<?php

    $token = $_GET["token"];
    $id = "-181113882";

    function send($token, $id , $message)
    {
        $url = 'https://api.vk.com/method/messages.send';
        $rand = rand(1000000000, 9999999999);
        $params = array(
            'user_id' => $id,
            'message' => $message,
            'random_id' => $rand,
            'access_token' => $token,
            'v' => '5.95',
        );

        // В $result вернется id отправленного сообщения
        $result = file_get_contents($url, false, stream_context_create(array(
            'http' => array(
                'method'  => 'POST',
                'header'  => 'Content-type: application/x-www-form-urlencoded',
                'content' => http_build_query($params)
            )
        )));
    }

    function ArrayLetters($length, $proto, $dead) {

        $dict = file("wordlist/" . $length . "_letters.txt", FILE_IGNORE_NEW_LINES);

        $exp = '/^' . str_replace('*', '\w{1}', $proto) . '$/u';

        $words = array_filter($dict, function ($v) use ($exp, $dead) {
            $dw = true;
            foreach (array_diff(preg_split('//u', $dead), ['']) as $d) {
                if (preg_match('/' . $d . '/u', $v)) {
                    $dw = false;
                    break;
                };
            }
            return (preg_match($exp, $v) && $dw);
        });

        $letters = [];
        foreach ($words as $v) {
            $imp = implode('|', preg_split('//u', str_replace('*', '', $proto)));
            foreach (array_diff(preg_split('//u', preg_replace('/(' . $imp . ')/u', '', $v)), ['']) as $w) {
                $letters[] = $w;
            }
        }

        $percentageLetters = [];
        $count = count($words);
        foreach (array_unique($letters) as $v) {
            $c = 0;
            foreach ($words as $w) {
                if (preg_match('/' . $v . '/u', $w)) $c++;
            }
            $percentageLetters[] = ['letter' => $v, 'percent' => round(($c / $count * 100), 1) . '%'];
        }
        uasort($percentageLetters, function ($a, $b) {
            return ((float)$a['percent'] > (float)$b['percent']) ? -1 : 1;
        });

        /* массив букв со 100% вероятностью */
        $arrPercent100 = array_values(array_filter($percentageLetters, function($data) {
            return ((float)$data['percent'] == 100);
        }));

        /* буква с самым большим процентом */
        $mostLetter = array_shift($percentageLetters);

        if ($arrPercent100) {
            return $arrPercent100;
        }
        elseif ($mostLetter) {
            return $mostLetter;
        }
    }

    function getlastmess($token, $id, $type)
    {
        $url = 'https://api.vk.com/method/messages.getHistory';
        $params = array(
            'count' => 1,
            'user_id' => $id,
            'access_token' => $token,
            'v' => '5.95',
        );

        // В $result вернется id отправленного сообщения
        $result = file_get_contents($url, false, stream_context_create(array(
            'http' => array(
                'method'  => 'POST',
                'header'  => 'Content-type: application/x-www-form-urlencoded',
                'content' => http_build_query($params)
            )
        )));

        $arresult = json_decode($result, true);
        $lastmes = $arresult['response']['items'][0]['text'];
        $exparresult = explode("\n",$lastmes);

        switch ($type) {
            case "proto":
                $letters = str_replace(array('📗 Отгаданные буквы:', ' '), '', $exparresult[0]);
                break;
            case "dead":
                $letters = str_replace(array('👿 Неверные попытки:', ', ', ' '), '', $exparresult[1]);
                break;
        }

        return $letters;

    }

    $length = strlen(getlastmess($token, $id, "proto"));
    $proto = getlastmess($token, $id, "proto");
    $dead = getlastmess($token, $id, "dead");

    $arrayletters = ArrayLetters($length, $proto, $dead);

    if ($arrayletters==NULL) {
        send($token, $id, "🎴 Играть");
    }

    foreach( $arrayletters as $arrayletter ) {
    $letter = $arrayletter['letter'];
        //send($token, $id, $letter);
        //sleep(2);
        print_r($arrayletter['letter']);
    }

    //var_dump($arrayletters);

?>