<?php

namespace AOP\App\Options;

use AOP\App\Data;
use AOP\App\Singleton;
use AOP\App\Validation;
use AOP\App\Admin\Input;
use AOP\App\Database\PageRepository;
use Illuminate\Support\Collection;

class OptionsPages
{
    use Singleton;

    /**
     * @return void
     */
    private function __construct()
    {
        if (!PageRepository::tableExists()) {
            return;
        }

        $this->postRequestCustomMenu();
        $this->postRequestExistingMenu();

        return $this->getAllOptionsPagesAndFields();
    }

    /**
     * @return mixed
     */
    public function getAllOptionsPagesAndFields()
    {
        $data = Data::getAllFromPageValueColumn();
        $postRequest = Data::getPostRequest();

        if (isset($postRequest['menu_id'])) {
            $data = $data->whereNotIn('menu_id', [$postRequest['menu_id']]);
        }

        return $data->map(function ($item) {
            if (isset($item['menu'])) {
                (new MenuPage())->run($item['menu']);
            }

            return $item['pages'];
        })->flatten(1)->filter(function ($page) {
            (new SingleOptionsPage())->run($page);

            $requestUri = isset($_SERVER['REQUEST_URI']) ? sanitize_text_field( wp_unslash($_SERVER['REQUEST_URI']) ) : '';

            $cleanSlug = strtok($requestUri, '?');
            $prefix = wp_parse_url(site_url(), PHP_URL_PATH) !== null ? wp_parse_url(site_url(), PHP_URL_PATH) : '';

            $getRequest = Data::getRequest();

            if (!isset($getRequest['page']) && $cleanSlug !== $prefix . '/wp-admin/options.php') {
                return null;
            }

            if (!isset($getRequest['page']) && !isset($getRequest['option_page'])) {
                return null;
            }

            return $getRequest['page'] === $page['menu_slug'] || $cleanSlug === $prefix . '/wp-admin/options.php';
        })->map(function ($page) {
            return (new OptionsFields())->run($page['fields'], $page);
        });
    }

    /**
     * @return Collection|void
     */
    public function postRequestCustomMenu()
    {
        $postRequest = Data::getPostRequest();

        if (!isset($postRequest['menu']) || !isset($postRequest['pages'])) {
            return;
        }

        $validate = new Validation();

        if (!$validate->customMenu()) {
            return;
        }

        (new MenuPage())->run((new Input())->menuPageForCustomMenu($validate));

        return Collection::make($postRequest['pages'])->map(function ($subpage, $key) use ($validate, $postRequest) {
            $validatedSubpageTab = isset($subpage['subpage_tab']) && $subpage['subpage_tab'] === '1';

            $validatedParentSlug = $validate->alphanumericDashesAll($postRequest['pages'][0]['subpage_slug']);
            $validatedMenuSlug = ($key === 0) ? $validatedParentSlug : $validate->alphanumericDashesAll($subpage['subpage_slug']);

            (new SingleOptionsPage())->run([
                'parent_slug' => $validatedParentSlug,
                'menu_title' => $validate->textField($subpage['menu_title']),
                'capability' => $validate->capabilityPage($subpage['role']),
                'menu_slug' => $validatedMenuSlug,
                'include_tab' => $validatedSubpageTab,
                'select_title' => $validate->textField($subpage['select_title']),
                'subpage_position' => $validate->integerOrEmpty($subpage['subpage_position'])
            ]);
        });
    }

    /**
     * @return Collection|void
     */
    public function postRequestExistingMenu()
    {
        $postRequest = Data::getPostRequest();

        if (!isset($postRequest['existing_menu']) || !isset($postRequest['pages'])) {
            return;
        }

        $validate = new Validation();

        return Collection::make($postRequest['pages'])->map(function ($subpage, $key) use ($validate, $postRequest) {
            $validatedSubpageTab = isset($subpage['subpage_tab']) && $subpage['subpage_tab'] === '1';

            $validatedParentSlug = $postRequest['existing_menu']['menu_slug'];

            (new SingleOptionsPage())->run([
                'parent_slug' => $validatedParentSlug,
                'menu_title' => $validate->textField($subpage['menu_title']),
                'capability' => $validate->capabilityPage($subpage['role']),
                'menu_slug' => $validate->alphanumericDashesAll($subpage['subpage_slug']),
                'include_tab' => $validatedSubpageTab,
                'select_title' => $validate->textField($subpage['select_title']),
                'subpage_position' => $validate->integerOrEmpty($subpage['subpage_position'])
            ]);
        });
    }
}