diff --git a/aluxpay-payment-gateway/README.txt b/aluxpay-payment-gateway/README.txt
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+=== Custom Payment Gateway ===
+Contributors: ALUXB
+Tags: woocommerce, payment, paypal, gateway
+Requires at least: 5.8
+Tested up to: 6.3
+Requires PHP: 7.4
+Stable tag: 1.0.0
+License: GPLv2 or later
+License URI: https://www.gnu.org/licenses/gpl-2.0.html
+
+A custom WooCommerce payment gateway that redirects to a standalone payment website with PayPal integration.
+
+== Description ==
+
+This plugin adds a custom payment gateway to WooCommerce that redirects customers to a standalone payment processing website. The payment website handles PayPal transactions securely and returns the customer back to WooCommerce with the payment status.
+
+**Features:**
+
+* Seamless integration with WooCommerce checkout
+* Redirects to standalone payment website
+* Secure PayPal payment processing
+* Automatic order status updates
+* Test mode for development
+* Debug logging capabilities
+* Webhook support for payment notifications
+
+== Installation ==
+
+1. Upload the plugin files to the `/wp-content/plugins/custom-payment-gateway` directory, or install the plugin through the WordPress plugins screen directly.
+2. Activate the plugin through the 'Plugins' screen in WordPress
+3. Go to WooCommerce → Settings → Payments
+4. Enable "Custom Payment Gateway"
+5. Click "Manage" to configure the settings
+6. Enter your payment website URL
+7. Save changes
+
+== Configuration ==
+
+**Required Settings:**
+
+* **Title**: The payment method name shown to customers (e.g., "PayPal Payment")
+* **Description**: Text shown to customers during checkout
+* **Payment Website URL**: The URL of your standalone payment website (e.g., https://payment.yoursite.com/payment)
+
+**Optional Settings:**
+
+* **Test Mode**: Enable to use test/sandbox environment
+* **Debug Log**: Enable to log all gateway activities for troubleshooting
+
+== Payment Flow ==
+
+1. Customer proceeds to checkout on WooCommerce
+2. Selects "Custom Payment Gateway" as payment method
+3. Customer is redirected to the standalone payment website with order details
+4. Customer completes payment via PayPal
+5. Customer is redirected back to WooCommerce
+6. Order status is automatically updated based on payment result
+
+== Webhook Configuration ==
+
+Your standalone payment website should send webhook notifications to:
+`https://yoursite.com/?wc-api=custom_payment_gateway`
+
+Webhook payload should be JSON:
+```json
+{
+ "order_id": 123,
+ "transaction_id": "ABC123XYZ",
+ "status": "completed"
+}
+```
+
+== URL Parameters ==
+
+When redirecting to the payment website, the following parameters are sent:
+
+* `wc_order_id` - WooCommerce order ID
+* `total` - Order total amount
+* `currency` - Currency code (e.g., USD, EUR)
+* `description` - Order description
+* `customer_email` - Customer email address
+* `return_url` - URL to return after successful payment
+* `cancel_url` - URL to return if payment is cancelled
+* `_wpnonce` - Security nonce
+
+== Frequently Asked Questions ==
+
+= Does this work with PayPal? =
+
+Yes, this gateway is designed to work with a standalone payment website that processes PayPal payments.
+
+= Can I test payments without going live? =
+
+Yes, enable "Test Mode" in the gateway settings and use PayPal sandbox credentials on your payment website.
+
+= Where can I find the debug logs? =
+
+Enable "Debug log" in settings. Logs are stored in: WooCommerce → Status → Logs
+
+= How do I handle payment returns? =
+
+The plugin automatically handles returns from your payment website. Your payment website should redirect back to the `return_url` with appropriate parameters.
+
+== Changelog ==
+
+= 1.0.0 =
+* Initial release
+* Basic payment gateway functionality
+* Redirect to standalone payment website
+* PayPal integration support
+* Webhook handler
+* Debug logging
+
+== Upgrade Notice ==
+
+= 1.0.0 =
+Initial release of Custom Payment Gateway.
+
+== Support ==
+
+For support, please contact: support@yoursite.com
+
+== Technical Requirements ==
+
+* WordPress 5.8 or higher
+* WooCommerce 5.0 or higher
+* PHP 7.4 or higher
+* Standalone payment processing website
+* HTTPS/SSL certificate (required for production)
+
+== Integration with Your Payment Website ==
+
+Your payment website should:
+
+1. Accept GET parameters from WooCommerce (order_id, total, currency, etc.)
+2. Process payment via PayPal
+3. Send webhook notification to WooCommerce
+4. Redirect customer back to return_url with payment status
+
+Example redirect after successful payment:
+`https://yourstore.com/checkout/order-received/123/?key=wc_order_xyz&cpg_return=1&order_id=123&transaction_id=ABC123&payment_status=success`
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diff --git a/aluxpay-payment-gateway/aluxpay-payment-gateway.php b/aluxpay-payment-gateway/aluxpay-payment-gateway.php
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+++ b/aluxpay-payment-gateway/aluxpay-payment-gateway.php
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+' . __('Settings', 'aluxpay-payment-gateway') . '',
+ );
+ return array_merge($plugin_links, $links);
+ }
+
+} else {
+ /**
+ * WooCommerce not active notice
+ */
+ add_action('admin_notices', 'cpg_woocommerce_missing_notice');
+
+ function cpg_woocommerce_missing_notice() {
+ echo '' . sprintf(
+ esc_html__('AluxPay Payment Gateway requires WooCommerce to be installed and active. You can download %s here.', 'aluxpay-payment-gateway'),
+ 'WooCommerce'
+ ) . '
' . WC_Log_Handler_File::get_log_file_path($this->id) . ''),
+ 'default' => 'no',
+ ),
+ );
+ }
+
+ /**
+ * Process the payment and return the result
+ */
+ public function process_payment($order_id) {
+
+ $order = wc_get_order($order_id);
+
+ if ($this->debug) {
+ $this->log->info('Processing payment for order #' . $order_id, array('source' => $this->id));
+ }
+
+ // Mark as pending payment
+ $order->update_status('pending', __('Awaiting payment via AluxPay Payment Gateway.', 'aluxpay-payment-gateway'));
+
+ // Reduce stock levels
+ wc_reduce_stock_levels($order_id);
+
+ // Remove cart
+ WC()->cart->empty_cart();
+
+ // Build redirect URL with order parameters
+ $redirect_url = $this->get_payment_redirect_url($order);
+
+ if ($this->debug) {
+ $this->log->info('Redirecting to: ' . $redirect_url, array('source' => $this->id));
+ }
+
+ // Return redirect
+ return array(
+ 'result' => 'success',
+ 'redirect' => $redirect_url
+ );
+ }
+
+ /**
+ * Build payment redirect URL
+ */
+ private function get_payment_redirect_url($order) {
+
+ $params = array(
+ 'wc_order_id' => $order->get_id(),
+ 'total' => $order->get_total(),
+ 'currency' => $order->get_currency(),
+ 'description' => sprintf(__('Order #%s from %s', 'aluxpay-payment-gateway'), $order->get_id(), get_bloginfo('name')),
+ 'customer_email' => $order->get_billing_email(),
+ 'return_url' => $this->get_return_url($order),
+ 'cancel_url' => wc_get_checkout_url(),
+ );
+
+ // Add nonce for security
+ $params['_wpnonce'] = wp_create_nonce('cpg_payment_' . $order->get_id());
+
+ return add_query_arg($params, $this->payment_url);
+ }
+
+ /**
+ * Webhook handler for payment updates
+ */
+ public function webhook_handler() {
+
+ if ($this->debug) {
+ $this->log->info('Webhook received', array('source' => $this->id));
+ }
+
+ // Get the raw POST data
+ $raw_post = file_get_contents('php://input');
+ $decoded = json_decode($raw_post);
+
+ if (!$decoded || !isset($decoded->order_id) || !isset($decoded->transaction_id)) {
+ if ($this->debug) {
+ $this->log->error('Invalid webhook data received', array('source' => $this->id));
+ }
+ status_header(400);
+ die('Invalid data');
+ }
+
+ $order_id = absint($decoded->order_id);
+ $transaction_id = sanitize_text_field($decoded->transaction_id);
+ $status = sanitize_text_field($decoded->status);
+
+ $order = wc_get_order($order_id);
+
+ if (!$order) {
+ if ($this->debug) {
+ $this->log->error('Order not found: ' . $order_id, array('source' => $this->id));
+ }
+ status_header(404);
+ die('Order not found');
+ }
+
+ // Process based on status
+ if ($status === 'completed' || $status === 'COMPLETED') {
+
+ // Payment complete
+ $order->payment_complete($transaction_id);
+
+ // Add order note
+ $order->add_order_note(
+ sprintf(__('Payment completed via AluxPay Payment Gateway. Transaction ID: %s', 'aluxpay-payment-gateway'), $transaction_id)
+ );
+
+ if ($this->debug) {
+ $this->log->info('Payment completed for order #' . $order_id . ' Transaction ID: ' . $transaction_id, array('source' => $this->id));
+ }
+
+ status_header(200);
+ die('Success');
+
+ } else {
+
+ // Payment failed
+ $order->update_status('failed', __('Payment failed or was declined.', 'aluxpay-payment-gateway'));
+
+ if ($this->debug) {
+ $this->log->warning('Payment failed for order #' . $order_id, array('source' => $this->id));
+ }
+
+ status_header(200);
+ die('Marked as failed');
+ }
+ }
+
+ /**
+ * Output for the order received page
+ */
+ public function thankyou_page($order_id) {
+
+ if ($this->description) {
+ echo wpautop(wptexturize($this->description));
+ }
+
+ $order = wc_get_order($order_id);
+
+ if ($order && $order->get_status() === 'processing') {
+ echo '' . __('Your payment has been received and your order is being processed.', 'aluxpay-payment-gateway') . '
';
+ }
+ }
+
+ /**
+ * Add content to the WC emails
+ */
+ public function email_instructions($order, $sent_to_admin, $plain_text = false) {
+
+ if ($this->description && !$sent_to_admin && $this->id === $order->get_payment_method()) {
+ echo wpautop(wptexturize($this->description)) . PHP_EOL;
+ }
+ }
+}
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diff --git a/aluxpay-payment-gateway/includes/class-payment-return-handler.php b/aluxpay-payment-gateway/includes/class-payment-return-handler.php
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+++ b/aluxpay-payment-gateway/includes/class-payment-return-handler.php
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+payment_complete($transaction_id);
+ $order->add_order_note(
+ sprintf(__('Payment completed. Transaction ID: %s', 'aluxpay-payment-gateway'), $transaction_id)
+ );
+
+ // Redirect to success page
+ wp_redirect($order->get_checkout_order_received_url());
+ exit;
+
+ } elseif ($status === 'cancelled' || $status === 'failed') {
+
+ // Mark as failed
+ $order->update_status('failed', __('Payment was cancelled or failed.', 'aluxpay-payment-gateway'));
+
+ wc_add_notice(__('Payment was not completed. Please try again.', 'aluxpay-payment-gateway'), 'error');
+ wp_redirect(wc_get_checkout_url());
+ exit;
+
+ } else {
+
+ // Unknown status
+ wc_add_notice(__('Payment status unknown. Please contact support.', 'aluxpay-payment-gateway'), 'error');
+ wp_redirect(wc_get_checkout_url());
+ exit;
+ }
+ }
+}
+
+new CPG_Payment_Return_Handler();
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