<?php
namespace App\Traits\PaymentGateway;

use Exception;
use App\Models\User;
use App\Models\Transaction;
use Illuminate\Support\Str;
use App\Models\TemporaryData;
use App\Http\Helpers\PaymentGateway;
use Illuminate\Http\Client\Response;
use Illuminate\Support\Facades\Http;
use App\Constants\PaymentGatewayConst;
use App\Models\Admin\PaymentGatewayCurrency;

use Illuminate\Http\Client\RequestException;

trait Razorpay  {

    private $razorpay_gateway_credentials;
    private $request_credentials;
    private $razorpay_api_base_url  = "https://api.razorpay.com/";
    private $razorpay_api_v1        = "v1";
    private $razorpay_btn_pay       = true;

    public function razorpayInit($output) {
        if(!$output) $output = $this->output;
        $request_credentials = $this->getRazorpayRequestCredentials($output);
       
        try{
            if($this->razorpay_btn_pay) {
                // create link for btn pay
                return $this->razorpayCreateLinkForBtnPay($output);
            }
            return $this->createRazorpayPaymentLink($output, $request_credentials);
        }catch(Exception $e) {
           
            throw new Exception($e->getMessage());
        }
    }

    /**
     * Create Link for Button Pay (JS Checkout)
     */
    public function razorpayCreateLinkForBtnPay($output)
    {
        
        $temp_record_token = generate_unique_string('temporary_datas','identifier');
        
        $temp_data = $this->razorPayJunkInsert($temp_record_token); // create temporary information
        
        $btn_link = $this->generateLinkForBtnPay($temp_record_token, PaymentGatewayConst::RAZORPAY);
        if(request()->expectsJson()) {
            $this->output['redirection_response']   = [];
            $this->output['redirect_links']         = [];
            $this->output['redirect_url']           = $btn_link;
            return $this->get();
        }

        return redirect($btn_link);
    }

    /**
     * Button Pay page redirection with necessary data
     */
    public function razorpayBtnPay($temp_data)
    {
        
        $data = $temp_data->data;
        $output = $this->output;
        
        if(!isset($data->razorpay_order)) { // is order is not created the create new order
            // Need to create order
            
            $order = $this->razorpayCreateOrder([
                'amount'            => (int) get_amount($data->amount->total_amount, null, 2) * 100,
                'currency'          => $data->amount->sender_cur_code,
                'receipt'           => $temp_data->identifier,
                'partial_payment'   => false,
            ]);
            
            // Update TempData
            $update_data = json_decode(json_encode($data), true);
            $update_data['razorpay_order'] = $order;
            
            $temp_data->update([
                'data'  => $update_data,
            ]);

            $temp_data->refresh();
        }
        
        $data = $temp_data->data; // update the data variable 
        $order = $data->razorpay_order;
        $user = User::where('id',$temp_data->data->creator_id)->first();
        
        $order_id                   = $order->id;
        $request_credentials        = $this->getRazorpayRequestCredentials($output);
        $output['order_id']         = $order_id;
        $output['key']              = $request_credentials->key_id;
        $output['callback_url']     = $data->callback_url;
        $output['cancel_url']       = $data->cancel_url;
        $output['user']             = $user;

        return view('payment-gateway.btn-pay.razorpay', compact('output'));
    }

    /**
     * Create order for receive payment
     */
    public function razorpayCreateOrder($request_data, $output = null)
    {
        if($output == null) $output = $this->output;

        $endpoint = $this->razorpay_api_base_url . $this->razorpay_api_v1 . "/orders";

        $request_credentials = $this->getRazorpayRequestCredentials($output);

        $key_id = $request_credentials->key_id;
        $secret_key = $request_credentials->secret_key;

        $response = Http::withBasicAuth($key_id, $secret_key)->withHeaders([
            'Content-Type' => 'application/json',
        ])->post($endpoint, $request_data)->throw(function(Response $response, RequestException $exception) {
            $response_body = json_decode(json_encode($response->json()), true);
            throw new Exception($response_body['error']['description'] ?? "");
        })->json();

        return $response;
    }

    public function createRazorpayPaymentLink($output, $request_credentials) 
    {
        $endpoint = $this->razorpay_api_base_url . $this->razorpay_api_v1 . "/payment_links";

        $key_id = $request_credentials->key_id;
        $secret_key = $request_credentials->secret_key;

        $temp_record_token = generate_unique_string('temporary_datas','identifier',35);
        $this->setUrlParams("token=" . $temp_record_token); // set Parameter to URL for identifying when return success/cancel

        $redirection = $this->getRedirection();
        $url_parameter = $this->getUrlParams();

        $user = auth()->guard(get_auth_guard())->user();

        $temp_data = $this->razorPayJunkInsert($temp_record_token); // create temporary information

        $response = Http::withBasicAuth($key_id, $secret_key)->withHeaders([
            'Content-Type' => 'application/json',
        ])->post($endpoint, [
            'amount' => ceil($output['amount']->total_amount) * 100,
            'currency' => $output['currency']->currency_code,
            'expire_by' => now()->addMinutes(20)->timestamp,
            'reference_id' => $temp_record_token,
            'description' => 'Add Money',
            'customer' => [
                'name' => $user->firstname ?? "",
                'email' => $user->email ?? "",
            ],
            'notify' => [
                'sms' => false,
                'email' => true,
            ],
            'reminder_enable' => true,
            'callback_url' => $this->setGatewayRoute($redirection['return_url'],PaymentGatewayConst::RAZORPAY,$url_parameter),
            'callback_method' => 'get',
        ])->throw(function(Response $response, RequestException $exception) use ($temp_data) {
            $response_body = json_decode(json_encode($response->json()), true);
            $temp_data->delete();
            throw new Exception($response_body['error']['description'] ?? "");
        })->json();

        $response_array = json_decode(json_encode($response), true);

        $temp_data_contains = json_decode(json_encode($temp_data->data),true);
        $temp_data_contains['response'] = $response_array;

        $temp_data->update([
            'data'  => $temp_data_contains,
        ]);

        // make api response
        if(request()->expectsJson()) {
            $this->output['redirection_response']   = $response_array;
            $this->output['redirect_links']         = [];
            $this->output['redirect_url']           = $response_array['short_url'];
            return $this->get();
        }

        return redirect()->away($response_array['short_url']);
    }

    public function razorPayJunkInsert($temp_token) 
    {
        $output = $this->output;

        $this->setUrlParams("token=" . $temp_token);
        $redirection = $this->getRedirection();
        $url_parameter = $this->getUrlParams();
        $data = [
            'gateway'       => $output['gateway']->id,
            'currency'      => $output['currency']->id,
            'amount'        => json_decode(json_encode($output['amount']),true),
            'wallet_table'  => $output['wallet']->getTable(),
            'wallet_id'     => $output['wallet']->id,
            'creator_table' => auth()->guard(get_auth_guard())->user()->getTable(),
            'creator_id'    => auth()->guard(get_auth_guard())->user()->id,
            'creator_guard' => get_auth_guard(),
            'callback_url'  => $this->setGatewayRoute($redirection['return_url'],PaymentGatewayConst::RAZORPAY,$url_parameter),
            'cancel_url'    => $this->setGatewayRoute($redirection['cancel_url'],PaymentGatewayConst::RAZORPAY,$url_parameter),
        ];
        return TemporaryData::create([
            'type'          => PaymentGatewayConst::RAZORPAY,
            'identifier'    => $temp_token,
            'data'          => $data,
        ]);
    }

    public function getRazorpayCredentials($output)
    {
        $gateway = $output['gateway'] ?? null;
        if(!$gateway) throw new Exception("Payment gateway not available");

        $key_id             = ['public key','razorpay public key','key id','razorpay public', 'public'];
        $secret_key_sample  = ['secret','secret key','razorpay secret','razorpay secret key'];

        $key_id             = PaymentGateway::getValueFromGatewayCredentials($gateway,$key_id);
        $secret_key         = PaymentGateway::getValueFromGatewayCredentials($gateway,$secret_key_sample);
        
        $mode = $gateway->env;
        $gateway_register_mode = [
            PaymentGatewayConst::ENV_SANDBOX => PaymentGatewayConst::ENV_SANDBOX,
            PaymentGatewayConst::ENV_PRODUCTION => PaymentGatewayConst::ENV_PRODUCTION,
        ];

        if(array_key_exists($mode,$gateway_register_mode)) {
            $mode = $gateway_register_mode[$mode];
        }else {
            $mode = PaymentGatewayConst::ENV_SANDBOX;
        }

        $credentials = (object) [
            'key_id'                    => $key_id,
            'secret_key'                => $secret_key,
            'mode'                      => $mode
        ];

        $this->razorpay_gateway_credentials = $credentials;

        return $credentials;
    }

    public function getRazorpayRequestCredentials($output = null) 
    {
        if(!$this->razorpay_gateway_credentials) $this->getRazorpayCredentials($output);
        $credentials = $this->razorpay_gateway_credentials;
        if(!$output) $output = $this->output;

        $request_credentials = [];
        $request_credentials['key_id']          = $credentials->key_id;
        $request_credentials['secret_key']      = $credentials->secret_key;

        $this->request_credentials = (object) $request_credentials;
        
        return (object) $request_credentials;
    }

    public function isRazorpay($gateway) 
    {
        $search_keyword = ['razorpay','razorpay gateway','gateway razorpay','razorpay payment gateway'];
        $gateway_name = $gateway->name;

        $search_text = Str::lower($gateway_name);
        $search_text = preg_replace("/[^A-Za-z0-9]/","",$search_text);
        foreach($search_keyword as $keyword) {
            $keyword = Str::lower($keyword);
            $keyword = preg_replace("/[^A-Za-z0-9]/","",$keyword);
            if($keyword == $search_text) {
                return true;
                break;
            }
        }
        return false;
    }
    /**
     * Razorpay Success Response
     */
    public function razorpaySuccess($output) 
    {
        
        $reference              = $output['tempData']['identifier'];
        $order_info             = $output['tempData']['data']->razorpay_order ?? false;
        $output['callback_ref'] = $reference;

        if($order_info == false) {
            throw new Exception("Invalid Order");
        }

        $redirect_response = $output['tempData']['data']->callback_data ?? false;
        if($redirect_response == false) {
            throw new Exception("Invalid response");
        }

        if(isset($redirect_response->razorpay_payment_id) && isset($redirect_response->razorpay_order_id) && isset($redirect_response->razorpay_signature)) {
           
            // Response Data
            $output['capture']      = $output['tempData']['data']->callback_data ?? "";

            $gateway_credentials = $this->getRazorpayRequestCredentials($output);

            // Need to verify payment signature
            $request_order_id       = $order_info->id; // database order 
            $razorpay_payment_id    = $redirect_response->razorpay_payment_id; // response payment id
            $key_secret             = $gateway_credentials->secret_key;

            $generated_signature = hash_hmac("sha256", $request_order_id . "|" . $razorpay_payment_id, $key_secret);

            if($generated_signature == $redirect_response->razorpay_signature) {
 
                if(!$this->searchWithReferenceInTransaction($reference)) {
                   
                    try{
                        $transaction_response = $this->createTransaction($output);
                        
                    }catch(Exception $e) {
                         
                        throw new Exception($e->getMessage());
                    }
                    
                    return $transaction_response;
                }else{
                    $transaction    = Transaction::where('callback_ref',$reference)->first();
                    return $transaction->trx_id;
                }

            }else {
                 
                throw new Exception("Payment Failed, Invalid Signature Found");
            }
            
        }
     
    }

    /**
     * Razorpay Callback Response
     */
    public function razorpayCallbackResponse($response_data, $gateway){

        $entity = $response_data['entity'] ?? false;
        $event  = $response_data['event'] ?? false;

        if($entity == "event" && $event == "order.paid") { // order response event data is valid
            // get the identifier
            $token = $response_data['payload']['order']['entity']['receipt'] ?? "";

            $temp_data = TemporaryData::where('identifier', $token)->first();

            // if transaction is already exists need to update status, balance & response data
            $transaction = Transaction::where('callback_ref', $temp_data->identifier)->first();

            $status = PaymentGatewayConst::STATUSSUCCESS;

            if($temp_data) {
                $gateway_currency_id = $temp_data->data->currency ?? null;
                $gateway_currency = PaymentGatewayCurrency::find($gateway_currency_id);
                if($gateway_currency) {

                    $requested_amount = $temp_data->data->amount->requested_amount ?? 0;
                    $validator_data = [
                        $this->currency_input_name  => $gateway_currency->alias,
                        $this->amount_input         => $requested_amount
                    ];

                    $user    = User::where('id',$temp_data->data->creator_id)->first();
                    $this->predefined_guard = $user->modelGuardName();;
                    $this->predefined_user = $user;

                    $this->output['tempData'] = $temp_data;
                }
                $this->request_data = $validator_data;
                $this->gateway();
            }

            $output                     = $this->output;
            $output['callback_ref']     = $token;
            $output['capture']          = $response_data;
            if($transaction && $transaction->status != PaymentGatewayConst::STATUSSUCCESS) {
                $update_data                        = json_decode(json_encode($transaction->details), true);
                $update_data['gateway_response']    = $response_data;
                // update information
                $transaction->update([
                    'status'    => $status,
                    'details'   => $update_data
                ]);
            }else {
                // create new transaction with success
                $this->createTransaction($output);
            }
          
            logger("Transaction Created Successfully");
        }
    }
}

• [F] Flutterwave.php
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• [F] Paypal.php
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• [F] PaystackGateway.php
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• [F] Razorpay.php
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• [F] SslCommerz.php
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• [F] Stripe.php
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About Section

About NFC Pay: Our Story and Mission

NFC Pay was founded with a vision to transform the way people handle transactions. Our journey is defined by a commitment to innovation, security, and convenience. We strive to deliver seamless, user-friendly payment solutions that make everyday transactions effortless and secure. Our mission is to empower you to pay with ease and confidence, anytime, anywhere.

• Simplifying Payments, One Tap at a Time.
• Reinventing Your Wallet for Modern Convenience.
• Smart Payments for a Effortless Lifestyle.
• Experience the Ease of Tap and Pay.
• Innovative Solutions for Your Daily Transactions.

FAQ Section

Frequently Asked Questions About NFC Pay

Here are answers to some common questions about NFC Pay. We aim to provide clear and concise information to help you understand how our platform works and how it can benefit you. If you have any further inquiries, please don’t hesitate to contact our support team.

How do I register for NFC Pay?

Download the app and sign up using your email or phone number, then complete the verification process.

Is my payment information secure?

Yes, we use advanced encryption and security protocols to protect your payment details.

Can I add multiple cards to my NFC Pay wallet?

Absolutely, you can link multiple debit or credit cards to your wallet.

How do I transfer money to another user?

Go to the transfer section, select the recipient, enter the amount, and authorize the transfer.

What should I do if I forget my PIN?

Use the “Forgot PIN” feature in the app to reset it following the provided instructions.

How can I activate my merchant account?

Sign up for a merchant account through the app and follow the setup instructions to start accepting payments.

Can I track my payment status?

Yes, you can view and track your payment status in the account dashboard