<?php

namespace App\Http\Controllers\Business;

use App\Utilities\SidebarPermissions;
use Illuminate\Routing\Controller;

class Pages extends Controller
{
    public function home()
    {
        $section = collect(SidebarPermissions::navigationFor(user()))->first();

        abort_if(empty($section), 403, '当前账号没有已授权的侧边栏功能。');

        $page = collect($section['pages'] ?? [])->first();
        $parameters = ['section' => $section['slug']];

        if ($page) {
            $parameters['page'] = $page['slug'];

            if (! empty($page['tabs'])) {
                $parameters['tab'] = $page['tabs'][0]['slug'];
            }
        }

        return redirect()->route('business.pages.show', $parameters);
    }

    public function show(string $section, ?string $page = null, ?string $tab = null)
    {
        $sectionConfig = collect(SidebarPermissions::navigationFor(user()))->firstWhere('slug', $section);

        abort_if(empty($sectionConfig), 403, '当前账号没有该页面权限。');

        $pages = collect($sectionConfig['pages'] ?? []);

        if ($pages->isEmpty()) {
            abort_if($page !== null || $tab !== null, 404);

            return view('business.pages.show', [
                'section' => $sectionConfig,
                'page' => null,
                'tabs' => collect(),
                'activeTab' => null,
            ]);
        }

        if ($page === null) {
            return $this->redirectToPage($sectionConfig, $pages->first());
        }

        $pageConfig = $pages->firstWhere('slug', $page);

        abort_if(empty($pageConfig), 404);

        $tabs = collect($pageConfig['tabs'] ?? []);

        if ($tabs->isEmpty()) {
            abort_if($tab !== null, 404);

            return view('business.pages.show', [
                'section' => $sectionConfig,
                'page' => $pageConfig,
                'tabs' => $tabs,
                'activeTab' => null,
            ]);
        }

        if ($tab === null) {
            return $this->redirectToPage($sectionConfig, $pageConfig);
        }

        $activeTab = $tabs->firstWhere('slug', $tab);

        abort_if(empty($activeTab), 404);

        return view('business.pages.show', [
            'section' => $sectionConfig,
            'page' => $pageConfig,
            'tabs' => $tabs,
            'activeTab' => $activeTab,
        ]);
    }

    protected function redirectToPage(array $section, array $page)
    {
        $parameters = [
            'section' => $section['slug'],
            'page' => $page['slug'],
        ];

        if (! empty($page['tabs'])) {
            $parameters['tab'] = $page['tabs'][0]['slug'];
        }

        return redirect()->route('business.pages.show', $parameters);
    }
}