<?php
    session_start();
    require '../../../assets/utils/db_auth.php';
    require '../../../assets/utils/classes/FileUploader.php';
    require '../../../assets/utils/classes/ProductManager.php';

    require_role($user_role, ['owner', 'admin']);

    $id            = (int)$data['id'];
    $min_stock     = (float)($data['min_stock']     ?? 0);
    $reorder_point = (float)($data['reorder_point'] ?? 0);

    if ($min_stock < 0 || $reorder_point < 0) {
        $answer['success'] = 0;
        $answer['message'] = 'Min stock and reorder point cannot be negative.';
        http_response_code(400);
        exit(json_encode($answer));
    }

    if ($min_stock > $reorder_point) {
        $answer['success'] = 0;
        $answer['message'] = "Min stock ({$min_stock}) must be less than or equal to reorder point ({$reorder_point}).";
        http_response_code(400);
        exit(json_encode($answer));
    }

    try {
        /** 1. FILE HANDLING **/
        $uploader = new FileUploader($include_url . 'uploads/product/');

        if (!empty($_FILES['product_image']['name'])) {
            if ($id > 0) {
                $sql = "SELECT `product_image` FROM md_product WHERE company_id = :company_id AND id = :id";
                $sth = $pdo2->prepare($sql);
                $sth->execute([':company_id' => $company_id, ':id' => $id]);
                $uploader->cleanup($sth->fetchColumn(), '');
            }

            $errors = $uploader->upload('product_image');
            if (!empty($errors)) {
                $answer['success'] = 0;
                $answer['message'] = $errors[0];
                exit(json_encode($answer));
            }

            $db_image_string = $uploader->getUploadedFiles()[0] ?? '';
        } else {
            $db_image_string = $data['keep_files'] ?? '';
        }

        /** 2. DATABASE **/
        dbTransaction($pdo2, function($pdo) use ($data, $company_id, $logging, $db_image_string) {
            $product = new ProductManager($pdo, $company_id);
            $product->saveProduct($data, $logging, $db_image_string);
        });

        $answer['success'] = 1;

    } catch (PDOException $e) {
        if (isset($uploader)) $uploader->rollbackUploads();
        $answer['success'] = 0;
        $answer['message'] = 'Database error, please try again';
        http_response_code(500);

    } catch (Exception $e) {
        if (isset($uploader)) $uploader->rollbackUploads();
        $answer['success'] = 0;
        $answer['message'] = $e->getMessage();
        http_response_code(400);
    }

    exit(json_encode($answer));
?>