//
//  Downloader.swift
//  Learn Genie
//
//  Created by Suraj Kumar Mandal on 07/09/21.
//

import Foundation

class Downloader {
    
//    class func loadFileSync(url: NSURL, completion:(_ path:String, _ error:NSError?) -> Void) {
//        let documentsUrl =  FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first! as NSURL
//        let destinationUrl = documentsUrl.appendingPathComponent(url.lastPathComponent!)
//        if FileManager().fileExists(atPath: destinationUrl!.path) {
//            print("file already exists [\(String(describing: destinationUrl?.path))]")
//            completion(destinationUrl!.path, nil)
//        } else if let dataFromURL = NSData(contentsOf: url as URL){
//            if dataFromURL.write(to: destinationUrl!, atomically: true) {
//                print("file saved [\(String(describing: destinationUrl?.path))]")
//                completion(destinationUrl!.path, nil)
//            } else {
//                print("error saving file")
//                let error = NSError(domain:"Error saving file", code:1001, userInfo:nil)
//                completion(destinationUrl!.path, error)
//            }
//        } else {
//            let error = NSError(domain:"Error downloading file", code:1002, userInfo:nil)
//            completion(destinationUrl!.path, error)
//        }
//    }
//
//    class func loadFileAsync(url: NSURL, completion:(_ path:String, _ error:NSError?) -> Void) {
//        let documentsUrl =  FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first! as NSURL
//        let destinationUrl = documentsUrl.appendingPathComponent(url.lastPathComponent!)
//        if FileManager().fileExists(atPath: destinationUrl!.path) {
//            print("file already exists [\(String(describing: destinationUrl?.path))]")
//            completion(destinationUrl!.path, nil)
//        } else {
//            let sessionConfig = URLSessionConfiguration.default
//            let session = URLSession(configuration: sessionConfig, delegate: nil, delegateQueue: nil)
//            let request = NSMutableURLRequest(url: url as URL)
//            request.httpMethod = "GET"
//            let task = session.dataTask(with: request as URLRequest, completionHandler: { (data: Data?, response: URLResponse?, error: Error?) -> Void in
//                if (error == nil) {
//                    if let response = response as? HTTPURLResponse {
//                        print("response=\(response)")
//                        if response.statusCode == 200 {
//                            if data.writeToURL(destinationUrl, atomically: true) {
//                                print("file saved [\(destinationUrl!.path)]")
//                                completion(destinationUrl!.path, error as NSError?)
//                            } else {
//                                print("error saving file")
//                                let error = NSError(domain:"Error saving file", code:1001, userInfo:nil)
//                                completion(destinationUrl!.path, error)
//                            }
//                        }
//                    }
//                }
//                else {
//                    print("Failure: \(String(describing: error?.localizedDescription))");
//                    completion(destinationUrl!.path, error as NSError?)
//                }
//            })
//            task.resume()
//        }
//    }
}