<?php

if (!defined('ABSPATH')) {
    die('You are not allowed to call this page directly.');
}

class MeprCoursesCtrl extends MeprBaseCtrl
{
    /**
     * The courses slug
     *
     * @var string
     */
    private $courses_slug = 'memberpress-courses/main.php';

    /**
     * Load hooks.
     *
     * @return void
     */
    public function load_hooks()
    {
        add_action('plugins_loaded', function () {
            if (!MeprUtils::is_addon_active(MeprUtils::ADDON_COURSES)) {
                add_action('admin_enqueue_scripts', [$this, 'enqueue_scripts']);
                add_action('wp_ajax_mepr_courses_action', [$this, 'ajax_courses_action']);
                add_action('mepr_display_options_tabs', [$this, 'courses_tab'], 99);
                add_action('mepr_display_options', [$this, 'courses_tab_content']);
            }
        });
    }

    /**
     * Render the courses UI page.
     *
     * @return void
     */
    public static function route()
    {
        $plugins = get_plugins();
        MeprView::render('/admin/courses/ui', get_defined_vars());
    }

    /**
     * Enqueue scripts.
     *
     * @param  string $hook The hook.
     * @return void
     */
    public function enqueue_scripts($hook)
    {
        if (preg_match('/_page_memberpress-(courses|options)$/', $hook)) {
            wp_enqueue_style('mepr-sister-plugin-css', MEPR_CSS_URL . '/admin-sister-plugin.css', [], MEPR_VERSION);
        }
    }

    /**
     * Adds the "Courses" tab to the MemberPress settings page.
     *
     * @return void
     */
    public function courses_tab()
    {
        ?>
      <a class="nav-tab" id="courses" href="#"><?php esc_html_e('Courses', 'memberpress'); ?></a>
        <?php
    }

    /**
     * Renders the "Courses" tab content.
     *
     * @return void
     */
    public function courses_tab_content()
    {
        ?>
    <div id="courses" class="mepr-options-hidden-pane">
        <?php MeprView::render('/admin/courses/ui', get_defined_vars()); ?>
    </div>
        <?php
    }

    /**
     * Handle actions for MemberPress Courses
     *
     * @return void
     */
    public function ajax_courses_action()
    {

        if (empty($_POST['nonce']) || ! wp_verify_nonce(sanitize_text_field(wp_unslash($_POST['nonce'])), 'mepr_courses_action')) {
            die();
        }

        if (! current_user_can('activate_plugins')) {
            wp_send_json_error(__('Sorry, you don\'t have permission to do this.', 'memberpress'));
        }

        $type      = sanitize_text_field(wp_unslash($_POST['type'] ?? ''));
        $installed = false;
        $activated = false;
        $message   = '';
        $result    = 'error';
        switch ($type) {
            case 'install-activate': // Install and activate courses.
                $installed = $this->install_courses(true);
                $activated = $installed ? $installed : $activated;
                $result    = $installed ? 'success' : 'error';
                $message   = $installed ? esc_html__('Courses has been installed and activated successfully. Enjoy!', 'memberpress') : esc_html__('Courses could not be installed. Please check your license settings, or contact MemberPress support for help.', 'memberpress');
                break;
            case 'activate': // Just activate (already installed).
                $activated = is_null(activate_plugin($this->courses_slug));
                $result    = 'success';
                $message   = esc_html__('Courses has been activated successfully. Enjoy!', 'memberpress');
                break;
            default:
                break;
        }

        delete_option('mepr_courses_flushed_rewrite_rules');

        $redirect = '';

        if ($activated) {
            $redirect = add_query_arg([
                'post_type'         => 'mpcs-course',
                'courses_activated' => 'true',
            ], admin_url('edit.php'));
        }

        wp_send_json_success([
            'installed' => $installed,
            'activated' => $activated,
            'result'    => $result,
            'message'   => $message,
            'redirect'  => $redirect,
        ]);
    }

    /**
     * Install the MemberPress Courses addon
     *
     * @param boolean $activate Whether to activate after installing.
     *
     * @return boolean Whether the plugin was installed
     */
    public function install_courses($activate = false)
    {

        $force         = isset($_GET['refresh']) && $_GET['refresh'] === 'true';
        $addons        = (array) MeprUpdateCtrl::addons(true, $force, true);
        $courses_addon = ! empty($addons['memberpress-courses']) ? $addons['memberpress-courses'] : [];
        $plugins       = get_plugins();
        wp_cache_delete('plugins', 'plugins');

        if (empty($courses_addon)) {
            return false;
        }

        // Set the current screen to avoid undefined notices.
        set_current_screen("memberpress_page_{$this->courses_slug}");

        // Prepare variables.
        $url = esc_url_raw(
            add_query_arg(
                [
                    'page' => $this->courses_slug,
                ],
                admin_url('admin.php')
            )
        );

        $creds = request_filesystem_credentials($url, '', false, false, null);

        // Check for file system permissions.
        if (false === $creds) {
            wp_send_json_error(esc_html('File system credentials failed.', 'memberpress'));
        }
        if (! WP_Filesystem($creds)) {
            wp_send_json_error(esc_html('File system credentials failed.', 'memberpress'));
        }

        // We do not need any extra credentials if we have gotten this far, so let's install the plugin.
        require_once ABSPATH . 'wp-admin/includes/class-wp-upgrader.php';

        // Do not allow WordPress to search/download translations, as this will break JS output.
        remove_action('upgrader_process_complete', ['Language_Pack_Upgrader', 'async_upgrade'], 20);

        // Create the plugin upgrader with our custom skin.
        $installer = new Plugin_Upgrader(new MeprAddonInstallSkin());

        $plugin = wp_unslash($courses_addon->url);
        $installer->install($plugin);

        // Flush the cache and return the newly installed plugin basename.
        wp_cache_flush();

        if ($installer->plugin_info() && true === $activate) {
            activate_plugin($installer->plugin_info());
        }

        return $installer->plugin_info();
    }
}