<?php

/**
 *
 *  Class ki skrbi za placila s kreditno kartico (stripe) - TODO
 *
*/


use \Stripe\Stripe;
use \Stripe\Customer;
use \Stripe\ApiOperations\Create;
use \Stripe\Charge;


class UserNarocilaStripe{


    private $narocilo;

    private $apiKey;
    private $stripeService;


    public function __construct($narocilo_id ){
        global $app_settings;
        global $stripe_secret;
        global $stripe_key;

        $this->apiKey = $stripe_secret;

        $this->stripeService = new \Stripe\Stripe();
        $this->stripeService->setVerifySslCerts(false);
        $this->stripeService->setApiKey($this->apiKey);

        if($narocilo_id > 0){

            // Dobimo podatke narocila
            $sqlNarocilo = sisplet_query("SELECT un.*, u.name, u.surname, u.email, up.name AS package_name, up.description AS package_description, up.price AS package_price
                                            FROM user_access_narocilo un, users u, user_access_paket up
                                            WHERE un.id='".$narocilo_id."' AND un.usr_id=u.id AND un.package_id=up.id");
            if(mysqli_num_rows($sqlNarocilo) > 0){
                $this->narocilo = mysqli_fetch_array($sqlNarocilo);
            }
            else{
                die("Napaka pri komunikaciji s stripe! Narocilo ne obstaja.");
            }
        }
        else {
			die("Napaka pri komunikaciji s stripe! Manjka ID naročila.");
		}
    }


    // Placamo narocilo s kreditno kartico preko stripa
    public function stripePayment($token){
        
        $UA = new UserNarocila();
        $cena = $UA->getPrice($this->narocilo['package_name'], $this->narocilo['trajanje'], $this->narocilo['discount']);

        if($this->narocilo['trajanje'] == 1)
            $months_string = 'mesec';
        elseif($this->narocilo['trajanje'] == 2)
            $months_string = 'meseca';
        elseif($this->narocilo['trajanje'] == 3 || $this->narocilo['trajanje'] == 4)
            $months_string = 'mesece';
        else
            $months_string = 'mesecev';

            
        // Zavezanec iz tujine ima racun/predracun brez ddv
        if($UA->isWithoutDDV($this->narocilo['id'])){
            $ddv = 0;
            $cena_za_placilo = $cena['final_without_tax'];
        }   
        else{
            $ddv = 1;
            $cena_za_placilo = $cena['final'];
        }
        
        // Podatki za kartico potrebni za placilo
        $cardDetails = array(
            'email' => $this->narocilo['email'],
            'token' => $token,

            'amount' => $cena_za_placilo * 100,
            'currency_code' => 'eur',
            'item_name' => '1KA naročnina (paket '.strtoupper($this->narocilo['package_name']). ' - '.$this->narocilo['trajanje'].' '.$months_string.')',
            'item_number' => $this->narocilo['id'],
        );

        // Izvedemo placilo - stripe response
        try{
            $stripeResponse = $this->chargeAmountFromCard($cardDetails);
        }
        catch (Exception $e){
            $response['error'] = 'ERROR! '.$e->getMessage();
            return $response;
        }
        
        // Vstavimo plačilo v bazo
        $sqlNarocilo = sisplet_query("INSERT INTO user_access_stripe_charge 
                                        (narocilo_id, description, price, amount_paid, status, balance_transaction, time)
                                        VALUES
                                        ('".$this->narocilo['id']."', '".$cardDetails['item_name']."', '".$cena_za_placilo."', '".($stripeResponse['amount'] / 100)."', '".$stripeResponse['status']."', '".$stripeResponse['balance_transaction']."', NOW())
                                    ");
        if (!$sqlNarocilo){
            $response['error'] = 'ERROR! '.mysqli_error($GLOBALS['connect_db']);
            $response['success'] = false;
            
            return $response;
        }
        $response = array();

        // Placilo uspesno
        if ($stripeResponse['amount_refunded'] == 0 
                && empty($stripeResponse['failure_code']) 
                && $stripeResponse['paid'] == 1 
                && $stripeResponse['captured'] == 1 
                && $stripeResponse['status'] == 'succeeded'
            ) {
        
            $response['success'] = true;
            $response['stripe_note'] = "Stripe payment is completed successfully. The TXN ID is " . $stripeResponse["balance_transaction"];
        }
        // Placilo ni uspelo
        else{
            $response['error'] = 'ERROR! Stripe payment failed. Failure code '.$stripeResponse['failure_code'];
            $response['success'] = false;
        }  
        
        return $response;
    }


    private function chargeAmountFromCard($cardDetails){

        // Iz emaila in tokena ustvarimo stranko
        $customerDetailsAry = array(
            'email' => $cardDetails['email'],
            'source' => $cardDetails['token']
        );
        $customerResult = $this->addCustomer($customerDetailsAry);
        $charge = new Charge();

        // Napolnimo podatke za placilo
        $cardDetailsAry = array(
            'customer' => $customerResult->id,

            'amount' => $cardDetails['amount'],
            'currency' => $cardDetails['currency_code'],
            'description' => $cardDetails['item_name'],

            'metadata' => array(
                'order_id' => $cardDetails['item_number']
            )
        );

        // Izvedemo "charge"
        $result = $charge->create($cardDetailsAry);

        return $result->jsonSerialize();
    }

    private function addCustomer($customerDetailsAry){
        
        $customer = new Customer();
        $customerDetails = $customer->create($customerDetailsAry);
        
        return $customerDetails;
    }
}