<?

namespace integration;

class Robokassa {
    var $login  = '';
    var $pass1  = '';
    var $pass2  = '';
    var $isTest = false;
    var $isRecurrent = false;
    var $previousInvoiceID = null;

    public function __construct($login,$pass1,$pass2,$isTest = false,$isRecurrent = false) {
        $this->login  = $login;
        $this->pass1  = $pass1;
        $this->pass2  = $pass2;
        $this->isTest = $isTest;
        $this->isRecurrent = $isRecurrent;
    }

    public function getLink($sum,$invId,$invDesc='',$receipt=null,$email=null){
        $sum = floatval(number_format($sum,"2",".",""));
        /*
            $receipt = [
                "sno" => "usn_income",
                "items" => [
                    [
                        "name"            =>"Сервисы mstome",
                        "quantity"        => 1,
                        "sum"             => floatval($price),
                        "payment_method"  => "full_payment",
                        "payment_object"  => "service",
                        "tax"             => "none"
                    ]
                ],
            ];
        /**/
        //$r_json = json_encode_($receipt);
        //$r_url = urlencode($r_json);

        $receiptJson = urlencode(json_encode($receipt, 256));
        $crc  = self::getSignature( self::getSignatureString( $sum, $invId, $receiptJson ) );


        $action_url = 'https://auth.robokassa.ru/Merchant/Index.aspx';
        if($this->previousInvoiceID){
            $action_url = 'https://auth.robokassa.ru/Merchant/Recurring';
        }

        $url = $action_url."?MrchLogin=".$this->login."&OutSum=".$sum.
            "&InvId=$invId&SignatureValue=$crc&Encoding=utf-8".
            ($email?'&Email='.$email:'').
            ($receiptJson?'&Receipt='.urlencode($receiptJson):'').
            ($invDesc?'&Description='.urlencode(substr1251($invDesc,0,100)):'').
            ($this->previousInvoiceID?'&PreviousInvoiceID='.$this->previousInvoiceID:'').
            ($this->isTest?'&isTest=1':'').
            ($this->isRecurrent?'&isRecurrent=true':'')
        ;
        return $url;
    }


    private function getSignatureString($sum, $invId, $receiptJson) {
        return implode( ':',
            array_diff(
                array( $this->login, $sum, $invId, $receiptJson, $this->pass1, ),
                array( false, '', null )
            )
        );
    }
    public function getSignature($string, $method = 'md5') {
        if (in_array($method, array('md5', 'ripemd160', 'sha1', 'sha256', 'sha384', 'sha512'))) {
            return strtoupper(hash($method, $string));
        }
        //throw new \Exception('Wrong Signature Method');
        return '';
    }


}