Payment Method

<?php

namespace App\Payments;

use Illuminate\Http\Request;
use App\Services\CurrencyService;
use Illuminate\Support\Facades\Log;
final class MethodName
{
    /**
     * Create a new Paypal instance.
     *
     * @param array<string, mixed> $config 
     *
     * Expected must have config keys:
     * - currency: Currency code (e.g., 'USD')
     * - currency_decimals: Number of decimal places for currency
     */
    
    public function __construct(protected array $config)
    {
        $this->currencyService = new CurrencyService();
    }

    /**
     * Return the payment form configuration.
     *
     * @return array<string, array<string, mixed>> The form configuration.
     */
    public function paymentForm(): array
    {
        return [
            'name' => [
                'label' => 'Payment Method',
                'type' => 'text',
                'default' => 'MethodName',
                'disabled' => true,
            ],
            // Your other form options
            'currency' => [
                'label' => 'Currency',
                'type' => 'text',
                'default' => 'USD',
                'disabled' => false,
            ],
            'currency_decimals' => [
                'label' => 'Decimal Places',
                'type' => 'integer',
                'default' => 2,
                'disabled' => false,
            ],
        ];
    }

    /**
     * Create a payment action for an order.
     *
     * @param array<string, mixed> $order Order details.
     * @return array<string, mixed> 
     * 
     * - notify_url can be retrieve from $this->config['notify_url']
     * Expected order keys:
     * - total_amount: The order amount
     * - pay_id: Unique payment identifier
     * - description : order description
     * - email : order email of the user
     * - user_id: user id
     * - cancel_url : payment cancel return url
     * - return_url:  order payment successful return url
     */
    public function pay(array $order): array
    {
        $requiredKeys = ['total_amount', 'pay_id'];
        foreach ($requiredKeys as $key) {
            if (!isset($order[$key])) {
                throw new \Exception(__("order.missing_key").$key);
            }
        }

        $rates = $this->currencyService->fetchRates();
        $defaultCurrency = config('xmplus.default_currency_code', 'USD'); // Fallback default currency
        if (!isset($rates[$this->config['currency']], $rates[$defaultCurrency])) {
            throw new \InvalidArgumentException(__('order.invalid_rate'));
        }

        $value = $rates[$this->config['currency']] / $rates[$defaultCurrency];
        $total = number_format((float) $order['total_amount'] * $value, $this->config['currency_decimals'], '.', '');

        try {
            // Process you payment method api here

            return [
                'data' => '',
                'link' => '',
                'total_amount' => $total,
                'external' => true,
            ];
        } catch (\Throwable $e) {
            Log::error('Paypal: ',[
                'message' => $e->getMessage(),
                'line' => $e->getLine(),
                'file' => $e->getFile(),
            ]);
            
            abort(422, $e->getMessage());
        }
    }

    /**
     * Handle callback notifications.
     *
     * @param Request $request 
     * @return array<string, mixed> Notification result with trade_no, callback_no, and code.
     */
    public function notify(Request $request)
    {
        $data = $request->input();

        try{
            return [
                'trade_no' => 'your order id set in payment order',
                'callback_no' => 'api callback transaction id',
                'code' => 200
            ];
        } catch (\Throwable $e) {
            Log::error('Notification exception', [
                'message' => $e->getMessage(),
                'line' => $e->getLine(),
            ]);
            
            return [
                'code' => 400,
                'message' => $e->getMessage(),
            ];
        }
        
        return ['code' => 200, 'status' => 'ok'];
    }
}