<?php

class TiampayApi
{
    protected $api_key;
    protected $endpoint;

    public function __construct($api_key, $base_url)
    {
        $this->api_key = preg_replace('/^mw_/', '', trim($api_key));
        $this->endpoint = rtrim($base_url, '/') . '/api/v1/send';
    }

    public function send($to, $amount, $currency, $request_id = '', $ip_address = '')
    {
        $post = array(
            'api_key' => $this->api_key,
            'to' => $to,
            'amount' => $amount,
            'currency' => strtoupper($currency),
        );

        if ($request_id !== '') {
            $post['request_id'] = $request_id;
        }
        if ($ip_address !== '') {
            $post['ip_address'] = $ip_address;
        }

        $ch = curl_init($this->endpoint);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_POST, true);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $post);
        curl_setopt($ch, CURLOPT_TIMEOUT, 20);
        $response = curl_exec($ch);
        $error = curl_error($ch);
        curl_close($ch);

        if ($response === false) {
            return array('status' => 500, 'message' => $error);
        }

        $json = json_decode($response, true);
        return is_array($json) ? $json : array('status' => 500, 'message' => 'Invalid API response');
    }
}