<?php
class Api
{
    /** API URL */
    public $api_url = 'https://smmbott.com/api/v2.php';

    /** Your API key */
    public $api_key = '';

    /** Add order */
    public function order($data)
    {
        $post = array_merge(['key' => $this->api_key, 'action' => 'add'], $data);
        return json_decode((string)$this->connect($post));
    }

    /** Get order status */
    public function status($order_id)
    {
        return json_decode(
            $this->connect([
                'key' => $this->api_key,
                'action' => 'status',
                'order' => $order_id
            ])
        );
    }

    /** Get orders status */
    public function multiStatus($order_ids)
    {
        return json_decode(
            $this->connect([
                'key' => $this->api_key,
                'action' => 'status',
                'orders' => implode(",", (array)$order_ids)
            ])
        );
    }

    /** Get services */
    public function services()
    {
        return json_decode(
            $this->connect([
                'key' => $this->api_key,
                'action' => 'services',
            ])
        );
    }

    /** Create refill */
    public function refill($orderId)
    {
        return json_decode(
            $this->connect([
                'key' => $this->api_key,
                'action' => 'refill',
                'order' => $orderId,
            ])
        );
    }

    /** Create multiple refill */
    public function multiRefill(array $orderIds)
    {
        return json_decode(
            $this->connect([
                'key' => $this->api_key,
                'action' => 'refill',
                'orders' => implode(',', $orderIds),
            ]),
            true
        );
    }

    /** Get refill status */
    public function refillStatus($refillId)
    {
        return json_decode(
            $this->connect([
                'key' => $this->api_key,
                'action' => 'refill_status',
                'refill' => $refillId,
            ])
        );
    }

    /** Get multiple refill status */
    public function multiRefillStatus(array $refillIds)
    {
        return json_decode(
            $this->connect([
                'key' => $this->api_key,
                'action' => 'refill_status',
                'refills' => implode(',', $refillIds),
            ]),
            true
        );
    }

    /** Cancel orders */
    public function cancel(array $orderIds)
    {
        return json_decode(
            $this->connect([
                'key' => $this->api_key,
                'action' => 'cancel',
                'orders' => implode(',', $orderIds),
            ]),
            true
        );
    }

    /** Get balance */
    public function balance()
    {
        return json_decode(
            $this->connect([
                'key' => $this->api_key,
                'action' => 'balance',
            ])
        );
    }

    private function connect($post)
    {
        $_post = [];
        if (is_array($post)) {
            foreach ($post as $name => $value) {
                $_post[] = $name . '=' . urlencode($value);
            }
        }

        $ch = curl_init($this->api_url);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($ch, CURLOPT_POST, 1);
        curl_setopt($ch, CURLOPT_HEADER, 0);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 1);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 2);
        curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);

        if (is_array($post)) {
            curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($post));
        }
        $result = curl_exec($ch);
        if (curl_errno($ch) != 0 && empty($result)) {
            $result = false;
        }
        curl_close($ch);
        return $result;
    }
}

// Examples

$api = new Api();

$services = $api->services(); // Return all services

$balance = $api->balance(); // Return account balance

// Add an order
$order = $api->order(['service' => 1, 'link' => 'http://example.com/test', 'quantity' => 100]);

$status = $api->status($order->order); // Return status, charge, remains, start count, currency

$statuses = $api->multiStatus([1, 2, 3]); // Return status for several orders at once

$refill = $api->refill($order->order); // Request a refill for one order

$refillStatus = $api->refillStatus($refill->refill); // Check that refill's status

$cancel = $api->cancel([1, 2]); // Request cancellation for one or more orders