<?php
namespace App\Services;

use Google2FA;

class MyGoogle2FA
{
    private $fileName = 'google2fasecret.key';

    private $name = 'mein.sterntours.de';

    private $email = '';

    private $secretKey;

    private $keySize = 32;

    private $keyPrefix = '';

    private $inlineUrl = '';

    private $valid = '';

    private $user = null;


    public function init($user){
        $this->name = str_replace('https://', '', config('app.url'));
        $this->user = $user;
        $this->email = $user->email;
        return $this;
    }

    public function generate()
    {
        $this->generateSecretKey();        
        $this->inlineUrl = $this->getQRCodeInline();
    }

    public function check2Fa($code)
    {
        if(!$this->getSecretKey()){
            return false;
        }
        $this->valid = $this->validateInput($code);
        return $this->valid;
    }

    public function getBy($key){
        return isset($this->{$key}) ? $this->{$key} : '';
    }
   
    private function getQRCodeInline()
    {
        return Google2FA::getQRCodeInline(
            $this->name,
            $this->email,
            $this->secretKey
        );
    }
    private function getSecretKey()
    {
        if (! $this->secretKey = $this->getStoredKey())
        {
           return null;
        }
        return $this->secretKey;
    }

    private function generateSecretKey()
    {
        if (! $this->secretKey = $this->getStoredKey())
        {
            $this->secretKey = Google2FA::generateSecretKey($this->keySize, $this->keyPrefix);
            $this->user->secret_key = $this->secretKey;
            $this->user->save();
        }
        return $this->secretKey;
    }

    private function getStoredKey()
    {
        // No need to read it from disk it again if we already have it
        if ($this->secretKey)
        {
            return $this->secretKey;
        }
        if(! $this->user->secret_key){
            return null;
        }
        return $this->user->secret_key;
    }

    private function validateInput($code)
    {    
        // Verify the code
        return Google2FA::verifyKey($this->secretKey, $code);
    }

    public static function logout()
    {
        (new AuthGoogle2FA(request()))->logout();
    }
   
}