<?php

/**
 * Salvataggio preferenze di layout per utente (usato da ui_layout.js).
 *   POST action=save  page=...  layout={json}
 *   POST action=reset page=...
 */
ob_start();
include('include/headscript.php');
require_once __DIR__ . '/class/UiPrefs.php';

while (ob_get_level()) ob_end_clean();
header('Content-Type: application/json; charset=utf-8');

$uid = (int)($iduserlogin ?? 0);
if ($uid <= 0 || $_SERVER['REQUEST_METHOD'] !== 'POST') {
    echo json_encode(['ok' => false, 'message' => 'Sessione non valida']);
    exit;
}

$db = DBHandlerSelect::getInstance();
$pdo = $db->getConnection();
$pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

$page = (string)($_POST['page'] ?? '');
$action = (string)($_POST['action'] ?? '');

try {
    if (!UiPrefs::validPage($page)) throw new Exception('Pagina non valida');
    if ($action === 'save') {
        $raw = (string)($_POST['layout'] ?? '');
        if (strlen($raw) > 8000) throw new Exception('Layout troppo grande');
        $layout = json_decode($raw, true);
        if (!is_array($layout)) throw new Exception('Layout non valido');
        UiPrefs::save($pdo, $uid, $page, $layout);
        echo json_encode(['ok' => true]);
    } elseif ($action === 'reset') {
        UiPrefs::reset($pdo, $uid, $page);
        echo json_encode(['ok' => true]);
    } else {
        throw new Exception('Azione non valida');
    }
} catch (Throwable $e) {
    echo json_encode(['ok' => false, 'message' => $e->getMessage()]);
}