<?php
/**
 * Used to render the header of PMA's pages
 */

declare(strict_types=1);

namespace PhpMyAdmin;

use PhpMyAdmin\Clock\Clock;
use PhpMyAdmin\Config\UserPreferences;
use PhpMyAdmin\Config\UserPreferencesHandler;
use PhpMyAdmin\ConfigStorage\Relation;
use PhpMyAdmin\Console\Console;
use PhpMyAdmin\Container\ContainerBuilder;
use PhpMyAdmin\Dbal\DatabaseInterface;
use PhpMyAdmin\Html\Generator;
use PhpMyAdmin\I18n\LanguageManager;
use PhpMyAdmin\Navigation\Navigation;
use PhpMyAdmin\Theme\ThemeManager;
use Psr\Clock\ClockInterface;

use function array_merge;
use function htmlspecialchars;
use function implode;
use function ini_get;
use function json_encode;

use const JSON_HEX_TAG;

/**
 * Class used to output the HTTP and HTML headers
 */
class Header
{
    private Scripts|null $scripts = null;
    private Menu|null $menu = null;

    /**
     * The page title
     */
    private string $title = '';
    /**
     * The value for the id attribute for the body tag
     */
    private string $bodyId = '';

    /** Whether to show the top menu */
    private bool|null $isMenuEnabled = null;

    /**
     * Whether to show the warnings
     */
    private bool $warningsEnabled = true;

    private bool $isTransformationWrapper = false;

    public function __construct(
        private readonly Template $template,
        private readonly Console $console,
        private readonly Config $config,
        private readonly DatabaseInterface $dbi,
        private readonly Relation $relation,
        private readonly UserPreferences $userPreferences,
        private readonly UserPreferencesHandler $userPreferencesHandler,
    ) {
    }

    private function isMenuEnabled(): bool
    {
        if ($this->isMenuEnabled !== null) {
            return $this->isMenuEnabled;
        }

        $this->isMenuEnabled = $this->dbi->isConnected();

        return $this->isMenuEnabled;
    }

    public function getScripts(): Scripts
    {
        if ($this->scripts !== null) {
            return $this->scripts;
        }

        $this->scripts = new Scripts($this->template);

        $this->scripts->addFile('runtime.js');
        $this->scripts->addFile('vendor/jquery/jquery.min.js');
        $this->scripts->addFile('vendor/jquery/jquery-migrate.min.js');
        $this->scripts->addFile('vendor/sprintf.js');
        $this->scripts->addFile('vendor/jquery/jquery-ui.min.js');
        $this->scripts->addFile('vendor/bootstrap/bootstrap.js');
        $this->scripts->addFile('vendor/js.cookie.min.js');
        $this->scripts->addFile('vendor/jquery/jquery.validate.min.js');
        $this->scripts->addFile('vendor/jquery/jquery-ui-timepicker-addon.min.js');
        $this->scripts->addFile('index.php', ['route' => '/messages', 'l' => Current::$lang]);
        $this->scripts->addFile('shared.js');
        $this->scripts->addFile('menu_resizer.js');
        $this->scripts->addFile('main.js');

        $this->scripts->addCode($this->getJsParamsCode());

        return $this->scripts;
    }

    /**
     * Returns, as an array, a list of parameters
     * used on the client side
     *
     * @return mixed[]
     */
    public function getJsParams(): array
    {
        $pftext = $_SESSION['tmpval']['pftext'] ?? '';

        $params = [
            // Do not add any separator, JS code will decide
            'common_query' => Url::getCommonRaw([], ''),
            'opendb_url' => Url::getFromRoute($this->config->config->DefaultTabDatabase),
            'lang' => Current::$lang,
            'server' => Current::$server,
            'table' => Current::$table,
            'db' => Current::$database,
            'token' => Session::getToken(),
            'text_dir' => LanguageManager::$textDirection->value,
            'LimitChars' => $this->config->config->limitChars,
            'pftext' => $pftext,
            'confirm' => $this->config->config->Confirm,
            'LoginCookieValidity' => $this->config->config->LoginCookieValidity,
            'session_gc_maxlifetime' => (int) ini_get('session.gc_maxlifetime'),
            'logged_in' => $this->dbi->isConnected(),
            'is_https' => $this->config->isHttps(),
            'rootPath' => $this->config->getRootPath(),
            'arg_separator' => Url::getArgSeparator(),
            'version' => Version::VERSION,
        ];
        if ($this->config->hasSelectedServer()) {
            $params['auth_type'] = $this->config->selectedServer['auth_type'];
            if (isset($this->config->selectedServer['user'])) {
                $params['user'] = $this->config->selectedServer['user'];
            }
        }

        return $params;
    }

    /**
     * Returns, as a string, a list of parameters
     * used on the client side
     */
    public function getJsParamsCode(): string
    {
        $params = $this->getJsParams();

        return 'window.Navigation.update(window.CommonParams.setAll(' . json_encode($params, JSON_HEX_TAG) . '));';
    }

    public function getMenu(): Menu
    {
        if ($this->menu !== null) {
            return $this->menu;
        }

        $this->menu = new Menu(
            $this->dbi,
            $this->template,
            $this->config,
            $this->relation,
            Current::$database,
            Current::$table,
        );

        return $this->menu;
    }

    /**
     * Setter for the ID attribute in the BODY tag
     *
     * @param string $id Value for the ID attribute
     */
    public function setBodyId(string $id): void
    {
        $this->bodyId = htmlspecialchars($id);
    }

    /**
     * Setter for the title of the page
     *
     * @param string $title New title
     */
    public function setTitle(string $title): void
    {
        $this->title = htmlspecialchars($title);
    }

    /**
     * Disables the display of the top menu
     */
    public function disableMenuAndConsole(): void
    {
        $this->isMenuEnabled = false;
        $this->console->disable();
    }

    /**
     * Disables the display of the top menu
     */
    public function disableWarnings(): void
    {
        $this->warningsEnabled = false;
    }

    /** @return array<string, mixed> */
    public function getDisplay(ResponseRenderer $responseRenderer): array
    {
        $themeManager = ContainerBuilder::getContainer()->get(ThemeManager::class);
        $theme = $themeManager->theme;
        $scripts = $this->getScripts();
        $userAgent = Core::getEnv('HTTP_USER_AGENT');

        // The user preferences have been merged at this point
        // so we can conditionally add CodeMirror, other scripts and settings
        // See #20159, why we need to check for HTTP_USER_AGENT here
        if ($this->config->config->CodemirrorEnable && $userAgent !== '') {
            $scripts->addFile('vendor/codemirror/lib/codemirror.js');
            $scripts->addFile('vendor/codemirror/mode/sql/sql.js');
            $scripts->addFile('vendor/codemirror/addon/runmode/runmode.js');
            $scripts->addFile('vendor/codemirror/addon/hint/show-hint.js');
            $scripts->addFile('vendor/codemirror/addon/hint/sql-hint.js');
            if ($this->config->config->LintEnable) {
                $scripts->addFile('vendor/codemirror/addon/lint/lint.js');
                $scripts->addFile('codemirror/addon/lint/sql-lint.js');
            }
        }

        if ($this->config->config->SendErrorReports !== 'never') {
            $scripts->addFile('vendor/tracekit.js');
            $scripts->addFile('error_report.js');
        }

        if ($this->config->config->enable_drag_drop_import) {
            $scripts->addFile('drag_drop_import.js');
        }

        if (! $this->config->config->DisableShortcutKeys) {
            $scripts->addFile('shortcuts_handler.js');
        }

        $scripts->addCode($this->getVariablesForJavaScript());

        $scripts->addCode('ConsoleEnterExecutes=' . ($this->config->config->ConsoleEnterExecutes ? 'true' : 'false'));
        $scripts->addFiles($this->console->getScripts());

        if ($this->isMenuEnabled() && Current::$server > 0) {
            $navigation = (new Navigation($this->template, $this->relation, $this->dbi, $this->config))
                ->getDisplay($responseRenderer);
        }

        $customHeader = self::renderHeader();

        // offer to load user preferences from localStorage
        if (
            $this->userPreferencesHandler->storageType === 'session'
            && ! isset($_SESSION['userprefs_autoload'])
        ) {
            $loadUserPreferences = $this->userPreferences->autoloadGetHeader();
        }

        $menu = '';
        if ($this->isMenuEnabled() && Current::$server > 0) {
            $menu = $this->getMenu()->getDisplay();
        }

        $console = $this->console->getDisplay();
        $messages = $this->getMessage();
        $isLoggedIn = $this->dbi->isConnected();

        $scripts->addFile('datetimepicker.js');
        $scripts->addFile('validator-messages.js');

        return [
            'lang' => Current::$lang,
            'allow_third_party_framing' => $this->config->config->AllowThirdPartyFraming,
            'codemirror_enable' => $this->config->config->CodemirrorEnable,
            'lint_enable' => $this->config->config->LintEnable,
            'theme_path' => $theme->getPath(),
            'server' => Current::$server,
            'title' => $this->getPageTitle(),
            'scripts' => $scripts->getDisplay(),
            'body_id' => $this->bodyId,
            'navigation' => $navigation ?? '',
            'custom_header' => $customHeader,
            'load_user_preferences' => $loadUserPreferences ?? '',
            'show_hint' => $this->config->config->ShowHint,
            'is_warnings_enabled' => $this->warningsEnabled,
            'is_menu_enabled' => $this->isMenuEnabled(),
            'is_logged_in' => $isLoggedIn,
            'menu' => $menu,
            'console' => $console,
            'messages' => $messages,
            'theme_color_mode' => $theme->getColorMode(),
            'theme_color_modes' => $theme->getColorModes(),
            'theme_id' => $theme->getId(),
            'current_user' => $this->dbi->getCurrentUserAndHost(),
            'is_mariadb' => $this->dbi->isMariaDB(),
        ];
    }

    /**
     * Returns the message to be displayed at the top of
     * the page, including the executed SQL query, if any.
     */
    public function getMessage(): string
    {
        $retval = '';
        $message = '';
        if (Current::$message !== null) {
            $message = Current::$message;
            Current::$message = null;
        } elseif (! empty($_REQUEST['message'])) {
            $message = $_REQUEST['message'];
        }

        if ($message !== '') {
            $retval .= Generator::getMessage($message);
        }

        return $retval;
    }

    /** @return array<string, string> */
    public function getHttpHeaders(ClockInterface|null $clock = null): array
    {
        $headers = [
            'Referrer-Policy' => 'same-origin',

            'Content-Security-Policy' => $this->getCspHeader(),

            /**
             * Re-enable possible disabled XSS filters.
             *
             * @see https://developer.mozilla.org/docs/Web/HTTP/Headers/X-XSS-Protection
             */
            'X-XSS-Protection' => '1; mode=block',

            /**
             * "nosniff", prevents Internet Explorer and Google Chrome from MIME-sniffing
             * a response away from the declared content-type.
             *
             * @see https://developer.mozilla.org/docs/Web/HTTP/Headers/X-Content-Type-Options
             */
            'X-Content-Type-Options' => 'nosniff',

            /**
             * Adobe cross-domain-policies.
             *
             * @see https://www.sentrium.co.uk/labs/application-security-101-http-headers
             */
            'X-Permitted-Cross-Domain-Policies' => 'none',

            /**
             * Robots meta tag.
             *
             * @see https://developers.google.com/search/docs/crawling-indexing/robots-meta-tag
             */
            'X-Robots-Tag' => 'noindex, nofollow',

            /**
             * The HTTP Permissions-Policy header provides a mechanism to allow and deny
             * the use of browser features in a document
             * or within any <iframe> elements in the document.
             *
             * @see https://developer.mozilla.org/docs/Web/HTTP/Headers/Permissions-Policy
             */
            'Permissions-Policy' => 'fullscreen=(self), interest-cohort=()',
        ];

        $headers = array_merge($headers, Core::getNoCacheHeaders($clock ?? new Clock()));

        /**
         * A different Content-Type is set in {@see \PhpMyAdmin\Controllers\Transformation\WrapperController}.
         */
        if (! $this->isTransformationWrapper) {
            // Define the charset to be used
            $headers['Content-Type'] = 'text/html; charset=utf-8';
        }

        return $headers;
    }

    /**
     * If the page is missing the title, this function
     * will set it to something reasonable
     */
    public function getPageTitle(): string
    {
        if ($this->title === '') {
            if (Current::$server > 0) {
                if (Current::$table !== '') {
                    $tempTitle = $this->config->config->TitleTable;
                } elseif (Current::$database !== '') {
                    $tempTitle = $this->config->config->TitleDatabase;
                } elseif ($this->config->selectedServer['host'] !== '') {
                    $tempTitle = $this->config->config->TitleServer;
                } else {
                    $tempTitle = $this->config->config->TitleDefault;
                }

                $this->title = htmlspecialchars(Util::expandUserString($this->dbi, $this->config, $tempTitle));
            } else {
                $this->title = 'phpMyAdmin';
            }
        }

        return $this->title;
    }

    /** Get the Content-Security-Policy header */
    private function getCspHeader(): string
    {
        $mapTileUrl = ' https://tile.openstreetmap.org';
        $cspAllow = $this->config->config->CSPAllow === '' ? '' : ' ' . $this->config->config->CSPAllow;
        $captchaUrl =
            $this->config->config->CaptchaLoginPrivateKey === '' ||
            $this->config->config->CaptchaLoginPublicKey === '' ||
            $this->config->config->CaptchaApi === '' ||
            $this->config->config->CaptchaRequestParam === '' ||
            $this->config->config->CaptchaResponseParam === ''
                ? ''
                : ' ' . $this->config->config->CaptchaCsp;

        $csp = [
            "default-src 'self'" . $captchaUrl . $cspAllow,
            "img-src 'self' data:" . $captchaUrl . $cspAllow . $mapTileUrl,
            "object-src 'none'",
            "script-src 'self' 'unsafe-inline' 'unsafe-eval'" . $captchaUrl . $cspAllow,
            "style-src 'self' 'unsafe-inline'" . $captchaUrl . $cspAllow,
        ];

        // Prevent click-jacking by disabling inline-framing
        if ($this->config->config->AllowThirdPartyFraming === 'sameorigin') {
            $csp[] = "frame-ancestors 'self'";
        } elseif ($this->config->config->AllowThirdPartyFraming !== true) {
            $csp[] = "frame-ancestors 'none'";
        }

        return implode('; ', $csp) . ';';
    }

    private function getVariablesForJavaScript(): string
    {
        $maxInputVars = ini_get('max_input_vars');
        $maxInputVarsValue = $maxInputVars === false || $maxInputVars === '' ? 'false' : (int) $maxInputVars;

        return $this->template->render('javascript/variables', [
            'first_day_of_calendar' => $this->config->config->FirstDayOfCalendar,
            'max_input_vars' => $maxInputVarsValue,
        ]);
    }

    public function setIsTransformationWrapper(bool $isTransformationWrapper): void
    {
        $this->isTransformationWrapper = $isTransformationWrapper;
    }

    public function getConsole(): Console
    {
        return $this->console;
    }

    /**
     * Renders user configured footer
     */
    public static function renderHeader(): string
    {
        return Generator::renderCustom(CUSTOM_HEADER_FILE, 'pma_header');
    }
}