<?php

namespace App\Commands;

use Illuminate\Console\Scheduling\Schedule;
use LaravelZero\Framework\Commands\Command;
use Illuminate\Support\Facades\File;
use Jenssegers\Blade\Blade;

use App\Facades\Install;
use App\Facades\NginxVhost;
use App\Facades\NginxVhostFactory;
use App\Facades\TerminalHelper;

use PhpSchool\CliMenu\Builder\CliMenuBuilder;
use PhpSchool\CliMenu\CliMenu;
use PhpSchool\CliMenu\MenuItem\CheckboxItem;
use PhpSchool\CliMenu\Style\SelectableStyle;
use PhpSchool\CliMenu\MenuItem\MenuMenuItem;

use Respect\Validation\Validator as v;
use Respect\Validation\Exceptions\NestedValidationException;

use Log;
use Closure;

/**
 *  Add and Edit Configurations of Vhosts from Nginx
 *
 *  Using php-school/cli-menu
 *
 *
 *
 */
class NginxVhostsCommand extends Command
{
    // path templates
    const TEMPLATES_DIR = '/resources/nginx/templates';

    // index for vhosts
    const VHOST_INDEX = 0;

    /**
     * The signature of the command.
     *
     * @var string
     */
    protected $signature = 'nginx:vhosts';

    /**
     * The description of the command.
     *
     * @var string
     */
    protected $description = 'Create and Manage Nginx Vhosts';

    /**
     *
     *  @param  string $prefix [description]
     *  @return [type]         [description]
     */
    private function getTemplates($prefix = '')
    {
        // templates
        $templates = [];

        // getting templates
        $files = scandir(base_path().self::TEMPLATES_DIR);

        foreach($files as $file) {

            // create filepath
            $filepath = base_path().self::TEMPLATES_DIR.'/'.$file;

            // getting info
            $pathinfo = pathinfo($filepath);

            // if extension isset and php
            if (isset($pathinfo['extension']) && $pathinfo['extension'] === 'php') {

                $name = str_replace('.blade.php', '', $file);

                $templates[] = [
                    'name' => $name,
                    'file' => $file,
                    'filepath' => $filepath
                ];
            }
        }

        return $templates;
    }

    /**
     *
     *
     *
     */
    private function selectTemplate()
    {
        // getting templates
        $templates = $this->getTemplates();

        $menu = function(CliMenuBuilder $builder) use ($templates)
        {
            // writing configuration
            $blade = new Blade(base_path().self::TEMPLATES_DIR, base_path().'/storage/cache');

            $builder
                ->setTitle('Nginx > Add')
                ->setGoBackButtonText('Back');

            foreach($templates as $template) {
                $submenuCallable = $this->createConfiguration($template, $blade);
                $builder
                    ->addSubMenu($template['name'], $submenuCallable);
            }

            $builder->addLineBreak('-');
        };

        return $menu;
    }

    /**
     *  create Configuration, add for each template a submenu
     *
     *
     *  @param  array $template
     *  @param  Blade $blade
     *  @return CliMenuBuilder
     */
    private function createConfiguration($template, $blade)
    {
        $self = $this;

        $menu = function(CliMenuBuilder $builder) use ($template, $blade, $self)
        {
            $configuration = [
                'domain' => '',
                'root' => '',
                'index' => 'index.php',
                'ssl' => true,
                'redirect_www' => true
            ];

            // create checkbox for ssl
            $checkboxSSL = new CheckboxItem('ssl', function(CliMenu $menu) use (&$configuration) {
                $configuration['ssl'] = $menu->getSelectedItem()->getChecked();
            });

            $checkboxSSL->setChecked($configuration['ssl']);

            // create checkbox for redirect from www
            $checkboxRedirect = new CheckboxItem('redirect www', function(CliMenu $menu) use (&$configuration) {
                $configuration['redirect_www'] = $menu->getSelectedItem()->getChecked();
            });

            $checkboxRedirect->setChecked($configuration['redirect_www']);

            $builder
                ->setTitle('Nginx > Add > '.$template['name'])
                ->setGoBackButtonText('Cancel')

                // input domain
                ->addItem('domain: -', function(CliMenu $menu) use (&$configuration) {
                    $result = $menu->askText()->ask();
                    $configuration['domain'] = $result->fetch();

                    $menu->getSelectedItem()->setText('domain: '.$result->fetch());
                    $menu->redraw();
                })

                // input root
                ->addItem('root: -', function(CliMenu $menu) use (&$configuration) {
                    $result = $menu->askText()->ask();
                    $configuration['root'] = $result->fetch();

                    $menu->getSelectedItem()->setText('root: '.$result->fetch());
                    $menu->redraw();
                })

                // input index
                ->addItem('index: '.$configuration['index'], function(CliMenu $menu) use (&$configuration) {
                    $result = $menu->askText()->ask();
                    $configuration['index'] = $result->fetch();

                    $menu->getSelectedItem()->setText('index: '.$result->fetch());
                    $menu->redraw();
                })
                ->addLineBreak('-')

                // options
                ->addMenuItem($checkboxSSL)
                ->addMenuItem($checkboxRedirect)
                ->addLineBreak('-')

                // create
                ->addItem('Create', function(CliMenu $menu) use (&$configuration, $template, $blade, $self) {

                    $data = $configuration;

                    // add directory for validator to check if file exits
                    $data['index'] = $data['root'].'/'.$data['index'];

                    $validator = v::key('domain', v::domain())
                        ->key('root', v::directory())
                        ->key('index', v::file());

                    try {
                        $validator->assert($data);
                    } catch(NestedValidationException $exception) {
                        $errors = $exception->getMessages();
                    }

                    if (isset($errors)) {
                        TerminalHelper::confirmArray($menu, $errors);
                    } else {

                        // render configuration
                        $content = $blade->render($template['name'], $configuration);

                        // create filename
                        $filename = $configuration['domain'].'.conf';

                        // write configuration to file
                        file_put_contents('/etc/nginx/sites-available/'.$filename, $content);

                        $menu->confirm('Success!')->display('Ok!');

                        // prepare for close current submenu and open mainmenu
                        $parent = $menu->getParent();
                        $menu->closeThis();

                        $mainmenu = $parent->getParent();

                        $mainmenu = NginxVhostFactory::addVhosts($mainmenu, NginxVhost::find(), self::VHOST_INDEX);
                        $mainmenu->open();
                    }
                })
                ->addLineBreak('-');
        };

        return $menu;
    }

    /**
     *  let it rain
     *
     *
     */
    public function handle()
    {
        $submenuSelectTemplate = $this->selectTemplate();

        // create menu
        $mainmenu = $this->menu('Nginx')

            // add Submenu for select templates
            ->addLineBreak('-')
            ->addSubMenu('Add', $submenuSelectTemplate);

        $mainmenu->addLineBreak('-');

        // apperance
        $mainmenu->setWidth($mainmenu->getTerminal()->getWidth());
        $mainmenu->setBorderLeftWidth(4);
        $mainmenu->setBorderColour('magenta');
        $mainmenu->setMargin(2);

        $mainmenu = $mainmenu->build();

        // remove first item
        $items = $mainmenu->getItems();
        unset($items[0]);
        $mainmenu->setItems($items);

        // adding current vhosts
        $mainmenu = NginxVhostFactory::addVhosts($mainmenu, NginxVhost::find(), self::VHOST_INDEX);

        $mainmenu->open();
    }
}