<?php

namespace Tekod\ADWMAN\Dashboard;

/**
 * Class for manipulating collection of widgets.
 */
class Widgets
{

    protected static $widgets = [];

    protected static $registeredWidgets = [];

    protected static $nativeWordPressWidgets = [
        'dashboard_welcome_panel',
        'dashboard_right_now',
        'dashboard_activity',
        'dashboard_quick_press',
        'dashboard_primary',
        'dashboard_secondary',
        'dashboard_site_health',
        'dashboard_recent_comments',
        'dashboard_recent_drafts',
        'dashboard_incoming_links',
        'dashboard_plugins',
        'dashboard_browser_nag',
    ];

    /**
     * Return list of all widgets.
     *
     * @return array
     */
    public static function getAllWidgets(): array
    {
        if (empty(self::$widgets)) {
            $list = [];
            foreach (self::collectAllWidgets() as $class) {
                $id = $class::getId();
                $list[$id] = [
                    'id' => $id,
                    'title' => $class::getName(),
                    'callback' => [$class, 'renderCallback'],
                    'args' => null,
                    'context' => 'normal',
                    'priority' => 'low',
                    'group' => $class::getGroup(),
                ];
            }
            self::$widgets = $list + self::getOtherWidgets();
        }
        return self::$widgets;
    }


    /**
     * Retrieve list of all widgets (except native WordPress widgets).
     *
     * @return array
     */
    protected static function collectAllWidgets(): array
    {
        $widgets = [
            \Tekod\ADWMAN\Widgets\General\PostsInDraft::class,
            \Tekod\ADWMAN\Widgets\General\ErrorLog::class,
            \Tekod\ADWMAN\Widgets\General\HostingInfo::class,
            \Tekod\ADWMAN\Widgets\Users\CommentsForApprovement::class,
            \Tekod\ADWMAN\Widgets\Users\UserLatest::class,
            \Tekod\ADWMAN\Widgets\WooCommerce\WcOrdersInProcessing::class,
            \Tekod\ADWMAN\Widgets\WooCommerce\WcOrdersOnHold::class,
            \Tekod\ADWMAN\Widgets\WooCommerce\WcProductsOutOfStock::class,
            \Tekod\ADWMAN\Widgets\WooCommerce\WcProductsLowInStock::class,
            \Tekod\ADWMAN\Widgets\WooCommerce\WcProductsInDraft::class,
        ];
        $widgets = array_merge($widgets, self::$registeredWidgets);
        return apply_filters('tekod-adwman-collect-widgets', $widgets);  // theme can add additional widgets here
    }


    /**
     * Register new custom widget.
     *
     * @param string $class
     */
    public static function registerWidget(string $class): void
    {
        self::$registeredWidgets[] = $class;
    }


    /**
     * Retrieve list of built-in WordPress widgets.
     *
     * @return array
     */
    protected static function getOtherWidgets(): array
    {
        global $wp_meta_boxes;

        // if not happen, emulate dashboard page opening
        if ($wp_meta_boxes === null) {
            self::emulateDashboardOpeningPage();
        }

        // enumerate widgets
        $list = [];
        foreach ($wp_meta_boxes['dashboard'] ?? [] as $context) {
            foreach ($context as $widgets) {
                foreach ($widgets as $widget) {
                    $group = in_array($widget['id'], self::$nativeWordPressWidgets, true) ? 'WordPress built-in widgets' : 'Other plugins';
                    $list[$widget['id']] = ['title' => wp_strip_all_tags($widget['title']), 'group' => $group] + $widget;
                }
            }
        }
        return $list;
    }


    protected static function emulateDashboardOpeningPage(): void
    {
        // emulate dashboard page opening
        $backup = get_current_screen();
        set_current_screen('dashboard');
        require_once(ABSPATH . 'wp-admin/includes/dashboard.php');
        if (function_exists('wpseo_admin_init') && !isset($GLOBALS['wpseo_admin'])) {
            wpseo_admin_init();
        }

        if (class_exists('AIOSEO\Plugin\AIOSEO')) {
            $AIOSEO = \AIOSEO\Plugin\AIOSEO::instance();
            if (!$AIOSEO->dashboard) {
                $AIOSEO->dashboard = $AIOSEO->pro ? new \AIOSEO\Plugin\Pro\Admin\Dashboard() : new \AIOSEO\Plugin\Common\Admin\Dashboard();
                $AIOSEO->help = new \AIOSEO\Plugin\Common\Help\Help();
            }
        }

        do_action('admin_enqueue_scripts');
        do_action('admin_init');
        wp_dashboard_setup();
        $GLOBALS['current_screen'] = $backup;
    }

}