<?php
/* This file is forked from the original author Micro Ocean Technologies's MoceanAPI Order SMS Notification plugin on 7/1/2024 */

/*
 * Integration with NotifySMS RESTful API
 *
 * Class methods:
 *      sendSMS($to, $from, $message, $message_type, $dlr_url, $udh)
 *      receiveDLR()
 *      receiveMO()
 *      messageStatus($msgid)
 *      accountBalance()
 *      accountPricing($mcc, $mnc)
 */

class NotifySMS {

    // Account credentials
    private $api_key = '';
    private $api_secret = '';
    private $log;

    // REST API URL
    public $rest_ip_address = 'https://api.360messenger.com';
    public $rest_base_url = "https://api.360messenger.com";
    public $actual_api_url;

    private $rest_commands = array (
            'send_sms' => array('url' => '/sendMessage/', 'method' => 'POST'),
            'get_message_status' => array('url' => '/report/message', 'method' => 'GET'),
            'get_balance' => array('url' => '/account/balance', 'method' => 'GET'),
            'get_pricing' => array('url' => '/account/pricing', 'method' => 'GET')
    );

    public $response_format = 'json';

    public $message_type_option = array('7-bit' => 1, '8-bit' => 2, 'Unicode' => 3);

    public function __construct($api_key = null, $api_secret = null)
    {
        $this->log = new Notify_WooCoommerce_Logger();
        $this->api_key = $api_key;
        $this->api_secret = $api_secret;
        $this->actual_api_url = $this->rest_base_url;
    }

    public function setApiUrl($use_domain = true)
    {
        $this->actual_api_url = ($use_domain) ? $this->rest_base_url : $this->rest_ip_address;
    }

    function sendSMS($from, $to, $message, $medium, $message_type = null, $dlr_url = null, $udh = null)
    {
        $this->log->add("360MessengerWhatsApp", "WhatsApp Sent to {$to}: {$message} ");
        // Send request to NotifySMS gateway

        // return json_encode(array(
        //     'messages' => array(
        //         array(
        //             'status' => 0,
        //             'msgid' => sha1( random_bytes(128) ),
        //         )
        //     )
        // ));

        $params = array(
                'phonenumber' => $to,
                'text' => $message,
                '360notify-medium' => "wordpress_order_notification"
        );
        return $this->invokeApi ('send_sms', $params);
    }

    public function receiveDLR($data)
    {
        $delivery_status = array(1 => 'Success', 2 => 'Failed', 3 => 'Expired');

        $delivery_report_data = new stdClass();
        $delivery_report_data->from = $data['notify-from'];
        $delivery_report_data->to = $data['notify-to'];
        $delivery_report_data->dlr_status = $delivery_status[$data['notify-dlr-status']];
        $delivery_report_data->msgid = $data['notify-msgid'];
        $delivery_report_data->error_code = $data['notify-error-code'];
        $delivery_report_data->dlr_received_time = gmdate('Y-m-d H:i:s');

        return $delivery_report_data;
    }

    public function receiveMO($data)
    {
        $mo_message = new stdClass();
        $mo_message->from = $data['notify-from'];
        $mo_message->to = $data['notify-to'];
        $mo_message->keyword = $data['notify-keyword'];
        $mo_message->text = $data['notify-text'];
        $mo_message->coding = $data['notify-coding'];
        $mo_message->time = $data['notify-time'];

        if($mo_message->coding == $this->message_type_option['Unicode']) {
            $mo_message->keyword = $this->utf16HexToUtf8($mo_message->keyword);
            $mo_message->text = $this->utf16HexToUtf8($mo_message->text);
        }

        return $mo_message;
    }

    public function messageStatus($msgid)
    {
        $params = array('notify-msgid' => $msgid);
        return $this->invokeApi ('get_message_status', $params);
    }

    public function accountBalance()
    {
        return $this->invokeApi ('get_balance');
    }

    public function accountPricing($mcc = null, $mnc = null)
    {
        $params = array();
        if($mcc) {
            $params['notify-mcc'] = $mcc;
        }
        if($mnc) {
            $params['notify-mnc'] = $mnc;
        }
        return $this->invokeApi ('get_pricing', $params);
    }

    private function invokeApi($command, $params = array())
{
    if(get_option("notify_domain_reachable")) {
        $this->setApiUrl(true);
    } else {
        $this->setApiUrl(false);
    }
    
    // Get REST URL and HTTP method
    $command_info = $this->rest_commands[$command];
    $url = $this->actual_api_url . $command_info['url'].$this->api_key;
    $method = $command_info['method'];

    $this->log->add("360MessengerWhatsApp", "Using url: {$url}");

    // Build the post data
    $args = [
        'timeout'     => 15,
        'redirection' => 5,
        // 'blocking'    => true,
        // 'sslverify'   => false,
        'headers'     => [
            'Content-Type' => 'application/x-www-form-urlencoded; charset=UTF-8',
        ],
    ];

    if($method == 'POST') {
        $args['body'] = $params;
        $response = wp_remote_post($url, $args);
    } else {
        $query_string = http_build_query($params);
        $url = $url . '?' . $query_string;
        $response = wp_remote_get($url, $args);
    }

	if (is_wp_error($response)) {
		throw new Exception('HTTP request error: ' . esc_html($response->get_error_message()));
	}


    $body = wp_remote_retrieve_body($response);

    return $body;
}


    private function utf16HexToUtf8($string)
    {
        if(strlen($string) % 4) {
            $string = '00'.$string;
        }

        $converted_string = '';
        $string_length = strlen($string);
        for($counter = 0; $counter < $string_length; $counter += 4) {
            $converted_string .= "&#".hexdec(substr($string, $counter, 4)).";";
        }
        $converted_string = mb_convert_encoding($converted_string, "UTF-8", "HTML-ENTITIES");

        return $converted_string;
    }
}
?>