<?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 PhpSchool\CliMenu\Builder\CliMenuBuilder;
use PhpSchool\CliMenu\CliMenu;
use PhpSchool\CliMenu\MenuItem\CheckboxItem;
use PhpSchool\CliMenu\Style\SelectableStyle;

use Log;
use Closure;

class NginxVhostsCommand extends Command
{
    // path templates
    const TEMPLATES_DIR = '/resources/nginx/templates';

    /**
     * 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';

    /**
     *
     *
     *
     */
    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;
    }

    /**
     *
     *
     *  @param  [type] $template [description]
     *  @param  [type] $blade    [description]
     *  @return [type]           [description]
     */
    private function createConfiguration($template, $blade)
    {
        $menu = function(CliMenuBuilder $builder) use ($template, $blade)
        {
            $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']);

            $builder
                ->setTitle('Nginx Vhosts > add > '.$template['name'])
                ->addItem('domain', function(CliMenu $menu) use (&$configuration) {
                    $result = $menu->askText()->ask();
                    $configuration['domain'] = $result->fetch();

                    $menu->getSelectedItem()->setText('domain -> '.$result->fetch());
                    $menu->redraw();
                })
                ->addItem('root', function(CliMenu $menu) use (&$configuration) {
                    $result = $menu->askText()->ask();
                    $configuration['root'] = $result->fetch();

                    $menu->getSelectedItem()->setText('root -> '.$result->fetch());
                    $menu->redraw();
                })
                ->addItem($configuration['index'], function(CliMenu $menu) use (&$configuration) {
                    $result = $menu->askText()->ask();
                    $configuration['index'] = $result->fetch();

                    $menu->getSelectedItem()->setText($result->fetch());
                    $menu->redraw();
                })
                ->addLineBreak('-')
                ->addMenuItem($checkboxSSL)
                ->addMenuItem($checkboxRedirect)
                ->addLineBreak('-')
                ->addItem('save', function() use (&$configuration, $template, $blade) {
                    $content = $blade->render($template['name'], $configuration);
                    file_put_contents('/etc/nginx/sites-available/'.$configuration['domain'].'.conf', $content);
                })
                ->addLineBreak('-');
        };

        return $menu;
    }

    /**
     *  create submenu for vhost
     *
     *
     *  @param  array $vhost
     *  @return CliMenuBuilder
     *
     */
    private function vhost($vhost)
    {
        $menu = function(CliMenuBuilder $builder) use ($vhost)
        {
            $checkbox = new CheckboxItem('enabled', function(CliMenu $menu) use ($vhost) {

                // check status
                if ($menu->getSelectedItem()->getChecked()) {
                    symlink('/etc/nginx/sites-available/'.$vhost['file'], '/etc/nginx/sites-enabled/'.$vhost['file']);
                    $status = 'enabled';
                } else {
                    unlink('/etc/nginx/sites-enabled/'.$vhost['file']);
                    $status = 'disabled';
                }

                // restart
                exec('service nginx restart');
                exec('service nginx status', $output);

                if (strpos(implode(' ', $output), 'active') !== false) {
                    $menu->confirm($vhost['domain'].' is '.$status.'!')->display('OK!');
                } else {
                    $menu->confirm('Error! Something not working!')->display('OK!');
                }

            });

            // adding checkbox
            if ($vhost['enabled']) {
                $checkbox->setChecked(true);
            }

            $builder
                ->setTitle('Nginx > '.$vhost['domain'])
                ->setGoBackButtonText('Back')
                ->addItem('edit', function(CliMenu $menu) use ($vhost) {
                    system('nano /etc/nginx/sites-available/'.$vhost['file'].' > `tty`');
                })
                ->addItem('delete', function(CliMenu $menu) use ($vhost) {
                    if (file_exists('/etc/nginx/sites-enabled/'.$vhost['file'])) {
                        $menu->confirm('Error! Please disable '.$vhost['domain'].' first!')->display('OK!');
                    } else {
                        unlink('/etc/nginx/sites-available/'.$vhost['file']);
                        $menu->confirm($vhost['domain'].' is deleted!')->display('OK!');
                    }
                })
                ->addLineBreak('-')
                ->addMenuItem($checkbox)
                ->addLineBreak('-');
        };

        return $menu;
    }

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

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

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

        // getting vhosts
        $vhosts = NginxVhost::find();

        // add submenu for each vhost
        foreach($vhosts as $vhost) {
            $submenuEditVhost = $this->vhost($vhost);
            $main->addSubMenu($vhost['domain'], $submenuEditVhost);
        }

        $main->addLineBreak('-');
        $main->open();
    }
}