<?php
include 'auth.php';

if ($_SERVER['REQUEST_METHOD'] == 'POST') {
    if (empty($_POST['id'])) {
        require_permission('brands_add');
    } else {
        require_permission('brands_edit');
    }
    $id = $_POST['id'];
    $name = $_POST['name'];
    $current_logo = $_POST['current_logo'] ?? '';
    $logo_name = $current_logo;

    // Logo Upload
    if (isset($_FILES['logo']) && $_FILES['logo']['error'] == 0) {
        $upload_dir = '../uploads/brands/';
        $logo_name = uniqid() . '-' . basename($_FILES['logo']['name']);
        $target_file = $upload_dir . $logo_name;
        
        if (move_uploaded_file($_FILES['logo']['tmp_name'], $target_file)) {
            if (!empty($current_logo) && file_exists($upload_dir . $current_logo)) {
                unlink($upload_dir . $current_logo);
            }
        } else {
            header("Location: brands.php?error=Failed to upload logo");
            exit();
        }
    }

    if (empty($id)) {
        // INSERT
        $sql = "INSERT INTO brands (name, logo) VALUES (?, ?)";
        $stmt = $conn->prepare($sql);
        $stmt->bind_param("ss", $name, $logo_name);
    } else {
        // UPDATE
        $sql = "UPDATE brands SET name=?, logo=? WHERE id=?";
        $stmt = $conn->prepare($sql);
        $stmt->bind_param("ssi", $name, $logo_name, $id);
    }

    if ($stmt->execute()) {
        header("Location: brands.php?success=تم حفظ الماركة بنجاح");
    } else {
        header("Location: brands.php?error=حدث خطأ: " . $stmt->error);
    }

    $stmt->close();
    $conn->close();

} else {
    header("Location: brands.php");
    exit();
}
?>