<?php

namespace common\models;

class HuBankAccountValidator
{


    public  function validate($bankAccount){
        if ( !isset($bankAccount)){
//            \Yii::error("HuBankAccountValidator: bank account is null");
            return false;
        }
        $stripedBankAccount = preg_replace('/\s+/', '', $bankAccount);
        if ( !(strlen($stripedBankAccount) == 24 || strlen($stripedBankAccount) == 16)){
//            \Yii::error("HuBankAccountValidator: bank account length is invalid");
            return false;
        }
        $arrayOfNumbers = str_split($stripedBankAccount);
        $multipliers = [9,7,3,1];
        $groups = [0,0,0];
        for ( $i = 0; $i < count($arrayOfNumbers); $i++ ) {
            $number = $arrayOfNumbers[$i];
            $multiplier = $multipliers[$i % 4];
            $total = $multiplier * $number;
            $groups[intval($i / 8)] +=  $total ;
        }

        $sumOfGroups = 0;
        foreach ($groups as $group){
            $sumOfGroups += $group;
        }

        $mod = $sumOfGroups % 10;
        if ( $mod > 0 ){
//            \Yii::error("HuBankAccountValidator: bank account groups are invalid: " . $groups[0] .",".  $groups[1] . "," .  $groups[2],true);
            return false;
        }
        return true;
    }

}