

// Remove user meta data
delete_metadata( 'user', 0, 'aiohm_user_settings', '', true );
delete_metadata( 'user', 0, 'aiohm_brand_soul_answers', '', true );

// Remove post meta data
delete_metadata( 'post', 0, '_aiohm_indexed', '', true );

// Remove uploaded files
$upload_dir       = wp_upload_dir();
$aiohm_upload_dir = $upload_dir['basedir'] . '/aiohm_project_files';

if ( is_dir( $aiohm_upload_dir ) ) {
	/**
	 * Recursively delete directory and all its contents
	 *
	 * @param string $dir Directory path to delete
	 * @return bool True on success, false on failure
	 */
	function aiohm_delete_directory( $dir ) {
		if ( ! is_dir( $dir ) ) {
			return false;
		}

		$files = array_diff( scandir( $dir ), array( '.', '..' ) );
		foreach ( $files as $file ) {
			$path = $dir . DIRECTORY_SEPARATOR . $file;
			is_dir( $path ) ? aiohm_delete_directory( $path ) : wp_delete_file( $path );
		}
		global $wp_filesystem;
		if ( empty( $wp_filesystem ) ) {
			require_once ABSPATH . '/wp-admin/includes/file.php';
			WP_Filesystem();
		}
		return $wp_filesystem->rmdir( $dir );
	}

	aiohm_delete_directory( $aiohm_upload_dir );
}

// Clear any cached data
wp_cache_flush();