<?php

namespace App\Factories;

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

class NginxVhostFactory
{
    /**
     *  adding Vhosts behind index
     *
     *  @param [type] $mainmenu
     *  @param [type] $vhosts
     *  @param [type] $vhostIndex
     */
    public function addVhosts($mainmenu, $vhosts, $insertAfterIndex)
    {
        // get items
        $items = $mainmenu->getItems();

        // new items
        $newItems = [];

        // lastIndex
        $insertUntilIndex = 0;

        // get all items before
        foreach($items as $index => $item) {
            if ($index < $insertAfterIndex) {
                $newItems[] = $item;
            } else {
                break;
            }
        }

        // check for linebreak-object
        foreach($items as $index => $item) {
            if ($index >= $insertAfterIndex && get_class($item) === 'PhpSchool\CliMenu\MenuItem\LineBreakItem') {
                $insertUntilIndex = $index;
                break;
            }
        }

        // add submenu for each vhost
        foreach($vhosts as $vhost) {
            $newItems[] = self::createVhostSubmenu($vhost, $mainmenu);
        }

        // fillup last items from mainmenu
        foreach($items as $index => $item) {
            if ($index >= $insertUntilIndex) {
                $newItems[] = $item;
            }
        }

        $mainmenu->setItems($newItems);

        return $mainmenu;
    }

    /**
     *
     *
     *  @param  [type] $vhost
     *  @param  [type] $mainmenu
     *  @return [type]
     */
    private function createVhostSubmenu($vhost, $mainmenu)
    {
        $builder = CliMenuBuilder::newSubMenu($mainmenu->getTerminal());

        // create checkbox for disable / enabled
        $checkbox = self::createVhostCheckbox($vhost);

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

        $builder
            ->setTitle('Nginx > '.$vhost['domain'])
            ->setGoBackButtonText('Back')

            // edit configuration
            ->addItem('edit', function(CliMenu $menu) use ($vhost) {
                system('nano /etc/nginx/sites-available/'.$vhost['file'].' > `tty`');
            })

            // delete configuration
            ->addItem('delete', function(CliMenu $menu) use ($vhost) {

                if ($vhost['enabled'] === true) {
                    $menu->flash('Please disable first!')->display();
                } else {

                    // input domain for confirmation
                    $result = $menu->askText()
                        ->setPromptText('Enter the domain name as confirmation: '.$vhost['domain'].' / [ESC] for Cancel')
                        ->ask();

                    // if result matching delete vhost an close menu
                    if ($result->fetch() === $vhost['domain']) {
                        unlink('/etc/nginx/sites-available/'.$vhost['file']);
                        $menu->confirm($vhost['domain'].' is deleted!')->display('OK!');

                        // get
                        $parent = $menu->getParent();
                        $menu->closeThis();

                        // remove current vhost from mainmenu
                        $parent->removeItem($parent->getSelectedItem());
                        $parent->open();

                    // cancel input
                    } else if (empty($result->fetch())) {
                        $menu->flash('Cancel')->display();

                    // if domain not matching
                    } else {
                        $menu->flash('Not matching! Domain not deleted!')->display();
                    }

                }

            })
            ->addLineBreak('-')
            ->addMenuItem($checkbox)
            ->addLineBreak('-');

        $submenu = $builder->build();

        $submenu->setParent($mainmenu);
        $submenu->setStyle($mainmenu->getStyle());

        // create MenuMenuItem
        $item = new MenuMenuItem(
            $vhost['domain'],
            $submenu,
            $builder->isMenuDisabled()
        );

        $item->getStyle()->setSelectedMarker("\xF0\x9D\x8C\xA1 ")->setUnselectedMarker('  ');

        // show item extra if domain is enabled
        $item->getStyle()->setItemExtra('[ enabled ]');
        if ($vhost['enabled']) {
            $item->showItemExtra();
        }

        return $item;
    }

    /**
     *
     *  @param  [type] $vhost
     *  @return [type]
     */
    private function createVhostCheckbox($vhost)
    {
        // create checkbox for enabled / disabled
        $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']);
                exec('nginx -c /etc/nginx/nginx.conf -t 2>&1', $output);

                if ($output) {
                    unlink('/etc/nginx/sites-enabled/'.$vhost['file']);
                    $menu->confirm('Error! Configuration not Working!')->display('OK!');

                    // @TODO: find a way to show logs, https://gitea.tentakelfabrik.de/Tentakelfabrik/mcp/issues/15
                    // implode(PHP_EOL, $output);

                    $vhost['enabled'] = false;
                    $status = 'disabled';
                } else {

                    // restart
                    exec('service nginx restart');
                    $menu->confirm('Success! ')->display('OK!');

                    $vhost['enabled'] = true;
                    $status = 'enabled';

                }
            } else {
                unlink('/etc/nginx/sites-enabled/'.$vhost['file']);

                $vhost['enabled'] = false;
                $status = 'disabled';
            }

            if ($vhost['enabled']) {
                $menu->getSelectedItem()->setChecked();
            } else {
                $menu->getSelectedItem()->setUnchecked();
            }

            $menu->redraw();

        });

        return $checkbox;
    }
}