<?php

namespace App\Menus\Nginx;

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 PhpSchool\CliMenu\MenuItem\StaticItem;

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

use App\Menus\ItemValidator;

use App\BladeFile;
use App\Helpers\NginxTemplateHelper;

use App\Facades\TerminalHelper;

/**
 *
 *
 *  @author Björn Hase, Tentakelfabrik
 *  @license http://opensource.org/licenses/MIT The MIT License
 *  @link https://gitea.tentakelfabrik.de/Tentakelfabrik/mcp
 *
 */
class TemplateMenuFactory
{
    // path templates
    const TEMPLATES_DIR = '/resources/nginx/templates';

    /**
     *  add item to select template
     *
     *
     *  @return PhpSchool\CliMenu\Builder\CliMenu
     *
     */
    public function addSelectTemplateItem()
    {
        $menu = function(CliMenuBuilder $builder)
        {
            // create blade
            $bladeFile = new BladeFile(self::TEMPLATES_DIR);

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

            $nginxTemplateHelper = new NginxTemplateHelper();

            // get templates
            foreach($nginxTemplateHelper->find() as $template) {
                $submenuCallable = $this->addCreateItem($template, $bladeFile);
                $builder
                    ->addSubMenu($template['name'], $submenuCallable);
            }

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

        return $menu;
    }

    /**
     *  default configuration
     *
     *  @TODO will be removed after
     *
     *  @return array
     */
    private function getConfiguration()
    {
        return [
            'domain' => '',
            'root' => '',
            'index' => 'index.php',
            'ssl' => true,
            'redirect_www' => true
        ];
    }

    /**
     *  add input item
     *
     *  @param string $key
     *  @param string $label
     *  @param array $configuration
     */
    private function addInputItem($key, $label, &$configuration, $itemValidator = NULL)
    {
        $callable = function(CliMenu $menu) use ($key, $label, &$configuration, $itemValidator)
        {
            $input = $menu->askText();

            if ($configuration[$key]) {
                $input->setPlaceholderText($configuration[$key]);
            }

            $result = $input->ask();
            $configuration[$key] = $result->fetch();

            $menu->getSelectedItem()->setText($label.': '.$result->fetch());

            if ($itemValidator) {
                $itemValidator->validate($menu, $menu->getSelectedItem(), [ $key => $result->fetch() ]);
            }

            $menu->redraw();
        };

        return $callable;
    }

    /**
     *  add item to publish configuration
     *
     *  @param string $template
     *  @param object $bladeFile
     *  @param array $configuration
     */
    private function addPublishItem($template, $bladeFile, &$configuration)
    {
        $callable = function(CliMenu $menu) use ($template, $bladeFile, &$configuration)
        {
            // getting configuration
            $data = $configuration;

            $validator = v::key('domain', v::domain(false))
                ->key('root', v::notEmpty())
                ->key('index', v::notEmpty())
                ->key('phpFpm', v::notEmpty());

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

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

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

                // write configuration to file
                $bladeFile->put($template['name'], '/etc/nginx/sites-available/'.$filename, $configuration);
                $menu->confirm('Success!')->display('Ok!');

                // invoke action
                $action = new NginxVhostGoBackAction();
                is_callable($action($menu));
            }
        };

        return $callable;
    }

    /**
     *  adding radio buttons to select php-fpm version
     *
     *
     *  @param CliMenuBuilder $builder
     *  @param array $configuration
     */
    private function addPhpFpmItems($builder, &$configuration)
    {
        // get php-fpm services
        exec('find /lib/systemd/system/ -name "php[0-9\.]*-fpm.service"', $files);

        foreach($files as $index => $file) {

            // remove path
            $file = str_replace('/lib/systemd/system/', '', $file);

            // remove extension
            $file = str_replace('.service', '', $file);

            $builder->addRadioItem($file, function(CliMenu $menu) use (&$configuration) {
                $configuration['phpFpm'] = $menu->getSelectedItem()->getText();
            });
        }

        return $builder;
    }

    /**
     *  add create item
     *
     *
     *  @param  array $template
     *  @param  Blade $blade
     *  @return CliMenuBuilder
     */
    private function addCreateItem($template, $bladeFile)
    {
        $menu = function(CliMenuBuilder $builder) use ($template, $bladeFile)
        {
            $configuration = $this->getConfiguration();

            // 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']);

            $validator = v::key('root', v::directory());
            $itemValidator = new ItemValidator($validator);

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

                // input domain
                ->addItem('domain: -', $this->addInputItem('domain', 'domain', $configuration))

                // input root
                ->addItem('root: -', $this->addInputItem('root', 'root', $configuration, $itemValidator))

                // input index
                ->addItem('index: '.$configuration['index'], $this->addInputItem('index', 'index', $configuration))
                ->addLineBreak('-');

            // add php-fpm items
            $builder = $this->addPhpFpmItems($builder, $configuration);

            $builder
                ->addLineBreak('-')

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

                // create
                ->addItem('publish', $this->addPublishItem($template, $bladeFile, $configuration))
                ->addLineBreak('-');
        };

        return $menu;
    }
}