<?php
/**
 * Runs when KiraBackup is deleted from the Plugins screen.
 *
 * Always removes the plugin's bookkeeping (running job, locks, previews, settings) and the
 * work of restores that did not finish (extracted packages and imported tables). Backups
 * and the restore point are removed only when the site owner opted in on the Settings
 * tab — by default they are kept.
 *
 * A restore that is waiting for confirmation keeps its recovery watcher (a must-use
 * plugin that works on its own), so it can still be rolled back — or is confirmed
 * automatically after 7 days — unless the owner chose to delete everything.
 *
 * @package KiraBackup
 * @license GPL-2.0-or-later
 */

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

require_once __DIR__ . '/includes/class-wpcbr-recovery-gate.php';
require_once __DIR__ . '/includes/class-wpcbr-recovery-inventory.php';
require_once __DIR__ . '/includes/class-wpcbr-recovery.php';

/**
 * Delete only the files KiraBackup creates inside $dir (backups, their parts, work
 * folders, protection files), then the folder itself if nothing else is left. A folder
 * set with WPCBR_BACKUP_DIR may be shared with other files, so it is never wiped blindly.
 */
function wpcbr_uninstall_clean_dir(string $dir, array $patterns, string $purpose = 'out:uninstall'): void {
	if (! is_dir($dir)) {
		return;
	}
	foreach ($patterns as $pattern) {
		foreach ((array) glob(trailingslashit($dir) . $pattern) as $path) {
			if (is_dir($path)) {
				WPCBR_Recovery_Gate::remove_tree($path, 0.0, $purpose); // Never follows links or junctions.
			} else {
				WPCBR_Recovery_Gate::remove_file($path, $purpose);
			}
		}
	}
	$left = array_diff((array) scandir($dir), array('.', '..'));
	if (empty($left)) {
		WPCBR_Recovery_Gate::remove_empty_dir($dir, $purpose . '_empty'); // The gate lets an imports folder go only empty (L3).
	}
}

global $wpdb;

$wpcbr_delete_data = (bool) get_option('wpcbr_delete_on_uninstall', false);

delete_option('wpcbr_kb_job');
// A job in the old option is Complete Backup Restore 1.1's when it names no site: 1.1 may be the active plugin now and
// go on with it (Codex 17回目). One this plugin wrote there before 17回目 names its site.
$wpcbr_old_job = get_option('wpcbr_active_job');
if (is_array($wpcbr_old_job) && isset($wpcbr_old_job['site_prefix'])) {
	delete_option('wpcbr_active_job');
}
delete_option('wpcbr_delete_on_uninstall');
WPCBR_Recovery_Gate::delete_rows($wpdb->options, array(), array('wpcbr_tick_lock_', '_transient_wpcbr_', '_transient_timeout_wpcbr_'), 'out:uninstall_bookkeeping');

// docs/recovery-design-v3.md 7章 G: how the restore record reads decides everything below.
//  - unreadable: nothing of a restore is deleted (kept copies, inventory, wpcbrb_ tables, the
//    database's record, the watcher) — a person decides (HOW-TO-RECOVER.txt);
//  - preparing: dropped with its work (it holds an extracted copy of the database);
//  - committing: settled (put back, or finished);
//  - committed: kept (the watcher goes on; "Everything is fine" or 7 days) — with "delete
//    everything" it is the person's "Everything is fine" (checked first; the watcher
//    finishes the deleting through WP-Cron);
//  - any later state: kept, the watcher goes on;
//  - no record, but this site's database copy of an earlier restore (D3): kept with its
//    record and the watcher (a person decides on the KiraBackup screen);
//  - a 1.1 roll-back under way (wpcbr-tmp/legacy-undo.json): kept.
$wpcbr_state = WPCBR_Recovery::read_state();
if ('valid' === $wpcbr_state['read']) {
	WPCBR_Recovery::settle(null, true);
	$wpcbr_journal = WPCBR_Recovery::read();
	if (null !== $wpcbr_journal && 'preparing' === $wpcbr_journal['state']) {
		WPCBR_Recovery::abandon();
		$wpcbr_journal = WPCBR_Recovery::read();
	}
	if (null !== $wpcbr_journal && in_array($wpcbr_journal['state'], array('committed', 'requested_keep'), true) && $wpcbr_delete_data) {
		WPCBR_Recovery::confirm(10, 'uninstall');
	}
}
$wpcbr_pending = WPCBR_Recovery::exists() || null !== WPCBR_Recovery::orphan_record() || WPCBR_Recovery::legacy_pending();
if (! $wpcbr_pending) {
	WPCBR_Recovery::remove_watcher();
	// What versions before 1.2 left in wpcbr-tmp, then the empty work folders only: a set-aside
	// copy (journal.foreign.json) and the leftover-… folders are a person's to delete (Codex 4・7章 E).
	wpcbr_uninstall_clean_dir(WPCBR_Recovery::root(), array('wpcbr-restore-*', 'trash-*'), '9c:uninstall');
	WPCBR_Recovery::remove_empty_base();
}

// Imported tables that never went live (行9c: the ones this site's record names — never by
// the shape of a name, QA 2026-10-09 N1). The tables of a 1.1
// restore point only when everything is to be deleted (行16) — never another site's in the
// same database, never the kept tables of a record of this version.
require_once __DIR__ . '/includes/class-wpcbr-migration-helper.php';
require_once __DIR__ . '/includes/class-wpcbr-backup-service.php';
require_once __DIR__ . '/includes/class-wpcbr-restore-service.php';
$wpcbr_restore = new WPCBR_Restore_Service();
if (! $wpcbr_pending) {
	$wpcbr_restore->cleanup_orphan_tables(); // While a record is there, its tables are decided by it.
}
$wpcbr_legacy_gone = false;
if (! $wpcbr_pending && $wpcbr_delete_data) {
	$wpcbr_legacy_gone = $wpcbr_restore->drop_own_point_tables();
}

if (! $wpcbr_delete_data) {
	return;
}

// Backups, upload staging. What the owner put into the imports folder (a ZIP by FTP, whatever
// its name) is never deleted: only KiraBackup's own staged copies, upload parts and protection
// files go; the folder stays while anything else is in it (QA 2026-10-09 L3).
$wpcbr_backup_dir = defined('WPCBR_BACKUP_DIR') && '' !== (string) WPCBR_BACKUP_DIR
	? untrailingslashit((string) WPCBR_BACKUP_DIR)
	: WPCBR_Recovery_Gate::wp_dir('content') . '/' . (string) get_option('wpcbr_backup_dir_name', 'wpcbr-backups');
$wpcbr_own_files  = array('wpcbr-backup-*', 'tmp-*', 'index.php', '.htaccess', 'web.config');
$wpcbr_staged     = array('staged-????????????????.zip', 'staged-????????????????.ref', 'parts-*', 'index.php', 'web.config', '.htaccess');
if (WPCBR_Backup_Service::shared_backup_dir()) {
	// A folder set with WPCBR_BACKUP_DIR may be shared with other sites: their backups, running
	// work and staged restores have the same shapes of names. Only what this site's record names
	// goes (QA 2026-10-09 N1); its backups stay in that folder (the settings tab says so).
	( new WPCBR_Backup_Service() )->cleanup_unfinished();
} else {
	wpcbr_uninstall_clean_dir($wpcbr_backup_dir . '/imports', $wpcbr_staged);
	wpcbr_uninstall_clean_dir($wpcbr_backup_dir, $wpcbr_own_files);
}
// The 1.1 folders in this site's wp-content — unless the shared folder is one of them (Codex 9回目).
$wpcbr_shared_real = WPCBR_Backup_Service::shared_backup_dir() ? realpath($wpcbr_backup_dir) : false;
foreach (array('/wpcbr-backups' => $wpcbr_own_files, '/wpcbr-imports' => $wpcbr_staged) as $wpcbr_legacy => $wpcbr_patterns) {
	$wpcbr_legacy_real = realpath(WPCBR_Recovery_Gate::wp_dir('content') . $wpcbr_legacy);
	if (false !== $wpcbr_legacy_real && false !== $wpcbr_shared_real && 0 === strpos(wp_normalize_path($wpcbr_shared_real) . '/', wp_normalize_path($wpcbr_legacy_real) . '/')) {
		continue;
	}
	wpcbr_uninstall_clean_dir(WPCBR_Recovery_Gate::wp_dir('content') . $wpcbr_legacy, $wpcbr_patterns);
}

// The database's record only when it is of version 1.1 and its tables are gone (a record of
// this version stays with its tables — D3).
// It is under 1.1's name (this plugin's own, 18回目〜, is wpcbr_kb_point).
if (! $wpcbr_pending && $wpcbr_legacy_gone && ! WPCBR_Recovery::is_v3_record(WPCBR_Recovery::db_record()) && null !== WPCBR_Recovery::legacy_record()) {
	WPCBR_Recovery_Gate::write_legacy_record(null, '16:uninstall');
}
delete_option('wpcbr_backup_dir_name');