import Foundation

class NetworkLogger: NSObject, URLSessionDelegate, URLSessionTaskDelegate {
    static var shared = NetworkLogger()

    private override init() {}

    func urlSession(_ session: URLSession, task: URLSessionTask, willPerformHTTPRedirection response: HTTPURLResponse, newRequest request: URLRequest, completionHandler: @escaping (URLRequest?) -> Void) {
        print("Redirecting to:", request.url?.absoluteString ?? "")
        completionHandler(request)
    }

    func urlSession(_ session: URLSession, task: URLSessionTask, didCompleteWithError error: Error?) {
        if let error = error {
            print("Error:", error.localizedDescription)
        }
    }

    func urlSession(_ session: URLSession, dataTask: URLSessionDataTask, didReceive data: Data) {
        if let responseString = String(data: data, encoding: .utf8) {
            print("Response:", responseString)
        }
    }

    func urlSession(_ session: URLSession, task: URLSessionTask, didSendBodyData bytesSent: Int64, totalBytesSent: Int64, totalBytesExpectedToSend: Int64) {
        print("Sent", totalBytesSent, "bytes")
    }
}

// 네트워크 요청할 때 로그를 출력하기 위해 URLSessionConfiguration을 설정합니다.
let configuration = URLSessionConfiguration.default
configuration.protocolClasses?.insert(NetworkLogger.self, at: 0)

let session = URLSession(configuration: configuration)

// 실제 네트워크 요청을 보냅니다.
let urlString = "https://www.example.com"
if let url = URL(string: urlString) {
    let request = URLRequest(url: url)
    let task = session.dataTask(with: request) { (data, response, error) in
        if let error = error {
            print("Error:", error.localizedDescription)
        } else if let data = data {
            if let responseString = String(data: data, encoding: .utf8) {
                print("Response:", responseString)
            }
        }
    }
    task.resume()
}