<?php

namespace Modules\PaymentModule\Http\Controllers;

use Illuminate\Http\Request;
use Illuminate\Routing\Controller;
use Illuminate\Support\Facades\Config;
use Illuminate\Support\Str;

class PaytmController extends Controller
{
    public function __construct() {
        $config = business_config('paytm', 'payment_config');
        if (!is_null($config) && $config->mode == 'live') {
            $paytm = $config->live_values;
        } elseif (!is_null($config) && $config->mode == 'test') {
            $paytm = $config->test_values;
        }

        if (isset($paytm)) {

            $PAYTM_STATUS_QUERY_NEW_URL='https://securegw-stage.paytm.in/merchant-status/getTxnStatus';
            $PAYTM_TXN_URL='https://securegw-stage.paytm.in/theia/processTransaction';
            if (env('APP_MODE') == 'live') {
                $PAYTM_STATUS_QUERY_NEW_URL='https://securegw.paytm.in/merchant-status/getTxnStatus';
                $PAYTM_TXN_URL='https://securegw.paytm.in/theia/processTransaction';
            }

            $config = array(
                'PAYTM_ENVIRONMENT' => (env('APP_MODE')=='live')?'PROD':'TEST',
                'PAYTM_MERCHANT_KEY' => env('PAYTM_MERCHANT_KEY', $paytm['merchant_key']),
                'PAYTM_MERCHANT_MID' => env('PAYTM_MERCHANT_MID', $paytm['merchant_id']),
                'PAYTM_MERCHANT_WEBSITE' => env('PAYTM_MERCHANT_WEBSITE', $paytm['merchant_website_link']),
                'PAYTM_REFUND_URL' => env('PAYTM_REFUND_URL', $paytm['refund_url']??''),
                'PAYTM_STATUS_QUERY_URL' => env('PAYTM_STATUS_QUERY_URL', $PAYTM_STATUS_QUERY_NEW_URL),
                'PAYTM_STATUS_QUERY_NEW_URL' => env('PAYTM_STATUS_QUERY_NEW_URL', $PAYTM_STATUS_QUERY_NEW_URL),
                'PAYTM_TXN_URL' => env('PAYTM_TXN_URL', $PAYTM_TXN_URL),
            );

            //config_paytm
            Config::set('paytm_config', $config);
        }
    }



    function encrypt_e($input, $ky)
    {
        $key = html_entity_decode($ky);
        $iv = "@@@@&&&&####$$$$";
        $data = openssl_encrypt($input, "AES-128-CBC", $key, 0, $iv);
        return $data;
    }

    function decrypt_e($crypt, $ky)
    {
        $key = html_entity_decode($ky);
        $iv = "@@@@&&&&####$$$$";
        $data = openssl_decrypt($crypt, "AES-128-CBC", $key, 0, $iv);
        return $data;
    }

    function generateSalt_e($length)
    {
        $random = "";
        srand((double)microtime() * 1000000);

        $data = "AbcDE123IJKLMN67QRSTUVWXYZ";
        $data .= "aBCdefghijklmn123opq45rs67tuv89wxyz";
        $data .= "0FGH45OP89";

        for ($i = 0; $i < $length; $i++) {
            $random .= substr($data, (rand() % (strlen($data))), 1);
        }

        return $random;
    }

    function checkString_e($value)
    {
        if ($value == 'null')
            $value = '';
        return $value;
    }

    function getChecksumFromArray($arrayList, $key, $sort = 1)
    {
        if ($sort != 0) {
            ksort($arrayList);
        }
        $str = $this->getArray2Str($arrayList);
        $salt = $this->generateSalt_e(4);
        $finalString = $str . "|" . $salt;
        $hash = hash("sha256", $finalString);
        $hashString = $hash . $salt;
        $checksum = $this->encrypt_e($hashString, $key);
        return $checksum;
    }

    function getChecksumFromString($str, $key)
    {

        $salt = $this->generateSalt_e(4);
        $finalString = $str . "|" . $salt;
        $hash = hash("sha256", $finalString);
        $hashString = $hash . $salt;
        $checksum = $this->encrypt_e($hashString, $key);
        return $checksum;
    }

    function verifychecksum_e($arrayList, $key, $checksumvalue)
    {
        $arrayList = $this->removeCheckSumParam($arrayList);
        ksort($arrayList);
        $str = $this->getArray2StrForVerify($arrayList);
        $paytm_hash = $this->decrypt_e($checksumvalue, $key);
        $salt = substr($paytm_hash, -4);

        $finalString = $str . "|" . $salt;

        $website_hash = hash("sha256", $finalString);
        $website_hash .= $salt;

        $validFlag = "FALSE";
        if ($website_hash == $paytm_hash) {
            $validFlag = "TRUE";
        } else {
            $validFlag = "FALSE";
        }
        return $validFlag;
    }

    function verifychecksum_eFromStr($str, $key, $checksumvalue)
    {
        $paytm_hash = $this->decrypt_e($checksumvalue, $key);
        $salt = substr($paytm_hash, -4);

        $finalString = $str . "|" . $salt;

        $website_hash = hash("sha256", $finalString);
        $website_hash .= $salt;

        $validFlag = "FALSE";
        if ($website_hash == $paytm_hash) {
            $validFlag = "TRUE";
        } else {
            $validFlag = "FALSE";
        }
        return $validFlag;
    }

    function getArray2Str($arrayList)
    {
        $findme = 'REFUND';
        $findmepipe = '|';
        $paramStr = "";
        $flag = 1;
        foreach ($arrayList as $key => $value) {
            $pos = strpos($value, $findme);
            $pospipe = strpos($value, $findmepipe);
            if ($pos !== false || $pospipe !== false) {
                continue;
            }

            if ($flag) {
                $paramStr .= $this->checkString_e($value);
                $flag = 0;
            } else {
                $paramStr .= "|" . $this->checkString_e($value);
            }
        }
        return $paramStr;
    }

    function getArray2StrForVerify($arrayList)
    {
        $paramStr = "";
        $flag = 1;
        foreach ($arrayList as $key => $value) {
            if ($flag) {
                $paramStr .= $this->checkString_e($value);
                $flag = 0;
            } else {
                $paramStr .= "|" . $this->checkString_e($value);
            }
        }
        return $paramStr;
    }

    function redirect2PG($paramList, $key)
    {
        $hashString = $this->getchecksumFromArray($paramList);
        $checksum = $this->encrypt_e($hashString, $key);
    }

    function removeCheckSumParam($arrayList)
    {
        if (isset($arrayList["CHECKSUMHASH"])) {
            unset($arrayList["CHECKSUMHASH"]);
        }
        return $arrayList;
    }

    function getTxnStatus($requestParamList)
    {
        return $this->callAPI("PAYTM_STATUS_QUERY_URL", $requestParamList);
    }

    function getTxnStatusNew($requestParamList)
    {
        return $this->callNewAPI("PAYTM_STATUS_QUERY_NEW_URL", $requestParamList);
    }

    function initiateTxnRefund($requestParamList)
    {
        $CHECKSUM = $this->getRefundChecksumFromArray($requestParamList, "PAYTM_MERCHANT_KEY", 0);
        $requestParamList["CHECKSUM"] = $CHECKSUM;
        return $this->callAPI("PAYTM_REFUND_URL", $requestParamList);
    }

    function callAPI($apiURL, $requestParamList)
    {
        $jsonResponse = "";
        $responseParamList = array();
        $JsonData = json_encode($requestParamList);
        $postData = 'JsonData=' . urlencode($JsonData);
        $ch = curl_init($apiURL);
        curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST");
        curl_setopt($ch, CURLOPT_POSTFIELDS, $postData);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
        curl_setopt($ch, CURLOPT_HTTPHEADER, array(
                'Content-Type: application/json',
                'Content-Length: ' . strlen($postData))
        );
        $jsonResponse = curl_exec($ch);
        $responseParamList = json_decode($jsonResponse, true);
        return $responseParamList;
    }

    function callNewAPI($apiURL, $requestParamList)
    {
        $jsonResponse = "";
        $responseParamList = array();
        $JsonData = json_encode($requestParamList);
        $postData = 'JsonData=' . urlencode($JsonData);
        $ch = curl_init($apiURL);
        curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST");
        curl_setopt($ch, CURLOPT_POSTFIELDS, $postData);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
        curl_setopt($ch, CURLOPT_HTTPHEADER, array(
                'Content-Type: application/json',
                'Content-Length: ' . strlen($postData))
        );
        $jsonResponse = curl_exec($ch);
        $responseParamList = json_decode($jsonResponse, true);
        return $responseParamList;
    }

    function getRefundChecksumFromArray($arrayList, $key, $sort = 1)
    {
        if ($sort != 0) {
            ksort($arrayList);
        }
        $str = $this->getRefundArray2Str($arrayList);
        $salt = $this->generateSalt_e(4);
        $finalString = $str . "|" . $salt;
        $hash = hash("sha256", $finalString);
        $hashString = $hash . $salt;
        $checksum = $this->encrypt_e($hashString, $key);
        return $checksum;
    }

    function getRefundArray2Str($arrayList)
    {
        $findmepipe = '|';
        $paramStr = "";
        $flag = 1;
        foreach ($arrayList as $key => $value) {
            $pospipe = strpos($value, $findmepipe);
            if ($pospipe !== false) {
                continue;
            }

            if ($flag) {
                $paramStr .= $this->checkString_e($value);
                $flag = 0;
            } else {
                $paramStr .= "|" . $this->checkString_e($value);
            }
        }
        return $paramStr;
    }

    function callRefundAPI($refundApiURL, $requestParamList)
    {
        $jsonResponse = "";
        $responseParamList = array();
        $JsonData = json_encode($requestParamList);
        $postData = 'JsonData=' . urlencode($JsonData);
        $ch = curl_init($refundApiURL);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
        curl_setopt($ch, CURLOPT_URL, $refundApiURL);
        curl_setopt($ch, CURLOPT_POST, true);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $postData);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        $headers = array();
        $headers[] = 'Content-Type: application/json';
        curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
        $jsonResponse = curl_exec($ch);
        $responseParamList = json_decode($jsonResponse, true);
        return $responseParamList;
    }

    //payment functions
    public function payment(Request $request)
    {
        $user = $request->user;
        $value = cart_total($request->user->id);

        $paramList = array();
        $ORDER_ID = '';
        $CUST_ID = $user['id'];
        $INDUSTRY_TYPE_ID = $request["INDUSTRY_TYPE_ID"];
        $CHANNEL_ID = $request["CHANNEL_ID"];
        $TXN_AMOUNT = round($value, 2);

        // Create an array having all required parameters for creating checksum.
        $paramList["MID"] = Config::get('paytm_config.PAYTM_MERCHANT_MID');
        $paramList["ORDER_ID"] = $ORDER_ID;
        $paramList["CUST_ID"] = $CUST_ID;
        $paramList["INDUSTRY_TYPE_ID"] = $INDUSTRY_TYPE_ID;
        $paramList["CHANNEL_ID"] = $CHANNEL_ID;
        $paramList["TXN_AMOUNT"] = $TXN_AMOUNT;
        $paramList["WEBSITE"] = Config::get('paytm_config.PAYTM_MERCHANT_WEBSITE');

        $paramList["CALLBACK_URL"] = route('paytm.response');
        $paramList["MSISDN"] = $user['phone']; //Mobile number of customer
        $paramList["EMAIL"] = $user['email']; //Email ID of customer
        $paramList["VERIFIED_BY"] = "EMAIL"; //
        $paramList["IS_USER_VERIFIED"] = "YES"; //


        //Here checksum string will return by getChecksumFromArray() function.
        $checkSum = $this->getChecksumFromArray($paramList, Config::get('paytm_config.PAYTM_MERCHANT_KEY'));
        return view('paymentmodule::paytm', compact('checkSum', 'paramList'));
    }

    public function callback(Request $request)
    {
        $paramList = $_POST;
        $paytmChecksum = isset($_POST["CHECKSUMHASH"]) ? $_POST["CHECKSUMHASH"] : ""; //Sent by Paytm pg

        //Verify all parameters received from Paytm pg to your application. Like MID received from paytm pg is same as your application’s MID, TXN_AMOUNT and ORDER_ID are same as what was sent by you to Paytm PG for initiating transaction etc.
        $isValidChecksum = $this->verifychecksum_e($paramList, Config::get('paytm_config.PAYTM_MERCHANT_KEY'), $paytmChecksum); //will return TRUE or FALSE string.

        if ($isValidChecksum == "TRUE") {
            if ($request["STATUS"] == "TXN_SUCCESS") {
                $tran_id = Str::random(6) . '-' . rand(1, 1000);;
                $request['payment_method'] = 'paytm';
                $response = place_booking_request($request->user->id, $request, $tran_id);

                if ($response['flag'] == 'success') {
                    if ($request->has('callback')) {
                        return redirect($request['callback'].'?payment_status=success');
                    } else {
                        return response()->json(response_formatter(DEFAULT_200), 200);
                    }
                }
            }
        }

        if ($request->has('callback')) {
            return redirect($request['callback'].'?payment_status=fail');
        } else {
            return response()->json(response_formatter(DEFAULT_204), 200);
        }
    }
}
