<?php
/**
 * @package    Grav\Plugin\Login
 *
 * @copyright  Copyright (C) 2014 - 2017 RocketTheme, LLC. All rights reserved.
 * @license    MIT License; see LICENSE file for details.
 */
namespace Grav\Plugin\Console;

use Grav\Common\Config\Config;
use Grav\Console\ConsoleCommand;
use Grav\Common\Grav;
use Grav\Common\File\CompiledYamlFile;
use Grav\Common\User\User;
use Grav\Plugin\Login\Login;
use RocketTheme\Toolbox\ResourceLocator\UniformResourceLocator;
use Symfony\Component\Console\Input\InputOption;
use Symfony\Component\Console\Helper\Helper;
use Symfony\Component\Console\Question\Question;

/**
 * Class CleanCommand
 *
 * @package Grav\Console\Cli
 */
class ChangePasswordCommand extends ConsoleCommand
{
    /** @var array */
    protected $options = [];

    /** @var Login */
    protected $login;

    /**
     * Configure the command
     */
    protected function configure()
    {
        $this
            ->setName('change-password')
            ->setAliases(['edit-password', 'newpass', 'changepass', 'passwd'])
            ->addOption(
                'user',
                'u',
                InputOption::VALUE_REQUIRED,
                'The username'
            )
            ->addOption(
                'password',
                'p',
                InputOption::VALUE_REQUIRED,
                "The password. Note that this option is not recommended because the password will be visible by users listing the processes. You should also make sure the password respects Grav's password policy."
            )
            ->setDescription('Changes a User Password')
            ->setHelp('The <info>change-password</info> changes the password of the specified user. (User must exist)')
        ;
    }

    /**
     * @return int|null|void
     */
    protected function serve()
    {
        include __DIR__ . '/../vendor/autoload.php';

        $grav = Grav::instance();
        if (!isset($grav['login'])) {
            $grav['login'] = new Login($grav);
        }
        $this->login = $grav['login'];

        $this->options = [
            'user'        => $this->input->getOption('user'),
            'password1'   => $this->input->getOption('password')
        ];

        $this->validateOptions();

        $helper = $this->getHelper('question');
        $data   = [];

        $this->output->writeln('<green>Changing User Password</green>');
        $this->output->writeln('');

        if (!$this->options['user']) {
            // Get username and validate
            $question = new Question('Enter a <yellow>username</yellow>: ');
            $question->setValidator(function ($value) {
                $this->validate('user', $value);

                if (!User::find($value, ['username'])->exists()) {
                    throw new \RuntimeException('Username "' . $value . '" does not exist, please pick another username');
                };

                return $value;
            });

            $username = $helper->ask($this->input, $this->output, $question);
        } else {
            $username = $this->options['user'];
        }


        if (!$this->options['password1']) {
            // Get password and validate
            $password = $this->askForPassword($helper, 'Enter a <yellow>new password</yellow>: ', function ($password1) use ($helper) {
                $this->validate('password1', $password1);

                // Since input is hidden when prompting for passwords, the user is asked to repeat the password
                return $this->askForPassword($helper, 'Repeat the <yellow>password</yellow>: ', function ($password2) use ($password1) {
                    return $this->validate('password2', $password2, $password1);
                });
            });

            $data['password'] = $password;
        } else {
            $data['password'] = $this->options['password1'];
        }

        // Lowercase the username for the filename
        $username = mb_strtolower($username);

        /** @var UniformResourceLocator $locator */
        $locator = Grav::instance()['locator'];
        
        // Grab the account file and read in the information before setting the file (prevent setting erase)
        $oldUserFile = CompiledYamlFile::instance($locator->findResource('account://' . $username . YAML_EXT, true, true));
        $oldData = (array)$oldUserFile->content();
        
        //Set the password field to new password
        $oldData['password'] = $data['password'];
        
        // Create user object and save it using oldData (with updated password)
        $user = new User($oldData);
        $file = CompiledYamlFile::instance($locator->findResource('account://' . $username . YAML_EXT, true, true));
        $user->file($file);
        $user->save();

        $this->output->writeln('');
        $this->output->writeln('<green>Success!</green> User <cyan>' . $username . '\'s</cyan> password changed.');
    }

    /**
     *
     */
    protected function validateOptions()
    {
        foreach (array_filter($this->options) as $type => $value) {
            $this->validate($type, $value);
        }
    }

    /**
     * @param string $type
     * @param mixed  $value
     * @param string $extra
     *
     * @return string
     */
    protected function validate($type, $value, $extra = '')
    {
        return $this->login->validateField($type, $value, $extra);
    }

    /**
     * Get password and validate.
     *
     * @param Helper   $helper
     * @param string   $question
     * @param callable $validator
     *
     * @return string
     */
    protected function askForPassword(Helper $helper, $question, callable $validator)
    {
        $question = new Question($question);
        $question->setValidator($validator);
        $question->setHidden(true);
        $question->setHiddenFallback(true);

        return $helper->ask($this->input, $this->output, $question);
    }
}
