<?php

namespace App\Http\Controllers;

use App\Models\Page;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Log;
use Illuminate\Support\Facades\Validator;

class PaymentController extends Controller
{
    public function process(Request $request)
    {
        $validator = Validator::make($request->all(), [
            'name' => 'required|string|max:255',
            'surname' => 'required|string|max:255',
            'email' => 'required|email|max:255',
            'phone' => 'required|string|max:20',
            'price' => 'required|numeric|min:1',
            'address' => 'required|string',
            'agreement' => 'accepted',
        ], [
            'name.required' => 'Lütfen adınızı giriniz.',
            'surname.required' => 'Lütfen soyadınızı giriniz.',
            'email.required' => 'Lütfen e-posta adresinizi giriniz.',
            'email.email' => 'Geçerli bir e-posta adresi giriniz.',
            'phone.required' => 'Lütfen telefon numaranızı giriniz.',
            'price.required' => 'Lütfen ödeme tutarını giriniz.',
            'price.min' => 'Ödeme tutarı en az 1 TL olmalıdır.',
            'address.required' => 'Lütfen ödeme açıklamasını giriniz.',
            'agreement.accepted' => 'Lütfen sözleşmeyi onaylayınız.',
        ]);

        if ($validator->fails()) {
            Log::info('Payment Validation Failed', $validator->errors()->toArray());

            return back()->withErrors($validator)->withInput();
        }

        $merchant_id = '127117';
        $merchant_key = 's9GH5FMuxFtqjxyJ';
        $merchant_salt = 'qTHTx3j4FjieXPP3';

        $price = $request->input('price') * 100; // Krş cinsinden

        // Get user IP (handling Cloudflare or standard)
        if (isset($_SERVER['HTTP_CLIENT_IP'])) {
            $ip = $_SERVER['HTTP_CLIENT_IP'];
        } elseif (isset($_SERVER['HTTP_X_FORWARDED_FOR'])) {
            $ip = $_SERVER['HTTP_X_FORWARDED_FOR'];
        } else {
            $ip = $_SERVER['REMOTE_ADDR'];
        }
        $user_ip = $ip;

        $merchant_oid = time(); // Benzersiz sipariş no
        $email = $request->input('email');
        $payment_amount = $price;
        $currency = 'TL'; // Default
        $test_mode = 0; // Canlı mod

        $user_name = $request->input('name').' '.$request->input('surname');
        $user_address = $request->input('address'); // Note field used as address
        $user_phone = $request->input('phone');

        // Callbacks should ideally be routes we define, but user provided specific URLs.
        // We will use routes relative to current domain or the ones user specified if they are absolute?
        // The user script had: "https://www.truncgil.com.tr/pay.php?ok"
        // I should probably use the current app's URL.
        $merchant_ok_url = route('payment.success');
        $merchant_fail_url = route('payment.fail');

        $user_basket = base64_encode(json_encode([
            ['Web / Mobil Yazılım', $payment_amount, 1],
        ]));

        $no_installment = 0;
        $max_installment = 9;
        $debug_on = 1;
        $timeout_limit = 30;

        $hash_str = $merchant_id.$user_ip.$merchant_oid.$email.$payment_amount.$user_basket.$no_installment.$max_installment.$currency.$test_mode;
        $paytr_token = base64_encode(hash_hmac('sha256', $hash_str.$merchant_salt, $merchant_key, true));

        $post_vals = [
            'merchant_id' => $merchant_id,
            'user_ip' => $user_ip,
            'merchant_oid' => $merchant_oid,
            'email' => $email,
            'lang' => 'tr',
            'payment_amount' => $payment_amount,
            'paytr_token' => $paytr_token,
            'user_basket' => $user_basket,
            'debug_on' => $debug_on,
            'no_installment' => $no_installment,
            'max_installment' => $max_installment,
            'user_name' => $user_name,
            'user_address' => $user_address,
            'user_phone' => $user_phone,
            'merchant_ok_url' => $merchant_ok_url,
            'merchant_fail_url' => $merchant_fail_url,
            'timeout_limit' => $timeout_limit,
            'currency' => $currency,
            'test_mode' => $test_mode,
        ];

        // Curl request
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, 'https://www.paytr.com/odeme/api/get-token');
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($ch, CURLOPT_POST, 1);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $post_vals);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
        curl_setopt($ch, CURLOPT_FRESH_CONNECT, true);
        curl_setopt($ch, CURLOPT_TIMEOUT, 20);
        $result = @curl_exec($ch);

        if (curl_errno($ch)) {
            return back()->with('error', 'PAYTR connection error. err:'.curl_error($ch));
        }
        curl_close($ch);

        $result = json_decode($result, 1);

        if ($result['status'] == 'success') {
            $token = $result['token'];

            // Re-render the online-payment page but with the token
            // We need to fetch the page content again
            // Assuming the slug is 'online-odeme' or similar, or we can just pass a dummy page object
            // if we are lazy, but correct way is to fetch the page associated with the route.
            // Since we are POSTing here, we don't know the Page model context unless we fetch it.
            // Let's try to assume 'online-odeme' which is common.

            $page = Page::where('template', 'online-payment')->orWhere('slug', 'online-odeme')->first();
            if (! $page) {
                $page = new Page(['title' => 'Online Ödeme', 'content' => '', 'excerpt' => 'Please complete your payment below.']);
            }

            return view('templates.corporate.online-payment', [
                'page' => $page,
                'paytr_token' => $token,
            ]);

        } else {
            return back()->with('error', 'PAYTR failed. reason:'.$result['reason']);
        }
    }

    public function success(Request $request)
    {
        $page = Page::where('template', 'online-payment')->orWhere('slug', 'online-odeme')->first();
        if ($page) {
            return redirect()->route('page.show', $page->slug)->with('success', 'Your payment has been charged successfully. This will appear on your credit card statement as "PAYTR ODEME HIZMETLERI"');
        }

        return redirect()->route('home')->with('success', 'Your payment has been charged successfully.');
    }

    public function fail(Request $request)
    {
        $page = Page::where('template', 'online-payment')->orWhere('slug', 'online-odeme')->first();
        if ($page) {
            return redirect()->route('page.show', $page->slug)->with('error', 'Your payment has not been charged successfully! Please check your credit card information.');
        }

        return redirect()->route('home')->with('error', 'Your payment has not been charged successfully! Please check your credit card information.');
    }
}