<?php

namespace App\Services\Payment;

use App\Enums\PaymentStatusEnum;
use App\Models\Payment;
use App\Models\User;
use Illuminate\Support\Facades\Http;
use RuntimeException;

class ZibalPaymentService
{
    protected const API_URL = 'https://gateway.zibal.ir/v1';
    protected const START_URL = 'https://gateway.zibal.ir/start';

    public function request(User $payer, int $amount, string $orderId, array $attributes = []): Payment
    {
        $response = Http::post(self::API_URL . '/request', [
            'merchant' => $this->merchant(),
            'amount' => $amount * 10,
            'callbackUrl' => $this->callbackUrl(),
            'orderId' => $orderId,
        ])->json();

        if (($response['result'] ?? null) !== 100) {
            throw new RuntimeException('خطا در ایجاد درخواست پرداخت: ' . ($response['message'] ?? 'پاسخ نامعتبر از درگاه'));
        }

        return Payment::create(array_merge([
            'track_id' => (string) $response['trackId'],
            'amount' => $amount,
            'status' => PaymentStatusEnum::Pending->value,
            'payer_id' => $payer->id,
        ], $attributes));
    }

    public function paymentUrl(Payment $payment): string
    {
        return self::START_URL . '/' . $payment->track_id;
    }

    public function verify(Payment $payment): Payment
    {
        if ($payment->status !== PaymentStatusEnum::Pending) {
            return $payment;
        }

        $response = Http::post(self::API_URL . '/verify', [
            'merchant' => $this->merchant(),
            'trackId' => $payment->track_id,
        ])->json();

        if (in_array($response['result'] ?? null, [100, 201], true)) {
            $payment->update([
                'status' => PaymentStatusEnum::Paid->value,
                'ref_number' => $response['refNumber'] ?? null,
                'verified_at' => now(),
            ]);
        } else {
            $payment->update(['status' => PaymentStatusEnum::Failed->value]);
        }

        return $payment;
    }

    public function markFailed(Payment $payment): Payment
    {
        if ($payment->status === PaymentStatusEnum::Pending) {
            $payment->update(['status' => PaymentStatusEnum::Failed->value]);
        }

        return $payment;
    }

    protected function merchant(): string
    {
        return config('services.zibal.sandbox') ? 'zibal' : config('services.zibal.merchant');
    }

    protected function callbackUrl(): string
    {
        return config('services.zibal.callback_url') ?: route('dashboard.payments.callback');
    }
}