<?php

require('../vendor/autoload.php');

$app = new Silex\Application();
$app['debug'] = true;

use FormulaParser\FormulaParser;

// Register the monolog logging service
$app->register(new Silex\Provider\MonologServiceProvider(), array(
  'monolog.logfile' => 'php://stderr',
));

// Register view rendering
$app->register(new Silex\Provider\TwigServiceProvider(), array(
    'twig.path' => __DIR__.'/views',
));

// Our web handlers

$app->get('/', function() use($app) {
  return 'VK Bot';
});

$app->post('/bot', function() use($app) {
  $data = json_decode(file_get_contents('php://input'));
  if (!$data)
    return 'No data';

  $count = json_decode( file_get_contents('https://api.vk.com/method/messages.getConversations?offset=0&count=100&filter=unanswered&access_token='.getenv('VK_TOKEN').'&v=5.103'))->response->count;
  if ($data->type == 'confirmation')
    return getenv('VK_CONFIRMATION_CODE');
  if ($count != 0)
  {
      $formula = $data->object->message->text;
      $precision = 2;

      $request_params = array(
        'peer_id' => $data->object->message->from_id,
        'random_id' => rand(1, 2147483647),
        'message' => 'Тестирование работы PHP VK бота на Heroku',
        'access_token' => getenv('VK_TOKEN'),
        'v' => '5.103'
      );

      try {
          $parser = new FormulaParser($formula, $precision);
          $result = $parser->getResult(); // [0 => 'done', 1 => 16.38]
          $request_params['message'] = 'Ответ: ' . number_format($result['1'], $precision, '.',
                 ',');
      } catch (\Exception $e) {
            $request_params['message'] = 'Неверно!';
      }


      file_get_contents('https://api.vk.com/method/messages.send?' . http_build_query($request_params));
      echo 'ok';
  }
  return 'Error';
});

$app->run();