import Foundation

func default_components(bucket: String, key: String? = nil, query_items: [URLQueryItem] = []) -> URLComponents {
    var components = URLComponents()
    components.scheme = "https"
    components.host = "endpoint"
    components.path = key == nil ? "/\(bucket)" : "/\(bucket)/\(key!)"
    components.queryItems = query_items

    return components
}

func list_objects(in bucket: String, prefix: String = "", marker: String = "", delimiter: String = "", max_keys: Int = 1000) -> URLRequest {
    var components = default_components(bucket: bucket)
    components.queryItems?.append(URLQueryItem(name: "prefix", value: prefix))
    components.queryItems?.append(URLQueryItem(name: "max-keys", value: String(max_keys))) // I think this is the line that crashes. But reducing further than this somehow eliminates the crash
    components.queryItems?.append(URLQueryItem(name: "marker", value: marker))
    components.queryItems?.append(URLQueryItem(name: "delimiter", value: delimiter))


    let headers: [String: String] = [
        "Date": "\(Date())",
    ]

    var request = URLRequest(url: components.url!, timeoutInterval: 60)
    request.httpMethod = "GET"
    for (key, value) in headers {
        request.addValue(value, forHTTPHeaderField: key)
    }

    return request
}

list_objects(
    in: "bucket",
    marker: ""
)