<?php
/**
 * Payment Processing Helper
 * Handles marking invoices as paid and creating/extending orders
 */

if (!function_exists('process_payment_record')) {
    /**
     * Process payment record from webhook or capture
     * Marks invoices as paid and creates/extends orders
     * 
     * @param array $record Payment record with invoice, custom, amount, txid, etc.
     * @return bool True if successful, false otherwise
     */
    function process_payment_record($record) {
        global $db_host, $db_user, $db_pass, $db_name, $db_port, $table_prefix;
        
        // Extract payment details
        $invoice = $record['invoice'] ?? null;
        $custom = $record['custom'] ?? null;
        $txid = $record['resource_id'] ?? null;
        $amount = $record['amount'] ?? 0;
        
        // Require database connection
        require_once(__DIR__ . '/../../../includes/database_mysqli.php');
        $db = createDatabaseConnection($db_host, $db_user, $db_pass, $db_name, $db_port);
        if (!$db) {
            if (function_exists('site_log_error')) site_log_error('process_payment_db_fail', ['invoice'=>$invoice]);
            else error_log('[payment_success] DB connection failed for invoice=' . $invoice);
            return false;
        }
        
        $now = date('Y-m-d H:i:s');
        $esc_txid = mysqli_real_escape_string($db, (string)$txid);
        
        // Find invoices to mark as paid
        $invoices_to_process = [];
        
        // Try to match by custom_id (which should be invoice_id for single-item carts)
        if ($custom && ctype_digit((string)$custom)) {
            $invoice_id = intval($custom);
            $stmt = $db->prepare("SELECT * FROM " . $table_prefix . "billing_invoices WHERE invoice_id = ? AND status = 'due' LIMIT 1");
            if ($stmt) {
                $stmt->bind_param('i', $invoice_id);
                $stmt->execute();
                $result = $stmt->get_result();
                if ($result && $row = $result->fetch_assoc()) {
                    $invoices_to_process[] = $row;
                }
                $stmt->close();
            }
        }
        
        // If no match by custom_id, try matching all unpaid invoices for this payment amount
        // (This handles multi-item carts where custom_id isn't a single invoice_id)
        if (empty($invoices_to_process) && $invoice) {
            // Match by invoice reference from PayPal
            $esc_invoice = mysqli_real_escape_string($db, $invoice);
            $query = "SELECT * FROM " . $table_prefix . "billing_invoices WHERE status = 'due' AND description LIKE '%$esc_invoice%'";
            $result = mysqli_query($db, $query);
            if ($result) {
                while ($row = mysqli_fetch_assoc($result)) {
                    $invoices_to_process[] = $row;
                }
            }
        }
        
        // Process each invoice
        $processed_count = 0;
        foreach ($invoices_to_process as $inv) {
            $invoice_id = intval($inv['invoice_id']);
            $existing_order_id = intval($inv['order_id'] ?? 0);
            $user_id = intval($inv['user_id']);
            $service_id = intval($inv['service_id']);
            $home_name = mysqli_real_escape_string($db, $inv['home_name']);
            $ip = intval($inv['ip']);
            $max_players = intval($inv['max_players']);
            $qty = intval($inv['qty']);
            $duration = mysqli_real_escape_string($db, $inv['invoice_duration']);
            $invoice_amount = floatval($inv['amount']);
            $rcon_pw = mysqli_real_escape_string($db, $inv['remote_control_password'] ?? '');
            $ftp_pw = mysqli_real_escape_string($db, $inv['ftp_password'] ?? '');
            
            // Mark invoice as paid
            $upd_inv = $db->prepare("UPDATE " . $table_prefix . "billing_invoices SET status = 'paid', paid_date = ?, payment_txid = ?, payment_method = 'paypal' WHERE invoice_id = ? LIMIT 1");
            if ($upd_inv) {
                $upd_inv->bind_param('ssi', $now, $esc_txid, $invoice_id);
                $upd_inv->execute();
                $upd_inv->close();
            }
            
            // Check if this is a renewal (existing order_id > 0) or new order (order_id = 0)
            if ($existing_order_id > 0) {
                // RENEWAL: Extend the existing order's end_date
                // Calculate months to add
                $months = 0;
                $q = intval($qty);
                $invdur = strtolower(trim($duration));
                if (strpos($invdur, 'year') !== false) {
                    $months = $q * 12;
                } else {
                    $months = $q;
                }
                
                // Get current end_date and extend it
                $getEndDate = "SELECT end_date FROM " . $table_prefix . "billing_orders WHERE order_id = $existing_order_id LIMIT 1";
                $endDateResult = mysqli_query($db, $getEndDate);
                if ($endDateResult && mysqli_num_rows($endDateResult) === 1) {
                    $endRow = mysqli_fetch_assoc($endDateResult);
                    $current_end = $endRow['end_date'] ?? date('Y-m-d H:i:s');
                    
                    // Extend from current end_date or now (whichever is later)
                    $extend_from = (strtotime($current_end) > time()) ? $current_end : date('Y-m-d H:i:s');
                    $dt = new DateTime($extend_from);
                    if ($months > 0) {
                        $dt->modify('+' . intval($months) . ' months');
                    }
                    $new_end_date = $dt->format('Y-m-d H:i:s');
                    
                    // Update order with new end_date and payment info
                    $updateOrder = "UPDATE " . $table_prefix . "billing_orders 
                                   SET end_date = '$new_end_date', status = 'paid', payment_txid = '$esc_txid', paid_ts = '$now'
                                   WHERE order_id = $existing_order_id";
                    if (mysqli_query($db, $updateOrder)) {
                        if (function_exists('site_log_info')) site_log_info('payment_renewal_processed', ['order_id'=>$existing_order_id, 'invoice_id'=>$invoice_id, 'new_end_date'=>$new_end_date]);
                        else error_log("[payment_success] Extended order $existing_order_id to $new_end_date for invoice $invoice_id");
                        $processed_count++;
                    }
                }
            } else {
                // NEW ORDER: Create a new order record
                // Calculate months for end_date
                $months = 0;
                $q = intval($qty);
                $invdur = strtolower(trim($duration));
                if (strpos($invdur, 'year') !== false) {
                    $months = $q * 12;
                } else {
                    $months = $q;
                }
                
                $dt = new DateTime('now');
                if ($months > 0) {
                    $dt->modify('+' . intval($months) . ' months');
                }
                $end_date = $dt->format('Y-m-d H:i:s');
                
                // Insert order
                $insertOrder = "INSERT INTO " . $table_prefix . "billing_orders (
                    user_id, service_id, home_name, ip, max_players, qty, invoice_duration,
                    price, remote_control_password, ftp_password, status, order_date, end_date,
                    payment_txid, paid_ts
                ) VALUES (
                    $user_id, $service_id, '$home_name', $ip, $max_players, $qty, '$duration',
                    $invoice_amount, '$rcon_pw', '$ftp_pw', 'paid', '$now', '$end_date',
                    '$esc_txid', '$now'
                )";
                
                if (mysqli_query($db, $insertOrder)) {
                    $new_order_id = mysqli_insert_id($db);
                    
                    // Link invoice to order
                    $linkInvoice = "UPDATE " . $table_prefix . "billing_invoices SET order_id = $new_order_id WHERE invoice_id = $invoice_id";
                    mysqli_query($db, $linkInvoice);
                    
                    if (function_exists('site_log_info')) site_log_info('payment_new_order_created', ['order_id'=>$new_order_id, 'invoice_id'=>$invoice_id, 'end_date'=>$end_date]);
                    else error_log("[payment_success] Created order $new_order_id for invoice $invoice_id");
                    $processed_count++;
                }
            }
        }
        
        mysqli_close($db);
        
        if ($processed_count > 0) {
            if (function_exists('site_log_info')) site_log_info('payment_success_processed', ['count'=>$processed_count,'invoice'=>$invoice,'custom'=>$custom]);
            else error_log('[payment_success] Processed ' . $processed_count . ' invoice(s) - invoice=' . $invoice . ' custom=' . $custom);
            return true;
        } else {
            if (function_exists('site_log_warn')) site_log_warn('payment_success_no_match', ['invoice'=>$invoice,'custom'=>$custom]);
            else error_log('[payment_success] No matching invoices found for invoice=' . $invoice . ' custom=' . $custom);
            return false;
        }
    }
}
?>