<?php

/**
 * JCH Optimize - Performs several front-end optimizations for fast downloads
 *
 * @package   jchoptimize/wordpress-platform
 * @author    Samuel Marshall <samuel@jch-optimize.net>
 * @copyright Copyright (c) 2020 Samuel Marshall / JCH Optimize
 * @license   GNU/GPLv3, or later. See LICENSE file
 *
 * If LICENSE file missing, see <http://www.gnu.org/licenses/>.
 */

namespace JchOptimize\WordPress\Plugin;

use _JchOptimizeVendor\V91\Joomla\DI\ContainerAwareInterface;
use _JchOptimizeVendor\V91\Joomla\DI\ContainerAwareTrait;
use _JchOptimizeVendor\V91\Joomla\Input\Input;
use _JchOptimizeVendor\V91\Laminas\Cache\Exception\ExceptionInterface;
use _JchOptimizeVendor\V91\Psr\Log\LoggerAwareInterface;
use _JchOptimizeVendor\V91\Psr\Log\LoggerAwareTrait;
use _JchOptimizeVendor\V91\Psr\Log\LogLevel;
use Exception;
use JchOptimize\Core\Helper;
use JchOptimize\Core\Optimize;
use JchOptimize\Core\PageCache\CaptureCache;
use JchOptimize\Core\PageCache\PageCache;
use JchOptimize\Core\Platform\UtilityInterface;
use JchOptimize\Core\Registry;
use JchOptimize\Core\Settings;
use JchOptimize\Core\SystemUri\SystemUri;
use JchOptimize\WordPress\Container\ContainerFactory;
use JchOptimize\WordPress\Model\ReCache;
use WP_Admin_Bar;

use function add_action;
use function add_filter;
use function apply_filters;
use function current_user_can;
use function defined;
use function delete_option;
use function do_action;
use function gmdate;
use function get_option;
use function http_response_code;
use function is_admin;
use function load_plugin_textdomain;
use function max;
use function plugin_basename;
use function register_activation_hook;
use function register_uninstall_hook;
use function time;
use function update_option;
use function wp_is_mobile;

use const JCH_PRO;
use const SHORTINIT;
use const WP_USE_THEMES;
use const WPMU_PLUGIN_DIR;

class Loader implements LoggerAwareInterface, ContainerAwareInterface
{
    use LoggerAwareTrait;
    use ContainerAwareTrait;

    public function __construct(
        private Registry $params,
        private Admin $admin,
        private Installer $installer,
        private PageCache $pageCache,
        private UtilityInterface $utility,
        private ?Updater $updater = null,
    ) {
    }

    /**
     * Function register_uninstall_hook can only be used with a static method
     *
     * @return void
     */
    public static function runUninstallRoutines(): void
    {
        /** @var Installer $installer */
        $installer = ContainerFactory::create()->get(Installer::class);
        $installer->deactivate();
    }

    public function preboot_init(): void
    {
        if (false !== ($settings = get_option('jch_options'))) {
            update_option('jch-optimize_settings', $settings);
            delete_option('jch_options');
        }
    }

    public function init(): void
    {
        $this->runActivationRoutines();

        if (is_admin()) {
            if (defined('DOING_AJAX')) { //Ajax functions
                add_action('wp_ajax_filetree', [$this->admin, 'doAjaxFileTree']);
                add_action('wp_ajax_multiselect', [$this->admin, 'doAjaxMultiSelect']);
                add_action('wp_ajax_optimizeimages', [$this->admin, 'doAjaxOptimizeImages']);
                add_action('wp_ajax_configuresettings', [$this->admin, 'doAjaxConfigureSettings']);
                add_action('wp_ajax_getcacheinfo', [$this->admin, 'doAjaxGetCacheInfo']);
                add_action('wp_ajax_onclickicon', [$this->admin, 'doAjaxOnClickIcon']);
                add_action('wp_ajax_jch_configure_js_table_body', [$this->admin, 'doAjaxJchConfigureJsTableBody']);
                add_action('wp_ajax_jch_configure_js_auto_save', [$this->admin, 'doAjaxJchConfigureJsAutoSave']);
                add_action('wp_ajax_jch_cf_verify', [$this->admin, 'doAjaxJchCfVerify']);
            } else {
                add_action('admin_menu', [$this->admin, 'addAdminMenu']);
                add_action('admin_menu', [$this->admin, 'addPageCacheMenu']);
                add_action('admin_init', [$this->admin, 'registerOptions']);
                add_filter('plugin_action_links', [$this->admin, 'loadActionLinks'], 10, 2);
                $this->installer->updateSettings();
                $this->installer->fixMetaFileSecurity();
            }
        } else {
            $url_exclude = (array)$this->params->get('menuexcludedurl', []);
            /** @var Input $input */
            $input = $this->container->get(Input::class);
            $jch_backend = (string)$input->get('jchbackend');
            /** @var string|null $nooptimize */
            $nooptimize = $input->get('jchnooptimize');

            if (
                defined('WP_USE_THEMES')
                && WP_USE_THEMES
                && $jch_backend != '1'
                && is_null($nooptimize)
                && version_compare(PHP_VERSION, '7.4.0', '>=')
                && !defined('DOING_AJAX')
                && !defined('DOING_CRON')
                && !defined('APP_REQUEST')
                && !defined('XMLRPC_REQUEST')
                && (!defined('SHORTINIT') || (defined('SHORTINIT') && !SHORTINIT))
                && !Helper::findExcludes($url_exclude, SystemUri::toString())
                && $input->server->getString('HTTP_SEC_FETCH_DEST') != 'iframe'
            ) {
                //Disable NextGen Resource Manager; incompatible with plugin
                //add_filter( 'run_ngg_resource_manager', '__return_false' );
                add_action('init', [$this, 'initializeCache'], 0);

                ob_start([$this, 'runOptimize']);

                if (JCH_DEBUG && !$this->params->get('disable_logged_in_users', '1')) {
                    add_action('admin_bar_menu', [$this, 'addMenuToAdminBar'], 101);
                }
            }
        }

        add_action('plugins_loaded', [$this, 'loadPluginTextDomain']);
        //Function register_uninstall_hook can only be used with a static class method
        register_uninstall_hook(JCH_PLUGIN_FILE, [__CLASS__, 'runUninstallRoutines']);

        if ($this->params->get('order_plugin', '1')) {
            add_action('activated_plugin', [$this, 'orderPlugin']);
            add_action('deactivated_plugin', [$this, 'orderPlugin']);
        }

        if (JCH_PRO) {
            $this->loadProUpdater();

            if ($this->params->get('pro_cache_platform', '0')) {
                add_filter('jch_optimize_get_page_cache_id', [$this, 'getPageCacheHash'], 10, 2);
            }

            $reCacheModel = $this->getContainer()->get(ReCache::class);
            /** @see ReCache::reCache() */
            add_action(ReCache::RECACHE_CRON_HOOK, [$reCacheModel, 'reCache']);
            add_action('update_option_jch-optimize_settings', [$this, 'respondToOptionUpdates']);
        }
    }

    public function runActivationRoutines(): void
    {
        //Handles activation routines
        register_activation_hook(JCH_PLUGIN_FILE, [$this->installer, 'activate']);

        $mu_folder = ABSPATH . 'wp-content/mu-plugins';

        if (defined('WPMU_PLUGIN_DIR') && WPMU_PLUGIN_DIR) {
            $mu_folder = WPMU_PLUGIN_DIR;
        }

        if (
            !file_exists(JCH_PLUGIN_DIR . 'dir.php')
            || (JCH_PRO && is_admin()
                && !file_exists($mu_folder . '/jch-optimize-mode-switcher.php'))
        ) {
            $this->installer->activate();
        }
    }

    public function respondToOptionUpdates($old): void
    {
        $new = get_option('jch-optimize_settings');
        $container = $this->getContainer();

        if (JCH_PRO) {
            if ($this->params->get('recache_frequency') != '0') {
                /** @see ReCache::reSchedule() */
                $container->get(ReCache::class)->reSchedule();
            }

            $pageCacheSettings = [
                'cache_enable',
                Settings::CACHE_PLATFORM,
                Settings::CAPTURE_CACHE_ENABLE,
                Settings::PAGE_CACHE_BROWSER_CACHING,
                Settings::PAGE_CACHE_LIFETIME
            ];

            $updateHtaccess = false;

            foreach ($pageCacheSettings as $pageCacheSetting) {
                if ($old[$pageCacheSetting] != $new[$pageCacheSetting]) {
                    $this->params->set($pageCacheSetting, $new[$pageCacheSetting]);
                    $updateHtaccess = true;
                }
            }

            if ($updateHtaccess) {
                $container->get(CaptureCache::class)->updateHtaccess();
            }
        }
    }

    protected function loadProUpdater(): void
    {
        $this->updater->load();
    }

    /**
     * @throws ExceptionInterface
     */
    public function initializeCache(): void
    {
        $this->pageCache->initialize();
        $this->pageCache->outputPageCache();
    }

    public function runOptimize(string $html): string
    {
        if (!Helper::validateHtml($html)) {
            return $html;
        }

        try {
            $this->pageCache->initialize();

            $disableBrowserCaching = $this->pageCache->shouldDisableBrowserCaching();

            if ($disableBrowserCaching) {
                $this->setNoCacheHeaders();
            }

            $disableOptimizing = apply_filters('jch_optimize_no_optimize', false);
            $disableLoggedInUsers = (bool)$this->params->get('disable_logged_in_users', '1');

            //Need to call Utility::isGuest after init has been called
            if ($disableOptimizing || ($disableLoggedInUsers && !$this->utility->isGuest())) {
                return $html;
            }

            gc_collect_cycles();
            $container = ContainerFactory::create();
            $optimize = $container->get(Optimize::class);

            if (!$disableBrowserCaching && $this->pageCache->getCachingEnabled()) {
                if ($this->params->isEnabled(Settings::PAGE_CACHE_BROWSER_CACHING)) {
                    $this->setBrowserCachingHeaders();
                } else {
                    $this->setNoCacheHeaders();
                }
            }

            $optimizedHtml = $optimize->process($html);

            //required for compatibility with Hide My WP Ghost
            /** @see https://wordpress.org/support/topic/compatibility-with-hide-my-wp-ghost/ */
            /** @var string $optimizedHtml */
            $optimizedHtml = apply_filters('jch_optimize_save_content', $optimizedHtml);
            do_action('jch_optimize_send_headers');

            if (http_response_code() === 200) {
                $this->pageCache->store($optimizedHtml);
            }
        } catch (Exception $e) {
            $this->logger->log(LogLevel::ERROR, (string)$e);

            $optimizedHtml = $html;
        }

        return $optimizedHtml;
    }

    private function setBrowserCachingHeaders(): void
    {
        $lifetime = max(0, (int)$this->params->get(Settings::PAGE_CACHE_LIFETIME, '900'));
        header('Cache-Control: public, max-age=' . $lifetime, true);
        header('Expires: ' . gmdate('D, d M Y H:i:s', time() + $lifetime) . ' GMT', true);
    }

    private function setNoCacheHeaders(): void
    {
        header('Cache-Control: no-store, no-cache, must-revalidate, max-age=0', true);
        header('Pragma: no-cache', true);
        header('Expires: 0', true);
    }

    public function loadPluginTextDomain(): void
    {
        load_plugin_textdomain('jch-optimize', false, dirname(plugin_basename(JCH_PLUGIN_FILE)) . '/languages');
    }

    public function orderPlugin(): bool
    {
        $active_plugins = (array)get_option('active_plugins', []);
        $order = [
            'jch-optimize/jch-optimize.php',
        ];

        //Get the plugins in $order that are currently activated
        $order_short_list = array_intersect($order, $active_plugins);
        //Remove plugins in $order_short_list from list of activated plugins
        $active_plugins_slist = array_diff($active_plugins, $order_short_list);
        //Merge $order with $active_plugins_list
        $ordered_active_plugins = array_merge($order_short_list, $active_plugins_slist);

        update_option('active_plugins', $ordered_active_plugins);

        return true;
    }

    public function getPageCacheHash(array $parts): array
    {
        if (wp_is_mobile()) {
            $parts[] = '_MOBILE_';
        }

        return $parts;
    }

    public function addMenuToAdminBar(WP_Admin_Bar $admin_bar): void
    {
        if (!current_user_can('manage_options')) {
            return;
        }

        $nodes = $admin_bar->get_nodes();

        if (!isset($nodes['jch-optimize-parent'])) {
            $aArgs = [
                'id'    => 'jch-optimize-parent',
                'title' => __('JCH Optimize', 'jch-optimize')
            ];

            $admin_bar->add_node($aArgs);
        }

        $aArgs = [
            'parent' => 'jch-optimize-parent',
            'id'     => 'jch-optimize-profiler',
            'title'  => __('Profiler', 'jch-optimize'),
        ];

        $admin_bar->add_node($aArgs);
    }
}