<?php

namespace Modules\WTIALaCarte\Http\Controllers;


use Illuminate\Http\Request;
use Illuminate\Routing\Controller;
use Modules\WTIALaCarte\Entities\Alacarte;
use Modules\WTIALaCarte\Entities\AlacarteOrder;
use Modules\WTIALaCarte\Entities\AlacarteOrderItem;
use Modules\Subscription\Entities\SubscriptionCoupon;
use Modules\Subscription\Entities\SubscriptionCouponRedemption;
use Modules\Subscription\Entities\UserCredit;
use Modules\Subscription\Entities\UserCreditHistory;
use Modules\WTIALaCarte\Services\PaypalService;
use Modules\Customer\Services\CustomerService;
use Carbon\Carbon;
use Stripe;
use Exception;
use Log;

class PaypalWebhookController extends Controller
{

    protected $paypal;
    protected $customerService;

    public function __construct(CustomerService  $customerService){
        $this->paypal = new PaypalService();
        $this->customerService = $customerService;
    }

    protected function isValidWebhook()
    {
        // get request headers
        $headers = apache_request_headers();
        Log::info($headers);

        // get http payload
        $body = file_get_contents('php://input');

        $webhook_id = '6V2767039S933004S'; //live

        $data =
            $headers['PAYPAL-TRANSMISSION-ID'] . '|' .
            $headers['PAYPAL-TRANSMISSION-TIME'] . '|' .
            $webhook_id . '|' . crc32($body);


        // load certificate and extract public key
        $pubKey = openssl_pkey_get_public(file_get_contents($headers['PAYPAL-CERT-URL']));
        $key = openssl_pkey_get_details($pubKey)['key'];

        // verify data against provided signature 
        $result = openssl_verify(
            $data,
            base64_decode($headers['PAYPAL-TRANSMISSION-SIG']),
            $key,
            'sha256WithRSAEncryption'
        );


        if ($result == 1) {
            // webhook notification is verified
            Log::info('webhook verified');
            return true;
        } elseif ($result == 0) {
            // webhook notification is NOT verified
            Log::info('webhook not verified');
            return false;
        } else {
            // there was an error verifying this
            Log::info('webhook verification error');
            return false;
        }
    }
    
    public function webhook(Request $request) {

        // Verify that the webhook is authentic
        if (!$this->isValidWebhook()) {
            Log::error('Received invalid webhook');
            return response('Invalid webhook', 400);
            exit();
        }

        // Get the webhook data from the request
        $webhookData = $request->all();
        $event_type = $webhookData["event_type"];

        Log::info($webhookData); 

        if($event_type == 'CHECKOUT.ORDER.APPROVED'){

            try {

                $total = 0;
                $user_id = null;
                $coupon_id = null;
                foreach ($webhookData['resource']['purchase_units'] as $key => $purchase_unit) {
                    $total += (float) $purchase_unit['amount']['value'];
                    $custom_data = json_decode($purchase_unit['custom_id']);
                    $user_id = $custom_data->user_id;
                    if(isset($custom_data->coupon_id)){
                        $coupon_id = $custom_data->coupon_id;
                    }
                }

                $alacarte_order = AlacarteOrder::create([
                    'order_number' => rand(11, 99).date('ymdhis'),
                    'user_id' => $user_id,
                    'paypal_order_id' => $webhookData['resource']['id'],
                    'total' => $total * 100,
                    'status' => 'waiting for payment'
                ]);


                if($coupon_id != null){
                    $coupon = SubscriptionCoupon::find((int)$coupon_id);
                    if($coupon){
                        $coupon_redemption = new SubscriptionCouponRedemption;
                        $coupon_redemption->subscription_coupon_id = $coupon->id;
                        $coupon_redemption->customer_id = $alacarte_order->user_id;
                        $coupon_redemption->alacarte_order_id = $alacarte_order->id;
                        $coupon_redemption->save();
                    }
                }

                $user_credits = UserCredit::firstOrCreate(['user_id' => $user_id]);

                $captureResponse = $this->paypal->capturePayment($webhookData['resource']['id']);
                if($captureResponse->status == 'COMPLETED'){

                    $alacarte_order->status = 'paid';
                    $alacarte_order->save();

                    Log::info($captureResponse->purchase_units); 

                    foreach ($captureResponse->purchase_units as $key => $purchase_unit) {

                        $alacarte = Alacarte::with('category')->where('id',(int)$purchase_unit->reference_id)->first();
                        if($alacarte){

                            $capture_data = $purchase_unit->payments->captures[0];
                            $custom_data = json_decode($capture_data->custom_id);
                            $quantity = $custom_data->quantity;
                            $discount = $custom_data->discount;
                            $total_price = $capture_data->amount->value;


                            $alacarte_order->items()->create([
                                'alacarte_id' => $alacarte->id,
                                'price' => ($total_price / $quantity) + $discount,
                                'quantity' =>  $quantity,
                                'discount' => ($discount * $quantity) * 100,
                                'total' => $total_price * 100,
                            ]);

                            if($capture_data->status == 'COMPLETED'){

                                Log::info('Updating user credits');

                                $before_credits = $this->customerService->credits($user_credits->user_id);
                                $user_credits->alacarte_credits = $user_credits->alacarte_credits + ($alacarte->credits * $quantity);
                                $user_credits->save();
                                $after_credits = $this->customerService->credits($user_credits->user_id);

                                $user_credits_history = new UserCreditHistory;
                                $user_credits_history->user_id = $user_credits->user_id;
                                $user_credits_history->subscription_credits_from = $before_credits['total_available_credits']['subscription'];
                                $user_credits_history->subscription_credits_to =  $after_credits['total_available_credits']['subscription'];
                                $user_credits_history->alacarte_credits_from = $before_credits['total_available_credits']['alacarte'];;
                                $user_credits_history->alacarte_credits_to = $after_credits['total_available_credits']['alacarte'];
                                $user_credits_history->details = 'Added '.$quantity.'X '.$alacarte->name;
                                $user_credits_history->save();

                                
                            }
                        }
                    }

                } else {
                    Log::info('Capture Payment Failed'); 
                }

            } catch(\Exception $e) {
                Log::info($e->getMessage()); 
                http_response_code(400);
                exit();
            }

        } else {
           Log::info($webhookData); 
        }
    }

}