<?php

namespace App\Service;

use Doctrine\ORM\EntityManagerInterface;
use DateTime;
use App\Entity\SMSMessage;

class RisingTideGateway
{
    const SERVER_URL        = 'https://xdngw01.wyrls.net/documents';

    // entity manager
    protected $em;

    // rising tide parameters
    protected $user;
    protected $pass;
    protected $usage_type;
    protected $shortcode;
    protected $dr_url;

    public function __construct(EntityManagerInterface $em, $user, $pass, $usage_type, $shortcode, $dr_url)
    {
        $this->em = $em;
        $this->user = $user;
        $this->pass = $pass;
        $this->usage_type = $usage_type;
        $this->shortcode = $shortcode;
        $this->dr_url = $dr_url;
    }

    public function sendSMS($mobile_num, $mask, $message)
    {
        // make sure number is acceptable to RT
        // at this point, assume that mobile is numeric and valid mobile number
        $clean_num = $this->cleanPhoneNumber($mobile_num);

        if ($clean_num === false)
        {
            error_log('Invalid mobile number provided. Cannot send SMS message to ' . $mobile_num);
            return;
        }

        $headers = [
            'Content-Type: application/vnd.net.wyrls.Document-v3+json'
        ];

        $sms = new SMSMessage();
        $sms->setFrom($this->shortcode)
            ->setFromAlias($mask)
            ->setTo($clean_num)
            ->setMessage($message)
            ->setStatus('sent');

        $this->em->persist($sms);
        $this->em->flush();

        $date = $sms->getDateCreate();
        // $date = new DateTime();
        $date_string = $date->format('Y-m-d') . 'T' . $date->format('H:m:s');

        $data = [
            'id' => $sms->getID(),
            'from' => $this->shortcode,
            'from_alias' => $mask,
            'to' => $clean_num,
            'content_type' => 'text/plain',
            'body' => $message,
            'date' => $date_string,
            'usagetype' => $this->usage_type,
            'delivery_receipt_url' => $this->dr_url,
        ];
        // error_log(print_r($data, true));

        $data_json = json_encode($data);

        $userpwd = $this->user . ':' . $this->pass;

        $curl = curl_init();
        curl_setopt($curl, CURLOPT_URL, self::SERVER_URL);
        curl_setopt($curl, CURLOPT_HTTPHEADER, $headers);
        curl_setopt($curl, CURLOPT_VERBOSE, true);
        curl_setopt($curl, CURLOPT_POSTFIELDS, $data_json);
        curl_setopt($curl, CURLOPT_CUSTOMREQUEST, 'POST');
        curl_setopt($curl, CURLOPT_HTTPAUTH, CURLAUTH_BASIC);
        curl_setopt($curl, CURLOPT_USERPWD, $userpwd);
        $result = curl_exec($curl);
        error_log('error_no - ' . curl_errno($curl));
        $http_code = curl_getinfo($curl, CURLINFO_HTTP_CODE);
        error_log($http_code);
        curl_close($curl);

        // error_log($result);
    }

    public function validatePhoneNumber($mobile)
    {
        // check valid number
        $num = trim($mobile);

        // should be 10 digits
        if (strlen($num) != 10)
            return false;

        // should start with '9'
        if ($num[0] != '9')
            return false;

        // should be numeric
        if (!is_numeric($num))
            return false;

        // should not be 9900000000
        if ($num == '9900000000')
            return false;

        return true;
    }

    protected function cleanPhoneNumber($mobile)
    {
        // remove any non digit character from string
        $clean_number = preg_replace('~\D~', '', $mobile);
        // error_log('cleaned ' . $clean_number);

        // does it fit our 09XXXXXXXXX pattern?
        if (preg_match('/^09[0-9]{9}$/', $clean_number))
        {
            // remove first '0'
            $clean_number = substr($clean_number, 1);
            
            // prepend 63
            $clean_number = '63' . $clean_number;

            // error_log("CONVERTED TO $clean_number");
            return $clean_number;
        }
        // does it fit our 63XXXXXXXXXX pattern?
        else if (preg_match('/^63[0-9]{10}$/', $clean_number))
        {
            // leave alone
            return $clean_number;
        }
        // does it fit our 9XXXXXXXXX pattern?
        else if (preg_match('/^9[0-9]{9}$/', $clean_number))
        {
            // prepend 63
            $clean_number = '63' . $clean_number;

            // error_log("CONVERT TO $clean_number");
            return $clean_number;
        }

        return false;
    }
}