<?php

namespace App\Http\Controllers\Api;

use App\Http\Controllers\Controller;
use App\Models\PaymentTransaction;
use App\Models\ShoppingOrder;
use App\Models\ShoppingPayment;
use App\Services\MyLog;
use App\Services\Payment;
use App\Services\ShoppingUserService;
use App\Services\Util;

class PayoneController extends Controller
{
    public function __construct() {}

    public function paymentStatus()
    {

        $data = \Request::all();
        // test para

        /*   $data = [
              'key' => '698fb2555f8b2efc74f60b2121421f45',
              'txaction' => 'paid',
              'clearingtype' => 'wlt',
              'userid' => '158723953',
              'txid' => '321623031',
              'price' => '89.00',
              'param' => '1', //$this->shopping_order->id,
              'reference' => '15c83aee2766c3',
          ];

      */

        if (! isset($data['key']) || ! isset($data['param']) || ! isset($data['userid']) || ! isset($data['txid']) || ! isset($data['reference']) || ! isset($data['price'])) {
            MyLog::writeLog(
                'payone',
                'error',
                'Error:2001 App\Http\Controllers\Api\PayoneController::paymentStatus parameter incomplete',
                $data
            );
            echo 'TSOK';
            exit;
        }

        if ($data['key'] != config('payone.defaults.key')) {
            MyLog::writeLog(
                'payone',
                'error',
                'Error:2002 App\Http\Controllers\Api\PayoneController::paymentStatus Key error',
                $data
            );
            echo 'TSOK';
            exit;
        }

        $shopping_order = ShoppingOrder::find($data['param']);
        if (! $shopping_order) {
            MyLog::writeLog(
                'payone',
                'error',
                'Error:2003 App\Http\Controllers\Api\PayoneController::paymentStatus ShoppingOrder not found:',
                $data
            );
            echo 'TSOK';
            exit;
        }

        $shopping_payment = ShoppingPayment::where('reference', $data['reference'])->first();
        if (! $shopping_payment) {
            MyLog::writeLog(
                'payone',
                'error',
                'Error:2004 App\Http\Controllers\Api\PayoneController::paymentStatus ShoppingPayment not found',
                $data
            );
            echo 'TSOK';
            exit;
        }

        if ($shopping_payment->shopping_order_id != $shopping_order->id) {
            MyLog::writeLog(
                'payone',
                'error',
                'Error:2005 App\Http\Controllers\Api\PayoneController::paymentStatus ShoppingPayment no realation ShoppingOrder',
                $data
            );
            echo 'TSOK';
            exit;
        }

        $price = number_format((round($data['price'], 2) * 100), 0, '.', '');
        $price_amount = number_format($shopping_payment->amount, 0, '.', '');
        if ($price_amount != $price) {
            $data['shopping_payment-amount'] = $price_amount;
            $data['price-amount'] = $price;
            MyLog::writeLog(
                'payone',
                'error',
                'Error:2006 App\Http\Controllers\Api\PayoneController::paymentStatus Price error',
                $data
            );
            echo 'TSOK';
            exit;
        }
        /*
         * Payone sendet dieselbe txaction oft mehrfach (v. a. "appointed"). War der Status
         * bereits auf ShoppingPayment gespeichert, ist das ein Duplikat: TSOK, keine Doppel-Verarbeitung.
         * Ausnahme: erneutes "paid", obwohl die Bestellung noch nicht als bezahlt gefuehrt wird (Recovery).
         */
        if ($shopping_payment->txaction == $data['txaction']) {
            if ($data['txaction'] === 'paid' && $shopping_order->txaction === 'paid') {
                MyLog::writeLog(
                    'payone',
                    'notice',
                    'App\Http\Controllers\Api\PayoneController::paymentStatus duplicate callback ignored (already paid)',
                    $data,
                    false
                );
                echo 'TSOK';
                exit;
            }

            if (in_array($data['txaction'], ['appointed', 'failed', 'pending'], true)) {
                MyLog::writeLog(
                    'payone',
                    'info',
                    'App\Http\Controllers\Api\PayoneController::paymentStatus duplicate callback ignored (same txaction)',
                    [
                        'reference' => $data['reference'] ?? null,
                        'param' => $data['param'] ?? null,
                        'txaction' => $data['txaction'],
                        'txid' => $data['txid'] ?? null,
                    ],
                    false
                );
                echo 'TSOK';
                exit;
            }
        }

        // create transaction
        PaymentTransaction::create([
            'shopping_payment_id' => $shopping_payment->id,
            'request' => 'transaction',
            'txid' => $data['txid'],
            'userid' => $data['userid'],
            'status' => 'PAYONE',
            'key' => $data['key'],
            'txaction' => $data['txaction'],
            'transmitted_data' => Util::utf8ize($data),
            'mode' => $data['mode'],
        ]);

        // Define txaction priority (higher number = higher priority)
        $txaction_priority = [
            'appointed' => 1,
            'pending' => 2,
            'failed' => 3,
            'paid' => 10, // highest priority - final state
        ];

        $current_priority = isset($txaction_priority[$shopping_order->txaction]) ? $txaction_priority[$shopping_order->txaction] : 0;
        $new_priority = isset($txaction_priority[$data['txaction']]) ? $txaction_priority[$data['txaction']] : 0;

        // Only update txaction if new priority is higher than current
        if ($new_priority > $current_priority) {
            $shopping_order->txaction = $data['txaction'];
            $shopping_order->save();
            $shopping_payment->txaction = $data['txaction'];
            $shopping_payment->save();
        } else {
            MyLog::writeLog(
                'payone',
                'info',
                'App\Http\Controllers\Api\PayoneController::paymentStatus - txaction not updated (current: '.$shopping_order->txaction.' has higher/equal priority than new: '.$data['txaction'].')',
                $data,
                false
            );
        }

        $send_link = false;
        $send_mail = true;
        if ($data['txaction'] === 'failed') {
            $shopping_order->setUserHistoryValue(['status' => 6]);
            Util::setInstanceStatusByPayment($shopping_payment, 5);
        }
        if ($data['txaction'] === 'appointed') {
            $shopping_order->setUserHistoryValue(['status' => 7]);
            ShoppingUserService::snycOrdersByShoppingOrder($shopping_order);
            Util::setInstanceStatusByPayment($shopping_payment, 4);
        }

        if ($data['txaction'] === 'paid') {
            // Use DB transaction and row locking to prevent race conditions
            \DB::beginTransaction();
            try {
                // Lock the shopping order row to prevent concurrent processing
                $locked_order = ShoppingOrder::where('id', $shopping_order->id)
                    ->lockForUpdate()
                    ->first();
                // Double-check if payment was already processed
                if (! $locked_order->paid) {
                    $send_link = Payment::paymentStatusPaidAction($locked_order, true, $shopping_payment);
                    \DB::commit();
                } else {
                    $send_mail = false;
                    \DB::commit();
                }
            } catch (\Exception $e) {
                \DB::rollBack();
                MyLog::writeLog(
                    'payone',
                    'error',
                    'Error:2008 App\Http\Controllers\Api\PayoneController::paymentStatus Transaction failed',
                    ['error' => $e->getMessage(), 'data' => $data]
                );
                throw $e;
            }
        }

        $data['send_link'] = $send_link;
        if ($send_mail) {
            Payment::paymentStatusSendMail($shopping_order, $shopping_payment, $data);
        }
        echo 'TSOK';
        exit;
    }
}