<?php
session_start();
include "koneksi.php";

header('Content-Type: application/json');

if (!isset($_SESSION['user_id'])) {
    echo json_encode(['success' => false, 'message' => 'Not logged in']);
    exit;
}

$data = json_decode(file_get_contents('php://input'), true);
$user_id = $_SESSION['user_id'];
$balance = intval($data['balance']);

// Update balance di database
$sql = "UPDATE users SET balance = ? WHERE id = ?";
$stmt = mysqli_prepare($conn, $sql);
mysqli_stmt_bind_param($stmt, "ii", $balance, $user_id);

if (mysqli_stmt_execute($stmt)) {
    // Update session
    $_SESSION['balance'] = $balance;
    
    // Log transaction jika perlu
    if (isset($data['transaction'])) {
        $transaction = $data['transaction'];
        $log_sql = "INSERT INTO transactions (user_id, type, amount, description) 
                   VALUES (?, ?, ?, ?)";
        $log_stmt = mysqli_prepare($conn, $log_sql);
        mysqli_stmt_bind_param($log_stmt, "ssis", 
            $user_id, 
            $transaction['type'], 
            $transaction['amount'],
            $transaction['description']
        );
        mysqli_stmt_execute($log_stmt);
    }
    
    echo json_encode([
        'success' => true, 
        'new_balance' => $balance,
        'message' => 'Balance updated successfully'
    ]);
} else {
    echo json_encode(['success' => false, 'message' => 'Database error']);
}
?>