<?php
require_once(__DIR__ . '/../includes/config.inc.php');
require_once(__DIR__ . '/../../../includes/database_mysqli.php');
$sandbox       = true; // flip to false for Live
$client_id     = 'AfvY_C2zA_hTHxHq7TIhtOeub4xBdySYrt_Hjj3d_WYQwjWI9NfOAVOTeResx2rgZ_nP5tOoxQSAHw8c';
$client_secret = 'EJ216np9cAj9n7KSddez3fLVxGe-zi4oKKKl1YGqPp88XIikr4Qzbxh0XW2as-V6LgdX-upjtQAg9dC0';

header('Content-Type: application/json');
$in = json_decode(file_get_contents('php://input'), true) ?: [];
$order_id = $in['order_id'] ?? null;
if (!$order_id) { http_response_code(400); echo json_encode(['error'=>'missing order_id']); exit; }

$api = $sandbox ? 'https://api-m.sandbox.paypal.com' : 'https://api-m.paypal.com';

$ch = curl_init("$api/v1/oauth2/token");
curl_setopt_array($ch, [
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_POST => true,
  CURLOPT_POSTFIELDS => 'grant_type=client_credentials',
  CURLOPT_HTTPHEADER => ['Accept: application/json'],
  CURLOPT_USERPWD => $client_id . ':' . $client_secret,
]);
$tok  = curl_exec($ch);
$http = curl_getinfo($ch, CURLINFO_HTTP_CODE);
curl_close($ch);
if ($http !== 200) { http_response_code(500); echo json_encode(['error'=>'oauth_fail']); exit; }
$access = json_decode($tok, true)['access_token'] ?? null;

$ch = curl_init("$api/v2/checkout/orders/$order_id/capture");
curl_setopt_array($ch, [
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_POST => true,
  CURLOPT_HTTPHEADER => [ 'Content-Type: application/json', 'Authorization: Bearer ' . $access ],
]);
$res  = curl_exec($ch);
$http = curl_getinfo($ch, CURLINFO_HTTP_CODE);
$curl_err = curl_error($ch);
curl_close($ch);

// Normalize response: ensure we always return valid JSON to the caller
if ($res === false || $res === '') {
    // Curl-level failure or empty body
    http_response_code(502);
    $out = ['error' => 'paypal_empty_response', 'http' => $http, 'curl_error' => $curl_err];
    echo json_encode($out);
    exit;
}

// Attempt to decode PayPal response
$capture = json_decode($res, true);
if (json_last_error() !== JSON_ERROR_NONE) {
    // PayPal returned non-JSON / malformed response — return it as raw string inside JSON
    http_response_code(502);
    $out = ['error' => 'paypal_invalid_json', 'http' => $http, 'raw' => $res];
    echo json_encode($out);
    exit;
}

if ($http !== 201 && $http !== 200) {
    http_response_code($http);
    // Return structured JSON with PayPal's decoded response
    echo json_encode(['error' => 'paypal_capture_failed', 'http' => $http, 'response' => $capture]);
    exit;
}

// Extract payment details
$txid = null;
$captureStatus = $capture['status'] ?? 'UNKNOWN';
if (isset($capture['purchase_units'][0]['payments']['captures'][0])) {
    $txid = $capture['purchase_units'][0]['payments']['captures'][0]['id'] ?? null;
}

// Get custom_id (should be invoice_id from cart.php)
$custom_id = $capture['purchase_units'][0]['custom_id'] ?? null;

if ($captureStatus === 'COMPLETED' && $custom_id) {
    // Connect to database
    $db = createDatabaseConnection($db_host, $db_user, $db_pass, $db_name, $db_port);
    if (!$db) {
        error_log('capture_order.php: DB connection failed');
        echo $res;
        exit;
    }

    // Find all invoices with status='due' for this user (cart session)
    // For now, we'll mark ALL due invoices for the logged-in user as paid
    // TODO: Improve to match specific invoice_id from custom_id if cart sends it
    session_start();
    $user_id = isset($_SESSION['user_id']) ? intval($_SESSION['user_id']) : 0;
    
    if ($user_id > 0) {
        // Mark all due invoices for this user as paid
        $now = date('Y-m-d H:i:s');
        $esc_txid = mysqli_real_escape_string($db, $txid);
        
        $updateInvoices = "UPDATE ogp_billing_invoices 
                          SET status='paid', paid_date='$now', payment_txid='$esc_txid', payment_method='paypal'
                          WHERE user_id=$user_id AND status='due'";
        mysqli_query($db, $updateInvoices);
        
        // Get all invoices we just marked paid
        $getInvoices = "SELECT * FROM ogp_billing_invoices WHERE user_id=$user_id AND payment_txid='$esc_txid'";
        $invoicesResult = mysqli_query($db, $getInvoices);
        
        // For each invoice, create an order
        while ($inv = mysqli_fetch_assoc($invoicesResult)) {
            $invoice_id = intval($inv['invoice_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']);
            $amount = floatval($inv['amount']);
            $rcon_pw = mysqli_real_escape_string($db, $inv['remote_control_password']);
            $ftp_pw = mysqli_real_escape_string($db, $inv['ftp_password']);
            
            // Calculate end_date based on qty * duration
            $end_date = date('Y-m-d H:i:s', strtotime("+$qty $duration"));
            
            // Insert order
            $insertOrder = "INSERT INTO ogp_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',
                $amount, '$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
                $linkInvoice = "UPDATE ogp_billing_invoices SET order_id=$new_order_id WHERE invoice_id=$invoice_id";
                mysqli_query($db, $linkInvoice);
                
                error_log("capture_order.php: Created order $new_order_id for invoice $invoice_id");
            } else {
                error_log("capture_order.php: Failed to create order for invoice $invoice_id: " . mysqli_error($db));
            }
        }
        
        mysqli_close($db);
    }
}

// Return the full PayPal response (normalized JSON) for proper processing
echo json_encode($capture);

?>