<?php

namespace App\Http\Controllers\Payment\product;

use App\Http\Controllers\Payment\product\PaymentController;
use App\BasicExtended;
use App\Http\Controllers\Controller;
use App\Language;
use App\OrderItem;
use App\PackageOrder;
use App\PaymentGateway;
use App\Product;
use App\ProductOrder;
use App\ShippingCharge;
use Carbon\Carbon;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Auth;
use Illuminate\Support\Facades\Session;
use PDF;
use PHPMailer\PHPMailer\Exception;
use PHPMailer\PHPMailer\PHPMailer;

class PaytmController extends PaymentController
{
    public function store(Request $request)
    {
        if (!Session::has('cart')) {
            return view('errors.404');
        }

        $cart = Session::get('cart');

        $total = $this->orderTotal($request->shipping_charge);

        // Validation Starts
        if (session()->has('lang')) {
            $currentLang = Language::where('code', session()->get('lang'))->first();
        } else {
            $currentLang = Language::where('is_default', 1)->first();
        }



        $bs = $currentLang->basic_setting;
        $be = $currentLang->basic_extended;
        $bex = $currentLang->basic_extra;

        $bex = $currentLang->basic_extra;
        if ($bex->base_currency_text != "INR") {
            return redirect()->back()->with('error', 'Please Select INR Currency For Paytm.');
        }

        if($this->orderValidation($request)) {
            return $this->orderValidation($request);
        }
        // Validation Ends

        $txnId = 'txn_' . \Str::random(8) . time();
        $chargeId = 'ch_' . \Str::random(9) . time();
        $order = $this->saveOrder($request, $txnId, $chargeId);
        $order_id = $order->id;

        $this->saveOrderedItems($order_id);


        $item_number = $order_id;
        $item_amount = $total;


        Session::put('item_number', $item_number);
        Session::put('order_id', $order_id);
        $data_for_request = $this->handlePaytmRequest($item_number, $item_amount);
        $paytm_txn_url = 'https://securegw-stage.paytm.in/theia/processTransaction';
        $paramList = $data_for_request['paramList'];
        $checkSum = $data_for_request['checkSum'];

        $be = BasicExtended::first();
        $version = $be->theme_version;

        if ($version == 'dark') {
            $version = 'default';
        }

        return view('front.paytm', compact('paytm_txn_url', 'paramList', 'checkSum', 'version'));
    }

    public function handlePaytmRequest($order_id, $amount)
    {
        $data = PaymentGateway::whereKeyword('paytm')->first();
        $paydata = $data->convertAutoData();

        // Load all functions of encdec_paytm.php and config-paytm.php
        $this->getAllEncdecFunc();
        // $this->getConfigPaytmSettings();
        $checkSum = "";
        $paramList = array();
        // Create an array having all required parameters for creating checksum.
        $paramList["MID"] = $paydata['merchant'];
        $paramList["ORDER_ID"] = $order_id;
        $paramList["CUST_ID"] = $order_id;
        $paramList["INDUSTRY_TYPE_ID"] = $paydata['industry'];
        $paramList["CHANNEL_ID"] = 'WEB';
        $paramList["TXN_AMOUNT"] = $amount;
        $paramList["WEBSITE"] = $paydata['website'];
        $paramList["CALLBACK_URL"] = route('product.paytm.notify');

        $paytm_merchant_key = $paydata['secret'];
        //Here checksum string will return by getChecksumFromArray() function.
        $checkSum = getChecksumFromArray($paramList, $paytm_merchant_key);
        return array(
            'checkSum' => $checkSum,
            'paramList' => $paramList
        );
    }

    function getAllEncdecFunc()
    {
        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 $data;
        }
        function pkcs5_pad_e($text, $blocksize)
        {
            $pad = $blocksize - (strlen($text) % $blocksize);
            return $text . str_repeat(chr($pad), $pad);
        }
        function pkcs5_unpad_e($text)
        {
            $pad = ord($text[
                strlen($text) - 1]);
            if ($pad > strlen($text))
                return false;
            return substr($text, 0, -1 * $pad);
        }
        function generateSalt_e($length)
        {
            $random = "";
            srand((float) 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);
            }
            $str = getArray2Str($arrayList);
            $salt = generateSalt_e(4);
            $finalString = $str . "|" . $salt;
            $hash = hash("sha256", $finalString);
            $hashString = $hash . $salt;
            $checksum = encrypt_e($hashString, $key);
            return $checksum;
        }
        function getChecksumFromString($str, $key)
        {
            $salt = generateSalt_e(4);
            $finalString = $str . "|" . $salt;
            $hash = hash("sha256", $finalString);
            $hashString = $hash . $salt;
            $checksum = encrypt_e($hashString, $key);
            return $checksum;
        }
        function verifychecksum_e($arrayList, $key, $checksumvalue)
        {
            $arrayList = removeCheckSumParam($arrayList);
            ksort($arrayList);
            $str = getArray2StrForVerify($arrayList);
            $paytm_hash = decrypt_e($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)
        {
            $paytm_hash = decrypt_e($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) {
                    $paramStr .= checkString_e($value);
                    $flag = 0;
                } else {
                    $paramStr .= "|" . checkString_e($value);
                }
            }
            return $paramStr;
        }
        function getArray2StrForVerify($arrayList)
        {
            $paramStr = "";
            $flag = 1;
            foreach ($arrayList as $key => $value) {
                if ($flag) {
                    $paramStr .= checkString_e($value);
                    $flag = 0;
                } else {
                    $paramStr .= "|" . checkString_e($value);
                }
            }
            return $paramStr;
        }
        function redirect2PG($paramList, $key)
        {
            $hashString = getchecksumFromArray($paramList, $key);
            $checksum = encrypt_e($hashString, $key);
        }
        function removeCheckSumParam($arrayList)
        {
            if (isset($arrayList["CHECKSUMHASH"])) {
                unset($arrayList["CHECKSUMHASH"]);
            }
            return $arrayList;
        }
        function getTxnStatus($requestParamList)
        {
            return callAPI(PAYTM_STATUS_QUERY_URL, $requestParamList);
        }
        function getTxnStatusNew($requestParamList)
        {
            return callNewAPI(PAYTM_STATUS_QUERY_NEW_URL, $requestParamList);
        }
        function initiateTxnRefund($requestParamList)
        {
            $CHECKSUM = getRefundChecksumFromArray($requestParamList, PAYTM_MERCHANT_KEY, 0);
            $requestParamList["CHECKSUM"] = $CHECKSUM;
            return 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);
            }
            $str = getRefundArray2Str($arrayList);
            $salt = generateSalt_e(4);
            $finalString = $str . "|" . $salt;
            $hash = hash("sha256", $finalString);
            $hashString = $hash . $salt;
            $checksum = encrypt_e($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) {
                    $paramStr .= checkString_e($value);
                    $flag = 0;
                } else {
                    $paramStr .= "|" . checkString_e($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;
        }
    }

    public function notify(Request $request)
    {
        // Send Mail to Buyer
        if (session()->has('lang')) {
            $currentLang = Language::where('code', session()->get('lang'))->first();
        } else {
            $currentLang = Language::where('is_default', 1)->first();
        }

        $be = $currentLang->basic_extended;

        if ('TXN_SUCCESS' === $request['STATUS']) {
            $orderid = Session::get('order_id');
            $po = ProductOrder::findOrFail($orderid);
            $po->payment_status = "Completed";
            $po->save();


            // Send Mail to Buyer
            $this->sendMails($po);

            Session::forget('invoice');
            Session::forget('order_id');

            session()->flash('success', 'Payment completed!');
            return redirect()->route('product.payment.return');
        } else if ('TXN_FAILURE' === $request['STATUS']) {
            //return view( 'payment-failed' );
            $po = PackageOrder::findOrFail(Session::get('item_number'));
            $po->delete();

            session()->flash('error', 'Something is wrong!');
            return redirect(route('product.payment.cancle'));
        }


    }
}
