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

declare(strict_types=1);

namespace PhpMyAdmin;

use PhpMyAdmin\Error\ErrorHandler;
use PhpMyAdmin\Html\Generator;
use PhpMyAdmin\Routing\Routing;
use Traversable;

use function basename;
use function in_array;
use function is_array;
use function is_object;
use function json_encode;
use function json_last_error;

/**
 * Class used to output the footer
 */
class Footer
{
    /**
     * Scripts instance
     */
    private Scripts $scripts;

    /**
     * Whether to only close the BODY and HTML tags
     * or also include scripts, errors and links
     */
    private bool $isMinimal = false;

    public function __construct(Template $template, private readonly Config $config)
    {
        $this->scripts = new Scripts($template);
    }

    /**
     * Remove recursions and iterator objects from an object
     *
     * @param mixed   $object Object to clean
     * @param mixed[] $stack  Stack used to keep track of recursion, need not be passed for the first time
     *
     * @return mixed Reference passed object
     */
    private static function removeRecursion(mixed &$object, array $stack = []): mixed
    {
        if ((is_object($object) || is_array($object)) && $object) {
            if ($object instanceof Traversable) {
                $object = '***ITERATOR***';
            } elseif (! in_array($object, $stack, true)) {
                $stack[] = $object;
                // @phpstan-ignore-next-line
                foreach ($object as &$subObject) {
                    self::removeRecursion($subObject, $stack);
                }
            } else {
                $object = '***RECURSION***';
            }
        }

        return $object;
    }

    /**
     * Renders the debug messages
     */
    public function getDebugMessage(): string
    {
        $retval = '\'false\'';
        if ($this->config->config->debug->sql && empty($_REQUEST['no_debug']) && ! empty($_SESSION['debug'])) {
            // Remove recursions and iterators from $_SESSION['debug']
            self::removeRecursion($_SESSION['debug']);

            $retval = (string) json_encode($_SESSION['debug']);
            $_SESSION['debug'] = [];

            return json_last_error() !== 0 ? '\'false\'' : $retval;
        }

        $_SESSION['debug'] = [];

        return $retval;
    }

    /**
     * Returns the url of the current page
     */
    public function getSelfUrl(): string
    {
        $params = [];
        $params['route'] = Routing::$route;

        if (Current::$database !== '') {
            $params['db'] = Current::$database;
        }

        if (Current::$table !== '') {
            $params['table'] = Current::$table;
        }

        $params['server'] = Current::$server;

        if (isset($_REQUEST['single_table'])) {
            $params['single_table'] = $_REQUEST['single_table'];
        }

        return basename(Core::getEnv('SCRIPT_NAME')) . Url::getCommonRaw($params);
    }

    /**
     * Renders the link to open a new page
     */
    public function getErrorMessages(): string
    {
        $retval = '';
        $errorHandler = ErrorHandler::getInstance();
        if ($errorHandler->hasDisplayErrors()) {
            $retval .= $errorHandler->getDispErrors();
        }

        /**
         * Report php errors
         */
        $errorHandler->reportErrors();

        return $retval;
    }

    /**
     * Turn on minimal display mode
     */
    public function setMinimal(): void
    {
        $this->isMinimal = true;
    }

    /**
     * Returns the Scripts object
     *
     * @return Scripts object
     */
    public function getScripts(): Scripts
    {
        return $this->scripts;
    }

    /** @return mixed[] */
    public function getDisplay(): array
    {
        if (! $this->isMinimal) {
            if (Core::getEnv('SCRIPT_NAME') !== '') {
                $url = $this->getSelfUrl();
            }

            $this->scripts->addCode('window.Console.debugSqlInfo = ' . $this->getDebugMessage() . ';');
            $errorMessages = $this->getErrorMessages();
            $scripts = $this->scripts->getDisplay();

            if ($this->config->config->debug->demo) {
                $git = new Git(true, ROOT_PATH);
                $gitRevisionInfo = $git->getGitRevisionInfo();
            }

            $footer = self::renderFooter();
        }

        return [
            'is_minimal' => $this->isMinimal,
            'self_url' => $url ?? null,
            'error_messages' => $errorMessages ?? '',
            'scripts' => $scripts ?? '',
            'is_demo' => $this->config->config->debug->demo,
            'git_revision_info' => $gitRevisionInfo ?? [],
            'footer' => $footer ?? '',
        ];
    }

    /**
     * Renders user configured footer
     */
    public static function renderFooter(): string
    {
        return Generator::renderCustom(CUSTOM_FOOTER_FILE, 'pma_footer');
    }
}