<?php


namespace MirfalahTech\Laravel\Payment\Gateway\RazerPay;


use Illuminate\Contracts\Config\Repository;
use Illuminate\Contracts\Events\Dispatcher;
use Illuminate\Http\Request;
use Illuminate\Support\Arr;
use Illuminate\Support\Facades\Response as Res;
use MirfalahTech\Laravel\Payment\Contracts\PayableEntity;
use MirfalahTech\Laravel\Payment\Contracts\PaymentGatewayDriver;
use MirfalahTech\Laravel\Payment\Events\CallbackVerifiedEvent;
use MirfalahTech\Laravel\Payment\Events\PaymentFailedEvent;
use MirfalahTech\Laravel\Payment\Events\PaymentPendingEvent;
use MirfalahTech\Laravel\Payment\Events\PaymentSuccessEvent;
use MirfalahTech\Laravel\Payment\Events\ReturnVerifiedEvent;
use MirfalahTech\Laravel\Payment\Facade\Payment;
use MirfalahTech\Laravel\Payment\Traits\BillStatusBoolean;
use Symfony\Component\HttpFoundation\Response;

class RazerPayDriver implements PaymentGatewayDriver
{
    use BillStatusBoolean;

    /**
     * @var string
     */
    protected $endpoint;

    /**
     * @var string
     */
    protected $merchant_id;

    /**
     * @var string
     */
    protected $secret_key;
    /**
     * @var string
     */
    protected $verify_key;

    /**
     * @var Repository
     */
    protected $config;

    /**
     * @var Dispatcher
     */
    protected $events;

    public function __construct(Repository $config, Dispatcher $events)
    {
        $this->config = $config;
        $this->events = $events;

        $this->endpoint = rtrim($config->get('payment.gateway.razerpay.endpoint'), '/');
        $this->merchant_id = $config->get('payment.gateway.razerpay.merchant_id');
        $this->secret_key = $config->get('payment.gateway.razerpay.secret_key');
        $this->verify_key = $config->get('payment.gateway.razerpay.verify_key');
    }

    public function createPaymentURL(PayableEntity $payable, array $options = []): string
    {
        $orderid = urlencode($payable->getBillId());
        $bill_name = urlencode($payable->getBillName());
        $bill_email = $payable->getBillEmail();
        $bill_mobile = $payable->getBillPhoneNumber();
        $detail = urlencode($payable->getBillDescription());
        $country = $payable->getBillCountry();
        $bill_desc = urlencode(preg_replace('/[^A-Z0-9,\-_]/i', '_', $detail));
        $amount = sprintf('%0.2f', $payable->getBillAmount());
        $currency = $payable->getBillCurrency();
        $vcode = md5($amount . $this->merchant_id . $payable->getBillId() . $this->verify_key);

        $query = array_merge(
            compact(
                'amount', 'orderid', 'bill_name', 'bill_email', 'bill_mobile',
                'bill_desc', 'country', 'vcode', 'currency'
            ),
            Arr::only($this->config->get('payment.gateway.razerpay.options', []), ['channel', 'returnurl', 'callbackurl']),
            Arr::only($options, ['channel', 'returnurl', 'callbackurl'])
        );
        return "$this->endpoint/MOLPay/pay/$this->merchant_id/?" .
            http_build_query($query);
    }

    public function verifyGatewayReturn(Request $request): bool
    {
        if ($this->verifyRequest($request)) {
            $this->events->dispatch(new ReturnVerifiedEvent('razerpay', $this, $request));
            $this->dispatchStatusEvent($request);
            return true;
        }
        return false;
    }

    public function verifyGatewayCallback(Request $request, Response &$response = null): bool
    {
        $response = $request->request->has('nbcb') ?
            Res::make('CBTOKEN:MPSTATOK') :
            Res::make('OK');

        if ($this->verifyRequest($request)) {
            $this->events->dispatch(new CallbackVerifiedEvent('razerpay', $this, $request));
            $this->dispatchStatusEvent($request);
            return true;
        }
        return false;
    }

    protected function verifyRequest(Request $request): bool
    {
        $tranID = $request->request->get('tranID');
        $order_id = $request->request->get('orderid');
        $status = $request->request->get('status');
        $domain = $request->request->get('domain');
        $amount = $request->request->get('amount');
        $currency = $request->request->get('currency');
        $appcode = $request->request->get('appcode');
        $pay_date = $request->request->get('paydate');

        $key0 = md5($tranID . $order_id . $status . $domain . $amount . $currency);

        $key1 = md5($pay_date . $domain . $key0 . $appcode . $this->secret_key);

        return $key1 == $request->request->get('skey');
    }

    protected function dispatchStatusEvent(Request $request)
    {
        switch ($this->getBillStatus($request)) {
            case Payment::SUCCESS:
                $this->events->dispatch(new PaymentSuccessEvent('razerpay', $this, $request));
                break;
            case Payment::PENDING:
                $this->events->dispatch(new PaymentPendingEvent('razerpay', $this, $request));
                break;
            case Payment::FAILED:
                $this->events->dispatch(new PaymentFailedEvent('razerpay', $this, $request));
                break;
        }
    }

    public function getBillIdFromRequest(Request $request): ?string
    {
        return $request->request->get('orderid');
    }

    public function getBillStatus(Request $request): ?int
    {
        if ($request->request->has('status')) {
            $status = $request->request->get('status');
            switch ($status){
                case '00':
                    return Payment::SUCCESS;
                case '11':
                    return Payment::FAILED;
                default:
                    return Payment::PENDING;
            }
        } else {
            return null;
        }
    }
}