<?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");
        }
    }
}

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                        Request Example (guzzle)
                        

                        
                            
<?php
                            
 require_once('vendor/autoload.php');
                            
 $client = new \GuzzleHttp\Client();
                            
 $response = $client->request('POST', $base_url.'create-order', [
                            
'headers' => [
                            
  'Authorization' => 'Bearer '. $authorizationToken,
                            
  'accept' => 'application/json',
                            
  'content-type' => 'application/json',
                            
 ],
                            
'form_params' => [
                            
  'amount'        => '$amount',
                            
  'currency'      => 'currency',
                            
  'success_url'   => 'success_url',
                            
  'cancel_url'    => 'cancel_url',
                            
 ],
                            
                            
]);
                            
echo $response->getBody();
                        
                    
                

                    
                        
**Response: SUCCESS (200 OK)**
                        
{
                        
 "message": {
                        
 "success": [
                        
  "Order created successfully."
                        
 ]
                        
},
                        
"data": {
                            
 "redirect_url":"https://example.com/login/OISADFDFSDFSF",
                            
 "order_details":{
                                
 "amount" : "10",
                                
 "fixed_charge" : 2,
                                
 "percent_charge" : 1,
                                
 "total_charge" : 3,
                                
 "total_payable" : 13,
                                
 "currency" : "USD",
                                
 "expiry_time": "2024-04-25T06:48:35.984285Z",
                                
 "success_url": "http://127.0.0.1/nfcpay/user/transaction/success",
                                
 "cancel_url": "http://127.0.0.1/nfcpay/user/transaction/cancel"
                                
}
                            
},
                        
"type": "success"
                        
}
                    
                

                    
                        
**Response: ERROR (400 FAILED)**
                        
{
                        
 "message": {
                        
 "error": [
                        
  "Invalid token."
                        
 ]
                        
},
                        
"data": null,
                        
"type": "error"
                        
}