<?php

/**
 * @package Dotclear
 * @subpackage Backend
 *
 * @copyright Olivier Meunier & Association Dotclear
 * @copyright AGPL-3.0
 */
declare(strict_types=1);

namespace Dotclear\Core\Backend;

use ArrayObject;
use Autoloader;
use Dotclear\App;
use Dotclear\Helper\Container\Container;
use Dotclear\Helper\File\Files;
use Dotclear\Helper\File\Path;
use Dotclear\Helper\Html\Form\Btn;
use Dotclear\Helper\Html\Form\Div;
use Dotclear\Helper\Html\Form\Form;
use Dotclear\Helper\Html\Form\Hidden;
use Dotclear\Helper\Html\Form\Img;
use Dotclear\Helper\Html\Form\Input;
use Dotclear\Helper\Html\Form\Label;
use Dotclear\Helper\Html\Form\Li;
use Dotclear\Helper\Html\Form\Link;
use Dotclear\Helper\Html\Form\None;
use Dotclear\Helper\Html\Form\Note;
use Dotclear\Helper\Html\Form\Optgroup;
use Dotclear\Helper\Html\Form\Option;
use Dotclear\Helper\Html\Form\Para;
use Dotclear\Helper\Html\Form\Select;
use Dotclear\Helper\Html\Form\Set;
use Dotclear\Helper\Html\Form\Single;
use Dotclear\Helper\Html\Form\Span;
use Dotclear\Helper\Html\Form\Strong;
use Dotclear\Helper\Html\Form\Submit;
use Dotclear\Helper\Html\Form\Text;
use Dotclear\Helper\Html\Form\Ul;
use Dotclear\Helper\Html\Html;
use Dotclear\Helper\Network\Http;
use Exception;

class Page
{
    /**
     * Stack of loaded JS
     *
     * @var array<string, bool>     $loaded_js
     */
    private static array $loaded_js = [];

    /**
     * Stack of loaded CSS
     *
     * @var array<string, bool>     $loaded_css
     */
    private static array $loaded_css = [];

    /**
     * Stack of preloaded resources (Js, CSS)
     *
     * @var array<string, bool>     $preloaded
     */
    private static array $preloaded = [];

    /**
     * Flag to avoid loading more than once the x-frame-options header
     */
    private static bool $xframe_loaded = false;

    /**
     * Auth check
     *
     * @param      string  $permissions  The permissions
     * @param      bool    $home         Currently on dashboard
     */
    public static function check(string $permissions, bool $home = false): void
    {
        if (App::blog()->isDefined() && App::auth()->check($permissions, App::blog()->id())) {
            return;
        }

        // Check if dashboard is not the current page et if it is granted for the user
        if (!$home && App::blog()->isDefined() && App::auth()->check(App::auth()->makePermissions([
            App::auth()::PERMISSION_USAGE,
            App::auth()::PERMISSION_CONTENT_ADMIN,
        ]), App::blog()->id())) {
            // Go back to the dashboard
            Http::redirect(App::config()->adminUrl());
        }

        if (session_id()) {
            App::session()->destroy();
        }

        // Keep requested URL (in query params)
        $params         = [];
        $request_uri    = isset($_SERVER['REQUEST_URI']) && is_string($request_uri = $_SERVER['REQUEST_URI']) ? $request_uri : '';
        $url_components = parse_url($request_uri);
        if ($url_components !== false && isset($url_components['query'])) {
            $params['go'] = urlencode($url_components['query']);
        }

        // Redirect to authentication
        App::backend()->url()->redirect('admin.auth', $params);
    }

    /**
     * Check super admin
     *
     * @param      bool  $home   The home
     */
    public static function checkSuper(bool $home = false): void
    {
        if (!App::auth()->isSuperAdmin()) {
            // Check if dashboard is not the current page et if it is granted for the user
            if (!$home && App::blog()->isDefined() && App::auth()->check(App::auth()->makePermissions([
                App::auth()::PERMISSION_USAGE,
                App::auth()::PERMISSION_CONTENT_ADMIN,
            ]), App::blog()->id())) {
                // Go back to the dashboard
                Http::redirect(App::config()->adminUrl());
            }

            if (session_id()) {
                App::session()->destroy();
            }

            App::backend()->url()->redirect('admin.auth');
        }
    }

    /**
     * Top of admin page
     *
     * @param      string                   $title       The title
     * @param      string                   $head        The head
     * @param      string                   $breadcrumb  The breadcrumb
     * @param      array<string, string>    $options     The options
     */
    public static function open(string $title = '', string $head = '', string $breadcrumb = '', array $options = []): void
    {
        $maxblogs = 20;
        $js       = [];

        # List of user's blogs
        if (App::auth()->getBlogCount() === 1 || App::auth()->getBlogCount() > $maxblogs) {
            // Only one blog or too many blogs to use a select so use a link to list of blog to change
            $blogmenu = (new Para())
                ->separator(' ')
                ->items([
                    (new Text(null, __('Blog:'))),
                    (new Strong(Html::escapeHTML(App::blog()->name())))->title(Html::escapeHTML(App::blog()->url())),
                    App::auth()->getBlogCount() > $maxblogs ?
                        (new Link())
                            ->href(App::backend()->url()->get('admin.blogs'))
                            ->text(__('Change blog')) :
                        (new None()),
                ]);
        } else {
            $rs_blogs      = App::blogs()->getBlogs(['order' => 'blog_status DESC, LOWER(blog_name) ASC', 'limit' => $maxblogs]);
            $blogs         = [];
            $blogs_sublist = [];
            $last_status   = null;
            while ($rs_blogs->fetch()) {
                $option = (new Option($rs_blogs->strField('blog_name') . ' - ' . $rs_blogs->strField('blog_url'), $rs_blogs->strField('blog_id')));
                if ($last_status !== $rs_blogs->intField('blog_status') && $blogs_sublist !== []) {
                    // New status: add current sub list to main one
                    $blogs[] = (new Optgroup(App::status()->blog()->name($last_status)))
                        ->items($blogs_sublist);
                    // Reset sub list
                    $blogs_sublist = [];
                }

                $blogs_sublist[] = $option;
                $last_status     = $rs_blogs->intField('blog_status');
            }

            if ($blogs_sublist !== []) {
                // Add last sub list to main one
                $blogs[] = (new Optgroup(App::status()->blog()->name($last_status)))
                    ->items($blogs_sublist);
            }

            $request_uri = isset($_SERVER['REQUEST_URI']) && is_string($request_uri = $_SERVER['REQUEST_URI']) ? $request_uri : '';

            $blogmenu = (new Para())
                ->items([
                    (new Select('switchblog'))
                        ->items($blogs)
                        ->default(App::blog()->id())
                        ->label((new Label(__('Blogs:'), Label::IL_TF))->class('classic')),
                    (new Hidden(['redir'], $request_uri)),
                    (new Submit(['blogmenu-ok'], __('ok')))
                        ->class('hidden-if-js'),
                    App::nonce()->formNonce(),
                ]);
        }

        $safe_mode = (App::session()->get('sess_safe_mode') != '');

        # Display

        $headers = new ArrayObject([
            'content-type' => 'Content-Type: text/html; charset=UTF-8', // Content-type
            'referrer'     => 'Referrer-Policy: strict-origin',         // Referrer Policy for admin pages
        ]);

        # Prevents Clickjacking as far as possible
        if (isset($options['x-frame-allow'])) {
            static::setXFrameOptions($headers, $options['x-frame-allow']);
        } else {
            static::setXFrameOptions($headers);
        }

        # Content-Security-Policy (only if safe mode if not active, it may help)
        if (!$safe_mode && App::blog()->settings()->get('system')->getBool('csp_admin_on')) {
            // Get directives from settings if exist, else set defaults

            // SQlite Clearbricks driver does not allow using single quote at beginning or end of a field value
            // so we have to use neutral values (localhost and 127.0.0.1) for some CSP directives
            $csp_prefix = App::db()->con()->syntax() === 'sqlite' ? 'localhost ' : ''; // Hack for SQlite Clearbricks syntax
            $csp_suffix = App::db()->con()->syntax() === 'sqlite' ? ' 127.0.0.1' : ''; // Hack for SQlite Clearbricks syntax

            $csp_admin_default = App::blog()->settings()->get('system')->getStr('csp_admin_default', false);
            $csp_admin_script  = App::blog()->settings()->get('system')->getStr('csp_admin_script', false);
            $csp_admin_style   = App::blog()->settings()->get('system')->getStr('csp_admin_style', false);
            $csp_admin_img     = App::blog()->settings()->get('system')->getStr('csp_admin_img', false);

            $csp = [
                'default-src' => $csp_admin_default ?: $csp_prefix . "'self'" . $csp_suffix,
                'script-src'  => $csp_admin_script ?: $csp_prefix . "'self' 'unsafe-eval'" . $csp_suffix,
                'style-src'   => $csp_admin_style ?: $csp_prefix . "'self' 'unsafe-inline'" . $csp_suffix,
                'img-src'     => $csp_admin_img ?: $csp_prefix . "'self' data: https://dotclear.org blob:",
            ];

            # Cope with blog post preview (via public URL in iframe)
            if (App::blog()->host() !== '') {
                $php_url_host = (string) parse_url(App::blog()->host(), PHP_URL_HOST);
                if ($php_url_host !== '') {
                    $csp['default-src'] .= ' ' . $php_url_host;
                    $csp['script-src']  .= ' ' . $php_url_host;
                    $csp['style-src']   .= ' ' . $php_url_host;
                }
            }

            # Cope with media display in media manager (via public URL)
            if (App::media()->getRootUrl() !== '') {
                $csp['img-src'] .= ' ' . parse_url(App::media()->getRootUrl(), PHP_URL_HOST);
            } elseif (App::blog()->host() !== '') {
                // Let's try with the blog URL
                $csp['img-src'] .= ' ' . parse_url(App::blog()->host(), PHP_URL_HOST);
            }

            # Allow everything in iframe (used by editors to preview public content)
            $csp['frame-src'] = '*';

            // Prepare ArrayObject for behavior
            $csp = new ArrayObject($csp);

            # --BEHAVIOR-- adminPageHTTPHeaderCSP -- ArrayObject<string, string>
            App::behavior()->callBehavior('adminPageHTTPHeaderCSP', $csp);

            // Construct CSP header
            $directives = [];
            foreach ($csp as $key => $value) {
                $directives[] = $key . ' ' . $value;
            }

            if ($directives !== []) {
                $directives[]   = 'report-uri ' . App::config()->adminUrl() . App::backend()->url()->get('admin.csp.report');
                $report_only    = App::blog()->settings()->get('system')->getBool('csp_admin_report_only') ? '-Report-Only' : '';
                $headers['csp'] = 'Content-Security-Policy' . $report_only . ': ' . implode(' ; ', $directives);
            }
        }

        # --BEHAVIOR-- adminPageHTTPHeaders -- ArrayObject<string, string>
        App::behavior()->callBehavior('adminPageHTTPHeaders', $headers);
        foreach ($headers as $value) {
            header($value);
        }

        $data_theme  = App::auth()->prefs()->get('interface')->getStr('theme', false);
        $user_lang   = is_string($user_lang = App::auth()->getInfo('user_lang')) ? $user_lang : 'en';
        $dir_lang    = App::lang()->getLanguageTextDirection($user_lang);
        $request_uri = isset($_SERVER['REQUEST_URI']) && is_string($request_uri = $_SERVER['REQUEST_URI']) ? $request_uri : '';

        echo
        '<!DOCTYPE html>' .
        '<html lang="' . $user_lang . '" dir="' . $dir_lang . '"' . ' data-theme="' . $data_theme . '">' . "\n" .
        "<head>\n" .
        '<meta charset="UTF-8">' . "\n" .
        '<meta name="ROBOTS" content="NOARCHIVE,NOINDEX,NOFOLLOW">' . "\n" .
        '<meta name="GOOGLEBOT" content="NOSNIPPET">' . "\n" .
        '<meta name="viewport" content="width=device-width, initial-scale=1.0">' . "\n" .
        '<title>' . $title . ' - ' . Html::escapeHTML(App::blog()->name()) . ' - ' . Html::escapeHTML(App::config()->vendorName()) . ' - ' . App::config()->dotclearVersion() . '</title>' . "\n";

        echo static::cssLoad('style/default.css');

        if ($rtl = (App::lang()->getLanguageTextDirection(App::lang()->getLang()) === 'rtl')) {
            echo static::cssLoad('style/default-rtl.css');
        }

        if (!App::auth()->prefs()->get('interface')->getBool('hide_std_favicon')) {
            echo
            '<link rel="icon" type="image/png" href="images/favicon.png">' . "\n" .
            '<link rel="icon" type="image/svg+xml" href="images/favicon.svg" />' . "\n" .
            '<link rel="apple-touch-icon" type="image/png" href="images/favicon.png">' . "\n" .
            '<link rel="apple-touch-icon" type="image/svg+xml" href="images/favicon.svg" />' . "\n";
        }

        if (App::auth()->prefs()->get('interface')->get('htmlfontsize')) {
            $js['htmlFontSize'] = App::auth()->prefs()->get('interface')->getStr('htmlfontsize', false);
        }

        if (App::auth()->prefs()->get('interface')->getBool('dynamicletterspacing')) {
            $js['dynamicLetterSpacing'] = true;
        }

        if (App::auth()->prefs()->get('interface')->getBool('systemfont')) {
            $js['systemFont'] = true;
        }

        $js['hideMoreInfo'] = App::auth()->prefs()->get('interface')->getBool('hidemoreinfo', false);

        $js['quickMenuPrefix'] = App::auth()->prefs()->get('interface')->getStr('quickmenuprefix', false) ?: ':';

        $js['servicesUri'] = App::backend()->url()->get('admin.rest');
        $js['servicesOff'] = !App::rest()->serveRestRequests();

        $js['noDragDrop'] = App::auth()->prefs()->get('accessibility')->getBool('nodragdrop', false);

        $js['debug'] = App::config()->debugMode();

        $js['showIp'] = App::blog()->isDefined() && App::auth()->check(App::auth()->makePermissions([
            App::auth()::PERMISSION_CONTENT_ADMIN,
        ]), App::blog()->id());

        // Set some JSON data
        echo Html::jsJson('dotclear_init', $js);

        echo
        static::jsCommon() .
        static::jsToggles() .
        $head;

        # --BEHAVIOR-- adminPageHTMLHead -- bool true = main, false = popup
        App::behavior()->callBehavior('adminPageHTMLHead', true);

        echo
        "</head>\n";

        $prelude = (new Ul())
            ->id('prelude')
            ->items([
                (new Li())
                    ->items([
                        (new Link())->href('#content')->text(__('Go to the content')),
                    ]),
                (new Li())
                    ->items([
                        (new Link())->href('#main-menu')->text(__('Go to the menu')),
                    ]),
                (new Li())
                    ->items([
                        (new Link())->href('#help')->text(__('Go to help')),
                    ]),
            ]);

        echo
        '<body id="dotclear-admin" class="no-js' .
        ($rtl ? ' rtl ' : '') .
        ($safe_mode ? ' safe-mode' : '') .
        (App::config()->debugMode() ? ' debug-mode' : '') .
        '">' . "\n" .
        $prelude->render();

        // Header
        $logout_label = sprintf(__('Logout %s'), App::auth()->userID());

        echo (new Div(null, 'header'))
            ->id('header')
            ->role('banner')
            ->items([
                (new Text('h1', (new Link())
                        ->href(App::backend()->url()->get('admin.home'))
                        ->title(__('My dashboard'))
                        ->items([
                            (new Span(App::config()->vendorName()))->class('hidden'),
                        ])
                    ->render())),
                (App::config()->debugMode()
                    ? (new Btn('debug-btn', 'ⓘ'))
                        ->title('Debug information')
                        ->popovertarget('debug')
                        ->class('debug-anchor')
                    : (new None())),
                (new Form())
                    ->method('post')
                    ->action(App::backend()->url()->get('admin.home'))
                    ->id('top-info-blog')
                    ->fields([
                        $blogmenu,
                        (new Para())
                            ->items([
                                (new Link())
                                    ->href(App::blog()->url())
                                    ->class('outgoing')
                                    ->title(__('Go to site'))
                                    ->items([
                                        (new Text(null, __('Go to site'))),
                                        (new Img('images/outgoing-link.svg'))->alt(''),
                                    ]),
                            ]),
                    ]),
                (new Ul())
                    ->id('top-info-user')
                    ->items([
                        (new Li())
                            ->items([
                                (new Link())
                                    ->class(array_filter([
                                        'smallscreen',
                                        preg_match('/' . preg_quote(App::backend()->url()->get('admin.user.preferences'), '/') . '(\?.*)?$/', $request_uri) ? ' active' : '']))
                                    ->href(App::backend()->url()->get('admin.user.preferences'))
                                    ->text(__('Preferences')),
                            ]),
                        (new Li())
                            ->items([
                                (new Link())
                                    ->class('logout')
                                    ->href(App::backend()->url()->get('admin.logout'))
                                    ->ariaLabel($logout_label)
                                    ->items([
                                        (new Span($logout_label))
                                            ->class('nomobile'),
                                        (new Img('images/logout.svg'))
                                            ->alt(''),
                                    ]),
                            ]),
                    ]),
            ])
        ->render();

        $content_class_extra = App::auth()->prefs()->get('interface')->getBool('hide_collapser_btn') ? ' hide_collapser_btn' : '';

        $expander = (new Div())
            ->class(['hidden-if-no-js', 'collapser-box'])
            ->items([
                (new Btn())
                    ->type('button')
                    ->id('collapser')
                    ->class(['void-btn', $content_class_extra])
                    ->text((new Set())
                            ->items([
                                (new Img('images/hide.svg'))
                                    ->class(['collapse-mm', 'visually-hidden'])
                                    ->alt(__('Hide main menu')),
                                (new Img('images/expand.svg'))
                                    ->class(['expand-mm', 'visually-hidden'])
                                    ->alt(__('Show main menu')),
                            ])
                        ->render()),
            ]);

        $expander_btn = App::auth()->prefs()->get('interface')->getBool('hide_collapser_btn') ?
            (new None()) :
            (new Btn('collapser_btn', __('Hide menu')));

        echo
        '<div id="wrapper" class="clearfix">' . "\n" .
        $expander->render() .
        $expander_btn->render() .
        '<main id="main" role="main">' . "\n" .
        '<div id="content" class="clearfix' . $content_class_extra . '">' . "\n";

        // Display breadcrumb (if given) before any error messages
        echo $breadcrumb;

        // Safe mode
        if ($safe_mode) {
            echo
            (new Div())
                ->class('warning')
                ->role('alert')
                ->items([
                    (new Text('h3', __('Safe mode'))),
                    (new Note())
                        ->text(__('You are in safe mode. All plugins have been temporarily disabled. Remind to log out then log in again normally to get back all functionalities.')),
                ])
            ->render();
        }

        // Display notices and errors
        echo App::backend()->notices()->getNotices();
    }

    /**
     * End of admin page
     */
    public static function close(): void
    {
        if (!App::backend()->resources()->context() && !App::auth()->prefs()->get('interface')->getBool('hidehelpbutton')) {
            echo (new Para())
                ->id('help-button')
                ->items([
                    (new Link())
                        ->href(App::backend()->url()->get('admin.help'))
                        ->title(__('Global help'))
                        ->text(__('Global help')),
                ])
            ->render();
        }

        // Prepare datalist for quick menu access
        $listMenus = App::backend()->listMenus();
        App::lexical()->lexicalSort($listMenus, App::lexical()::ADMIN_LOCALE);
        $prefix   = App::auth()->prefs()->get('interface')->getStr('quickmenuprefix', false) ?: ':';
        $datalist = '<datalist id="menulist">';
        foreach (array_unique($listMenus) as $menuitem) {
            $datalist .= '<option value="' . $prefix . $menuitem . '"></option>';
        }

        $datalist .= '</datalist>';

        $search = (new Form())
            ->method('get')
            ->action(App::backend()->url()->get('admin.search'))
            ->id('search-menu')
            ->role('search')
            ->fields([
                (new Para())
                    ->items([
                        (new Input('qx', 'search'))
                            ->size(30)
                            ->maxlength(255)
                            ->list('menulist')
                            ->label((new Label(__('Search:'), Label::OL_TF))->class('hidden')),
                        (new Hidden(['process'], 'Search')),
                        (new Submit(['search-ok'], __('OK')))
                            ->translate(false),
                    ]),
                (new Text(null, $datalist)),
            ]);

        echo
        "</div>\n" .  // End of #content
        "</main>\n" . // End of #main

        '<nav id="main-menu" role="navigation" aria-label="' . __('Main menu') . '"' . (App::auth()->prefs()->get('interface')->getBool('stickymenu') ? ' class="sticky"' : '') . '>' . "\n";

        echo $search->render();

        foreach (array_keys((array) App::backend()->menus()) as $k) {
            echo App::backend()->menus()[$k]?->draw();
        }

        $text = sprintf(__('Thank you for using %s.'), 'Dotclear ' . App::config()->dotclearVersion() . ' (Codename: ' . App::config()->dotclearName() . ')');

        # --BEHAVIOR-- adminPageFooter --
        $textAlt = App::behavior()->callBehavior('adminPageFooterV2', $text);
        if ($textAlt !== '') {
            $text = $textAlt;
        }

        $text = Html::escapeHTML($text);

        $gototop = (new Para())
            ->id('gototop')
            ->items([
                (new Link())
                    ->href('#wrapper')
                    ->items([
                        (new Img('images/up.svg'))
                            ->class('light-only')
                            ->alt(__('Page top'))
                            ->ariaHidden(true),
                        (new Img('images/up-dark.svg'))
                            ->class('dark-only')
                            ->alt(__('Page top'))
                            ->ariaHidden(true),
                        (new Span(__('Page top')))
                            ->class('visually-hidden'),
                    ]),
            ]);

        echo
        "</nav>\n" . // End of #main-menu
        "</div>\n" . // End of #wrapper
        $gototop->render();

        $figure = <<<'FIGURE'
              _^_
              |@|
             =====
              #::
              #::
              #::
              #::
              #::
              #::
            ###::^-..
                     ^ ~ ~~ ~~ ~ ~ ~
                      \~~ ~~ ~ ~  ~~~~~
            FIGURE;

        $tooltip = (new Span())
            ->class('tooltip')
            ->popover('hint')
            ->items([
                (new Text(null, sprintf(__('Thank you for using %s.'), 'Dotclear ' . App::config()->dotclearVersion()))),
                (new Single('br')),
                (new Text(null, '(Codename: ' . App::config()->dotclearName() . ')')),
                (new Single('br')),
                (new Single('br')),
                (new Text('pre', $figure))
                    ->ariaHidden(true),
            ]);

        $logo = (new Link())
            ->class('tooltip-anchor')
            ->href('https://dotclear.org/')
            ->title($text)
            ->items([
                (new Img('style/dc_logos/dotclear-light.svg'))
                    ->class('light-only')
                    ->alt(__('Dotclear logo')),
                (new Img('style/dc_logos/dotclear-dark.svg'))
                    ->class('dark-only')
                    ->alt(__('Dotclear logo')),
                $tooltip,
            ]);

        echo
        '<footer id="footer" role="contentinfo">' .
        $logo->render() .
        '</footer>' . "\n";

        if (App::config()->devMode()) {
            echo static::debugInfo();
        }

        # --BEHAVIOR-- adminPageHTMLBody -- bool true = main, false = popup
        App::behavior()->callBehavior('adminPageHTMLBody', true);

        echo
        '</body></html>';
    }

    /**
     * The top of a popup.
     *
     * @param      string  $title       The title
     * @param      string  $head        The head
     * @param      string  $breadcrumb  The breadcrumb
     */
    public static function openPopup(string $title = '', string $head = '', string $breadcrumb = ''): void
    {
        $js = [];

        $safe_mode = (App::session()->get('sess_safe_mode') != '');

        # Display
        header('Content-Type: text/html; charset=UTF-8');

        # Referrer Policy for admin pages
        header('Referrer-Policy: strict-origin');

        # Prevents Clickjacking as far as possible
        header('X-Frame-Options: SAMEORIGIN'); // FF 3.6.9+ Chrome 4.1+ IE 8+ Safari 4+ Opera 10.5+

        $data_theme = App::auth()->prefs()->get('interface')->getStr('theme', false);
        $user_lang  = is_string($user_lang = App::auth()->getInfo('user_lang')) ? $user_lang : 'en';
        $dir_lang   = App::lang()->getLanguageTextDirection($user_lang);

        echo
        '<!DOCTYPE html>' .
        '<html lang="' . $user_lang . '" dir="' . $dir_lang . '"' . ' data-theme="' . $data_theme . '">' . "\n" .
        "<head>\n" .
        '<meta charset="UTF-8">' . "\n" .
        '<meta name="viewport" content="width=device-width, initial-scale=1.0">' . "\n" .
        '<title>' . $title . ' - ' . Html::escapeHTML(App::blog()->name()) . ' - ' . Html::escapeHTML(App::config()->vendorName()) . ' - ' . App::config()->dotclearVersion() . '</title>' . "\n" .
        '<meta name="ROBOTS" content="NOARCHIVE,NOINDEX,NOFOLLOW">' . "\n" .
        '<meta name="GOOGLEBOT" content="NOSNIPPET">' . "\n";

        echo static::cssLoad('style/default.css');

        if ($rtl = (App::lang()->getLanguageTextDirection(App::lang()->getLang()) === 'rtl')) {
            echo static::cssLoad('style/default-rtl.css');
        }

        if (App::auth()->prefs()->get('interface')->getStr('htmlfontsize')) {
            $js['htmlFontSize'] = App::auth()->prefs()->get('interface')->getStr('htmlfontsize', false);
        }

        if (App::auth()->prefs()->get('interface')->getBool('dynamicletterspacing')) {
            $js['dynamicLetterSpacing'] = true;
        }

        if (App::auth()->prefs()->get('interface')->getBool('systemfont')) {
            $js['systemFont'] = true;
        }

        $js['hideMoreInfo'] = App::auth()->prefs()->get('interface')->getBool('hidemoreinfo', false);

        $js['quickMenuPrefix'] = App::auth()->prefs()->get('interface')->getStr('quickmenuprefix', false) ?: ':';

        $js['servicesUri'] = App::backend()->url()->get('admin.rest');
        $js['servicesOff'] = !App::rest()->serveRestRequests();

        $js['noDragDrop'] = App::auth()->prefs()->get('accessibility')->getBool('nodragdrop', false);

        $js['debug'] = App::config()->debugMode();

        // Set JSON data
        echo Html::jsJson('dotclear_init', $js);

        echo
        static::jsCommon() .
        static::jsToggles() .
            $head;

        # --BEHAVIOR-- adminPageHTMLHead -- bool true = main, false = popup
        App::behavior()->callBehavior('adminPageHTMLHead', false);

        echo
        "</head>\n" .
        '<body id="dotclear-admin" class="popup' .
        ($rtl ? 'rtl' : '') .
        ($safe_mode ? ' safe-mode' : '') .
        (App::config()->debugMode() ? ' debug-mode' : '') .
        '">' . "\n" .
        '<h1>' . App::config()->vendorName() . '</h1>' . "\n";

        echo
        '<div id="wrapper">' . "\n" .
        '<main id="main" role="main">' . "\n" .
        '<div id="content">' . "\n";

        // display breadcrumb if given
        echo $breadcrumb;

        // Display notices and errors
        echo App::backend()->notices()->getNotices();
    }

    /**
     * The end of a popup.
     */
    public static function closePopup(): void
    {
        $gototop = (new Para())
            ->id('gototop')
            ->items([
                (new Link())
                    ->href('#wrapper')
                    ->items([
                        (new Img('images/up.svg'))
                            ->alt(__('Page top'))
                            ->ariaHidden(true),
                        (new Span(__('Page top')))
                            ->class('visually-hidden'),
                    ]),
            ]);

        echo
        "</div>\n" .  // End of #content
        "</main>\n" . // End of #main
        "</div>\n" .  // End of #wrapper
        $gototop->render() . "\n" .
        '<footer id="footer" role="contentinfo"><p>&nbsp;</p></footer>' . "\n";

        # --BEHAVIOR-- adminPageHTMLBody -- bool true = main, false = popup
        App::behavior()->callBehavior('adminPageHTMLBody', false);

        echo
        '</body></html>';
    }

    /**
     * Opens a module.
     *
     * @param      string       $title  The title
     * @param      null|string  $head   The head
     */
    public static function openModule(string $title = '', ?string $head = ''): void
    {
        if ($title === '') {
            $title = App::config()->vendorName();
        }

        echo '<html><head><title>' . $title . '</title>' . $head . '</head><body>';
    }

    /**
     * Closes a module.
     */
    public static function closeModule(): void
    {
        echo '</body></html>';
    }

    /**
     * Get current notices
     *
     * @deprecated since 2.27, use App::backend()->notices()->getNotices() instead
     */
    public static function notices(): string
    {
        App::deprecated()->set('App::backend()->notices()->getNotices()', '2.27');

        return App::backend()->notices()->getNotices();
    }

    /**
     * Adds a message notice.
     *
     * @deprecated since 2.27, use App::backend()->notices()->addMessageNotice() instead
     *
     * @param      string                   $message  The message
     * @param      array<string, mixed>     $options  The options
     */
    public static function addMessageNotice(string $message, array $options = []): void
    {
        App::deprecated()->set('App::backend()->notices()->addNotices()', '2.27');

        App::backend()->notices()->addNotice(Notices::NOTICE_MESSAGE, $message, $options);
    }

    /**
     * Adds a success notice.
     *
     * @deprecated since 2.27, use App::backend()->notices()->addSuccessNotice() instead
     *
     * @param      string                   $message  The message
     * @param      array<string, mixed>     $options  The options
     */
    public static function addSuccessNotice(string $message, array $options = []): void
    {
        App::deprecated()->set('App::backend()->notices()->addNotices()', '2.27');

        App::backend()->notices()->addNotice(Notices::NOTICE_SUCCESS, $message, $options);
    }

    /**
     * Adds a warning notice.
     *
     * @deprecated since 2.27, use App::backend()->notices()->addWarningNotice() instead
     *
     * @param      string                   $message  The message
     * @param      array<string, mixed>     $options  The options
     */
    public static function addWarningNotice(string $message, array $options = []): void
    {
        App::deprecated()->set('App::backend()->notices()->addNotices()', '2.27');

        App::backend()->notices()->addNotice(Notices::NOTICE_WARNING, $message, $options);
    }

    /**
     * Adds an error notice.
     *
     * @deprecated since 2.27, use App::backend()->notices()->addErrorNotice() instead
     *
     * @param      string                   $message  The message
     * @param      array<string, mixed>     $options  The options
     */
    public static function addErrorNotice(string $message, array $options = []): void
    {
        App::deprecated()->set('App::backend()->notices()->addNotices()', '2.27');

        App::backend()->notices()->addNotice(Notices::NOTICE_ERROR, $message, $options);
    }

    /**
     * Return/display a notice.
     *
     * @deprecated since 2.27, use App::backend()->notices()->message() instead
     *
     * @param      string  $msg        The message
     * @param      bool    $timestamp  Include the timestamp
     * @param      bool    $div        The message container, true for <div>, false for <p>
     * @param      bool    $echo       Immediatly displayed
     * @param      string  $class      The class to use
     *
     * @return     string  The notice
     */
    public static function message(string $msg, bool $timestamp = true, bool $div = false, bool $echo = true, ?string $class = null): string
    {
        App::deprecated()->set('App::backend()->notices()->message()', '2.27');

        return App::backend()->notices()->message($msg, $timestamp, $div, $echo, $class);
    }

    /**
     * Return/display a success notice.
     *
     * @deprecated since 2.27, use App::backend()->notices()->success() instead
     *
     * @param      string  $msg        The message
     * @param      bool    $timestamp  Include the timestamp
     * @param      bool    $div        The message container, true for <div>, false for <p>
     * @param      bool    $echo       Immediatly displayed
     *
     * @return     string  The notice
     */
    public static function success(string $msg, bool $timestamp = true, bool $div = false, bool $echo = true): string
    {
        App::deprecated()->set('App::backend()->notices()->success()', '2.27');

        return App::backend()->notices()->success($msg, $timestamp, $div, $echo);
    }

    /**
     * Return/display a warning notice.
     *
     * @deprecated since 2.27, use App::backend()->notices()->warning() instead
     *
     * @param      string  $msg        The message
     * @param      bool    $timestamp  Include the timestamp
     * @param      bool    $div        The message container, true for <div>, false for <p>
     * @param      bool    $echo       Immediatly displayed
     *
     * @return     string  The notice
     */
    public static function warning(string $msg, bool $timestamp = true, bool $div = false, bool $echo = true): string
    {
        App::deprecated()->set('App::backend()->notices()->warning()', '2.27');

        return App::backend()->notices()->warning($msg, $timestamp, $div, $echo);
    }

    /**
     * Return/display a error notice.
     *
     * @deprecated since 2.27, use App::backend()->notices()->error() instead
     *
     * @param      string  $msg        The message
     * @param      bool    $timestamp  Include the timestamp
     * @param      bool    $div        The message container, true for <div>, false for <p>
     * @param      bool    $echo       Immediatly displayed
     *
     * @return     string  The notice
     */
    public static function error(string $msg, bool $timestamp = true, bool $div = false, bool $echo = true): string
    {
        App::deprecated()->set('App::backend()->notices()->error()', '2.27');

        return App::backend()->notices()->error($msg, $timestamp, $div, $echo);
    }

    /**
     * Get breadcrumb
     *
     * @param      array<int|string, mixed>|null    $elements  The elements
     * @param      array<string, mixed>             $options   The options
     */
    public static function breadcrumb(?array $elements = null, array $options = []): string
    {
        $with_home_link = $options['home_link'] ?? true;
        $hl             = $options['hl']        ?? true;

        $hl_pos = isset($options['hl_pos']) && is_numeric($hl_pos = $options['hl_pos']) ? (int) $hl_pos : -1;

        // First item of array elements should be blog's name, System or Plugins
        $home = $with_home_link ?
        (new Link())
            ->class('go_home')
            ->href(App::backend()->url()->get('admin.home'))
            ->items([
                (new Img('style/dashboard.svg'))
                    ->class(['go_home', 'light-only'])
                    ->alt(__('Go to dashboard')),
                (new Img('style/dashboard-dark.svg'))
                    ->class(['go_home', 'dark-only'])
                    ->alt(__('Go to dashboard')),
            ]) :
        (new Set())
            ->items([
                (new Img('style/dashboard-alt.svg'))
                    ->alt('')
                    ->class(['go_home', 'light-only']),
                (new Img('style/dashboard-alt-dark.svg'))
                    ->alt('')
                    ->class(['go_home', 'dark-only']),
            ])
        ;

        // Next items
        $links = [];
        $index = 0;
        if ($hl_pos < 0) {
            $hl_pos = count((array) $elements) + $hl_pos;
        }

        foreach ((array) $elements as $element => $url) {
            if (is_string($url)) {
                if ($hl && $index === $hl_pos) {
                    $label = (new Span((string) $element))
                        ->class('page-title')
                        ->ariaCurrent('location');
                } else {
                    $label = (new Text(null, (string) $element));
                }

                $links[] = $url !== '' ?
                (new Link())
                    ->href($url)
                    ->items([$label]) :
                (new Set())
                    ->items([$label])
                ;
                $index++;
            }
        }

        // Each items (but home) are separated by > (&rsaquo)
        $next = (new Set())
            ->separator(' &rsaquo; ')
            ->items($links);

        // Home and other items are separated by :
        return (new Div(null, 'h2'))
            ->ariaLabel(__('Breadcrumb'))
            ->separator(' : ')
            ->items([
                $home,
                $next,
            ])
        ->render();
    }

    /**
     * Ensures that Xdebug stack trace is available based on Xdebug version.
     *
     * Idea taken from developer bishopb at https://github.com/rollbar/rollbar-php
     *
     *  xdebug configuration:
     *
     *  zend_extension = /.../xdebug.so
     *
     *  xdebug.auto_trace = On
     *  xdebug.trace_format = 0
     *  xdebug.trace_options = 1
     *  xdebug.show_mem_delta = On
     *  xdebug.profiler_enable = 0
     *  xdebug.profiler_enable_trigger = 1
     *  xdebug.profiler_output_dir = /tmp
     *  xdebug.profiler_append = 0
     *  xdebug.profiler_output_name = timestamp
     */
    private static function isXdebugStackAvailable(): bool
    {
        if (!function_exists('xdebug_get_function_stack')) {
            return false;
        }

        // check for Xdebug being installed to ensure origin of xdebug_get_function_stack()
        $version = phpversion('xdebug');
        if ($version === false) {
            return false;
        }

        // Xdebug 2 and prior
        if (version_compare($version, '3.0.0', '<')) {
            return true;
        }

        // Xdebug 3 and later, proper mode is required
        $xdebug = ini_get('xdebug.mode');

        return $xdebug === false ? false : str_contains($xdebug, 'develop');
    }

    /**
     * Get HTML code of debug information
     */
    protected static function debugInfo(): string
    {
        $items = [];

        $items[] = (new Para())
            ->items([
                (new Text(null, 'Memory: usage = ')),
                (new Strong(Files::size(memory_get_usage()))),
                (new Text(null, ' - peak = ')),
                (new Strong(Files::size(memory_get_peak_usage()))),
            ]);

        if (self::isXdebugStackAvailable()
            && function_exists('xdebug_time_index')
            && function_exists('xdebug_get_profiler_filename')
        ) {
            $items[] = (new Para())
                ->items([
                    (new Text(null, 'Elapsed time = ')),
                    (new Strong((string) \xdebug_time_index())),
                    (new Text(null, ' seconds')),
                ]);

            $prof_file = \xdebug_get_profiler_filename();
            if ($prof_file !== '') {
                $items[] = (new Para())
                    ->items([
                        (new Text(null, 'Profiler file : ' . \xdebug_get_profiler_filename())),
                    ]);
            } else {
                $prof_url = Http::getSelfURI();
                $prof_url .= str_contains($prof_url, '?') ? '&' : '?';
                $prof_url .= 'XDEBUG_PROFILE';

                $items[] = (new Para())
                    ->items([
                        (new Link())
                            ->href(Html::escapeURL($prof_url))
                            ->text('Trigger profiler'),
                    ]);
            }
        } else {
            $start    = App::config()->startTime();
            $end      = microtime(true);
            $duration = (int) (((float) $end - $start) * 1000.0); // in milliseconds

            $items[] = (new Para())
                ->items([
                    (new Text(null, 'Page construction time (without asynchronous/secondary HTTP requests) = ')),
                    (new Strong(sprintf('%d ms', $duration))),
                ]);
        }

        $exclude     = ['_COOKIE', '_ENV', '_FILES', '_GET', '_POST', '_REQUEST', '_SERVER', '_SESSION'];
        $global_vars = array_diff(array_keys($GLOBALS), $exclude);
        sort($global_vars);
        $vars = array_map(fn (int|string $var): string => (new Strong((string) $var))->render(), $global_vars);

        if ($vars !== []) {
            $items[] = (new Para())
                ->items([
                    (new Text(null, 'Global vars (Dotclear only): ' . implode(', ', $vars))),
                ]);
        }

        $items[] = (new Para())
            ->items([
                (new Text(null, 'Autoloader: requests = ')),
                (new Strong((string) Autoloader::me()->getRequestsCount())),
                (new Text(null, ' - loads = ')),
                (new Strong((string) Autoloader::me()->getLoadsCount())),
            ]);

        $items[] = (new Para())
            ->items([
                (new Text(null, 'Factories: requests = ')),
                (new Strong((string) Container::getRequestsCount())),
                (new Text(null, ' - loads = ')),
                (new Strong((string) Container::getLoadsCount())),
            ]);

        return (new Div())
            ->popover('hint')
            ->id('debug')
            ->items([
                (new Div())
                    ->items($items),
            ])
        ->render();
    }

    /**
     * Display Help block
     *
     * @param      mixed  ...$params  The parameters
     */
    public static function helpBlock(...$params): void
    {
        if (App::auth()->prefs()->get('interface')->getBool('hidehelpbutton')) {
            return;
        }

        $args = new ArrayObject($params);

        # --BEHAVIOR-- adminPageHelpBlock -- ArrayObject
        App::behavior()->callBehavior('adminPageHelpBlock', $args);

        $no_content = false;
        $content    = '';

        if ((count($args) === 0) || (App::backend()->resources()->entries('help') === [])) {
            $no_content = true;
        } else {
            $content = '';
            foreach ($args as $arg) {
                if (is_object($arg) && isset($arg->content) && is_string($arg->content)) {
                    $content .= $arg->content;

                    continue;
                }

                if (is_string($arg)) {
                    $file = App::backend()->resources()->entry('help', $arg);
                    if ($file === '') {
                        continue;
                    }

                    if (!file_exists($file)) {
                        continue;
                    }

                    if (!is_readable($file)) {
                        continue;
                    }

                    $file_content = (string) file_get_contents($file);

                    if (preg_match('|<body[^>]*?>(.*?)</body>|ms', $file_content, $matches)) {
                        $content .= $matches[1];
                    } else {
                        $content .= $file_content;
                    }
                }
            }

            // Filter remaining HTML
            $content = App::filter()->HTMLfilter($content, true);

            if (trim($content) === '') {
                $no_content = true;
            }
        }

        // Set contextual help global flag
        App::backend()->resources()->context(true);

        echo (new Div())
            ->id('help')
            ->items([
                (new Single('hr')), // Will be removed by JS script (see common.js)
                $no_content ?
                (new None()) :
                (new Set())
                    ->items([
                        (new Div())
                            ->class(['help-content', 'clear'])
                            ->items([
                                (new Text('h3', __('Help about this page'))),
                                (new Text(null, $content)),
                            ]),
                        (new Single('hr')), // Will be removed by JS script (see common.js)
                    ]),
                (new Div())
                    ->id('helplink')
                    ->items([
                        (new Note())
                            ->text(sprintf(
                                $no_content ? '%s' : __('See also %s'),
                                sprintf(
                                    (new Link())->href(App::backend()->url()->get('admin.help'))->text('%s')->render(),
                                    __('the global help')
                                )
                            )),
                    ]),
            ])
        ->render();
    }

    /**
     * Get HTML code to preload resource
     *
     * @param      string       $src         The source
     * @param      null|string  $version     The version
     * @param      string       $type        The type
     */
    public static function preload(string $src, ?string $version = '', string $type = 'style'): string
    {
        $escaped_src = Html::escapeHTML($src);
        if (!isset(self::$preloaded[$escaped_src])) {
            self::$preloaded[$escaped_src] = true;

            return '<link rel="preload" href="' . static::appendVersion($escaped_src, $version) . '" as="' . $type . '">' . "\n";
        }

        return '';
    }

    /**
     * Get HTML code to load CSS stylesheet
     *
     * @param      string       $src         The source
     * @param      string       $media       The media
     * @param      null|string  $version     The version
     */
    public static function cssLoad(string $src, string $media = 'screen', ?string $version = ''): string
    {
        $escaped_src = Html::escapeHTML($src);
        if (!isset(self::$loaded_css[$escaped_src])) {
            self::$loaded_css[$escaped_src] = true;

            return '<link rel="stylesheet" href="' . static::appendVersion($escaped_src, $version) . '" type="text/css" media="' . $media . '">' . "\n";
        }

        return '';
    }

    /**
     * Get HTML code to load JS script
     *
     * @param      string       $src         The source
     * @param      null|string  $version     The version
     * @param      bool         $module      Load source as JS module
     * @param      bool         $defer       Use defer attribute to load the script
     */
    public static function jsLoad(string $src, ?string $version = '', bool $module = false, bool $defer = false): string
    {
        $escaped_src = Html::escapeHTML($src);
        if (!isset(self::$loaded_js[$escaped_src])) {
            self::$loaded_js[$escaped_src] = true;

            return '<script ' .
                ($module ? 'type="module" ' : '') .
                ($defer ? 'defer ' : '') .
                'src="' . static::appendVersion($escaped_src, $version) . '">' .
                '</script>' .
                "\n";
        }

        return '';
    }

    /**
     * Appends a version to force cache refresh if necessary.
     *
     * @param      string       $src         The source
     * @param      null|string  $version     The version
     */
    protected static function appendVersion(string $src, ?string $version = ''): string
    {
        if (App::config()->debugMode()) {
            return $src;
        }

        return $src . (str_contains($src, '?') ? '&amp;' : '?') . 'v=' . (App::config()->devMode() ? md5(uniqid()) : ($version ?: App::config()->dotclearVersion()));
    }

    /**
     * Get HTML code to load JS variables encoded as JSON
     *
     * @param      string  $id     The identifier
     * @param      mixed   $vars   The variables
     */
    public static function jsJson(string $id, $vars): string
    {
        return Html::jsJson($id, $vars);
    }

    /**
     * Get HTML code to load toggles JS
     */
    public static function jsToggles(): string
    {
        $js = [];
        if (App::auth()->prefs()->get('toggles')->prefExists('unfolded_sections')) {
            $sections = App::auth()->prefs()->get('toggles')->getStr('unfolded_sections', false);
            if ($sections !== '') {
                $unfolded_sections = explode(',', $sections);
                foreach ($unfolded_sections as $section => $v) {
                    if ($v !== '') {
                        $js[$unfolded_sections[$section]] = true;
                    }
                }
            }
        }

        return
        static::jsJson('dotclear_toggles', $js) .
        static::jsLoad('js/toggles.js');
    }

    /**
     * Get HTML code to load common JS for admin pages
     */
    public static function jsCommon(): string
    {
        $js = [
            'nonce' => App::nonce()->getNonce(),

            'img_plus_src' => 'images/expand.svg',
            'img_plus_txt' => '▶',
            'img_plus_alt' => __('uncover'),

            'img_minus_src' => 'images/hide.svg',
            'img_minus_txt' => '▼',
            'img_minus_alt' => __('hide'),

            'fold_menu'   => __('Hide menu'),
            'unfold_menu' => __('Show menu'),

            'modern' => App::config()->modern(),
        ];

        $js_msg = [
            'help'                                 => __('Need help?'),
            'new_window'                           => __('new window'),
            'help_hide'                            => __('Hide'),
            'to_select'                            => __('Select:'),
            'no_selection'                         => __('No selection'),
            'select_all'                           => __('Select all'),
            'invert_sel'                           => __('Invert selection'),
            'website'                              => __('Web site:'),
            'email'                                => __('Email:'),
            'ip_address'                           => __('IP address:'),
            'error'                                => __('Error:'),
            'entry_created'                        => __('Entry has been successfully created.'),
            'edit_entry'                           => __('Edit entry'),
            'view_entry'                           => __('view entry'),
            'confirm_delete_posts'                 => __('Are you sure you want to delete selected entries (%s)?'),
            'confirm_delete_medias'                => __('Are you sure you want to delete selected medias (%d)?'),
            'confirm_delete_categories'            => __('Are you sure you want to delete selected categories (%s)?'),
            'confirm_delete_post'                  => __('Are you sure you want to delete this entry?'),
            'click_to_unlock'                      => __('Click here to unlock the field'),
            'confirm_spam_delete'                  => __('Are you sure you want to delete all spams?'),
            'confirm_delete_comments'              => __('Are you sure you want to delete selected comments (%s)?'),
            'confirm_delete_comment'               => __('Are you sure you want to delete this comment?'),
            'cannot_delete_users'                  => __('Users with posts cannot be deleted.'),
            'confirm_delete_user'                  => __('Are you sure you want to delete selected users (%s)?'),
            'confirm_delete_blog'                  => __('Are you sure you want to delete selected blogs (%s)?'),
            'confirm_delete_category'              => __('Are you sure you want to delete category "%s"?'),
            'confirm_reorder_categories'           => __('Are you sure you want to reorder all categories?'),
            'confirm_delete_media'                 => __('Are you sure you want to remove media "%s"?'),
            'confirm_delete_directory'             => __('Are you sure you want to remove directory "%s"?'),
            'confirm_extract_current'              => __('Are you sure you want to extract archive in current directory?'),
            'confirm_remove_attachment'            => __('Are you sure you want to remove attachment "%s"?'),
            'confirm_delete_lang'                  => __('Are you sure you want to delete "%s" language?'),
            'confirm_delete_plugin'                => __('Are you sure you want to delete "%s" plugin?'),
            'confirm_delete_plugins'               => __('Are you sure you want to delete selected plugins?'),
            'use_this_theme'                       => __('Use this theme'),
            'remove_this_theme'                    => __('Remove this theme'),
            'confirm_delete_theme'                 => __('Are you sure you want to delete "%s" theme?'),
            'confirm_delete_themes'                => __('Are you sure you want to delete selected themes?'),
            'confirm_delete_backup'                => __('Are you sure you want to delete this backup?'),
            'confirm_revert_backup'                => __('Are you sure you want to revert to this backup?'),
            'zip_file_content'                     => __('Zip file content'),
            'xhtml_validator'                      => __('HTML markup validator'),
            'xhtml_valid'                          => __('HTML content is valid.'),
            'xhtml_not_valid'                      => __('There are HTML markup errors.'),
            'warning_validate_no_save_content'     => __('Attention: an audit of a content not yet registered.'),
            'confirm_change_post_format'           => __('You have unsaved changes. Switch post format will loose these changes. Proceed anyway?'),
            'confirm_change_post_format_noconvert' => __('Warning: post format change will not convert existing content. You will need to apply new format by yourself. Proceed anyway?'),
            'load_enhanced_uploader'               => __('Loading enhanced uploader, please wait.'),

            'module_author'  => __('Author:'),
            'module_details' => __('Details'),
            'module_support' => __('Support'),
            'module_help'    => __('Help:'),
            'module_section' => __('Section:'),
            'module_tags'    => __('Tags:'),

            'close_notice' => __('Ok'),

            'show_password' => __('Show password'),
            'hide_password' => __('Hide password'),

            'set_today'            => __('Reset to now'),
            'dtchange_reseturl'    => __('The publication date has changed. Reset the base name of the entry URL?'),
            'titlechange_reseturl' => __('The publication title has changed. Reset the base name of the entry URL?'),

            'adblocker' => __('An ad blocker has been detected on this Dotclear dashboard (Ghostery, Adblock plus, uBlock origin, …) and it may interfere with some features. In this case you should disable it. Note that this detection may be disabled in your preferences.'),
        ];

        try {
            $js_msg['header_update_label'] = __('Dotclear update available');
            $js_msg['header_update_link']  = App::backend()->url()->get('upgrade.upgrade');
        } catch (Exception) {
        }

        $oldies = App::config()->modern() || !App::config()->dotclearMigrate() ? '' : static::jsLoad('js/dotclear-migrate.js');

        return
        static::jsLoad('js/prepend.js') .
        static::jsLoad('js/jquery/jquery.js') .
        $oldies .
        (
            App::config()->debugMode() ?
            static::jsJson('dotclear_jquery', [
                'mute' => (!App::blog()->isDefined() || App::blog()->settings()->get('system')->getBool('jquery_migrate_mute')),
            ]) .
            static::jsLoad('js/jquery-mute.js') .
            static::jsLoad('js/jquery/jquery-migrate.js') :
            ''
        ) .

        static::jsJson('dotclear', $js) .
        static::jsJson('dotclear_msg', $js_msg) .

        static::jsLoad('js/common.js') .
        static::jsLoad('js/legacy.js') .
        static::jsLoad('js/services.js') .
        static::jsLoad('js/prelude.js');
    }

    /**
     * Get HTML code to load ads blocker detector for admin pages (usually active on dashboard and user preferences pages)
     */
    public static function jsAdsBlockCheck(): string
    {
        $adblockcheck = App::config()->checkAdsBlocker();
        if ($adblockcheck) {
            if (App::auth()->userID()) {
                $adblockcheck = !App::auth()->prefs()->get('interface')->getBool('nocheckadblocker', false);
            } else {
                // May not be set (auth page for example)
                $adblockcheck = false;
            }
        }

        return $adblockcheck ? static::jsLoad('js/ads.js') : '';
    }

    /**
     * Get HTML code to load ConfirmClose JS
     *
     * @param      mixed  ...$args  The arguments
     */
    public static function jsConfirmClose(...$args): string
    {
        $js = [
            'prompt'     => __('You have unsaved changes.'),
            'lowbattery' => __('your battery charge seems low (%d%) and you have unsaved changes, you should save them.'),
            'forms'      => $args,
        ];

        return
        static::jsJson('confirm_close', $js) .
        static::jsLoad('js/confirm-close.js');
    }

    /**
     * Get HTML code to load page tabs JS
     *
     * @param      mixed   $default  The default
     */
    public static function jsPageTabs($default = null): string
    {
        $js = [
            'default' => $default,
        ];

        return
        static::jsJson('page_tabs', $js) .
        static::jsLoad('js/page-tabs-helper.js') .
        static::jsLoad('js/page-tabs.js');
    }

    /**
     * Get HTML code to load Magnific popup JS
     */
    public static function jsModal(): string
    {
        return
        static::jsLoad('js/jquery/jquery.magnific-popup.js');
    }

    /**
     * Get HTML to load Upload JS utility
     */
    public static function jsUpload(): string
    {
        $request_uri = isset($_SERVER['REQUEST_URI']) && is_string($request_uri = $_SERVER['REQUEST_URI']) ? $request_uri : '';

        $js_msg = [
            'enhanced_uploader_activate' => __('Temporarily activate enhanced uploader'),
            'enhanced_uploader_disable'  => __('Temporarily disable enhanced uploader'),
        ];

        $js = [
            'msg' => [
                'limit_exceeded'             => __('Limit exceeded.'),
                'size_limit_exceeded'        => __('File size exceeds allowed limit.'),
                'canceled'                   => __('Canceled.'),
                'http_error'                 => __('HTTP Error:'),
                'error'                      => __('Error:'),
                'choose_file'                => __('Choose file'),
                'choose_files'               => __('Choose files'),
                'cancel'                     => __('Cancel'),
                'clean'                      => __('Clean'),
                'upload'                     => __('Upload'),
                'send'                       => __('Send'),
                'file_successfully_uploaded' => __('File successfully uploaded.'),
                'no_file_in_queue'           => __('No file in queue.'),
                'file_in_queue'              => __('1 file in queue.'),
                'files_in_queue'             => __('%d files in queue.'),
                'queue_error'                => __('Queue error:'),
            ],
            'base_url' => Path::clean(dirname((string) preg_replace('/(\?.*$)?/', '', $request_uri))) . '/',
        ];

        return
        static::jsJson('file_upload', $js) .
        static::jsJson('file_upload_msg', $js_msg) .
        static::jsLoad('js/file-upload.js') .
        static::jsLoad('js/jquery/jquery-ui.custom.js') .
        static::jsLoad('js/jsUpload/tmpl.js') .
        static::jsLoad('js/jsUpload/template-upload.js') .
        static::jsLoad('js/jsUpload/template-download.js') .
        static::jsLoad('js/jsUpload/load-image.js') .
        static::jsLoad('js/jsUpload/jquery.iframe-transport.js') .
        static::jsLoad('js/jsUpload/jquery.fileupload.js') .
        static::jsLoad('js/jsUpload/jquery.fileupload-process.js') .
        static::jsLoad('js/jsUpload/jquery.fileupload-resize.js') .
        static::jsLoad('js/jsUpload/jquery.fileupload-ui.js');
    }

    /**
     * Get HTML code to load meta editor
     */
    public static function jsMetaEditor(): string
    {
        return static::jsLoad('js/meta-editor.js');
    }

    /**
     * Get HTML code for filters control JS utility
     *
     * @param      bool    $show   Show filters?
     */
    public static function jsFilterControl(bool $show = true): string
    {
        $js = [
            'show_filters'      => $show,
            'filter_posts_list' => __('Show filters and display options'),
            'cancel_the_filter' => __('Cancel filters and display options'),
        ];

        return
        static::jsJson('filter_controls', $js) .
        static::jsJson('filter_options', ['auto_filter' => App::auth()->prefs()->get('interface')->getBool('auto_filter', false)]) .
        static::jsLoad('js/filter-controls.js');
    }

    /**
     * Get HTML code to load Codemirror
     *
     * @param      string           $theme  The theme
     * @param      bool             $multi  Is multiplex?
     * @param      array<string>    $modes  The modes
     */
    public static function jsLoadCodeMirror(string $theme = '', bool $multi = true, array $modes = ['css', 'htmlmixed', 'javascript', 'php', 'xml', 'clike']): string
    {
        $ret = static::cssLoad('js/codemirror/lib/codemirror.css') .
        static::jsLoad('js/codemirror/lib/codemirror.js');

        /**
         * Allow 3rd party plugin to add their own textarea, the given ArrayObject should be completed with the
         * list of required modes (css, htmlmixed, javascript, php, xml, clike).
         *
         * Example:
         *
         * $tab->append('xml');
         */
        $alt = new ArrayObject();
        # --BEHAVIOR-- adminLoadCodeMirror -- array
        App::behavior()->callBehavior('adminLoadCodeMirror', $alt);
        foreach ($alt as $item) {
            if (!in_array($item, $modes)) {
                $modes[] = $item;
            }
        }

        if ($multi) {
            $ret .= static::jsLoad('js/codemirror/addon/mode/multiplex.js');
        }

        foreach ($modes as $mode) {
            $ret .= static::jsLoad('js/codemirror/mode/' . $mode . '/' . $mode . '.js');
        }

        $ret .= static::jsLoad('js/codemirror/addon/edit/closebrackets.js') .
        static::jsLoad('js/codemirror/addon/edit/matchbrackets.js') .
        static::cssLoad('js/codemirror/addon/display/fullscreen.css') .
        static::jsLoad('js/codemirror/addon/display/fullscreen.js');
        if ($theme !== '' && $theme !== 'default') {
            $ret .= static::cssLoad('js/codemirror/theme/' . $theme . '.css');
        }

        return $ret;
    }

    /**
     * Get HTML code to run Codemirror
     *
     * @param      mixed        $name   The HTML name attribute
     * @param      null|string  $id     The HTML id attribute
     * @param      mixed        $mode   The Codemirror mode
     * @param      string       $theme  The theme
     */
    public static function jsRunCodeMirror($name, ?string $id = null, $mode = null, string $theme = ''): string
    {
        if (is_array($name)) {
            $js = $name;
        } else {
            $js = [[
                'name'  => $name,
                'id'    => $id,
                'mode'  => $mode,
                'theme' => $theme ?: 'default',
            ]];
        }

        /**
         * Allow 3rd party plugin to add their own textarea, the given ArrayObject should be completed with the
         * same structure (string name, string id, string mode, string theme).
         *
         * Example:
         *
         * $tab->append([
         *     'name'  => 'my_editor_css',  // Editor id (should be unique)
         *     'id'    => 'css_content',    // Textarea id
         *     'mode'  => 'css',            // Codemirror mode ()
         *     'theme' => App::auth()->prefs()->get('interface')->getStr('colorsyntax_theme', false) ?: 'default'
         * ]);
         */
        $alt = new ArrayObject();
        # --BEHAVIOR-- adminRunCodeMirror -- array
        App::behavior()->callBehavior('adminRunCodeMirror', $alt);
        foreach ($alt as $item) {
            $js[] = [
                'name'  => $item['name'],
                'id'    => $item['id'],
                'mode'  => $item['mode'],
                'theme' => $item['theme'] ?: 'default',
            ];
        }

        return
        static::jsJson('codemirror', $js) .
        static::jsLoad('js/codemirror.js');
    }

    /**
     * Gets the codemirror themes list.
     *
     * @param      bool         $light_dark     True if returned array will separate light and dark themes
     *
     * @return     array<string>|array<array-key, array<array-key, string>>  The code mirror themes.
     */
    public static function getCodeMirrorThemes(bool $light_dark = false): array
    {
        $themes            = [];
        $themes_list_dark  = [];
        $themes_list_light = [];

        $themes_root = implode(DIRECTORY_SEPARATOR, [__DIR__,  '..', '..', '..', 'admin', 'js','codemirror','theme']);
        if (is_dir($themes_root) && is_readable($themes_root) && ($d = @dir($themes_root)) !== false) {
            $isBrightColor = function (
                string $color,  // Must be in hexadecimal form (ex: #ab65c3), with or without # prefix ; may be shorten (ex: #fff)
            ): bool {
                $color = trim($color, '#');
                if (strlen($color) === 3) {
                    $color .= $color;
                }

                // Calculate the brightness of the color
                $red   = hexdec(substr($color, 0, 2));
                $green = hexdec(substr($color, 2, 2));
                $blue  = hexdec(substr($color, 4, 2));

                $brightness = (($red * 299) + ($green * 587) + ($blue * 114)) / 1000;

                // Return true if color is light, false if dark
                return $brightness >= 128;
            };

            while (($entry = $d->read()) !== false) {
                if ($entry !== '.' && $entry !== '..' && !str_starts_with($entry, '.') && is_readable($themes_root . '/' . $entry)) {
                    $name = substr($entry, 0, -4); // remove .css extension
                    if ($light_dark) {
                        // get background color to determine if it is a dark or light theme
                        $buffer = file_get_contents($themes_root . DIRECTORY_SEPARATOR . $entry);
                        if ($buffer) {
                            // Find .CodeMirror {…} declaration
                            $css = [];
                            if (preg_match('/(?:\s)*\.CodeMirror {((?:[^}])*)}/m', $buffer, $css)) {
                                // Find background color in .CodeMirror {…} declaration
                                $css_background = [];
                                if (preg_match('/(?:\s)*background(?:-color)*:\s#([0-9a-f]{3,6})/m', $css[1], $css_background)) {
                                    $color = $css_background[1];
                                    // Check if background color is dark or light
                                    if ($isBrightColor($color)) {
                                        $themes_list_light[] = $name;
                                    } else {
                                        $themes_list_dark[] = $name;
                                    }
                                }
                            }
                        }
                    } else {
                        $themes[] = $name;
                    }
                }
            }

            if ($light_dark) {
                sort($themes_list_light);
                sort($themes_list_dark);
                $themes = [$themes_list_light, $themes_list_dark];
            } else {
                sort($themes);
            }
        }

        return $themes;
    }

    /**
     * Gets plugin file.
     *
     * @param      string  $file   The filename
     *
     * @return     string  The URL.
     */
    public static function getPF(string $file): string
    {
        return App::backend()->url()->get('load.plugin.file', ['pf' => $file], '&');
    }

    /**
     * Gets theme file.
     *
     * @param      string  $file   The filename
     *
     * @return     string  The URL.
     */
    public static function getTF(string $file): string
    {
        return App::backend()->url()->get('load.theme.file', ['tf' => $file], '&');
    }

    /**
     * Gets var file.
     *
     * @param      string  $file   The filename
     *
     * @return     string  The URL.
     */
    public static function getVF(string $file): string
    {
        return App::backend()->url()->get('load.var.file', ['vf' => $file], '&');
    }

    /**
     * Sets the x frame options.
     *
     * @param      array<string, string>|ArrayObject<string, string>    $headers  The headers
     * @param      mixed                                                $origin   The origin
     */
    public static function setXFrameOptions(array|ArrayObject $headers, $origin = null): void
    {
        if (self::$xframe_loaded) {
            return;
        }

        if (is_string($origin)) {
            $url                        = parse_url($origin);
            $headers['x-frame-options'] = sprintf('X-Frame-Options: %s', is_array($url) && isset($url['host']) ?
                ('ALLOW-FROM ' . (isset($url['scheme']) ? $url['scheme'] . ':' : '') . '//' . $url['host']) :
                'SAMEORIGIN');
        } else {
            $headers['x-frame-options'] = 'X-Frame-Options: SAMEORIGIN'; // FF 3.6.9+ Chrome 4.1+ IE 8+ Safari 4+ Opera 10.5+
        }

        self::$xframe_loaded = true;
    }

    // Deprecated methods
    // ------------------

    /**
     * @deprecated  since 2.24, permanetly removed
     */
    public static function help(): void
    {
        App::deprecated()->set('', '2.24');

        # Deprecated but we keep this for plugins.
    }

    /**
     * @deprecated  since 2.16, permanetly removed
     */
    public static function jsColorPicker(): string
    {
        App::deprecated()->set('', '2.16');

        return '';
    }

    /**
     * Get HTML code for date picker JS utility
     *
     * @deprecated  since 2.21, permanetly removed
     */
    public static function jsDatePicker(): string
    {
        App::deprecated()->set('', '2.21');

        return '';
    }

    /**
     * Load jsToolBar
     *
     * @deprecated  since 2.??, permanetly removed
     */
    public static function jsToolBar(): string
    {
        App::deprecated()->set('', '2.21');

        # Deprecated but we keep this for plugins.

        return '';
    }

    /**
     * return a javascript variable definition line code
     *
     * @deprecated  since 2.15, use App::backend()->page()->jsJson() and dotclear.getData()/dotclear.mergeDeep() in javascript instead
     *
     * @param      string        $name       variable name
     * @param      mixed         $value      value
     */
    public static function jsVar(string $name, mixed $value): string
    {
        App::deprecated()->set('App::backend()->page()->jsJson() and dotclear.getData()/dotclear.mergeDeep() in javascript', '2.15');

        // @phpstan-ignore cast.string (will not spend time on deprecated code)
        return $name . " = '" . Html::escapeJS((string) $value) . "';\n";
    }

    /**
     * return a list of javascript variables définitions code
     *
     * @deprecated since 2.15, use App::backend()->page()->jsJson() and dotclear.getData()/dotclear.mergeDeep() in javascript intead
     *
     * @param      array<string, mixed>  $vars   The variables
     *
     * @return     string  javascript code (inside <script></script>)
     */
    public static function jsVars(array $vars): string
    {
        App::deprecated()->set('App::backend()->page()->jsJson() and dotclear.getData()/dotclear.mergeDeep() in javascript', '2.15');

        $ret = '<script>' . "\n";
        foreach ($vars as $var => $value) {
            // @phpstan-ignore cast.string (will not spend time on deprecated code)
            // @phpstan-ignore binaryOp.invalid (---)
            $ret .= $var . ' = ' . (is_string($value) ? "'" . Html::escapeJS($value) . "'" : $value) . ';' . "\n";
        }

        return $ret . "</script>\n";
    }

    /**
     * @deprecated  since 2.11, permanetly removed
     */
    public static function jsLoadIE7(): string
    {
        App::deprecated()->set('', '2.11', '2.27');

        return '';
    }

    /**
     * @deprecated  since 2.27, use My::cssLoad() instead
     *
     * @param      string       $src         The source
     * @param      string       $media       The media
     * @param      null|string  $version     The version
     */
    public static function cssModuleLoad(string $src, string $media = 'screen', ?string $version = ''): string
    {
        App::deprecated()->set('My::cssLoad()', '2.27');

        return static::cssLoad(urldecode(static::getPF($src)), $media, $version);
    }

    /**
     * @deprecated  since 2.27, use My::jsLoad() intead
     *
     * @param      string       $src         The source
     * @param      null|string  $version     The version
     * @param      bool         $module      Load source as JS module
     */
    public static function jsModuleLoad(string $src, ?string $version = '', bool $module = false): string
    {
        App::deprecated()->set('My::jsLoad()', '2.27');

        return static::jsLoad(urldecode(static::getPF($src)), $version, $module);
    }
}
