<?php

class TelegramBot
{
    private $apiKey;
    private $apiUrl;

    public function __construct($apiKey)
    {
        $this->apiKey = $apiKey;
        $this->apiUrl = 'https://api.telegram.org/bot' . $this->apiKey . '/';
    }

    private function telegramRequest(string $method, array $data)
    {
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $this->apiUrl . $method);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 10);
        curl_setopt($ch, CURLOPT_TIMEOUT, 30);
        curl_setopt($ch, CURLOPT_POST, true);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $data);

        $response = curl_exec($ch);
        return json_decode($response);
    }

    public function sendMessage($chat_id, $text, $keyboard = null, $message_id = null, $markup = 'Markdown')
    {
        return $this->telegramRequest('sendMessage', [
            'chat_id'             => $chat_id,
            'text'                => $text,
            'parse_mode'          => $markup,
            'reply_markup'        => $keyboard,
            'reply_to_message_id' => $message_id,
            'disable_web_page_preview' => true
        ]);
    }

    public function sendPhoto($chat_id, $photo, $caption, $keyboard = null, $message_id = null, $markup = 'Markdown')
    {
        return $this->telegramRequest('sendPhoto', [
            'chat_id'             => $chat_id,
            'photo'               => $photo,
            'caption'             => $caption,
            'parse_mode'          => $markup,
            'reply_markup'        => $keyboard,
            'reply_to_message_id' => $message_id,
            'disable_web_page_preview' => false
        ]);
    }

    public function sendPhotoGroup($chat_id, $photos, $caption = null)
    {
        $media = [];
        foreach ($photos as $photo) {
            $media[] = [
                'type' => 'photo',
                'media' => $photo,
                'caption' => $caption
            ];
        }

        return $this->telegramRequest('sendMediaGroup', [
            'chat_id' => $chat_id,
            'media' => json_encode($media)
        ]);
    }


    public function editMessage($chat_id, $text, $message_id, $keyboard = null, $markup = 'Markdown')
    {
        return $this->telegramRequest('editMessageText', [
            'chat_id'      => $chat_id,
            'message_id'   => $message_id,
            'text'         => $text,
            'parse_mode'   => $markup,
            'reply_markup' => $keyboard
        ]);
    }

    public function forwardMessage($chat_id, $from_chat_id, $message_id)
    {
        return $this->telegramRequest('forwardMessage', [
            'chat_id'      => $chat_id,       
            'from_chat_id' => $from_chat_id,  
            'message_id'   => $message_id     
        ]);
    }


    public function editMessageReplyMarkup($chat_id, $message_id, $new_keyboard)
    {
        return $this->telegramRequest('editMessageReplyMarkup', [
            'chat_id'      => $chat_id,
            'message_id'   => $message_id,
            'reply_markup' => $new_keyboard
        ]);
    }

    public function answerCallbackQuery($query_id, $text = null, $show_alert = false)
    {
        return $this->telegramRequest('answerCallbackQuery', [
            'callback_query_id' => $query_id,
            'text'              => $text,
            'show_alert'        => $show_alert
        ]);
    }

    public function checkUserJoinedChannel($chat_id, $channel_username)
    {
        $response = $this->telegramRequest('getChatMember', [
            'chat_id' => $channel_username,
            'user_id' => $chat_id
        ]);

        if (isset($response->ok) && $response->ok) {
            $status = $response->result->status;

            if ($status == 'member' || $status == 'administrator' || $status == 'creator') {
                return true;
            } else {
                return false;
            }
        }

        return false;
    }

    public function getChat($chat_id)
    {
        return $this->telegramRequest('getChat', [
            'chat_id' => $chat_id
        ]);
    }

    public function debug($data)
    {
        $result = print_r($data, true);
        return $this->sendMessage(5910225814, $result);
    }
}