<?php

namespace App\Http\Controllers\pay;

use App\Http\Controllers\Controller;
use App\Models\Withdraw;
use App\Services\ConfigService;
use App\Services\Payment\Contracts\SupportsStatusQuery;
use App\Services\Payment\WalletDepositCreditor;
use App\Services\Payment\WalletPaymentManager;
use Illuminate\Http\Request;
use InvalidArgumentException;
use RuntimeException;
use Symfony\Component\HttpKernel\Exception\UnprocessableEntityHttpException;

/**
 * API عمومی شارژ آنلاین کیف — بدون افشای credential به کلاینت.
 * انتخاب درگاه فقط سمت سرور (wallet_payment_provider).
 */
class WalletPaymentController extends Controller
{
    public function __construct(
        private WalletPaymentManager $payments,
        private ConfigService $config,
        private WalletDepositCreditor $creditor,
    ) {
    }

    /**
     * فقط فلگ نمایش دکمه — بدون نام درگاه و بدون تنظیمات محرمانه.
     */
    public function options()
    {
        return response()->json($this->payments->publicOptions());
    }

    public function initiate(Request $request)
    {
        $gateway = $this->payments->resolve();
        if (!$gateway || !$gateway->isAvailable()) {
            throw new UnprocessableEntityHttpException('پرداخت آنلاین در حال حاضر فعال نیست');
        }

        $amount = (int) $request->input('value', $request->input('amount', 0));
        $minDeposit = $this->config->getInt('min_deposit', 0);
        if ($amount < 1000) {
            throw new UnprocessableEntityHttpException('حداقل مبلغ پرداخت ۱۰۰۰ ریال است');
        }
        if ($minDeposit > 0 && $amount < $minDeposit) {
            throw new UnprocessableEntityHttpException(
                'حداقل مقدار واریز ' . number_format($minDeposit) . ' ریال است'
            );
        }

        $customer = auth('customer')->user();
        self::assertCustomerIdentityVerified($customer instanceof \App\Models\Customer ? $customer : null);
        $withdraw = Withdraw::create([
            'customer_id' => $customer->id,
            'cash' => $amount,
            'note' => 'واریز آنلاین',
            'sts' => 1,
        ]);

        $referenceId = 'WD-' . $withdraw->id;

        try {
            $result = $gateway->initiate([
                'amount' => $amount,
                'reference_id' => $referenceId,
                'description' => 'شارژ کیف پول کاربر ' . ($customer->name ?? $customer->id),
                'metadata' => [
                    'withdraw_id' => $withdraw->id,
                    'customer_id' => $customer->id,
                ],
            ]);
        } catch (RuntimeException $e) {
            $withdraw->sts = 3;
            $withdraw->save();

            \Log::warning('wallet.payment.initiate_failed', [
                'withdraw_id' => $withdraw->id,
                'message' => $e->getMessage(),
            ]);

            return response()->json([
                'message' => $e->getMessage() ?: 'مشکل در ارتباط با درگاه',
            ], 422);
        }

        if (!empty($result['session_id'])) {
            $withdraw->tracked_number = (string) $result['session_id'];
            $withdraw->save();
        }

        // حداقل اطلاعات برای redirect — بدون credential و بدون جزئیات داخلی درگاه
        return response()->json([
            'payment_url' => $result['payment_url'],
        ], 201);
    }

    /**
     * وریفای برگشت مرورگر از فرانت — امضا و شارژ سمت سرور؛ بدون افشای secret.
     * Body یا query: status, reference_id, session_id, amount, track_number, timestamp, signature
     */
    public function verifyReturn(Request $request)
    {
        $gateway = $this->payments->resolve();
        if (!$gateway) {
            throw new UnprocessableEntityHttpException('پرداخت آنلاین فعال نیست');
        }

        // همه پارامترهای برگشت عیناً وارد امضا می‌شوند؛ whitelist کردن باعث
        // مغایرت امضا می‌شود اگر پارتنر پارامتر اضافه‌ای بفرستد.
        $payload = [];
        foreach ($request->all() as $key => $value) {
            if (!is_string($key) || $key === '' || is_array($value) || $value === null) {
                continue;
            }
            if (count($payload) >= 30) {
                break;
            }
            $payload[$key] = is_bool($value) ? ($value ? 'true' : 'false') : (string) $value;
        }

        if (($payload['signature'] ?? '') === '' || ($payload['reference_id'] ?? '') === '') {
            return response()->json([
                'ok' => false,
                'message' => 'پارامترهای بازگشت ناقص است',
            ], 422);
        }

        $result = $gateway->handleReturnPayload($payload);

        if (!($result['ok'] ?? false)) {
            // redirect مرورگر قابل اعتماد نیست؛ منبع حقیقت، استعلام مستقیم از درگاه است.
            $fallback = $this->statusFallback((string) $payload['reference_id']);
            if ($fallback) {
                return $fallback;
            }

            return response()->json([
                'ok' => false,
                'message' => $result['message'] ?? 'خطا در تأیید پرداخت',
            ], (int) ($result['http_status'] ?? 400));
        }

        /** @var Withdraw|null $withdraw */
        $withdraw = $result['withdraw'] ?? null;
        if (!$withdraw) {
            return response()->json(['ok' => false, 'message' => 'سفارش یافت نشد'], 404);
        }

        if (!$this->ownsWithdraw($withdraw)) {
            return response()->json(['ok' => false, 'message' => 'دسترسی غیرمجاز'], 403);
        }

        $paid = (int) $withdraw->sts === 2;

        return $this->paymentStateResponse(
            $withdraw,
            $paid ? 'success' : ((string) ($payload['status'] ?? '') === 'success' ? 'pending' : 'failed')
        );
    }

    /**
     * استعلام وضعیت یک پرداخت از درگاه — برای polling فرانت وقتی نتیجه هنوز قطعی نیست.
     */
    public function status(Request $request)
    {
        $referenceId = trim((string) $request->input('reference_id', ''));
        if ($referenceId === '') {
            return response()->json(['ok' => false, 'message' => 'شناسه پرداخت ارسال نشده'], 422);
        }

        $response = $this->statusFallback($referenceId);
        if ($response) {
            return $response;
        }

        return response()->json(['ok' => false, 'message' => 'سفارش یافت نشد'], 404);
    }

    /**
     * استعلام مستقیم وضعیت از درگاه با بررسی مالکیت سفارش.
     */
    private function statusFallback(string $referenceId): ?\Illuminate\Http\JsonResponse
    {
        $withdraw = $this->creditor->findByReference($referenceId);
        if (!$withdraw || !$this->ownsWithdraw($withdraw)) {
            return null;
        }

        if ((int) $withdraw->sts !== 2) {
            $gateway = $this->payments->resolve();
            if ($gateway instanceof SupportsStatusQuery) {
                $gateway->syncStatusByReference($referenceId);
                $withdraw = $withdraw->fresh() ?: $withdraw;
            }
        }

        $sts = (int) $withdraw->sts;

        return $this->paymentStateResponse(
            $withdraw,
            match ($sts) {
                2 => 'success',
                3 => 'failed',
                default => 'pending',
            }
        );
    }

    private function ownsWithdraw(Withdraw $withdraw): bool
    {
        return (int) $withdraw->customer_id === (int) auth('customer')->id();
    }

    private function paymentStateResponse(Withdraw $withdraw, string $status): \Illuminate\Http\JsonResponse
    {
        return response()->json([
            'ok' => true,
            'paid' => (int) $withdraw->sts === 2,
            'status' => $status,
            'amount' => (int) $withdraw->cash,
            'reference_id' => 'WD-' . $withdraw->id,
            'withdraw_id' => $withdraw->id,
            'track_number' => $withdraw->tracked_number,
        ]);
    }

    public function returnFromGateway(Request $request, string $provider)
    {
        try {
            $gateway = $this->payments->resolveOrFail($provider);
        } catch (InvalidArgumentException $e) {
            return response('درگاه نامعتبر', 404);
        }

        $result = $gateway->handleReturn($request);
        if (!($result['ok'] ?? false)) {
            return response(
                (string) ($result['message'] ?? 'خطا'),
                (int) ($result['http_status'] ?? 400)
            );
        }

        $Withdraw = $result['withdraw'];
        $site_url = $this->config->resolvePublicSiteUrl($request) ?: '/';

        return view('showTransactionReport', compact('Withdraw', 'site_url'));
    }

    public function webhook(Request $request, string $provider)
    {
        try {
            $gateway = $this->payments->resolveOrFail($provider);
        } catch (InvalidArgumentException $e) {
            return response()->json(['message' => 'invalid_provider'], 404);
        }

        $result = $gateway->handleWebhook($request);
        $status = (int) ($result['http_status'] ?? 200);

        if (!($result['ok'] ?? false)) {
            return response()->json([
                'message' => $result['message'] ?? 'error',
            ], $status >= 400 ? $status : 400);
        }

        return response()->json([
            'ok' => true,
            'ignored' => (bool) ($result['ignored'] ?? false),
        ]);
    }

    /** سازگاری با URLهای قبلی external-payment/* → montify */
    public function returnLegacy(Request $request)
    {
        return $this->returnFromGateway($request, WalletPaymentManager::PROVIDER_MONTIFY);
    }

    public function webhookLegacy(Request $request)
    {
        return $this->webhook($request, WalletPaymentManager::PROVIDER_MONTIFY);
    }
}