<?php

// phpcs:disable PSR1.Files.SideEffects.FoundWithSymbols

use dokuwiki\plugin\luxtools\PageLink;

require_once(__DIR__ . '/autoload.php');

if (!defined('DOKU_INC')) define('DOKU_INC', __DIR__ . '/../../../');
require_once(DOKU_INC . 'inc/init.php');

global $INPUT;

$syntax = plugin_load('syntax', 'luxtools');
if (!$syntax) {
    http_status(500);
    header('Content-Type: application/json');
    echo json_encode(['ok' => false, 'error' => 'plugin disabled']);
    exit;
}

/**
 * Send a JSON response.
 *
 * @param int $status
 * @param array $payload
 * @return void
 */
function luxtools_pagelink_json(int $status, array $payload): void
{
    http_status($status);
    header('Content-Type: application/json; charset=utf-8');
    header('Cache-Control: no-store, no-cache, must-revalidate');
    header('Pragma: no-cache');
    echo json_encode($payload);
    exit;
}

$cmd = (string)$INPUT->str('cmd');
$pageId = (string)$INPUT->str('id');
if (function_exists('cleanID')) {
    $pageId = (string)cleanID($pageId);
}

if ($cmd === '' || $pageId === '') {
    luxtools_pagelink_json(400, ['ok' => false, 'error' => 'missing parameters']);
}

if (!function_exists('auth_quickaclcheck') || !defined('AUTH_EDIT')) {
    luxtools_pagelink_json(403, ['ok' => false, 'error' => 'forbidden']);
}

if (auth_quickaclcheck($pageId) < AUTH_EDIT) {
    luxtools_pagelink_json(403, ['ok' => false, 'error' => 'forbidden']);
}

if ($cmd === 'info') {
    $depth = (int)$syntax->getConf('pagelink_search_depth');
    if ($depth < 0) $depth = 0;

    $pageLink = new PageLink((string)$syntax->getConf('paths'), $depth);
    $uuid = $pageLink->getPageUuid($pageId);
    if ($uuid === null) {
        luxtools_pagelink_json(200, [
            'ok' => true,
            'uuid' => null,
            'linked' => false,
            'folder' => null,
            'multiple' => false,
        ]);
    }

    $info = $pageLink->resolveUuid($uuid);
    $folder = $info['folder'] ?? null;
    $multiple = !empty($info['multiple']);

    luxtools_pagelink_json(200, [
        'ok' => true,
        'uuid' => $uuid,
        'linked' => is_string($folder) && $folder !== '',
        'folder' => is_string($folder) ? $folder : null,
        'multiple' => $multiple,
    ]);
}

if ($cmd === 'ensure') {
    if (strtoupper($_SERVER['REQUEST_METHOD'] ?? '') !== 'POST') {
        luxtools_pagelink_json(405, ['ok' => false, 'error' => 'method not allowed']);
    }

    if (!checkSecurityToken()) {
        luxtools_pagelink_json(403, ['ok' => false, 'error' => 'bad token']);
    }

    $depth = (int)$syntax->getConf('pagelink_search_depth');
    if ($depth < 0) $depth = 0;

    $pageLink = new PageLink((string)$syntax->getConf('paths'), $depth);
    $uuid = $pageLink->getPageUuid($pageId);

    if ($uuid !== null) {
        luxtools_pagelink_json(200, ['ok' => true, 'uuid' => $uuid, 'created' => false]);
    }

    $uuid = PageLink::createUuidV4();
    $ok = $pageLink->setPageUuid($pageId, $uuid);

    if (!$ok) {
        luxtools_pagelink_json(500, ['ok' => false, 'error' => 'save failed']);
    }

    luxtools_pagelink_json(200, ['ok' => true, 'uuid' => $uuid, 'created' => true]);
}

if ($cmd === 'unlink') {
    if (strtoupper($_SERVER['REQUEST_METHOD'] ?? '') !== 'POST') {
        luxtools_pagelink_json(405, ['ok' => false, 'error' => 'method not allowed']);
    }

    if (!checkSecurityToken()) {
        luxtools_pagelink_json(403, ['ok' => false, 'error' => 'bad token']);
    }

    $depth = (int)$syntax->getConf('pagelink_search_depth');
    if ($depth < 0) $depth = 0;

    $pageLink = new PageLink((string)$syntax->getConf('paths'), $depth);
    $result = $pageLink->unlinkPage($pageId);

    luxtools_pagelink_json(200, [
        'ok' => true,
        'uuid' => $result['uuid'] ?? null,
        'folder' => $result['folder'] ?? null,
    ]);
}

luxtools_pagelink_json(400, ['ok' => false, 'error' => 'unknown command']);